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American Samoa's Alia Longline Fishery

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American Samoa's Alia Longline Fishery AAmericanmerican Samoa’sSamoa’s AliaAlia LonglineLongline FisheryFishery PPaauull BBaarrttrraamm JJoohhnn KKaanneekkoo PPaaccMMaarr,, IInncc.. PaParrtt NNoo.. 11:: PrProofifillee HHiigghhlliinneerr AAlliiaa OOppeerraatitioonn,, 1100//0033-1-111//0044 CCrreeww aanndd CCoommmmuunniittyy AAuummaaggaa CCoolllleecctteedd DDaattaa GeGeaarr CoConnffiigguurraattiioonn ooff aa hhiigghhlliinneerr iinn tthhee AAmmeerriiccaann SSaammooaa ssmmaallll--ssccaallee ((aalliaa)) albbaaccoorre ffiisshheerryy bbeettweweeenn OcOctt.. 22000044 aanndd SSeepptt.. 22000044 MeMeaann lleennggtthh of Mainline (miles) 1100 MeMeaann nnuumbmbeerr ooff hhooookkss ppeerr set 441122 TTyyppee ooff hhooookkss 1144//00,, 1155//00 cciirrccllee TTyyppee ooff bbaaiitt ppiillcchhaarrddss ((ppiilliikkaakkii)) MeMeaann nnuumbmbeerr ooff hhooookkss bbeettwweeeenn 3311 ffllooaattss MeMeaann nnuumbmbeerr ooff lliigghhttstticks 00 NNuumbmbeerr ooff sseettss 115599 AAmmeerriiccaann SSaamomoaa ssmmaallll--ssccaallee ((aalliiaa)) aalbalbaccoorree ffiissheherryy bbeettwweeeenn OOcctt.. 22000044 aandnd SSeeptpt.. 22000044 AAlliiaa FFlleeeett CCoonnttrraacctteedd aalliiaa AAccttiivviittyy ((SSWW44)) NNuumbmbeerr ooff ttrriippss 553399 115599 NNuumbmbeerr ooff sseettss 662233 115599 NNuumbmbeerr ooff hhooookkss sseett 117700,,006655 6655,,443366 NNuumbmbeerr ooff lliigghhtt stiicckkss 330033 00 FFiisshhiinngg PPrraaccttiicceess ooff aa hhiigghhlliinneerr iinn tthhee AAmmeerriiccaann SSaammooaa ssmmaallll--ssccaallee ((aalliiaa)) aallbbaaccoorree ffiisshheerryy bbeettweweeenn OcOctt.. 22000033 – Sept. 2004 MMeeaann timtimee sesettinttingg stastarrtetedd 0066:1:144 MMeeaann timtimee sesettinttingg cocompleted 0077:3:333 MMeeaann sosoaakk timtimee 9 hhrrss 1199 mminin ((ffrroomm eenndd ooff sseettinttingg toto stastarrtt ooff hhaauulilinngg)) MMeeaann timtimee hhaauulinlingg stastarrtetedd 1166:4:411 MMeeaann timtimee hhaauulinlingg cocommppleletetedd 1199:1:100 MMeeaann nnuumber of hooks lost per set 88.8.8 NuNummbbeerr ooff sseetsts 115599 CaCattcchh CCoommppoossiittiioonn ooff aa hhiigghhlliinneerr iinn tthhee AAmmeerriiccaann SSaammooaa ssmmaallll--ssccaallee ((aalliiaa)) aallbbaaccoorree ffiisshheerryy bbeettweweeenn OcOctt.. 22000033 –– SSeepptt.. 22000044 SSppeecciieess NNoo.. ooff WWtt..** MMeeaann NNoo.. WWtt..** FFiisshh WWtt..** KKeepptt KKeepptt AAllbbaaccoorree 559944 2233,,779911 3399..9988 559944 2233,,779911 YYeelllloowfwfiinn 335500 1133,,992277 3399..9911 335500 1133,,992277 BBiiggeeyyee 2277 11,,770077 6633..2222 2277 11,,770077 SSkkiippjjaacckk 8833 11,,339999 1166..8866 8833 11,,338866 KKaawwaakkaawawa 00 00 00 00 00 TTuunnaa 11,,005544 4400,,882244 3311..9999 11,,005544 4400,,881111 SSuubbttoottaall Wt. = weight in pounds (lb) Catch Composition of a highliner in the American Samoa small-scale (alia) albacore fishery between Oct. 2003 – Sept. 2004 Species No. of Fish Wt. Mean Wt. No.. KKeptt Wt. Kept (lb) (lb) (lb) Mahimahi 57 1,470 25.79 57 1,470 Wahoo 50 1,284 25.68 50 1,284 Swordfish 1 105 105 1 105 Blue Marliin 10 753 75.3 10 753 Black Marliin 0 0 0 0 0 Striped Marlin 2 198 99 2 198 Sailfish 0 0 0 0 0 Spearfish 0 0 0 0 0 Oceanic White Tip Shark 0 0 0 0 0 Blue Shark 3 NW NW 0 NW Shortfin Mako 10 NW NW 0 NW Longfin Mako 5 NW NW 0 NW Thresher Shark 0 0 0 0 0 Dogtooth Tuna 0 0 0 0 0 Other PPMUS Subtotal 138 3,810 30.07 120 3,810 NW = not weighed CaCattcchh CCoommppoossiittiioonn ooff aa hhiigghhlliinneerr iinn tthhee AAmmeerriiccaann SSaamomoaa ssmmaallll--ssccaallee ((aalliiaa)) aallbbaaccoorree ffiisshheerryy bbeettwweeeenn OOcctt.. 22000033 –– SSeepptt.. 22000044 Speciies No. of Wt. Mean Wt. No. Kept Wt. Kept Fiish (lblb) (lb) (lb) Great Barracuda 15 271 18.07 15 271 Raininbow Runner 1 5 5 1 5 Moonfisish 3 314 104.7 3 314 Oiilflfisish 0 0 0 0 0 Pomfret 8 161 20.1 8 161 Lancetfiish 0 0 0 0 0 Snake Mackerel 0 0 0 0 0 Pelalagiic stiingray 0 0 0 0 0 Misisc. Subtotall 27 751 18.48 27 751 CCaattcchh CCoommppoossiittiioonn ooff aa hhiigghhlliinneerr iinn tthhee AAmmeerriiccaann SSaammooaa ssmmaallll--ssccaallee ((aalliiaa)) aallbbaaccoorree ffiisshheerryy bbeettweweeenn OOcctt.. 22000033 –– SSeepptt.. 22000044 SSppeecciieess NoNo.. ooff WWtt.. MeMeaann NoNo.. WWtt.. FFiisshh ((llbb)) WWtt.. KKeepptt KKeepptt ((llbb)) ((llbb)) TToottaall 11,,221199 4455,,338855 2266..6622 11,,220011** 4455,,337722 PPeellaaggiiccss *Eighteen (18) sharks were caught but not retained. Catch per unit effort (1,000 hooks) of a highliner in the American Samoa small-scale (alia) albacore fishery between Oct. 2003 – Sept. 2004 Species No. of fish per 1,000 hooks Wt. fish (lb) per 1,000 hooks Albacore tuna 9.187 368 Yellowfin tuna 5.413 215.4 Bigeye Tuna 0.418 26.4 Skipjack 1.268 21.44 Tuna Subtotal 16.29 631.2 Mahimahi 0.882 22.74 Wahoo 0.773 19.86 Swordfish 0.015 1.624 Blue Marlin 0.155 11.65 Striped Marlin 0.031 3.062 Blue Shark 0.046 NW Shortfin Mako 0.155 NW Longfin Mako 0.077 NW Other PPMUS Subtotal 2.134 58.94 Great Barracuda 0.232 0.418 Rainbow Runner 0.015 0.077 Moonfish 0.046 4.856 Pomfret 0.124 2.49 Misc. Subtotal 0.418 7.841 TOTAL PELAGICS 18.84 697.9 *No. of hooks for CPUE calculations = 64,658 Catch status at retrieval of a highliner in the American Samoa small-scale (alia) albacore fishery between Oct. 2003 – Sept. 2004 Species N % Alive % Dead Albacore tuna 594 12.1 87.9 Yellowfin tuna 350 4.6 95.4 Bigeye Tuna 27 11.1 88.9 Skipjack 83 0 100 Tuna Subtotal 1,054 8.6 91.4 Mahimahi 57 8.8 91.2 Wahoo 50 4 96 Swordfish 1 0 100 Blue Marlin 10 0 100 Striped Marlin 2 0 100 Blue Shark* 3 100 0 Shortfiin Mako* 10 30 70 Longfin Mako* 5 60 40 Other PPMUS Subtotal 138 11.6 88.4 Great Barracuda 15 20 80 Rainbow Runner 1 0 100 Moonfish 3 0 100 Pomfret 8 12.5 87.5 Misc. Subtotal 27 14.8 85.2 TOTAL PELAGICS 1,219 9.1 90.9 *For sharks: “not injured” = alive, “injured” included with dead fish. Length-Weight Relationship of the catch produced by a highliner in the American Samoa small-scale (alia) albacore fishery between Oct. 2003 – Sept. 2004 Species N Mean Length Mean Wt. L/W Ratio (cm) (lb) Albacore tuna 594 87.79 39.98 2.196 Yellowfin tuna 350 94.44 39.91 2.366 Bigeye Tuna 27 102.3 63.22 1.618 Skipjack 83 65.36 16.86 3.854 Tuna Subtotal 1,054 Mahimahi 57 106.8 25.79 4.141 Wahoo 50 112.5 25.68 4.381 Swordfish 1 150 105 1.429 Blue Marlin 10 142 75.3 1.886 Striped Marlin 2 170 99 1.717 Other PPMUS Subtotal 120 Great Barracuda 15 81.73 18.07 4.523 Rainbow Runner 1 62 5 12.4 Moonfish 3 112.7 25.68 4.389 Pomfret 8 63 20.13 3.13 Misc. Subtotal 27 TOTAL PELAGICS 1,201 1 .6 s 1 k . o 4 o 1 h . 0 2 0 ,0 1 /1 h 0 s .8 fi f 0 o . 6 o 0 N .4 0 .2 A lba 0 c ore T Oct.03 u n a C Nov.03 P U E Dec.03 Jan.04 Feb.04 Mar.04 M o n Apr.04 th s May.04 Jun.04 C Jul.04 P U E Aug.04 Weight Frequency of Albacore Tuna 250 200 150 Freq. 100 50 0 25-27 28-30 31-33 34-36 37-39 40-42 43-45 46-48 49-51 52-54 55-57 >=58 Weight Class (pounds) NNOO SSEEAA TTUURRTTLLEE TTAAKKEESS DDUURRIINNGG PPRROOJJEECCTT PPEERRIIOODD PPaarrtt NNoo.. 22:: LLiivvee vvss.. DDeeaadd AAllbbaaccororee LLoonngglliinnee aallbbaaccoorree ttyyppiiccaallllyy llaannddeedd ddeeaadd oorr ddyyiinngg.. DDoo aalliiaa ffiisshhiinngg mmeeththooddss iinnccrreeaassee %% aallbbaaccoorree rreettrriieevveedd aalliivvee?? CCaann aalliiaa ffiisshhiinngg mmeeththooddss bbee mmooddiiffiieedd ttoo iinnccrreeaassee %% aallbbaaccoorree rreetrtriieevveedd aalliivvee?? AAllbbaaccoorree SSwwiimm BBllaaddddeerr FFrraaggililee,, EEaassiillyy RRuuppttuurreedd F.X. Bard and E. Josse. 1996. Peculiarity of swimming bladder of large albacore (Thunnus alalunga) caught by longline. South paciific allbacore research,, 6th meeting. AAlliiaa LLininee RReettrriieevvaall isis MMaannuuaall aanndd SSllooww SmSmaallll IInnccrreeaassee iinn %% AAllbbaaccoorree AAlliivvee -- AAlliiaa LLoonngglliinnee MMeetthhoodd AAlliiaa mmeetthhooddss mmaarrggiinnaallllyy iimmpprroovvee ssuurrvviivvaabbiilliittyy –– 1122%% rreettrriieevveedd aalliivvee HoHoookkss ppeerr sseett 440000//sseett ffoorr aalliiaa 33000000//sseett ffoorr llaarrggee ssaammooaa lloonngglliinneerrss RaRattee ooff lliinnee rreettrriieevvaall 8800 hhooookkss//hhrr ffoorr aalliiaa 225500 hhooookkss//hhrr ffoorr memecchhaanniizzeedd rreettrriieevvaall FFiisshheerrmmeenn’’ss KKnnoowwlleeddggee AApppplliieedd ttoo IInnccrreeaassee LLiivvee %% SSeett aarroouunndd ffuullll mmoooonn ((eesspp.. JJuunnee aanndd JJuullyy)) AAllbbaaccoorree sshhaalllloowewerr PPaattrrooll mmaaiinnlliinnee aafftteerr sseettttiinngg RReettrriieevvee lliivvee ffiisshh SSttaarrtt hhaauull aatt ssttaarrtt ooff sseett MoMorree ssooaakk ttiimeme ffoorr llaasstt hhooookkss sseett ACKACKNNOOWWLLEEDGEDGEMMEENNTTSS Daiana S Aitaoto, Data Processing Elvin (Eo) Mokoma, Soouuththwwiinndd 44 oowwnneerr Southwind 4 Crew and Pago Pago Village aumaga Francesca Riolo, American Samoa DMWR GIS Specialist Emmanuel Tardy, DMWR Biologist.
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