Appendix 2 Data Set for Cape Gannet Morus
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The copyright of this thesis vests in the author. No quotation from it or information derived from it is to be published without full acknowledgementTown of the source. The thesis is to be used for private study or non- commercial research purposes only. Cape Published by the Universityof of Cape Town (UCT) in terms of the non-exclusive license granted to UCT by the author. University BREEDING PRODUCTION OF CAPE GANNETS Morus capensis AT MALGAS ISLAND, 2002103 Linda Staverees This thesis is presented for the dl'gree- of MASTER OF SCIENCE in the Ot>par1ment of Statistical Scieo~, Avian DemographyTown Unit, Faculty of Science, UNIVERSITY OF CAPE TOWN Cape of February 2006 Supervison: Prof. L.G. Underhill Avian Demography Unit UniversityDepartment of Statistical Sciences University of Cape Town Rondebosch.7701 South AIi'lea Prof. R.J.M. Crawford Branch Marine aod Coastal Management Dcpartment of Environmental Affairs and Tourism Private Bag X2 Rogg"baai. BOl2 South Africa "" II"",," .... " " II" II. II II II" II II" II"" II"" "II II """"""" II""""" II II II""""" ••• " ••• " ••• " •• "." •• ,," •• " """.,," ..... ...... I A.cllul(lll'!rlle«llg;elmeI1l1:S." " "." •• II"" II." • ..... " •• ".,,""" iii"." iii. II".""" "" II. II II II"""" iii II""""" ". II iii"" II. iii II •• .... "•• iii 1 "." II II.""""".""""." "". II". II" II""""""""".". II""" iii""""""""". II"""" ....... " .... 1 success 3 Town 1 Cape .Pp4~DdIX 1 of University UI'lIl1Il,ets IIRn ...,,, rnlnpI'J.\'u~ at an ImW(lUC:tlCm two patlers are a was 1 Townentrance to ..,<n ........ua over Cape of at 1 1 et im/estiRak:d .." ... .,.T... '~ .. OJJ, ""........ Uj'l'i s·uc(;es:s. as ..... <><.. ,,, .... rI as University ...... ".... "" success is it cmcKS were tntluence~d to ... ".uua~ ... .,;."'.,..... ·t" ''''n .... '''' clammsis is ........ 'ul1rn was most season was not gaIllizatioflS, as oallenlce. as Town Cape of University Town Cape of Chapter Introduction University 1 Chi:lDtc~r 1: llULV..... U.' .... vu Lrc~ta(~eous. more et Town Cape"" ..."y, .... ., seven SDflCU'S of University seven SPf~U'S ""''"''"'''''''1 is sOlrne:tlnles nwmea ."~ ... ", .. ,,,tAhl as ropo,su;'a ""''''''11''''' on to own 1 ChaPter 1: lntrodUlCUC)ll is connorants verrucosus, H.IL''''''''II''''U'U'"' Town Cape of are is University 1-'''' .........'''.''', connorants a across teI1nD(~ra1te zones, as as 2 '"''''<IV'''''. 1: lntJroauctlOn SUI)-}Ultar<;tlc zones. COIm()raJnts occur I ________ .} on n-rr""n,n rates elic~itblrmc~s is resemble one an<)m€~r Town some cases, Cape of It is University relaltea to 3 cn:aptc~r 1: llun........... ' .. vu momns,to two at coasts is loc,ate:Q resc~mt)les an eIOlt12atea. Town was ap):Irm{imlatel} 2 Cape is an()tnc;,rof 1.5 men scrape:d University anaUumlIlg most at .. "'u.... u ..,'" et 4 ·h"'.... -t"" .. 1: mtl~OaUCllOn is are ... u ...~ ...... 1 m ofisihorc. c<)nnlect(~ create Town UU.,""'''' to Cape a restaurant. of gmmetswere University is Slnlate~d east is locate:d at ... ""l"I"h,....... entrance IS an is 5 ....,IJl""..,',,,,,,, 1: 9m sea ."...... ""'" are to are across amounts to Town .....,.... "' ..... "' .. QUJ,"" cause Cape Ph,nlr.'.... l"'n ....'ll";1',.. coronatus IJvl" ..........of' ..... u. University a ore eXI()ott. a to 6 near cause po1ten1tial .....u...... i!;'" ..... '........... water was most ... ""l"I"h."..l" garmets were rpr,n-r1tprl bre:eding on bre:edmg at MIJlfC11S Town Cape cm an of a University commonest VSlIMSll'11' outer te~ltnlers is 7 cnlaoterl:'n~~r'n~hn,n is a mIIOmllatlon on coverts are as mateTown Cape on of some mates su~~ge:ste:d recent assessments University was no 8 ChaPter 1: IntrOQUlctU)ll to "".", ... " ... ...... .., ... UllJO<. on ...,"'" ...... L'" to oc(~upan(~" was as .nn'"H~'-" in Town Cape of at sea a to University season are ll...... U ... ~• ."l". or m can ....g·U11"1,O V,l .... V ......,lJO<. ..,'V'V'IU,",., one 9 sunset return to ..,~"~ ...... u not on sea sur1ac:e encounter .~ .. _.~.~ or cease stolma(~l1 contents Town as two Cape of on rec:or(lea to occur 1 liannets move moreUniversity on 1 1 "."......... " were more 4 to 6 to UUl.UaU Dn~dation. lil3lIlDlets were return to br(:edinl! '-'Vj'VUi."'" 3 IS not ",h,.,,,,~,,, were --------..1 Town Cape of to LallUU',,1 movements were University 11 Chapter 1: 1ntrc)duc~tion Grumets are nrs:t-Vlear mean elapse:d was to seven west coast was unlikely to a pos:t-Uedgjng olsJ)ers:aJ recent are now to ore:Vl()uS nOI:th'lIIm"d movementTown seems to mar'ked to entc;:rtaJin were toll. owing a Cape of most ImJJOrtant fealture Gannets brecooirlg hlibitat is res1tricltion to nature Colonic;:s p()ssess flImw,avs. to University Uannets are caplible brecooirlg on sloI,ing ....nl"nrl as on Mercwry is clelU'ly excepttomll. more garme1:s, are are cOllspicUIOu:sly aUi:j''';UL is conside:rable vlU'ialtion nest at varlaille deltlsi1ties even on same ."'."....... NOlnn:al sJ)acmg on Mallgas is metre cm is as man- was OCC:UPled .. ..,LA,""". llllllJI..:;uunl:a Hn,.... "'''.vet nest ..... "" .... '" on cement as a nest on n""ua.. Was Town is success is ....." .... "', ... Cape one area out area of it is ...... ,......... .t" ..~t C0I1CO]mitant em,cts on University oeipeIlOS on a nest be(x)Dles wet it is scarce, to or out 1: JntroauLctl(m nest nests are to OOltltU1UCIUS gannet movement w. .... ,,, ...,, ... as as nests to ..........mln ... T''''.''' """,..... ,"'''' .... to nest as or extreme SCllI'CltV to a '..... ".. rt.".,.<1 et urumets return to on Town are to ore:eQltng Cape over vacant were of............. ,,,.. to """' .... A.A!."" at not vacate to move .. ..,.""u·n centre eS1RD:IlSJUng a """,nu,,.!". is University a waves "-'uu,.. "''''. 1: intrO(ll.lLCtl(m are monOI,!anlOU lOIlIIl-1Lenm ~'--'''~J to mates not is a soon be(~ol1nes ""-',......... two same U"".UIJIII<. on .......... u .....u et Town Pf'::Cllntaltes a Cape mCllba1tlOn to broo(llng. U"' ...".JlUUl15 is mass isof one it renlaU1S .u.. "",,,, .. it lJe(~Ol1nes a ..."', .....,", ....... to Universitya mCluttl-tcl-mloU1th II:LSnJon, more. It -~--",1 to it is nest. (letJlen(ls on It is not uncommon '-'U"'P<',,",L 1: lntl~0C11uctLon some cases one ...""·", ... 'h,, is so it is to one are to to can bec:omte to Townto Cape of to ------....1 eat "'V.lUUUniversity ....L"' ...... as or to or et Chapter 1: lntr'OOtlctH)ll "'L"""V'U ...' ....... LU.... ' ... some as rllli' .... "U et Umme'lS are susceUiU to n ..., ........ occ:::urrea at LU"",.,''''' Town .....:u .... '" were mC:OI'1:>OI'att~ vaoo,ets were one ......,,", ... .1 at gaJl1nc;:t bJreediIllg ..." ...... ,...... ..,. Cape of commencement to construct University were some to mm cOlrnoare:d 31 mm at was Town ChaDter 1: Cape of University notes on ....,.. ''''I-'''' .... A 1: intJroductlon Town Cape of University Town Cape of University Town Chanter 1: lntrodulctI<m Cape of University a 1: a "' ....J.,,,, .......' ..... latlduc1mal zone. is on et Phaetontidae Pelecanidae Sulidae Phalacro- lI>. ,,,",, An"":' ":.1, Total .1..:. s) icans) '['..annas '" ' . , coracldae (I:ri;;;bkds ) ~uanersJ- and (0 boobies) Arctic 3 3 Sub-Arctic 2 6 8 ( 45 "N-67"N) North T rlne -r 4 1 11 2 18 Zone (23 "N-45°N) North TropiCS Town 3 5 5 8 4 2 27 (O"-23"N) South lroPICS 3 5 7 12 5 2 34 (O"-23·S) South ......l ... _ ........ y 3 3 Cape16 2 24 Zone (23·S-45·S) Sub-Antarctic 1 of 17 1 19 ( 45'S-67'S) Antarctic 1 1 University (nO-pter 1: introduc[ion N~rc"'1 ~,;,~ {., La",;"" ~"'''' Town F igun.' 1: rhe brecding di slribulion of the Cape Gannct Cape - '.'- . ' ',' of - '.' : -' .. - -' - - - .. ' - ---. - -:- - . University ... :.'-- - ::- o -.- . .. .. _.:- . Figure 2: The e ntran~" to Saldanha Bay, showing the positions of t1uee of the five Saldanha Bay islands 23 Chapter I: Introduction ~ • ;00 0- ~ ---.l--B.. '''"'''', '-""'_'.01' ~ ,~ --,- ,.'" w~ " '00 w "• >z 0 '" 0" 0 '00 •0 x ---- ------ w -- 0 Town z " 0 -- ,- ",ro 1970 "'" CapeDECADE Figure 3: Relative population trends of Southof African (0p"n symbols) and Namibian (solid symbols) Cape Gannet colonies by decades since the 1950s (RJM CrawJord, Marine and Coastal /l,ianagemenL lmpublishcd data), "1 he trcnd for the total population is depicted by the broken line. University 24 Chapter 2 Factors influencing the breeding success of Cape Gannets Morus capensis at Malgas Island, 2002/03 Town Cape of University bre~ed:1D2 success bre:ed:1D2 season at LV"""!':.'''''' .. ,,.w,,,,,,, bte~edlD2 success at nests was mcmlt:or€::d were estlmate:d to Town nests . ...........JI'. .., .... two "'Ul'''' ......,. lj,reeamlg success was Cape of bre:edlD2 success, University same season et most 1l00UUC=:S are a tm::edmg success mean to over as as to some nn.",-u Dre:edimg success In(~1'p~<;1E'<;1 et to mate et et Town on Drc:::edmg success Cape of "110111101"1" nest loc:atllOn, mass was not "n,,,,,u;,,,, University U\,iUJI<.J,.. /lC: success some cases, decre:asllIlg severe storm at bre:edlLnlZ success .... E>15'.""~.uE> a re(lUc:ea ""'''''.. n,ri,,,.'!-n,''' relaUon:snlp .....,.",,,"''''.'''' blreedmllZ success on UU,'........ llO:; season. It attlempte:d to success was nests extent nn,l"I"t,,,,,..... Town entrance to u .........."'" .... Cape of or to ascl~rtain V\;rnetner University was deternnined, banaea as Cnl(~KS. """''''''lI'; season pr()£!fess·ea, more were on a OJ.... ·"" .... " ..,.:; success nest was marrKt::O or was ''''''''''''',u retUITleO to nest. was £LU',",cu..1 v D:!mCleo a was not DatlOeiil, was pUlce:o Town "'''''.'''''''',.''' .... nest was m~lrK,eO, measurementsCape were .. ""t"""\tvt""rI brt::ed:ing season once of nearest measure run pelrpfm<llIClUar Universitymeasurement was a 3m an was PUlCeO aj!'>""'''''' nest an was "" ..... ,., ... ,,,. an g.