,c
DEPaRTtdEliT sF f,g J qirBl!i:r1r: f ;; & LAII0i,ifr il AGEI{ig$iT
DEPARTMENTOF FISHERIESAND FAUNA WESTERN AUSTRALIA
REPORTNo. 10
AN INVESTIGATIONINTO THE STATUSOF INTRODUCEDTROUT (Salmo spp.)
By Dr. N.M. Morrissy
Published by the Director of Fisheries and Fauna, Perth. under the authority of the Hon. Ron Davies, M.L.A; Minister fo! Fisheries and Fauna _LL6
rssrf,rlon
v:rrr8fsnv N&tss|[
NI
a ooos ouTee I \ '-,/
ilooEt (EcocoEfi{r
iro soJvJsttr{J oJ;NI NofwiItss r.tr $v
€T-[€J+snYur3+s3.ll
?TrnedT)Ir€ saTreqsT$ .;o luauFedaq
88.iss 0 ^^ffmErr\Tmq \,\JIIT
I Introduction
II Distribution
(a) lreas coveretl by stocking activities 3
(t) w.t"rs il which trout occr:r )
D istributioa naP 't3 (c) ct:rnate
(a) r'row of streans 1B (e) water temperatr:res 18 21 (f ) Spaqning faci-lities lII Aburd-ance
(a) An6J-ers' catches ao
(b) Sanplir€
IT Sr:rcaarlr antl Conclusions 39
(a) oistritution 39
4q (b,l Abundance
v Recomenrl ati-ons ' o o 39
VI References 4o )+1 Appendix Centre Photographic Pl-ates Pa€es. aaJaqr,c$to srr^rn+a.r3tqqs1,3: qltlr . .s.ra19ue uosTJBduoc u-t a.req qsTJ op oqn aq+ a.rB TnJssaccns roH (t)
apqsTJ seceld pue .senbluqcel 8uc1ftre Jo uoT+ecTlsTrldos 6s.ra13ue Jo JeqrEnuJo srrr.re+uT uog1e11ollxa 1e s1drne11e+uasard Jo +uoqrre eq1 sg 1eq4 (7)
S,tgpnb pe8pe1nota1ceJo seTrar{sTJ a.r€ eJeq+ aJaqlAaJeqfi.asTe sJa+er q11n a.reduoc oJarl +noJ+ pgid Jo EuoT+€Tndod .;o aoueprmq€prrB uoTlnqTJ+sTp ar{+ saop l^oH ( | ) :uoT+€JapTsuocarrnba"r suol -1senb ?u-trao11oJer{+ uoT+en+Ts +uo.rmc sq+ Jo TesT€rdde TTnJ € Jog '(9951 'sToc.or$) eTq"TT"^€ s?r so+€+s ure+s€e eq+ uT +6aq oq+ q+Tir aTq€.reduocft4rqsTJ +er{+ raeT-o.aq+ o+ ( eq-L66L sr,r4ue3) ,ftaqs1.; +noJ+ TnJssaccns e roJ pooJ +ueTcT.lJnsul peplao.rd s.:a1e.u eq+ +eq+ uoTsnlcuoc aq+ norJ pel.rea uolu;do leuroJrrT +c?J qI .eJnTT?J ro ssaccns e paSpnf aq ?Tnoc uoT+"zT+?uTTccp+noJ+ Jeq+aqn uo uoT+eulrogrF , .pacuamoc r€aTc ou s?.|[ aJaq+ L96L LrE ser lesle.rrlde luas a:d eq+ uoq.tr . steatt 9E uaq+ arorn 8ug1se1 saT+T^T+oeftr-rncols pa8uolo.rd aq1 a4ldsaq
.(+sa;o?u-t TecTro+sTr{ Jo saT+TAT+o€ Jo s+rmooce roJ . L96l-e161. .f1a!cog uoT+€zT+errgTccy+nor; uor&ft- uo+raquad arl+ Jo €+JoiIaU Tenuuq aes) +oTJ+sTq uer.r€.Ueq+ uT rfJJ SuTs?oTaJ 1xr€ €^o pa+JodET ftrF{c+tsq uT ?a?€eccns tlfgceileo a1ea3.:d e u_t 8u31oe t.ua1x 1::lt3 .JrI usrli Lt5! ocrlFs +ser-q+nos Je[oT aq+ uT uo+Jequed +€ ?oJlueo ueaq seq srageu 8u_'r4oo+sJoJ +noJ+ Jo uoT+cnpoJd .f.reqcleg
.saT+TT€nb qsg.;-ame8 ou 3uoaaeu .qcTg$ s€r{ aq+ a{TT eT$?o ,(TqAFq oTTq.& (fa nfqU fr6oIFoA-EiiC' ffi) .relqqoc eq+ sT +uasard qsTJ a^T+€u e3.re1 .f{uo aqj .slaleu aseql Jo +sortr u-t luasa.rd sT (r{+TrS ffiCuTnuo=T-ffi) uo.r.zemsnouaS-rpu1 a9.re1 oq& .qs.TJeue8e uo .f.raqi1;: lrods .meleue ue apg.io.rd o+ eTT€J+snVuJo+sejl oq+ pacnpor+rt Jo +sa!.-qqn!ls Jo sJo+en ?rr€TuT o+u-T-"+tffit uaaq a^?q +noJ+ (uocpr€qcgg TT?ffi'€g'B) rcqnger pu€ (.T o@E) rrlrcxq qlos
Nori[3n@&INI r It is a-lso llpcrtant to conper': tne situaticn in Western Austrai"ia with the history of i-ntroduced- trout il Eastern Austra-l-ia. and New Zealadid"whe re tirere ltas b,).,ri];
(t) n" i-rlitiuf stoc (2) fishi-ng of hi6h quelity on relati-vely unexploited- stocks in waters little interfered with by naa. .And in recent years, (.r) fi"hi"e of grad.ual-ly declining quality, particularly ne ar large npnJ.roe ^f n^nr'lrJ-.inn drra in vvLrnwor rJ,llJ]16fi Ptrases (1) ana (Z) have been called, respectively, the accli.:natiz- '193-l). ation and maintena-nce stages (lobbs plase 13) ^ay be caffed the destructive stage. Hobbs 119J7) tu New Zea-l-aridard Nichol-t-s (1958) in Tasrnania showed that releases of artificial ly propa6ated. trout had. often been c ont irrued urnecessarif-y ilto stage (2) sfuce trout, once established., reproduce s atisfactoriJ-y. This situation exists jn N.2., Tasmalia, nost of Victoria aid N.S.W., and a srnall paxt of S.A. for streams. However, there a.re some parts of these fisheries which have had to continuously be restocked si-nce their J-nception because natural spaming is inad-equate since survival- of fish is poor due to su.mner climate. For exarople stocking is necessary in dams, fakes or streams where there are no feed-er streams with suitable spawni:ng gravef. Stocking is aL6o necessar;r to maintain fishabfe stocks i-n rnargi-nal areas where surviva.l- is poor, iI some years, due to high summer temperatules. The latter is the case for streams in western N.S"W., as l,ake (1917) poi.rrted out, as weLL as in western Victoria, and in S.A. These points become relevant when the l-atitude of the south-west, the altitude of the waters, a.rd the hot dry strnmer cfimate a.r:e considered. A d-istinctlon between the grointh rate ard. d-ensity of fish is need-ed in ev a,l-uatj:rg the success of the fishery in terms of angling benefits. To many a-nglers the captr.rre of a few Large trout per day is conparable with the capture of many snall- fish only a few of which are just legal size. Trout in narginal waters where density is fi-{nit ed by sr.loner cond-itions usually grow ertremely rapidly reachilg legal-size in a year or so. In contrast waters in colder regions usua-l-l-yhave a high density of fish but the fish grow more slowly. .J€+€^! pTqJn+ q+T^{ suep TTEUS .t edrffi 'suoo8el 'saryT .Ja+€r'ti J?aTc q+T /i,rsue? .ro Jo TTEUS . suep uoT+€8tJJE Er€ srlep ,{1ddns .za1e.pt . Z a&Cf .saTJ?+nqTJ+ JTar{+ pue sJa^Tu . L adlt6 :(z atne,l) Peraprsuoc oq prnoqs qcTq-&rsJa+€nL Jo sadf+ +uaJaJJTp Jo Jaqltrnu ? aJ€ oJeqfi .rncco +nor+ q cTq{' u-F sra+Efi (q) .uoTlen+Ts sTql {q +TncTJJTp apeu sT slFrn Sulcnpo,rdar-JTas se suollelndod p11,n' JO Sn+€+s eq+ Jo +uaussessv .eJaq lnoJ+ uT?+u-T?uo1 ,{.ressaceu sT SuFtco+s '.(.reqs aq+ Jeq+aqia .ro 1,;t aq+ Jo oi + aseqd ftrg.mp eTs?T?J+snV u1 saceld Jar{+o u-T apeu uaaq s€r{ qcTqrir aie+sTm auBs eq+ 3up1co1s TEnIruE panuF+uoc .{q .:aql aqra sT suT€mer 1eq1 uollsanb oqJ .uor+cnpor+u--E aq} uT ?auTJop -F+euT 'a.T 'qsTJ s€ qnoJ.I Jo uoT+Ez Tcc€ Jo eseqd aql JoJ pecnpoJ+uT Jo sJeqrnnu pue saceld aTq€+Tns,f1aq11 .3:osulra+ uT pa{co+s .rtlalenbape ueql aJorir uaaq a^€q +salFq+nos aq+ Jo sJa+€i aq+ +€q+ +qnop ou sT aJaqf,l . frfaTra^eg pu€ uTBuTl +€ "3'a) +noJ+ JoJ eTT+soq .rflsnolaqo a.r€ suoT+Tpuoc Jaluuns a.raqr{ seo.rE 'pauJecuoc o+uT papua+xa uaaq s?q 9u-T{co+s +?q1 uam,{e1 aq+ o+ aTq€+Tns +sortr 'eu11Fu1rds .readde suea:1s uaqn u1 ?as€aTar aJe r{sTJ esrcceq +€r{+ ui^or{s s€r{ sar+rrr+c? qcns Jo acual.radxg .(f a1qeJ1 sJequau,(q perIsTJ sIIIEar+s 8u11co1s 'E96V 'pa+sTxa ,;:o asod.md aq+ roJ uI peleada..r TT+m .f,1a3.re1qctq-u saT+aTcos uor+Ezrp[nTccy +noJ[ aq1 ftr-t.:aptsuoc .f,q pelelcaJdd€ r(TT€Jaua8 eq u€c peJa^oc s€oJe eq+ pu€.{g1rrg1ce sTq+ Jo prra+xa aqJ ..{ep luasa.rd tuol:aqua4 aq+ o+ pelco+s uaaq a^€q €eJ? apTn ? Ja^o srrEaJ+s 1e &aqcleq 'c- - r, -3-,- - -.t id a r^^4d uru.lJ pu? cpe|Il aJal4 s+JOJJa pauFnJS?elj UJUU] '!bt urtru+rll .s8upicols asoq+ uoJJ pa+sTsJad +noJ+ '.y.S salduexa +€q+ Ja^oos+€qn acua?T^a ou sT oJar{J . s.(ep esoql uT u1 ..2o,;: 6esec 'l(11p:aue8 aq+ s€r s€ TT€rtrs aJo pes€aTal r(JJ Jo Jeqmnu aq+ l€r{+ +qnop ou sT aJaq+ ga+€+s uJa+s€o eq+ ooJJ d;qs fq ?a+rodsueJ+ eq o+ pEq 'eu11uad.rag '.3.a qsTJ aq+ aculg .urolafutJg prle fa-^.r€Il +e +ueuqsTTq€+so 'lcadso;1a..r tqcTu.i TnJssaccns Jo ecu€qc 1seq31q eq+ poJaJJo o^€q pTnoqs u-T s aFLr€U8uTTftC aq+ Jo s€eJe eq+ u.r asor4 aJ€ ?auoT+uam srmaJ+S .?TT€J+snV ,3:o s1"red raq+o uT s€ .y".U uF +nor+ qsTTq€+sa o+ rtrn+uac eq+ Jo urn+ eq+ eJoJaq apeu aJa r s1due11e auos +€q+ ocueltFrto .r("re1uau9e.r,3:sT aJaq0 .saT+T^T+c?ftrp{co+s rfq pa.:9aocs€arv (€) ffi-E MAPI Iil9TRIBUTION6 TROUTII THEQUTH.WESTOFWA. - SnFA^tS coNTAtMNATnOUT / taeaeuug courArNte rtuur .,1i1 I t.J' a& fbtoF trrcl It,grill .. :..::l ;r:,'";'- z ttl':i'. .:...... :.'\. l. I :. l- 1- I' ia l: I I I ,-'- ;'' I \ I "Eg.lL.6l e++azeX+uerlure^oN aq+ ur o+ pa+uassn ptrc Q9.ll.5 uo poss€d +cv +uoupueov 1cy sat.reqslg aq1 J(q peleada.r sE,M(uoT+€s-l +eu-t1ccy 1no.rg,) +cv saTraqsTd eq+ Jo vJfI +red pa++azex .+9.L.g TTcunoc aallncaxg ,{q parroc.r€cuo1 1e.r1s1'es .;:Ii;*+ Jo TceT o+ enp pspuEqslp ,{1a1cog t,tueqTy 66'z'62 EE'z'gL laua8eTrelg ?i-re IJElruaC '96"L'VL pe++aze'J'6'L'Z TTcunoCe^T+ncexf, ^q paTTac -lre c uoT+€J+sTBad.+saJaluT Jo {c?T Jo asn€caq papueqsrp d+arcos zE'e'o, uTBT4i '85'Zv'Vv Po++azE'J'gE'L'z TTCunoc e^T+ncaxfl .,{q pallacuec uoJ+€r+sT8a6 .+saJa+uTJo {c€T - papir€qsz? ,t+aTcos e\'z'92 ,r1'z'ol +crJ+src Er? eTTToc .69'll'61 pa++az€i 'Eg'Ll'6 passtd 1cy +uau?uemv+cV seTraqsTdfq (uoT+E -sT+€m-rTccy1no.r6) 'y111 ++?d Jo T€adar .{q paTTacuec suo11e.r1s18ag /+i.q.q L+('E'61 dn8u1par,,r6-,(ea"mry z\"2t"Lt Z\"ZL'€Z usJJej[-uo+Ja quad 'poolDic?Tg 6\.9.8 6\.E.9' at' J '(t L sTL'z l{a1.raaeg-a1e prtre,.:.:re1'- au3luad.:e g LE'\'LZ 16.+t.BV .S.V.f ouei puE r4sTS rte^reg pe++azEx r6'5-.xtr r4=Fev A+aTcos Jo aEeN fr6t-rdfTfrffiffi .I3V SSTUSHSI.{IS f3V NI @(OICNI ssrr$r cos NorJVzr,rvWIT ccY Jooufi l aTqefi Tabl-e 2 -ITATERS I,ISTING OF TYPES OF AND IXGEND FOR MAP 1 Gatch rates are taken from log book. d.ata supplied. by ar€lers (See III,a). rTvErn..l tr'or an explarration of stream order see Fig. 2. Ilighe st Catch Bronn ow nate River Sasin NaEe of Strean Tr:out Trout (No. of Order he he Take ahl e mileJ fI .Alba.ny Coast 1 llaychilicqr .Riv. 1 2 King Creek I 2.7 J Angove Creek 1 I Good.ga River ( Blackcat Creek,) I KaLgarr River I b bIIII t lee]< 2 7 Napier Brook 2 0.0 8 Kirg R:iver 1 4.0 I 'l ! l,i.neburner s Creek fff Denmaxk 1 Marbellup Creek rl o.0 River 2 S]-eeroa.n River 1 J Hay River 1 4 Deruoaxk Rivex 1 fV Kent River 1 Kent River 1 2 3ow River 1 V XranlcLirr '1 Franlclin lliver 1 River 2 Gor{.on &iver 2 VI Sha.nnon 1 Deep River 1 o.o River Ileld River 2 Shannon River 1 Gardener River J Meerup River 1 VIf Walren River 1 Warxen River I 6.O Donbakup Brook 2 Treen Brook 2 1*) /+.o Lefrcy Brook 2 /*) 5 Bj€ 3"ook j 6 Eastbrook 1 5.o : .L I I t 11oo.16,fa1st1tr ;1. z {ooJqs a{erc Ol. t {oorg saoTDlcft 5 I z {ooJg suosltres I e rlooJg TTacueg Z z noo.:g an3o1 9 o'z z ilvw4tt s446 LJ Y z {aerC eTT"lI€TTe[ +f dl. z {aer3 TTeJ:rol€a t (*) , 1ea.:3 uo18u1u.roq 7 re^T8 o'+Fo't l. -rea1X fea.rzg L ,ta^reg IIIX (*) : JA^TU {cTfisurug z ,ra'/\-I-,u I ra^TU aTTIoC l. ETTTOCIIX z ra^TU uosn8Js$ t (*) Z {aeJ3 €ru{sof z Je^T{ I Ja^T[ uo+saJd L uo+834d IX L ra^TU Todeo ( L ra^Tu ass€A z +s€oc .:e4g 1a.re8*ey,i 1. uo+Tassng L'o z 4oo.:g sPreqdaqg g z >Ioorg dnTTTpre{on Z 0'i7 Z :1oo;g dnle9aag 9 o v, z >1oo.rg dn.:re81eq g; (*/ z >Iooag dnAuTTeE r? z 4oo.rg dnuueg 6 z {oorg uqof .+s z J3^TU o'z I ra^TE poorqseTg L poo${c?Tg z :Ioorg dnuTfuqt g o'8 z rlooJg oaTJ?g +l --^^-- ?^-^^ . o'0 z {ww4d ^s4trJ I z {oorg fTd Z r3^TU 6'e ** I .raagg .f11euuo6 L iClleuuoq .:ad qsl etq€q€ +uasoJd Je?J0 'ON ureeJ+s aueN uTs€g Ja^Tu JO +norJ +norf ImeJ+s Jo o+e iroqTrlet T lorg +s oqST r Ilighest Catch Bronrr Strea.ra Rainbow Rate Ri-ver Basil Name of Stream Orcter Trout Trout (No. of kesent hesent t ake able fishrper MLf,C,,I XfV Murray 1 Murray River l1 (*) * 35.2 lz River 2 Oakley Srook t: J Marrinup Creek lz 0.4 ,[ * Davies Brook t; 17.6 ! Holyoake Creek l2 b Dwerll_ngup I'rooK lt; o.0 / Swamp Oak Brook ]t: 8 Nanga Brook I Sp ) larJ-eY o1'693 ]l2 l0 Cypress Srook ll2 11 South Dardalup Ri v.2 1.4 'l 12 Conj urinup Creek I 1j Banksiada.le Creel t',}) 14. North Dandal-up Ri 4.0 15 Gronins Brook I /*) 16 Fosters Srook I - I * Ganning 1 Serpenti-ne River I 1 o.7 Serpentine z DIrK brool( r 2 Rivers .3 Vlhitly Fall-s Brook2 (*) 't I Cooralong Brook I 2 zt. Snake_Brook 2 5 I b du-Lt .brooK I 2 Sp 7 Big Brook I 2 8 J9 tr[ile Brook I 2 * 9 Canni-r€ River I 1 * 10 llongong Brook I 2 2.O Swan-Avon 1 SwanRiver I Rivers 2 Avon River I 2 J Dale River I 4 Jane Brook I 2 I Helena River I 2 5 Lermarcts Brook I (t) (*) euooJ€[ i o'+f {oorqse{€Jc f, )z suosr€s. g 6'z >1oorg an3o1 q L'z lfaa.reg 3 0'l. Sulf.rl+S S .raa1g .'{aa.reg Jo.0,Tu uo13u111a6 g ETTTOC ZL . su€p uoT+?9u.rr prre ,tlddns re+€r roFrBT (r ) (.r.oq ..:ed qsr.1: eTq"o{€+ +uasa4d +ueseJd Jo .oN) +noJJ +norJ uTs?g .rolTu a+eu i[oquT€u ufi,o.rg qc+ec +saqSTII 6 ildAL .uos€as SuTuaeds SuT.rnp qsTJ a.rnleu 3u3p1oq uee.:1s 11eug dg . +uppunq€ erortr sT peleuElsep seloedg *o .3rg1co1s aelr€a.r qsls.rad +noq+Tr 1ou op 1no.r6(o ) .,f11p.rn1eu +sTsrod pue luasa.rd +noJ[ * (*./ {oorg uTBrr-Ti Z s.ra.0'Tu (*) JartTIJ sJOOW TTTII-orooWJflU( ETTE rea qsTJ olq€o{"+ +uosoJd +uose4d .reBr0 Jo.oN) +noJfr +noxJ rtr€3J+S uPeJ+s JO oEBN uTs€g Ja^TF a+€u lloquT€u ut.o.Ig qo+Ec +seqBTH TYFE 2 Highest Catch Brown Rainbolr Rate River Basin Na;me of D am Trout Trout (No. of Present hesent tal.-eab].e fishrper nour,i 4q Serpentine Serpentile CaJining + ''t.0 Rivers 16 Swari-Avon J Mundaring Rivers /..\ ^ l.al-/ Dmarter oams I aE Canninr'- \ srcKrey q6hhahtin6 I VICIOITa + rlr Rivers ( Church-manI s Brook+ 1,[ Munay River Banksiadafe l'*)-\{ 0alc1ey r*l 1< Harvey Mornington Mi-Ll 11 fueston New irrigation dam River 8 ,lonneJJ.y J(av. Br:rm I s 0.2+ 7 Warren River Scabby gully + L,efroy 4.2 Shannon Shannon Mil-l (*) River Alb any Angov e Coast + Not open to public fishing. 10. .oo.rauire11,.daqcue; '4oo.rg ',{e1.req3 'sueu.peag !-xer. eoq --- -{1" : uo+Jaqued (8Li-!ddaS --- s,JaoBEa sa+"olt tue,lts :ee;re -(rreq.13 .s-roo?eT pr,'" slr{eT T€Jn+eN (T) : t1O-l!L! Types 3 and I us ualJy offer no spawning facilities for trout and raana6ement, i.e. period.ic stocking at about three year intervals, is necessary as each year-class grows to takeable size ard is removed.. Type 4 waters are tu-rbid fa:n dams il tle dryer, hotter areas east of the Darling coasta-l ranges. These da-ns were the basis of an extensive sales promotion campaign by the Pemberton Trout Board in the 1950rs which, for cl-i-natic reasons, was a failure. Growth of trout is poor in these dans arrd oxygen depl-etion may occur during the srmmer i'rr the bot- tom water d-ue to temperature stratification. Type J waters axe either natura.l lakes or lagoons nea:. the coast, or nan-made gully d.a.msi-rr the ra;rges. Some waters of the former cfass have sufficient depth of water to provide refuge from suromerheat for trout. These occur in the l.lb ariy distxict, south of Pemberton ald on the Perth coasta.f plain. Yfith fre quent restockix€ introductions are lcrovar to have been successful, e.9., i:r Deadrars l,ake south of Penberton a.nd-in Lake Yanchep. Currently lal The srnaJ-l maJr-mad-edaros of tJ?" 3 are f ound in the range s from Perth around to Alb a:ry. Usuafly these are smaLl- d-ams on private fand. There is no doubt that trout do extremely wefl in these dams and that if trout are preferred to manon the dams could represent the largest source of trout for food and sport. Restocking is necessary because the trout usually will not reproduce natirrally. Type 2 waters comprise water supply dams, not open to public an8lin8, and i-rrigation d.ans open to public mu-It i-re c re at iona-l- use. The l.arger d.amsof i-nterest are s ituated. on rivers in the Darling Scaxp between the .Iatitudes of Perth a-nd.Bunbury (Map 1). Mund.arfurg, Cannir€, ad Serpentine are public water supply dams. Serpentine dan was buift in 1961 on the Serpentine Ri-ver which by repute had been the best trout angling stream in II.A. urrtil this date. Serpenti:re d.am contains Rainbow trout of large averag e size as determined from observations of spawnirrg in streams which feed. into the dan. The existence of s ome self-reprod-uc i:rg trout is aLso l The irrigation d.a-nsWa"roona, Samsons, Logue Brook, Harvey, Drakes - Brook, StjJIin€, md Wellington carr be rated in that order from contain- ing trout in abund-ance at the present ti:me to not containing trout (Wellfugton). Drakesbrook and. Harvey have Waroona a"nd Stirling dams, respectively, upstream from then on the large supply rivers. Waroona, Samsons and Logue Brook have onJ.y very smaff streams entering them. ^c -- "tl .d.recg 3u11..re6ar{+ Jo JapJoq uJa+s"a aq+ uo d^BB +noq€ o+ uoT}coJTp '1seoc pu" - €ere q+nos aq+ -t1.ra1sea ue u1 +so.,i\ aq+ morJ ( SpS t1) +s€oc rnoJJ uor 1. aJ r r -,{1.rcq1.:ouE u-J asEarcuT (,(JenJqJJ ,(11cnsn) q+uoul Jdulnns '+s€oc lsa+1oq aq+ JoJ s a.m1e.radua1 JT€ ltrntuTx"ttru€3N q+nos aq+ uo 'tTuo 'a^TsnTcuT ,tery uo.r,;:;a1u1-r,r saqcu! B spoacxa TT€Jxr"r JairuIns roqo+co o1 '(-{ueqTY 5}se^{-q+nos uT sTf€J uT€r eq+ ;:o lred .ra1ee.r8 eqJ - Z|. uoTFaU pu€ - uoT8a6 ;o.;: s,fa,t.mg cT+€I!.TTc .raa1! ri;euua 6 or{+ o+ ra^TU d11arruo6 eq1 9l. ) 'se9ire6 rtroJJ qlnos aq+ uo pu€ €aJ? .raa16 1a.re8,rery aq1 3u11.re6 eq1 uo +s€oc 'tcoJ pa+€coT ar€ (saqcur CE - 6) -{1tsua1u1 untn:lxBu Jo lsaqcuT Ot spaacxa 'rOC6 1no,.r1jo uo-!+nqTr+s-!p Jo €aJ? oq+ ra^o Tfe.]uf"r l"nuuy Molaq pa+"coT ar€ s{rreaJ+saq1 -(11ens1 '+q8Taq sTq+ a^oq? asTJ spaqsJa+€ra-(ue q1g pu€ dJ?cS 9u11..req aq1 u-g slead auos q8noqlle apn+T+T€ |OOOI.o^oq? poq€ '+s€oc -coT efl? sll€aJ]s T€TuuaJed Jo saqc+aJ+s aq+ Jo auoN aq+ Jo saTTu qe Ot uTq+Tr,\eJ€ srlear+s Jaq?o sTTrint+s?oc eq+ uoJJ soT-lln 06 +no sT "aJ€ looMlic€Tq aUL. qC Ut1l ;t sapn+!1,.T uaaM+aqaTT sltrcaJ+saq'l fTV a"' e+€nTTC(c) ',{ue qTv Jo +s€a lsnf suea.rls 11etus -{,ra,r qltu .raq1a3o1 -{ueq1g 1e saTJ€+nq-IJ+ pu€ sJa^IU ue8a41 pue 'ecuel.zodlllJ 'r{TprTq+ 'sualsds 3u-Dj ar{+ a.re u-! +s€aT pue puy Ja^TU uaJr€1l pur- ,fllarruoq 'poo.u1ce1g ar{} 3.-re a.raq1 ,{lpuocag 'suals-{s .:arl1g ,fe'r"reg pue -{e;.m1q 'aulluadJas aq+ u1 f,aa.reg pu€ r{+Jed uaaid+aq sJncco sueaJ+s +noJ+ '(Z Jo uoT+€rluacuoc +saT^€aq aqJ aTq€I pue t d€W) 1no..r13u-tu1e1uoc (soTr€lnqTJ1 pue s.ra,r1.r) sral-€,l l. ad,{1 go s€aJ€ uTeu aaJq+ axe aJaqf,l '(L a1e14 aes) s;a18ue o1 uo1 -+cEJ++€ Jaqlor.rE sT auTTaJoqs aq+ reau uolleie8aa pauirloJp aq1 ur 3u1pao.; qsTJ Jo .,{1ta11ce aqJ 'tlsTJ Sutno;8-1se; Jo {co+s +uaTlacxa u€ papr^ord 's.rea-{ s€q ILe( €uooJ€1t pa111;:-d1,rlau aq1 o,{!+ +sET aq1 u1 -{ge1tu-rg . (ra+€t aos) ,uo1s ,{1aa11e1al st uou qsTJ aq+ .;:o qp,ro.r8 aq1 9u1u s1.;t JoJ +noJ+ Jo sJeqmnu '1e.zeua9 alenbap suTe+uoc IT-F+s )iooJ€ angol qgnoqllg uT sJa+€lt +noJ+ Jo ar\T+€c-!puTsE,\1 ueo 4oo.rg an3o1 1eq1 uolssa.rdur ar{+ pauTeS aJoJ€Jaq+ aH .+noJ+ aFJ€T Sulcnpo:d pu€ uo-t+-Fstrer+s-Iq+ Jo saFels .{1.rea aq+ uf s€rl ueo >{ooJg an3o1 "y',q pa+TsT^ sTocu€Jd 'J( uaq,\{E96l al 'sauTT.,Joqs oq+ 3uo1e slre1d 1ua8.raua Jo q+MoJB eq+ ,i\oTT" +ou s aop ir/vlop,lr€JpT€ntrue aq; .I€TJe+€in llrpTd ar{+ ;:o acue,readdesTp oq+ o+ anp suos€as T€Ja^as Ja+JP 'sTJqap +noJ+ Jo a1e.r qluo.r8 uT as€aJcop e .{lqeltaaur sT aJaq; }u€Td SuTsoduocap aq+ uo pes€q suT€qo pooJ a+€Jqa+ra^uT Jo tllroJ aq+ uT +noJ+ JoJ pooJ +uepunqe o+ speaT T€Tra+€E +IreTd tETJ+saJ..:a1 .1o 8u1u,lto.zp aq1 '3'a) (L96v ut u'e( €uoor€t! Pn n& uT uBq {oorg anSo'J sTtTJ +srTJ ad.{+ 'uunlne 'TTnJ sTrll Jo uep € uar.1!\.Ja?€i4 JoJ spuanep Jalnnns 01 enp o+ aJE (guTrds -{aq1 uaqu pu€ Je+uTrlr ttroJJ Ta^eT Ja+e.n uT do.rp -(1.ree.{ a3.re1 -{.rarr € sT araqJ . orrlr+ +sJrJ aL{+JoJ Sultt'F.l .ra1;:e s.rea-{ iral +sJTJ aq1 Surtnp prre ,{lleuoseas qloq saSueqc euar+xa o+ +caCqns sT uep Jo 3d.q sTrlJ TABLE J AREAS, ANNUA],D ISCHARGES, AND MINIMUM SUMMERI'I,OWS 0r. SOUTH14EST STREAMS ' per 1 acr.-foot = 41r5ta cubic feet Cusecs = crrbic feet second ANNUA], DISCHARGE AREA MIN]MUMI'],01{ ACIE 3'NIT Stream Square &ate for 1962 Mi-Ie s GUSECS AV!XAGE TOe1962 Dwel-lirigup 3r. nast o.15 141 136 0.004 Dwellingup 3r. North o..3o t+28 U+8 Balingup Br. o;12 163 0 Bol-gaaup Dan 228 6,9 0 ),o.r Tr:rtle Br. 9e3 0.10 7-7-7 Li-nebuxner Cr. 2.24 W a.t2 Joshua Cr. 1.9 821+ 510 0 Bolganup Cr. 3J1 86 0 Scabby GuJ-ly 4.48 1128 11112 0.09 Logue Br. .rZ'7 11430 1t+3@ t+.6 Davies Br. 16,6 8722 +t 10 Gooralong Br. 19.5 7990 @78 0.04- Joshua Cr. 22 38\5 0 t 'r a-t Yarragil Br. 9 3t+]8 0 Gingin Br. J9 7782 I))o Ihonson Br. t$ 8184 969 0 Ferguson R. 45 18o4O 13700 0 Brulswick R. trD 2959 0.,+ Wongong 3r. 51 21620 17760 o.37 North Da"ndaluP R. @ 273trD lB5tp o.5 L,efroy Br. 120 51190 50440 +.5 Capel R. 12.7 41310 372@ I o (d.an) Harvey R. 1tio 1l+110 89@ South Danda-lup R. 19 268\0 26110 1.0 0 Harris R. 155 39m 19910 0 Wooraloo R. 166 16200 169m WiJgaxup R. 168 28720 __:.^ 0 Margaret R. 1BO ,t>rJ-) ,+53o u Calining R. zOO 19100 175(p !dan/ heston R. 23O 51880 52920 R. 251 4aJoo 12990 u \aam/ Cof,lie aR Kent R. 27' 59300 58fo Donnelly R. 300 138100 11.5 Wanen R. 1\30 2673Oo 226300 19.6 Fran-klard R. 152O jD19o BB7@ 1.0 Murray R. 2720 urono 1321oo 13.6 1l+. l "61 (t aTq€J uo Pes€q) . +noJ+ JoJ,(1111qe11ns o+ uoT+€TaJ u-T ScT+sTJo+c€J?qc UreaJis 't '3-r,[ gz-7tNlAvno? V]AV J-N]WHJ-LV) ooo, !aolJ ta e1gvttogNn swwvlg o sYrgun Nta-lN|YU oJ. rN,l"q,t9 dvrnbt| btttytytalX = toe lLnou- ,Nt Attc2 lo tlgytYt gwvtrvlg @ lnout ,tuAtNYc shtvttltg a S Ir o :Z' o*D o o \ *-_ o Cr C-l) rn+>.\ O9 \* .5 H; o ac) .€ n q.€: t a ,/. O1 TABI,E 4 lIATER TB{PIRILTIJRESFROM D]RK AND McKNOnBR00K 0VER TIIE PERTCDDECflIBER 10, 1958 to JANIIARY2+, 1969. IY.MXR.TSEERATTTRX (oC) STREAM PI.,ACE Ilaxi.roun DIRK BROOK HE,ADITATER 15.Oo GORGE )'t . ) 15.0o ^^ ^o PI,AINS z6.u 15.Oo MoKNOI BR00K HEADIIATER 20.oo &.50 GORGE 23.Oo .rt. no ^, -o PIAlNS .+. ) 15.Oo 15" 0'Bt 9 . trwJotruf J Uv :7 uv E ruvmgluf a Lt Y tJ} t x00us grrl\I E o'zL :7 av r00ts flrs suosduour'\ o'Lr 6'zz Z \/a8lTJq .. * 'tg rou,{ET o'51 a 2c L \"*/'a8rnJq s.rretnrco.:ql .T NEITEVI{ fiNfiINI'T IlWrrvirl (c^) uunwuarw,rusov.& (co6'8) ,{ozt ,{oruutrNrr{ . y 0J (r^l'tf)-w ,[^58-sunJvuudEr,flo"ru]I/\Ilrvft ri[or,{ 6riNw No,rusrEld (,{^) urv 'rEJSrs NE&ryfi flfi lu 595tr 'BZ trf,vougu.{of 81.rwntss,{ cOrusd sHJ UUAOS SrlOffugdl6f UUJVA 9 srsvi E'+t, o"6z (peou UTBW) r00us douvflYq J Zv E'zz (.U uerrer[ o+ esoT3) x00us Nusufi o'9, 9'92 1e8m.rq suosduou,r'\ I00Es .f,ou,{sT IUDIINI!'I ( co) uunuvuuluur usfiYll (c^o'5) s^gti ,{o luu[rNrolv or (coE'tt) dolor".{Ownydxv\I v nou,{@riNvlr Noruf,s}I[d w f,tm[vusdrr'tfi,IEJY ']Ioouri dowirlvc qNVIOOUS NStrUJ 'I00Eg -f,OUrm'I l,[ (595t 'zz trEvnNVfor 'gg6L '51-uuflwcsc) S$tl0fiftlUflmf UEJYII E],{ftOS ?-dtdffi Daily maximum air teuperatures exceed 1OO"tr'occasionally dr.rring slxn,ner, the frequenr:y of occurrence increasing to the north and east. The areas of the South-west where streams contain trout are ttrose r.,-. irri-otha fnshost ralr,fa-Il ad I owest sunner air tcmpcraturcs; Lhc determining frctorsof l arid forn axe a-ltitude a.nd ,listance from the coast in the path oi the prevailing oceariic airstreams from the west. (a) Ilow of Streams. The maxjroumflows of streams in the South-west occur during winter. In contrast to the winter floods the summerffows of these streams (those considered worth netering by the.Public Works Department with a view to future or present water storage) are extremely low (Table 1! extracted fron "Hydrologicaf Dat:r to tire 1962 Water Year"). The arrrual discharge of these stre.a;ns is linearly related to catcb-ment area. Streams l-ocated above tlie trend line are more likely to maintain a srnaff flow dlLrinp suflner and be suitabfe for trout than those below the trend (ris.i). (") Water temperatures. fn stre rms subj'ct.d to high sunmnr daJ,'LjmF air tempcr -,t-rres trout r-rre much more likely to survive if thcre are deep pools where temperaturc stratification, with depth, is sufficierrt to mairrtain favoruable temper- atures. Large turbulent ffows wifl not pernit stratification. Al-1 that is required is a smafl flow (or a s,;fficiently large d-eep pool with flow absent) to naintain the pool deptir. Temperatures betweerr about 2i to iOoC rrc-vebeen found to be lethaJ- to treut in S.A., dependlng on the duration of erposu.res (several hor'rs at 28" and z ar.rhour aL fi" ) and the water tenperature s pre'riously experienced. Tabfe L shows the extremes of summcr water temperature fourd il small tributaries of the Serpentirre Rlver and Samsons Brook. These streams con- tain s eff -susti.iinilg populations of trout (see lrter). They flow through thc most favoirrable arcas of the DarliriS Si:'.r'p :urd i,n the Darlirrg Rarge X[c1{noes Brook is very rvel1 sha,1edby ji"ra}r i'orest whil e Dirk Brook also has tree shad.e afor€ its fer€th (Plates 2 ancl J). Ext:ept orL the plains, poofs are too slralfo,r to pcrnjt temp r i, ]r, strotjrjcalior- (a minilrrm of It i" tt"""""rty). Thc period of mc::.surcment of wtrter tempcri.itures irrclnld several dt{y's whcn the n;rxinlm ai.r tcnperature lrr Perth rc i.|che(i 1O9-!'. Theso heat-wevcs ere ref lectcd il tltc rni,>:imlmlvater t,lmpcr atr-rrr:s rvhif e thc rnirri.matr(l re.rched ovcrniSht durirrg cool periods. .A "61 JnoT^€r{eq s1q;, 's9ul.rds gr" sureaJ+s T6ens q+Ti Ja^TJ aq+ Jo socuanTlroc aq+ o;Ja'I +e aleSa;8r.roc o+ ?a^rosqo uaoq al€q Jo^TU uaJJe1\ aq+ uT +noJ+ '(19)^9'gt '(,5)^1'gl '(rt)^B'et '(,6) '(uo++oq- Gilq\'Bv ^./, .t -\ '." ,, ') '(acejffs)o1'l-Z '1d ^.renrqaduO ot r<, v .Jo]\Tt rraJr€.li\ aq+ uT Jncco so.m1e.radua1 Jauuns T?q+aT +€q+ t{oqs TTTM dua >looJg '{o'r.;:a'1 go uos-g'reduoo y 9 aTqef o+ 6 aTq€f uoJJ s aJn+"Ja + oe..!Jo uT paJJncco -soJ +saroJ TJJ?>I asuop e q8no.rql pafioTJ +T s€ >{oo.1g3Tg aq+ € s a.rn1e.radua1 +sanoT '(9 alqe; .ra.rr.1.ruT€u oq+ o+ fre+nqrJ+ acrnos ) t6961 uoJJ a.rn+€Jadua+ Ja+€M rrr as€aJcuT oq+ iaoqs .rarnuns a1e1 u1 po1'rad JaTooc € Sut.rnp ualsifg uaJJ€llrt oq+ ur sa.mle.radua+ Japrh Jo spJocog . (n[o++oq pre '(r9)^5'6t'(,t)^o'oz '('€) - ,zt\^6'61 ^L'zz'(,2) ^68'zz'(,.v)392 ^s.q)1(9i"ior") c^do'i? :"o1;)' ifisrrs e'q+im'1oodddep e"\rr 6961 .f,.renYqaguo .u.d q1'q \e sa.m1e.radua1 re+€^a SuTnoIToJ aI{+ potllol{s uoT+€c}JT '(uo11n11od -+?J+s aJn+€Jadual .;:o +uenaJns€al{ +Tes o+ anp 3u1qs1;:-o;r1co1e JoJ a^T+cng-roc oo+ s?.[/!.ra1e,raeq1) airrlatre.f,q 1no.r1 a8.re1 s ecnpo'rd u'uo1 '1oo.rg -a8p1.rg +E ro^Td pootDlceTg aq1 3:o.r(.re1nq1J+ TIPus e dn"r€8Te( .8u1dund a^Tssecxa .,fq paddols sT r{oTJ 3q+ uaq-f.l (L9-9961 Jo oJe soTlTT€+Jo[ sseu '.lalano11 '(E a+?Td) ;ramns ) Jncoo o+ u.rr^orDI +noJ+ ,3:ouo11e-indod agJ?l e 6.ra1e1 aes ) pamoqs 8u1qs1J-or+oeIo TnI? +sa,'l!-q+nos aq+ uT sueeJ+s 1no.r{ lsalooc aq+ Jo auo -f,1qeqo.rd sT >iooJg uoaJ; . (+l a+€Td) sJauuts +soltr 'a^oq€ aues Srrlrnp {ooJg .f,o.r.3:e.1aq1 uT pa^Jasqo eJe sq+€op l?aH se ?oTJad aq1 8u-r.rnp €aJ€ uo+Jequed eq+ JoJ sa"m1e.:adua1 Ja+en slroqs E alq?[ 'raql€ai,,t 10q 8u1.rnp s'poTJod +rogs JoJ 8utdund.,{q pedclols sT i'roTJ ar{+ uar{il {ooJg }iJ[O uo Jau$o prreT ar{+ -f,q 'raumns 'os 'sa+€II4Tc qcEs usAs ,f11ensn a.re qsTJ leap ua-6.g JaTOOCuT AJOql AsTa r{sTj Tr€q+ .,t1geo11aua3 3sa.m1e.radua1 Jo+€11 altroJ+xa o+ acue-+sTsar .raq31q e tlno;1 p"aot"lt"p areq '"y'11 uT ?a+€TosT aq1 +eq+ snoT '!qo '{1'r1e,3: s1 11 .{ooJB )1JTCu} sam+sJodna+ '€aJe .ra+€^{ Jalimns oseq+ pa^T-&1rts +noJ} +?q+ ?a^{oqs ft1qs1.1i-o.r1ceTg sTq+ u1 suollelndod gulcnpotda:-JTes +saq aq+ Jo auo s€q {ooJg {JTO eTTI{n4 tdrecg 8u1Feq aq+ uT ltrear+s +saTooc aq1 r(1qeqo.rd sT {oo.Ig s aoTDlclil r -]r-V\-/LATERAL PROFILES VERTICALPROFI MEANOERSON TITE 'n P(NLs'Lort FLows )n,, n\rv rrrupsnnrrn E srwT,F,cer*,r,t SUMMERSURFACE WATER UNFAVOURA6LE WA|ER .. TEMPERATUqES FOR TAVOURABLe TRouT 3rg. 2. Dia€ramatic 8u.Brtr€rf,r of the generaf physicar characteristics of strea4s" 20 '(8 n+€Td) .rf\oTJ riloT Jo sa0T+ 3u1.rnp 1no.:1 .f,.r.rec qclqu s100d daap e^€q suesJ+s aq+ +€q+ os ,t11e:a1e1 Jo pBa+suT "f,11ect1.rea po+ra^T? aq o+ spue+ sJa^TJ '(1 'Ja^TU asaq+ Jo .:a,v,od 8u1po.re aqI puB 9 sa+€Td) SuTuueO eq+ uo uo{€+ sqde.rSoloqd uT u$oqs a;re med.rls e 8u1uap1ra Jo s+Tnsal 3q+ Jo sTduexa TrV t.{1;e1nc11led . a+Tra+€T ace,;:ms qlpa ,trlmoc q9norq+ uo13 f' ) laae.r8 +ueptmqe sa8u66 3u11.re6 aq1 u1 'suee.r+S 'Ta^Br8 TT€us Jo uoT+Tsodap +TmJad +ou sao? n'loTJ Jo+uT-t'rJo qsnJ pa+€J+uecuoc aq+ aJaqfi sueaJ+s noJJeu u-T s+TnsaJ loTJ /r^oT Jo suosees 8u1.rnp uo11e1a3ea 4ueq Jo +uafiqceorcuo aqtl .[oTJ Jalrmns -tao1,Lrerr e q11,t" "TnJT+uaTd srrreaJ+sJo cT+sTJa+ceJ?qc sT uoT'iTploc sr-q;, +ou sT osT€ TaAerF 'suTer SuTurueds saTrB+nqTr+ asaq+ q[ 'saTre+nqTJ? TT€ns o+uT dn +sJTJ 'a1e..r81m aq+ q+Tj^ +snu qsTJ aq+ pue saT+TTTOeJ 9u1u.meds ou a^€r{ smeor+s .ra8.re1 aq;, .pi;.r.Teez naN Jo €TuEItrseJ rrg su"aJ+s u1 luas a.rd lale;r8 Sulu,vLeds 1;:i Jo saqc€al p51ua1d aq+ 3^€q +ou op +sarl-qlnos aq+ sllleoJ+s +noJJ . s oT+TT-To"J 8u-tu,taedg (J) 'z '8-TJ uT 'pazTJeuuns eJe 6cT+STJa+C?J€qcasaqJ '+noJ+ a.rreq .{eu qcTqfi saTJe+nq}J+ aseq+ fTuo sT +I '+uapaca+rre a.;re osle e8.:o8 aq+ uT Jo su1e1d aq1 uo sJa.tlTJ 3r{+ u-Toq q crqil saTJ€lnqTJ+ JaTTEUS .uoT+cas o8Jo3 aq+ uT Jncco.r(aq1 .rarrl.r ar{+ uT IT€ raTTrll'[ tsaqceal 1e luesa.rd aJe lnoJl JT Jaddn JT 3q+ u-T +noJ+ a^€q SJ3^TJ esaq+ Jo auoN .suTeTd aq+ o+uo 1no Buluado a8aoS eq1 uT .rrrcco s^loTJ 'seftreX +saq pue lualpre.r9 lsadeals aq; SuTTreq aq1 q8nolql ?Jen +s au SuTi oTJ srrearls uT aTqeacT+ou .{1.re1nc11.red 8T sTqJ 'sar{oeal aTppTu JTaq+ tsJoITJ uT s.moco ts.rale,nlreaq eq+ L! SuTJJncco Jo Itea+su-T asaql ,;:o e9e1s tsmea.rls tue.r:eg ptre ,,Tng{+no.f,, +sou aT{+ sT +Eq+ +uapoca+ue ele rfTTouuo( t pooru:1ce1g ',te.r.m1q aq+ 3 '3'a '1s e1tr-q1nog eq? uT sJo^TJ a8.re1 aq6, /.rrr[1 G.2L /'xeu] ('nz 8ut..rds \'/n-"_\1.l-": ra^Tu ('uTu) ;O'Bt ('xeu)-oo'Ez "695L , LZ ,(.rerurqago+ €Z rtr".rltxe| ?oTrad eq+ uT apeu aJa-u suosT;eduoc a.rn1e;arIuol SuTi[oTToJeq1 3;ra1eu 8u1'rds ,;o ato1,;; -uT ar.l+ u-t 3u1if1 pa^Jes qo aJail qsTJ a8.reT .frrem aJaqjl Jor'Tll uoJJ€1 oq+ uo lods euo 1y ..rt11arruoqJe$oT aq+ s€ qJns suleaJ+s e8.ra1 .raq1o uT sJncco osTe TABI,E 7 REFERENCESON TIIE ABIJI{DANCE TROUT E],SEWIIERE Data from New ZeaLand given by Allen, K.R. (lgSl) tyu Horokiwi Stream N.Z. Marine Department, Fisheries Bul-l_etin No.10 Sngl-ers Size-U-mit of 11" (27.9 cns), fl-y fishing only, avera€e of 10 ye a.rs data. catch (takeable ) per hour o.61 avera€e size O.91 ].bs. 12f, inches) t- )z cms. ) fi rurd.ersized. fish EEF I Sanpl-ins t total populat i"on !b/ acre = 237 Allen quotes the foll-owing figures for density of trout in streans Ln the U.S.A. -- - -- / New Hampsh:ire )r. / rh/ aETe Michigan 1.\ - 96.9 New York 13.8 CaLifornia nnfished. 214 - 434 fished. )1O - 1\6 Data fron Eastern Austratia given by L,ake, J.S. (lg|il. Trout populations and.habitats in N.S.W. Aust. Jour. Mar'. Freshw. Res. g, (t*), t+14- 49 Arrqlers Size f imit of 12", single season cree] census 6/o of creel censuses returned = J Group 1 Group 2 9"oY! J . ( warn water lcoJn waler h.gh growth rate) poor growth rate) Nunber of takeable fish caught per hour o.17 o.25 o.3e Avera6e size of takeab]e fish (lbs. ) 2 tt/t5 1 11h6 tilt6 22" 'uotpas€5ro9 :)ool8 s,loN)rw z lrvld 'sj€t6ue,ol rslpa aqt ol ssarte Ise. a'{+aloN outr6u:rdr aql :wvo ur uorrets6a^Pa6raurqns ra^o 6ursrnr>ar€ qrrq,ttqe9 6!'tu or 6u"15lJAll vNoolvM I .Vld rI I II PLATE3 DIRK8ROOK. co.ee Seciion. LEFROYBROOK: Samplinss€ I 'uo!r)as 5u'tdueS ')OOdS NlldI l s lrvld l PTATE7 CANNING RIVER,A stretchof ltream below thar piclured in plate 6. The.e is no spawn. ing gravel and rhe river is compar.tively narrow, deep and rap:d in flow. PLATE8 SOUTH DANDALUP RIVER:Springtime flows in the deep pool in the fore-sroundand rapidsin the backeround.Note rhe heavily overgrown banks. IF- 'ez .ofie/sqT 6LL - Brr ,{+Tsuap - ELlI 569 a1-ru.rad qs;g JO Joclrtrnu .sueaJ+s +noJ+ TT€us ojn+ ruTTdmes sorlcuT z. I I qsTJ Jo q19ua1 ueanr o.€ r{ep .rad r{srJ aTq€a{e+ Jo roqrtrnu e8e,ra]ry IE6L _ E\6L .sra^Tu ,,5 +TUTTazTS +"""_q+"oN__ sJaTFuv 6E - 6l :(l) % .sad .nqsard ..r€Irl.rnof .+sny uo33e6 1sa4-q1roN oq+ .;o ,t;eqs rg eq6 11 ,t:aqs1g +noJf u€Tu€ttrs€f arlJ (BE5t) 'e'y sTIoqcTN ](q ua,|!T8errreurs€ J ltroJJ ?+€q erse/sqI g9 -+r? ?rr€luo l (ZE5t) qcTrr€Je+S arae/sql oifFI r.rpSTr{cEt(6e6L) ttezzell pue ra++aqs erc€ - 'sueaJls /sqT OOe O +noJ+ JoJ egwt ,(e6.0651_) *apuel.reg salonb arcB/sqI €6 _ ZE.{11suaq ue1 s,{g .raalg )tsg q+roN @Tdto-s ." ."o*.""{t""; !n:; fq uoriT8 eTu€rtrs?[ uorJ €+€O .A - 99 6tL - +O . tLt-+t\ (eroe /qL) f+Tsucp Jr.rrTdrrPs 5'oL -- Z.LOZ LrTl pezTsreprm % r- Data fxom Tasroania given by NicholJ-s A"G., (1958) The Tasmanian Trout l5.shery JII The Rivers of the North arrd. East Aust. Jor:r. Mar. Freshw. Res. !r(2): 167-19O Anglers South Xsk River Systen (1O years data) Average number of fish per d.ay 2.4 - 4.1 Avera€e m:rnber of fish per a.ngler per season 13.9 - 56.8 Average size of fish 11.7 - 15.6'l North Esk River Systen (10 years clata) number of fish per clay 1.8 - /.O number of fish per argler per season l+.O - 7J.2 Average size of fish 10.7 - 12.2" ( size lj-mit 9" ) Data from New Zeal-ancl 6iven by AJ-Ien, K.R. alid Cr:ln ingham B.T. (1957 ) N.Z. Ar€ljrg 1947 - 52 Resul-ts of the Diary Scheme. Anglers Range for various d-istricts flotrrs fished per alay 2.15 - l+.ltO Number of fish per bow O.J9 - O.97 Fish per argler per season 1l+.7 - 69.0 Number of fish per d.ay (trip) 1.2 - 3.6 Data from Frost, It.E. & Brown, M.E. (1967), fhe Tlout, CoL1ins, Lordon. Density of trout in streams Two small. streams flowing into lake Bllesmere, Tasnarria 4O - 135 Lb/ anre Ilalla Brook, Dartmoor 5 - 20 Thego River, IGnya 1l+O Sagana River, Kenya 2OO. Kiringa Riv.rKenya fished. 36t Kirirga Riv.rKenya unfisheil 129 24. s+ueToTJJooCuoTssaJFau pe+€TncT€C j. VN LOV sl/\IvqusHJo \ld WVq VNOOUYil zzY 9L", SMEdJnSIUJ Lz9 *26 <) SdSTUU JnoH Jad - ({r"r) paqsTg uaar+s ;io ^?q Jad p€r{sTd ra+€ll SRI€tr JO JAqENN sJnoII Jo JaqunN (") VJYCX00S eoT tryzruwuj|Ios E"E-mi III ABUNDANCE /-l A-^r ^*^ I ^ ^+^L^ ^ la€{qf D \ 4/ A l-og book system was used during the 1)6-l -68 fishi_ng season to provide data on the success of anglirg. In August, 1967, 94 log-books were distributed to anglers and a request for the returri of the books was made in l:tl,ay1968. Iogbooks were mairly sent to the arglers ( about /0) who ,rcre enthusiastjc enough to attend the inaugrll lrecti-€ of the W.A. Trout ard Freshwater ArglinE Association in early Al€ust, 1967. No logbooks were returned in 2/ cases, logbooks with i.rrarlequate duta, or replies to the effect that no fistring had been done, were received in 2l cases, and p books with usabl-e d.ata were recelved.. There were 15 fogbooks from anglers living in Perth, 16 from the country towns south of Perth down to Harvey, / frorn the Penberton-Brid-g etown ar.ea and 4 frora AJ.bany. The forn of the log-book sheets is shown as Appendix I. Thc raw data were su0ma-r'izcd by a couputer prograrrme. qrrmm-riznrj T,, n,,f thn vqlrro< nf n,.l,.h nor nil ,.Pf^,tvrw i. ^,^n-h ! }/rvPvr naFsnp.l.ira r-forah^as ^n tnc abrDdancc of trout i'as mo:s rro,l hnihuv Lrr hvv.y angling and research sanpling) have beerL extracted from the literatur.e and presented in Table /. W.A. log book data have been surnrnari.zedfor. "rivers" ( stro:m order .-- ilowing onto thc plains) "Lributarjes" (strcam ordcr I or greater), WaroonrDam and "ol,hnr darns". (taOte 8, (1) - (c)). the places providing d"ata are indicated in Table 2 by a value for the highest catch per miJe (str,'ams) or hour (dan) of i,akeabfe f-ish (greatcr than 12" fork length). Twenty " tributariesrr a.rx1.14 "rivers" were fished by arglers returning log-books. Alglcrs fishcd for '1.B hout's per day (or_trip) on sm'rLl streals arrd for 2.8 hours on rivers, covering about i to j of a nile, (Tcble Brla)). It shoul-d however be pointed out that alglers fish nost streams here in a hlghly selective nanner because of the overgrown nature of the balks ard the occurence of fish usuafly onLy ih the deeper pools. Thc strear ls not waded ald thoroughly fisherl. Fron past experi.c.nce, the angJ.er moves rapidly from one pool to another vrithout fishing the intervcnilg sha-lfow water (this is gcr-rerally not possiblt:). Alglers were requested- +^ - ^^-a +1-. t, ..,.+L ^c ^+- - ou^^l,,^r'l uu4rJ Thc proportion of Brown trout to Rainbow trout capture,L was Iow, heina nichor in smql l <*n. rmc ilr',n in .-,.,-.i". -. /T-r\--Jlc o, lD, rnl l|'rl/. Brown trout have not becn sto:ked in strr:ams il recerit yoars; the Pcmbcr- ton Hatchery considers th.'t Rainbolvs are e.lsicr to raisc. ?6. . L(, .r.rpau 3r-{+ Jo JoJJa pJ€pLrE+s asolJua sosaqluored .rod uor1e1 ( ot 'o) ot?'8 (e'L)*'Lt (9r' a)1tr'6 (Et'o)os'ot .ra18ue qsg.; .;o 1q3146 9Bv LLL 'BZ tQt (sqT) uo{€+ qs1,1 j.q8ton 1e1o5 rad ('do'o)\z'I ea'o)io't ( ro'o) 50't (zo'o)st't ( drr+ ) ,(eP qsTJ oTq€o>{€+'oN (te'o)zt'zr $o'o)69'z a1lu;rod r{sTJ alq€a>i€+ 'oN r ^.^ \ +rt. l- .moq :ad / Ln. n\tq' n rw v I | | - (to'o) 09'o (to'o) 9q'o qsrJ 3Tq€o{e+ Jo 'oN 0'0 :rauulds pir€ +T€q pue ,11;i 0'0 0'0 ;auulds ,.rarrulds E.aL 8'98 E.zE q'oe +T€q 9'zL ,'\ ?-- +l' I I\ LJ % 3"+,I"1I Jo ?oq+aul a- MoqITeJ tv o t7a 1\tuoJq % 'tt'9t z.gr pazlsaaq]r. % ,L v no qrrT€d 61 (rJg 0! o It Ul\ Ja+€,![ o+ paTrJn+eJ +nor+ pezTs T€8aT-qnS ,VL i oquT.?u u&oJg L uelp+ +noJ+ pezTs-T€8eT s-mog BZ SuTqsTJ luads sdfJ+ Jo ro qunN JaqunN ZZ sJaTSuV Jo SWV( SUglLlu ss3Y1d ,{0 sfldr,r u]oJ l[r ssH3w3 (NV iNIHSI'{ UO'{ YJVC IOOS i0l UH,I lTY '{O IUWWOS (?,+uoc I srsffi ) TABIA I (Corrt rd.) SUMMARYO!' I,OG BOOK DATA TOR FIS}I]NG AND CATCI1ES]N FOI]R TYPES OF'PIACES US]NG TIIE MORE succESSFULTRrPS YrrrDlNG 5@ Ol',m,r-, lrsn TAKEN (") RIWRS TRIBU]ARIXS IVAROONA OIHEn- L{M DAMS : Nr:mber of Anglers 1o 13 7 9 -ttr Nlrmber of triPs 28 14 llor:rs spent f ishi-ng 59.1 68.8 8L.o 18.5 Legal-sized- trout t aken 2 Bronn 6 14 0 Rainbow 69 62 183 55 Sub-legal- sizeal tror E returnecl 0 Bronn 0 1 o Rainb ow It fi 27 1 20.o 12.9 10.9 /o und-er sized' 11+.8 4q 0 1 f Bro"4,/R"iob ow 7 Method of fisinirrg % fry o.o o.o 0.0 10"o 28.6 0.o bait A+.1 spjxner +l.o 89.3 jlme]r 0.o 0.o o.o fty antt sP 0.o baj-t antl spiJmer ,l+.8 o.o No. takeable fish per hour 1.62(0.06 1.18(o.o5) l.ol(o.10) 1.13@_.09) No. takeable fish 5.01(0.19 fi.15(1.61) per mile No. ta.keabfe fish [email protected]) per d"aY ( triP ) 5"o0(0.15 3.62(0.o1) [email protected]) Total weight _of fish taken (lb s) 157.8 152.8 356.6 98.1 rlVei"ght of f ish 15.18 11.75 10.90 (o.56) (o.LJ) (6.\2) (0.5i*) parentheses encl-ose stald-ard' error of mear' 23. .62 6q'\ e't qo'e 6.2 ca.r 68.0 (sqT) +t{8T4.& €z lz 6L Lr 5r eL (seqouT) r{+8ue.I uoTsJa^uoc lqtTei A+9ueI s anle,|! 0'0 5'o o'o o.rlz veLI+ Ja+€3rfl 0'0 E'z 6'z 6'€z - o'zz 0'0 \'€ 2"6 E'r, 6'Lz- o'oz - z'Ll a :1v c.), 6.6' o.8r - o ov l'gtl z'oz 5'Lz 6.Lr o.9L t.Lz o'\z L.EZ o'92 6'Er- o'11 .t'11 - :YY 6.9 z' Le 6'er o'z,L f s alrcTrr ) dooui $wq twc SfruV.MSIUJ SUSlrIt TUHfrO vNoOw.rl I{'IiNfi (p) SSSVTd .{O SSdIJ UOOJINI foOuf stsvTDIVJ,{0 sNoTtflgru,rsrqszrs % uo,{ YtVa xoos flor ilo rEvfiIllns (t,1uoc1I trIsvI TABLE 8 (cont td.) SUMMARYOF IOG BOOK DATA I'OR SPRING, SI]MMERAND AUTUMN fN FOUR TYPES OF PIACN RNTERS TRIBI]IARIES ITAROONA OITIIR DAM DAMS SPRNVG 1 r ) :n,-r-,^- ^+ ar€fers 21 25 14 1'7 (2) Days fished. qa q2 6)+ I (J) Nunber otr take- ql'l a fi ch nar day (trip) 1.36(0.o2) 1.26(0.o1) 3.69(o.ot+)1.92(o"o3) SIIMIIMR (r) 1t+ 'r1 6 3 12) a2 23 7 7 t3) 't.93(o.u+) 2.57lo .19 ) 2.86(0.18) AUTUM{ .rZ (r) 9 1i 11 (2) 2'l 2.1 I 58 1.t+3(o.o5) j.44(o.ol ) 1.39(o.oo) 30" .tt .saTJaqsrJ az-ls e8?Je^€ aqtr Jeq+o JoJ palonb sen 1e^ aq+ u€q+.req8rq,(1qe -^ rr.?r.T ^^rD r-^D ^;-^. - ^-^--J -* D! Y-tJ./u q+rvel usaLr *cqlwr! .lnoJ+ uT sqT C +noqe s€M s.ra18ue oqq ,tq ua:-e1 Jo azls e8e.zane aq;, .,,seTJ€+nqTJ+truT wQl 'aTlu ,.sJaATJ,,uT aJcE.rad.ra.uol qrnu sr qslJ a1q€a)l€.]Jo f+TsLep au+ Jed 'uaq+ ?aJ€ oc€JJns JeTT€rns€ a^€q sueaJ+s JaTTeus acuTs acuaJaJJTp I"aJ € o+€cTpuT o+ ua)i€+ aJe aTTrtr.red saqclec aq+ JI .sJa^rJ .ra3,re1 uo ueql ssoT ser'dsureoJ+s JaTIeus uo Jnoq ..rad peqstg: ocue+sTp aqJ .,rsaTJ€+nqTrl ,, ,! r1/i rr-r r ^,.n rrFm rrr9nor /'rrrn < o:r eL!4 *ou L,r-J o4!* . ,,-- rJ€.lnolJl ,r pJE LSJaATJI LT r^-- r\n arr9nor - r^T+rr ^,,. ,,q-^,,^ ffi Y-ld.}UdLi+t,to|Lut,t+Lv '((") 'A a1qetr) se1e"r-qo1ec 6Ja^anou 3s.:a13ue .ra8.,re1.{1qe1ce;dde erle8 >1ooq3o1 -,fq ue1e1 qsTJ TT€ qc]u,v tlsJaT8u€ t nonr .dr.rr -^ -To- o/rtr lapTarf- - ru1 -To ;erro +s'L! rL 40rp bu !4+ c4rI' .. or o/aI /-- -- .sonT€^| 'saceld ;:o saddl Jor{+o sq} T.req+sa+€r qclec ;eq8rq .fdr-r1 .3u1qs1;: papg,to"rduie O EuooJel1,{ .ro).fep.,red pu" irr€er+sJo eT}u.rad ..zT^ 'paz1.rru Jo .r. orl Jed pefi+d€c r.lsTJ aTq€e{e+ Jo Jeqmnu a8e.raae aq? .(c) .g -ums uB('i a^€rTc+€r l.{c+€cJo sed-{1 ee.:q1 pu€ (a) a1qeg,u1 .spoq+au SuTqsTJ JTor{+ uT palec11.c glidosrrrr f1arr.11c.reduDc eJ€ s Ja18u€ erl] +eq+ uoT+e 'aut1a.-tous -cTpuT u€ sr aq1 9uo1e ,rasTJ' r.{sfJ pr-req1,,rro.:3"raprm "fq papadur-r 'neq 1ou s_r Fu11sec aaeq,r €uooJeg uo Surqsg;: ,f1;: go luroue TT"ms aqlL ..,ftTeT+Tul ra?s€rtr o+ SuTr{sTJ +noJ+ Jo poq+au +TncTJJTp +son eq1 sr Surqsr,;i .,{1g .suea,r1s ut s Sood daep aFJeT aq1 Furqsrg JoJ poll+au a1e1.rdo;dde 'soo€Id 's'r +sou eq+ +sorn uT ?u1rru1ds 1no..r1-{q -{11111ce ?utpaag ac€JJns JO >{C€T Ere SltreeJ+s er{+ JO eJn+€u urvro.r3.:e,toaq+ Jo asnEcag . PuFrulds sel,t sd3..r1 , s.-ra13ue ,;:o .f1r.ro leu aq+ uo pasn 3rn1 8ue 3o enbrllqca1 aq;, '((q)'e aTq?fr) qc+"c aq+ Jo qh Sulsg.rduoc i{srJ eTq€a{€+ uT pe+Inser a1e..rqluo;F q31q aq1 e.raq,u1r€( EuooJ€r\d+" +dacxa ezts sTq€a{€+ Jo oJaM pe.rnldec qsrJ T€+o+ ar{+ Jo e/z +no qv s-FI+ JoJ s auc+€c ,,:ro"r"" r!4eLoq6 *" .+..r-.p-*J ua+Jo +noJ+ no quT€J (s,uoqur€J q1!rl uo1111aduoo u-T aJe .(aq+ uoqu sureaJ+s a+€{r.ntrop.{11n,;:ssdccns 1no.:1 uno.rq) sJaqtmu iirur 4vr4oq?^r r-.I-^ n;r,u .roq1a3o1-^..^ ^a^- luasa.rd aJe qs-TJ go selcads o&+ aq+ .snpp .1no.r1 uoqM ur E.r€ sJe^-FJ u-r slood daap e8rel ur .(1,re1n cz1-red noq -rn€J r.req+ r{c}ec o+ +TncTJJ-lp arorrr qc tr aJe +noJ+ u,uo"rg .sua1s,(s .(eareg pT.€ ua;J€14 aT{+ uT +srxe +noJ+ u.roJq ;:o suollelndod Fur cnpoJdeJ-JTaS =$ * r-< !si .: I x5d & e3I s'ri t I .i 9Lr,o t-1-l r r5. ?,. Length d.istributions from samples from tlams ard streans. t:, . -t 'tt 'srrr€aJ+s >IcoJg s a r{.orD{c1,iJJo sJa+€&peaq a+oual aq+ rrr pa.mldec aJa,[r qsTJ oN r{+oq uo sTT€Jra+€.&rJo asnecaq sJa+€.,,^p€aq aq1 o1 se8ao8 aq+ uoJJ u€sr+sdrl ar\ou +ouuec qsTg .ueeJ+s +noJ+ +uaTTacxa u€ aq o+ {ooJg seorqJc1rllsJapTsuoa .s.reerf -{ueu JoJ €aJe oq+ uT sueeJ+s paqsTJ pue pa{co+s s€r{ oqu 6?uoo,r€.& .;:o a!\rreg ..r1! .sJaumo -{1..zedo.rdau1 .{q s,fep asa l+ pr'}lFmred s1 3u1qs1;i ou .q1.re6 .reau sueaJ+s +noJ+ TT€Es +saq aq+ Jo euo aq o+ paJep1suoo sT >IooJc, '{ooJg JauLroJ eq+ qftroq11y.d1redo.rd a1el1.rd q9noJq+ rmJ >1JTCJo sJo+cas su1e1d pue aF.ro8 aq6 .suT"Td oq+ uo pu€ 'a3.ro8 aq1 ur 'sJo+€rr^p€aqaq+ u-! 'dJ€cS '>1oo.16 peqsTJ qc€o aJa^{ 8rr-TtJ€O aq1 u1 saorryor{ ?u€ r{ooJg {JT( .anbruqcal Fu tTdlr€s ar{+ o+ aTqT -ssacc€ aJa,, r{cTqr! srrr€eJ+sJo saqc+aJ+s puTJ o+ s€.&l.IJom sTq+ uT uaTqoJd .Ja+€L Jol.€mV JeaTc aq+ ur eff,ldec adeJsd o+ uaas aJa[,4qs13 me.;.{.rar- 'sarnr+ r{1qFno"roq1 (a,:a,vr pTrE I€Ja,tas ua1.;o ,,f.ra,,r pJqsIJ Srust;:-o;r1ca1g .7 .uun+n€ pire Jarntrns Sufmp sueaJ+s 3ut.,r,ro1,;ur 6r{+ uoJJ urap {ooJqs o{€.16 pr.re -{aa.rei1 o+u-! ur{op e-rou "{eu +noJ+ +€q+ saqc+€c 9ur13ire DoJJ acuapl^6 arlos sT aJeqJ, .( f; a8ed) flsnolae.rd pduTETdxd suos€al JoJ ur€p aq1 ;:o e8e eq+ o+ pa+eTal aJe (e.3rg) pa.rnldec qsr.; Jo sazTs pue (( alaeJ) sa+€J qc+€C .ece1d qcea u1 .f,eq e Jo eurfeJolls eq.I ItroJJ +no pa18ue a"ran s+au arlJ .saqrEoJdd€ al-ar+q8Tu s€ sntep ur s-{eq olur .eJJq+ .,(1a-pcog alrou +noJJ lnoJl Jo slJodeJ .{re ueaq Jenau a,req a.rcq1 ,= arTToO aq+ ,tq s 3u11"za8ur; pue f.rJ q+T,!rg+oq r66L a.1+ FuT.rn? prlToo+s .esneceq ,,{1a.rrrsue1xeLreaq p€q +T +eq+ +c€J erl} o+Tdsep pa pnlcxe ser'r u-e6 uo1Fu111afr\ .L96, Jaqua^oN Srn.rnp pe11au arar suep uor1e81.rrr x-gg . 8uT++alt. t ffid:utu( 1q) .8rrysrJ .unornl .uoqm +noJ+ o+ s.rauut8aq ere s1 11 .;:o -(rreu s..ra13r-:e s+ceJ++e rrreo€uooJeM sE qJns Je+€r\ paT-lslJ .,{11see ,re (.(11c11onC talqeactlou q11,u) aroq ,{1J€Tncr+red sr +T . aTc!€Tr€,re 3ut13ue jo ,{glenb aq+ o+ uoT+€TsJ uT id.eJ a.le .smea;1s aTqTssacc€uT -{1q31q aq1 a.roldxe o1 .q1.re6 .secuelslp pire seceld AulqsTJ o1 uo"r; .{1.re1n c-p 1"ru d 3uo1 ,t1a,lr1e -.reduo c Terr€J+ o+ q8noua cglsegsnq+ue oJE oqi sJaTBue Jo Jaqtmu aqf r,.su"p Jaq+o,, eq+ +€ Jarrmns ur lsaq8rq +nq ue6 €uooJe4 +€ uTtrn+n€pu€ Surrds Furflp reqFrT{ ara^a sa+€r r{c+€C .((n) .g a1qeg,) Sur.rds arT+uT auoT sen 9u1qs1,g: a.rou qgnoqlle .Jalmrns u1 rhiu-.rxeu e pue qgrq are s,'roTJ uequ 8u1..rds eq1 Srrc"mp 1sa.tro1 eJa-M,saTxB+nqTJ+ pu" sJa^TJ JoJ sa+€J qc+€C .o+nqTJ.+uoc osle ,teu s{3o+s +noJ+ uo 3utqs1,3: Jo +unoue 11eus eq1 q9no -q+Te +noJ+ er{} Jo sa+€J q+,v.oJ8+uaTtacxe aq+ Jo uor+coTJal e .{11sou s1 i:r State jaffah forests (Tabfe t0). The highe st densities of fish of al-l- sizes were in the gor6e sections ntrich have previousfy been described as the nost suitable sections of strearns for trout. Takeabl-e fish were how- ever more numexous on the plai-ns where the largest, d.eepest pools occr:r. Both brooks c ontained- stretches of spa nfu€ gravel ard fish a6e O+ were prevalent p artic ularly il the g orge section (I'r€. l) (age O+ refers to fish in their first year of lifeJ. Sour streams were sampl-et! near Pemberton. carey Brook is used' by mature fish as a spanrixg strean but these fish have moved. donnstream by sunner; mostl-y O+ fi-sh were captured.. The section of Eagt brook sanpJ-eil incfud.etl the pool- where one of the first trout planted :a 1911 was cap- tured. in 1916 at 11il-b3. The stream has sjnce d-eteri-orateal clue to faruirrg practices and- now has a poor flow j:r sumer. No O+ fish were captuzed. 5rl lefroy 3rook. there is no spawning Srave1 in the Brooki the bed is sand. anrl nud. Recruitment nust c@e fron the snafl tributaries fi:rther up- stream. A spanni-ng run of :-arge oature trout occu.rs each year with the first rain ln the Brook. The lefroy Ile ir at Penberton (clownstream frorn the sanpLed- section) prevents firrther movement upstrea.m of marty fish to sp awni-ng tributaries. Treen Brook Save the hjghest nmber per nil-e artd weight per a,cre of trout of the streams sanpled. The brook Save a lower catJtr rite for anglers tha.n other streams near Penberton. The only fish- abl-e soction of the Brook is, in contrast to the rest of the stream, d"evoid. of correr fo? approaching anglers altl it contails mostly wa.r5r Brown trout. Brown trout have not been stocked in Pemberton strearns for sorne years but the waters contain predoninartly Brown trout although Rairbow trout have been heavily stockeal in recent years. In surmazlr, the best streans which were sampled. i-n llestern Australia had. weights of fish per acxe that were j-n the lower raage of vaJ-ues for trout witers elsewhere jn the worild. Ilowever these values were J-argely d.ue to the presence of large fish. The clensities of fish (numbers per rnile ) were reJ-atively l-ow. The streans are lightly fishecl by a relatively smalL number of arglers who, however, are highly efficient and successful as shonn by the log-book sunmaries. J. Scal-e samPling SanpJ-es of scafes from trout were availabfe, both from fi-sh recoraled in arigli-n€ l€-books and frm fish taken by electro-fishing. The scal-es were " re€dI to deternine the ages of the fish and the lengths at various charges 5,n growth irr li-fe befor€ capt'rre. Trout i.rr c old. temperate c1i-rnates show arr annulus on their scaLes i-n each year of life. Growth is faster in spring, sumrner and autr:rnn (the circuii on the sca-tes axe widel-y spaced.) ancl slower in wi-nter( ci_rcuLi are cl-osely spacert) when mature fish also show a spawning nark of very cJ-osely spaced. cjrcu:Li. fn warner c fi-mate s the agi,ng of trout is often conplicated. by the fornation of add itiona.l- checks alue to unfavourablE I jt+. .€TT?J+SnV UT SUep l[AU pu? SUIeSJ+SJamtrns 'sa1eu-t1c uI;reil T"uT8.rertr Jeq+o JoJ eSe.raae 1no qe q3noq11e .rapToc u-'I t.rarr.gg +noJ+ o+ paJ€dmoc T?uoT+dacxe oq plno.& rlooJg dnJ€8Te q pue -dlletruoq 'ueg euoo.re16JoJ sa+€J qym.:8 aq;, 'se+€o-TTc a+?Jedme+ Jeploc uT sIIIeeJls elqe,reduoc uT sa+€J qgTr{ s? pepJe9al aq pTno$ asaql qFnoqll€ sa+el I{+-doJF '(l.L +sairoT oq+ err13 srloo.rq Tleus aqf eTq€[) oTqTssod se saceld ,{ueu se "c1a u-T .;o sq13ua1 a8e,:ale elqeqo;d a+€TncT€c o+ ?asn uaaq erleq +noJ+ '(r{sTJ 'fsaT€eeJ u3 s33e pautedstm nlal ? Jo acuesald) speuoS ,;:o uor +Tlnroc tsuo11nq1.r1s1p d.rnleuu-t ) s>IJem .r.rad uo.r.;: q18ua1 moJJ acuapTla 9u11.roddns prnl su"re11ed aT€cs Jo s ad.f1 asaql Jo scuaTJadxo snoyra.rd € Ja^alrcH 'Y'.ll ..{1u1e1'rac .;:o ea.r8ap qBTq e q+T" uT saT?cs rTar{+ uo,r;: 1no.r1 a8e o+ eTqTssodu! s1 11 Aulldues -f1q1uou.;:o ame.rSo.rd .(q13ua1 € +nor{+Til! 'v's Ir'E 1no.r1 8u1uo:8 +s€J JoJ suoT?Tpuoc Ja+ei[-[Lr?i J€TTu-rs Ja?un sJncco osT" .(11.m1eu .{1.rea s1q1 Em a8e 3;o s.rea,{ Z uaqr arnl€u lC.raqcleg uo+Jaquad ' qcTTIl uo 3u1u.ueds mo.r,;: ar{+ +€ +noJ[ aJn+€Itr +ou eJeil r{sTJ ($Iceqc'dn qspgullslp o+ +InoTJJT? a.:e qclqu) $IceT{c g o1 ue1.;o T{+TII T{+,uor8 .3:osu.ra11ed cT+"'zra pa[oqs +sa$-q+nos ar{+ uT +noJ+ Jo soT?cs or{J . oJn+qtr uoqil snTftrue (auTuil€ds ) J3+Ir.ri[ ? uoqs -(1ro ' pu€ raluTir SuTrnp TTajr uotS 1no.r1 uoT+Tp?E rlt peu.roJ aq TTTid.s{oaqc 's+€+Tq€r{ t,*vDDevuor,^^^^^^- ^-,,^+e.r+ 6^-Tq€Jno^€Fm oJe suoT+T?uoo Jalrulns aJar{1 'JaIImns 1eu13.reu Jo a..!T+€cTpuT aJoJeJaq+ sT +I uT suoT+Tpuoc Je+€ . ulr€il 4ARTTI O CATCH R{TNS I'ROM NEfTING ]N RRIGTTION DAMS NAIIE 0I' DtM HOUXSNETTD NI]}[BER OI' CATCH X.{IE TROJ] NETTND NUIAER PER HoUR Sti-rling lo (2 nishts) ,l o.o3 Harvey Jo (2 ni€hts ) 1 o"o3 Logue Brook 15 (1 ni8ht) 53 Samsons 15 (r nisht ) 24 1,5 rr t/a -;-r.+\ Drakesbrook t) \t 'L!6!tu t o o Iilaroona 5 (atter sunset) 7.r Nets used: 84 yards of 2".mesh, JJZ yarns of 2f;' mesh, and [6 yards of 3]" nesh. Average depth of net /8'r. r (r.60r)Tetr (r'29) L'9zt 1.80'O c89 x00ug NstruI (o'vE)E'Ee ( ) .q+7\c.)6 69 x00us .trou,ryI (B'tE) t'"7 G:e) e'*e 960'o OLE ffi-Effi (o) 6'g (o) 1'61 662'o @E ffiffiffi5 (B'zL)z'Lz (1.8)z.6e Ezf o or9 SNIIId (r.L) L.8z (1.1v)6.zLz gzf O 591 sJu0t (o) o (o) o 6z0'o er usm,tGwH 1i00ug fioliDlc]rl (z"t\) 5'+t1l (\'/i.) E'LoL zLz'o @L sNIwd ('7'92) z'ttE (?'ez) 9'LEE 6L'o 6E siu0e (B'oz) E'ez (L.Et) 8.Eer @0'o 6e usJVl,lGVu{ fr6Ed-ffi (s.rflvDrvr)(sffi) (oravom) ( srucv) (rusn) sttcv uf,d HSr,{ mr{ u&I GIHSr,{ ([HSI.{ ,t0 fHtrs[ IST,{ iIO Us8n0N vuttv Ifiil\XflI TIVTIUfiS ENII{ST.{-OETCSIS NOT,{ SIWRT.IS SIIOS NT HSr,[ ,{0 trSNVCNOSV,{0 SSdVItrSfi ot trIEVe TABIE .11 AiEXSGE LM.IGTHS ( mlCHES) OF TROUT nI VARTOUS STAGNS OI' GROUTH llfaroona Dam 9.3 11.2 18.3 15.4 in spring and 16.7 in Autllnn. 2+; 19.4 in sprins ) Logue Brook Da.ro 5.o 11.9 Samsons Dam 5.1+ .1'r C Donnelly River 5.1 9.o 12.9 16.9 19.9 22.8 Di-rk Srook ).4 9.9 15.O Mcl{noes Brook 8.8 10.9 Treen Brook ,.o 10.1 L,efroy Brook zt. 1.1 42 4 15.9 Dalgarup Brook 6.)+ 9.5 1+.8 17.2 19.7 20.1 SU, - Iength at the end. of first sr:rmer (0+) SU, - length at the end. of second sunner (1+) R - 1en6th when the early wilter ilcrease jl fl-ow of strearns and rise i-n ].evel- of dams cornmerlnosr 2, 3, 4 - lengths at the conpl et ion of sp awni-ng durilg winter. . a/' o: .sirrEp u I pe{co+s eq pTnoqs +noJ+ rroquTeg -{1ug ..f11uatc1,1;:a pe3erreu JT pooJ gre 1.rods +uoT1acxa apg,rord 'uoJ.reu 'aJaqM Lrec +noJ.l 01 paJJaJeJJ aJ€ lnoJ'] Jr s a3ue.r aq1 uT silrcp nJeJ o+ ual13 eq plnoqs ..{1tct1qnd aJol{ .pazTcr1qnd prr€ pe{co+s aq T,Tnoqs -' palcadxa aq deu qcruul suep .[taN .suap a8"reT uT +noJ+ Jo s1co1s 8l1u1e+uT€u o+ pr€d eq p1noqs uoT+ue++€ JeTncT+Jed .pa1ec11s1qdos erortr auocaq s.ra19ue pu€ sas€aJcuT e"rnssa.:d SuTqsTJ s€ sllreaJ+s roTT€us aq+ uT pa)ico+s aq pTnoqs +noJ+ uji^oJg 'qsTJ Jo sJaqlnnu eq+ uT€+uT?u o+ penuT+uoc aq ptnoqs srrr€aJ+s go Srrrxcols trTnFaU SNOI.IYON$]4IWC3gU A .qsTJ Jo -.(lgsreds aq1 .ro.y s.re13ue a+€suaduoc ,tlalenbape o+ sJ€edd€ pam+d€c aJe qcrq,u I{sTJ '.reaauog .+JoJJo Jo azTs e9e.:eae +uaTTacxe aq1 SuTqsTJ Jo +Tun .rad pa-m1 ,T-^ ,,^T i.J,T dv 4v1q,,4 -.1+ sT pasn sT i{ cTq.&uoTJa+TJc 3q+ JT TnJssaccnsun flle.reua8 se peSpne aq u€c €TI?J+sny uJa+se.d!rrT uoT+€zT+€rrrtc€ +noJI (c) 'r{sTJ .s+casuT TT€us ?ou prre TT€ms pr.Te€ace+snJc Jo s+aT? ';ale.,,.roq ( uo +noJ+ r(q pauzelle aJp aJaq,vlesTa pu€ €JT€J+snV uT +noJ+ Jo sa+"J qltro.r9 lsaq eq; .1ua1e.ta.rd os +ou eJE srrreeJ+s +noJ+ uT pimoJ 3qs'FJ slcesuT cllenbe ;io sed-{1 T€nsn aq+ +nq a^T+€u Tt?trF pue (spodtqdue 'saT8TT8 'uo..r.reu) ptr" sdmrqs €oc?+snJc Jo suoT+eTndod lueprmqe +roddns srrleaJ+s ai{J .pooJ Jo ric€T Jo esn€caq TnJssoconsun aJ€ +sa&-q+nos oq+ n_T+noJ+ 1eq1 slsaqloMq e l.roddns o+ TTe +€ acuaprla ou sT aJaqJ .ua{€+ qsTJ Jo ez)s '.:alarr,roq 'oql,t aq1 ut .f,1.re1ncT+J€d TnJssaccns -f,1aa11e1a: a.re s.:a 19tre Jo Je qmnu TT"rtrs € .{q paqsr;i trt+qtt eJe slreeJ+s +Eq+ a+€cTprr! saT"reu -wrs looq-8o1 pue -,f13muuoc SuTqsTJ aq1 ;:o a8paluolDi v .,r\oT -{1ea11e1a.r .q8Tlt ere^i (aTTm.rad s.raqunu) qsTJ Jo saT+Tsuep oqJ ,,f1alr1e-reduoc a.re se1e.r q{.tro.:8 acuTs qsTJ ( ef q"n tr+ ) a3.re1 ,3:oacuasa.:d aq+ o+ anp .,{te9r€T oJoJ{ sanr€r\ osaqf .aJar{,MasTa sJa+€.t JoJ sanT€... ;:o aftre.r JeeloT aq+ u'! aJe^.rqcTq-&i eJc€ Jed qsTJ Jo s 1q8-'rau peq paldues smeaJ+s +saq aqf . a oTr€pTmqy(q) .srmarls Jql ur TnJ"r+ua1d 1ou .Jarmns s1 1e.ne.r8 Suru[€ds u1 sa.mle.radtro+ Je]€r{ prre Jo}",,!r Jo +unotre aq1 -{q pa1c1..r1sal sT uals,ts ue a..r1s r{c€a urq+T.r^ pire €aJe +seiLq+nos pue .suoT+Tpuoc aq+ ,ra^o +nor+ Jo ( acl-replmq€ aroJaJaq+ ) uo11nqg.r1stg Jeuruns o+ anp +noJ+ JoJ T?uTEJEltrs€ ?ass€Tc eq +snltr sJncco qsTJ ar{+ oJeql| suBaJ+s aq1 .;o ,fue4 .+noJ+ JoJ aTq€+Tnsun aJe +s3,r-q+nos eq+ u.r sasJnoc-Je+€.r^ ;o sqq8ual plre Jeqrtrnu a3.re1 -f11ua;redd€ oq+ Jo +sort .uotanorJlsrn /€) ,. '. . .- \ / SNOTSOl CNOS qNV IWI{IiIOS II vr RXF'ERENCES Cli:natic Surveys, w.A. (1955) Region 16 - South west. ( 1962) P:egion 12 - AfbarJr. Comonwealth Bureau of lfeterolqgr, Mefbourne. tr'rancois, D.D.(1966) Report on lfest .Austra-1j.anFreshwater Fisheries. Report IIf, Department of Fisheries a.redFauna, ll.A. HydroJ-ogical Data to lhe 1962 lfater Year. Publ-ic Works lepartnent, 1[.A. Hobbs, D.tr'.(19it7) Natural- Reproduction of Trout in New zea.l-and.. N.Z. Marine Deparfuent, i9eJJ-i-ngton. Jenli-ns, C.I.H. (195'l-51) ttre tooa of trout in WesterT}Australia. Ilest Austral-ian Naturalist llg-'tt*l. 2. , ^-_\ _ !ake, J.S. (1957l Trout populations and habitats in N.S.W. Aust. Jor:r. Mar:. Freshw. Res. S (l), 411+-+P Nicholls, A.G. (1958) The population of a trout stream and the survi-va.]- of rel-e ased. fish" - eust. lour. ltar. fresnw. % (il z 319 39 Pemberton-Itarren Trout Accl-imatization io"i.ty. Annual Reports, 1943 - 1961. I ty')" I I . l+l .luaw;.redaq saTraqsTd eq+ o+ {ooq 3oT er{+ Jo uJn+er ar1+ roJ .rza.f, lxau Jo ,(eW uT no.rf o1 lues oq TTpr edolaaue pessarpl'E padue+s V .S.d tu3r,{,{0 H9uYssf,rl 6(rtssTffoft.ft.N) 'sau-TT+q8-rl .u3q+ TT+unos ^ .JaTrLre +noJ+ uaa{ ? osTe [re J s? .real( qxeu aq1 8u_tanp EeoJ+s aq+ uo no.rf leau o1 edoq 1 .dTJ+ Str.rqsTJ r(re^o .re1Jre ,f1e1e.mcce qc+ec Jrto]f pJocar o+ qJoJJa ]f.:eaa aryeu asea14 .{ooq 3oT 8uTl{rreduocae aq+ +ues uaeq al?q no.t( uosee.r sTT{+ .rod .uoan pepTcop 3luauaao.rdra-r 6'[T0-5 s{co+s +no.r+.;:o pue . a cueuelrrreu .re a,f ..c1e .s+TutT o1 .reaf 8u1*msua lnre 8eq ?rm ezls .suosees pesolc SuTu.re^o8 suolqeln8e.r ftrTE-.rETcoJd :fc;1od 1e1c1,3:Jo Tre saqc+€o mo,{ .;:o e8peluorq +noq+-rt[ .Eq--r-qTETn-6:tTltd ..ra1gue qe se 'norf o1 u"m+oJ aT{+ Jo sltr^ro+rrr sJnol?opTra eser{+ Jo asr,{aJoq+o Jo tssecong aq+ Jo a+€uT+sa ue se.rlnber lCT+uaB,m +ueuuJelol eq& .?TT3J+snY uJa+sajl Jo sJo+€fi,TTT+s Fr€ stllear+s aq+ uF s.re e,f 66 .:eao .ecg.zamq JoJ ?onsrnd uaeq eeq q+JoN uo4 +nor+ .u.oqrrF€Usq+ ?ue cqsTJ-euefl adomg uo4 +noJ+ ru org aq+ aq+ Jo ftry1co1s eqJ, '.ze19uy.reeg '195f 'l +snany ?TT?J+snV ll.ra+setrl .q1;ra4 . ace.:.raf e?T€Topy got tNov,{ qw ssrm {st,{ ,{0 fiM Wf,\rdSC r )gclwddv o Z ^l 'fl.l --tsl ,-i .l XI Hl =l Url PJI 2l ,il HI Ei ':t 5i \2. + (, d O P.u. cio F!@ p o P. r Oo Fi55 opr oo !05 o Fb' o o cio Fl FJ cf_ ct@ cto ct 5'o p tso H FJ t p.ro E;jr-: bHbx @!Dcl' E o PE iTH cr- lJ. F P O C cl 500rr P.o o o Gl clFbd O O 0r +Fl \o oo F P Fc|. FJ F.Cb o o 0qt, oH@ ooct (Dt, N 50 pd @c|.!0(D ^. Fl=H lFEP Fl Ptd r, FJ. 4'r t<.E"H $=68, PbBO b= (D Ocl. F Cf aao H'o5 ioe E o 38, tBp B6'qe ooBtf ct p. p2H.Q pli ts o oo0iO r- cf sFcr - ctc t po B 0ro oIl (Dop 44. ct Fb 0t S P O\ \n +-\NrsJ ii4 E F ts. OOFJ t @F O Fb o orE o cl-Pct|-tl H E @5ts.P.ts O5 ooE5(D 5(D $ (Doq p cr glr: e FJ *g'.E gH FJfD- a, Fd 5 o lcu - lit oFJ (D HS) rJ @ F I.-b ao (D ctP. (D ct o o Ee I cr- | o !r'5 .t 5 (D 4 D lo o I |,.'ic $ 0q F.hFr(Dlo tJo (D cl-ri cto o t-,.ts.l=