Best Fish Guide 2009-2010 - Forest and Bird

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Striped marlin Scientific name: Tetrapturus audax Other names: takaketonga (Maori), marlin. Ranking: E (Red - Avoid) Description: Striped marlin is a highly migratory species (HMS) of broadbill fish and an important oceanic predator. The management responsibility for this species, as with other Western Pacific HMS, lies with an international body – the Western and Central Pacific Fisheries commission (WCPFC). However, the Ministry of Fisheries is responsible for upholding WCPFC rules in New Zealand waters. Between 1987 and 1991 there was a moratorium on landing any broadbill species (marlin and swordfish) in the area between Mokau and East Cape (Auckland Fisheries Management Area) due to concerns about depleted stocks. In 1991, the moratorium was replaced with a memorandum of understanding (MOU) between recreational and commercial fishers, to allow for the commercial take of swordbill. Since 1995, there is a requirement to report all catches of billfish. The MOU was last singed in 1996. As a result of the agreement on billfish, striped marlin is principally a recreational only fish (about 65% tagged and released to aid research), with any commercial captures the result of accidental capture in the tuna surface longline fishery in northern waters. Ecological concerns: Uncertainty about the stock assessment plus the state of the stocks and catch limits. Commercial captures of marlin are associated with the bycatch of sharks, seabirds and fur seals. One of the key concerns is the ecological impacts of removing this key predator species from oceanic food webs. Economic value: Marlin is sold in East Asia. ASSESSMENT OUTPUT Biology and risk of overfishing (score C) Distribution: Striped marlin are caught mainly around the North Islands, north of 42oS. Maximum age (years): 12+ Age at sexual maturity: 1-2? Growth rate: Medium. Reproductive output: Medium. Age exploited: 2? Status and sustainability of fish catches (score D) Population size: Unknown - South Pacific migratory population. Annual catch limit: None set. Recorded catch: Latest reported annual commercial catch of 17 tonnes in 2007, most of which was discarded, and 2 tonnes taken by New Zealand vessels outside the zone. Stock trends: Uncertain, but likely declining. MSY Status: Uncertain but may be below BMSY. The Ministry of Fisheries assessment plenary report states: “Several of the plausible model scenarios investigated indicate that current levels of fishing mortality may approximate or exceed the reference level FMSY and current spawning biomass levels may approximate or be below the biomass based reference point BMSY. On the basis of this preliminary assessment, it is recommended as a precautionary measure that there should be no increase in fishing mortality (i.e. fishing effort) on striped marlin in the southwestern Pacific, particularly …the Tasman Sea...” (Ministry of Fisheries, 2008, p120-121). Impact of fishing method and protected, threatened and endangered species captures (score D and E) Fishing method: Pelagic / Surface longlining for tuna around the North Island. Habitat damage: None. Bycatch: Sharks, New Zealand fur seals and seabirds are caught in the longline fishery. Ecological effects: Removal of some of these important large predators may impact oceanic food web dynamics, including other species caught as bycatch in the longline fishery. Management and management unit (score D and D) Quota Management Species: No – due to an MOU with recreational fishers, marlin cannot be targeted by commercial fishers.. Forest & Bird Best Fish Guide 2009-2010: Ecological rankings 115 ?
Management plan: No. However, a highly migratory species plan has been drafted by the Ministry of Fisheries. Stock assessment: A stock assessment in 2006 by the WCPFC Scientific Committee, with collaboration by Australia and the Secretariat of the Pacific Community (SPC). References: Report from the Fishery Assessment Plenary, May 2005: stock assessments and yield estimates. Part 3: Porae to Yellow-eyed Mullet. Science Group, Ministry of Fisheries; Guidebook to New Zealand Commercial Fish Species, Revised Edition 1990, NZ Fishing Industry Board. Forest & Bird Best Fish Guide 2009-2010: Ecological rankings 116
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Best Fish Guide 2009-2010 How susta
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Contents Introduction 1 New Zealand
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Introduction New Zealand’s oceans
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Forest & Bird hopes that making sea
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What species is it? Most fish speci
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The Best and the Worst New Zealand
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Seafood assessment results The foll
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Management component: Single specie
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Anchovy Scientific name: Engraulis
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Management component: Two species m
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Bigeye tuna Scientific name: Thunnu
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Blue cod Scientific name: Paraperci
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Blue mackerel Scientific name: Scom
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Blue shark Scientific name: Prionac
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Blue warehou Scientific name: Serio
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Butterfish Scientific name: Odax pu
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Impact of fishing method and protec
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Eels Scientific name: Anguilla aust
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Elephant fish Scientific name: Call
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Flatfish Black flounder, yellow-bel
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Frostfish Scientific name: Lepidopu
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Gemfish Scientific name: Rexea sola
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Catch limits: Yes. Management plan:
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Management and management unit (sco
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Habitat damage: Bottom trawling red
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1.2: B2009 very likely to be 39% B0
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Habitat damage: Low for purse seini
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Kahawai Scientific name: Arripis tr
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Kingfish Scientific name: Seriola l
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Ling Scientific name: Genypterus bl
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Lookdown dory Scientific name: Cytt
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Management and management unit (sco
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Orange Roughy Scientific name: Hopl
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Oreo Scientific name: Allocyttus ni
Page 70 and 71: Oysters Scientific name: Tiostrea c
Page 72 and 73: Pacific bluefin tuna Scientific nam
Page 74 and 75: Paddle crab Scientific name: Ovalip
Page 76 and 77: Stock assessment: No quantitative s
Page 78 and 79: PAU 7: “The assessment shows a de
Page 82 and 83: Queen scallops Scientific name: Chl
Page 84 and 85: Habitat damage: Trawling damages de
Page 86 and 87: GUR 8: “It is not known if recent
Page 88 and 89: Ribaldo Scientific name: Mora moro
Page 90 and 91: Impact of fishing method and protec
Page 92 and 93: Marlborough-Canterbury (CRA5): “T
Page 94 and 95: Management and management unit (sco
Page 96 and 97: Coromandel - “biomass estimates a
Page 98 and 99: Stock assessment: No completed quan
Page 100 and 101: Bycatch: Juvenile school sharks are
Page 102 and 103: Management plan: No. Management com
Page 106 and 107: Ecological effects: The primary eff
Page 108 and 109: Management plan: No. Management com
Page 110 and 111: SNA2: “As there are no indices of
Page 112 and 113: Habitat damage: Bottom trawling bul
Page 114 and 115: Impact of fishing method and protec
Page 116 and 117: Ecological effects: As with most sh
Page 118 and 119: Stargazer / monkfish Scientific nam
Page 122 and 123: Swordfish Scientific name: Xiphias
Page 124 and 125: Tarakihi Scientific name: Nemadacty
Page 126 and 127: Trevally Scientific name: Pseudocar
Page 128 and 129: Trumpeter Scientific name: Latris l
Page 130 and 131: Yellowfin tuna Scientific name: Thu
Page 132 and 133: Yellow-eyed mullet Scientific name:
Page 134 and 135: Appendix I Best Fish Guide 2009-201
Page 136 and 137: Criteria Scores Criterion importanc
Page 138 and 139: Acronyms ACAP - Agreement on the Co
Page 140 and 141: Developed fishery - A fishery opera
Page 142 and 143: Trammel net - Type of gill net with
Page 144 and 145: Fish Name BFG name Forest & Bird Be
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Best Fish Guide 2009-2010 - Forest and Bird

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