The Challenges for the Indian Ocean Tuna Commission
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DYNAMIC HABITAT USE of ALBACORE and THEIR PRIMARY PREY SPECIES in the CALIFORNIA CURRENT SYSTEM Calcofi Rep., Vol
MUHLING ET AL.: DYNAMIC HABITAT USE OF ALBACORE AND THEIR PRIMARY PREY SPECIES IN THE CALIFORNIA CURRENT SYSTEM CalCOFI Rep., Vol. 60, 2019 DYNAMIC HABITAT USE OF ALBACORE AND THEIR PRIMARY PREY SPECIES IN THE CALIFORNIA CURRENT SYSTEM BARBARA MUHLING, STEPHANIE BRODIE, MICHAEL JACOX OWYN SNODGRASS, DESIREE TOMMASI NOAA Earth System Research Laboratory University of California, Santa Cruz Boulder, CO Institute for Marine Science Santa Cruz, CA CHRISTOPHER A. EDWARDS ph: (858) 546-7197 Ocean Sciences Department [email protected] University of California, Santa Cruz, CA BARBARA MUHLING, OWYN SNODGRASS, YI XU HEIDI DEWAR, DESIREE TOMMASI, JOHN CHILDERS Department of Fisheries and Oceans NOAA Southwest Fisheries Science Center Delta, British Columbia, Canada San Diego, CA STEPHANIE SNYDER STEPHANIE BRODIE, MICHAEL JACOX Thomas More University, NOAA Southwest Fisheries Science Center Crestview Hills, KY Monterey, CA ABSTRACT peiods, krill, and some cephalopods (Smith et al. 2011). Juvenile north Pacific albacore Thunnus( alalunga) for- Many of these forage species are fished commercially, age in the California Current System (CCS), supporting but also support higher-order predators further up the fisheries between Baja California and British Columbia. food chain, such as other exploited species (e.g., tunas, Within the CCS, their distribution, abundance, and for- billfish) and protected resources (e.g., marine mammals aging behaviors are strongly variable interannually. Here, and seabirds) (Pikitch et al. 2004; Link and Browman we use catch logbook data and trawl survey records to 2014). Effectively managing marine ecosystems to pre- investigate how juvenile albacore in the CCS use their serve these trophic linkages, and improve robustness of oceanographic environment, and how their distributions management strategies to environmental variability, thus overlap with the habitats of four key forage species. -
Ottawa: Complete List of Seafood Samples
Ottawa: complete list of seafood samples Sold as Identified as (BOLD) Common name (CFIA Mislabelled Purchase (label/menu/server) market name) location Arctic char Salverus alpirus Arctic char (Arctic char, No Restaurant char) Arctic char Salverus alpirus Arctic char (Arctic char, No Restaurant char) Arctic char Salverus alpirus Arctic char (Arctic char, No Restaurant char) Arctic char Salverus alpirus Arctic char (Arctic char, No Grocery char) Store Butterfish Lepidocybium Escolar (Escolar, Snake Yes Restaurant flavobrunneum Mackerel) Cod, Fogo Island Gadus morhua Atlantic cod (Atlantic cod, No Restaurant cod) Cod, Atlantic Gadus morhua Atlantic cod (Atlantic cod, No Restaurant cod) Cod, Icelandic Gadus morhua Atlantic cod (Atlantic cod, No Restaurant cod) Cod, Atlantic Gadus morhua Atlantic cod (Atlantic cod, No Restaurant cod) (food truck) Cod, Atlantic Gadus macrocephalus Pacific cod (Pacific cod, cod) Yes Restaurant Cod, Pacific Micromesistius australis Southern blue whiting Yes Restaurant (Southern blue whiting, Blue whiting, Blue cod) Cod, Norwegian Gadus morhua Atlantic cod (Atlantic cod, No Restaurant cod) Cod, Atlantic Gadus morhua Atlantic cod (Atlantic cod, No Restaurant cod) Cod, Atlantic Gadus morhua Atlantic cod (Atlantic cod, No Restaurant cod) Cod, Alaskan Gadus macrocephalus Pacific cod (Pacific cod, cod) No Grocery Store Cod, Pacific Gadus macrocephalus Pacific cod (Pacific cod, cod) No Grocery Store Cod, North Atlantic Gadus macrocephalus Pacific cod (Pacific cod, cod) Yes Restaurant Cod Gadus macrocephalus Pacific cod (Pacific cod, cod) No Grocery Store Cod, Icelandic Gadus morhua Atlantic cod (Atlantic cod, No Grocery cod) Store Cod, Icelandic Gadus morhua Atlantic cod (Atlantic cod, No Grocery cod) Store Euro Bass Gadus morhua Atlantic cod (Atlantic cod, Yes Restaurant cod) Grouper Epinephelus diacanthus Spinycheek grouper (n/a) Yes – E. -
Longtail Tuna (Thunnus Tonggol)
I & I NSW WILD FISHERIES RESEARCH PROGRAM Longtail Tuna (Thunnus tonggol) EXPLOITATION STATUS UNDEFINED A coastal tuna species for which the recreational fishery is probably more significant than the commercial fishery. There are few useful data with which to establish status. SCIENTIFIC NAME STANDARD NAME COMMENT Previously, but incorrectly called northern Thunnus tonggol longtail tuna bluefin tuna. Thunnus tonggol Image © Bernard Yau Background The longtail tuna reaches maturity at lengths of around 60-70 cm, and spawning takes place The longtail tuna (Thunnus tonggol) inhabits during the summer months. The main diet of continental shelf and ocean waters in warm the longtail tuna consists of small pelagic and temperate and tropical regions of the Indo-west demersal fish, but also includes crustaceans and Pacific. It is a common species in Queensland cephalopods. waters but during the summer it can be found as far south as Twofold Bay in southern NSW. Because of their rapid acceleration, longtail Previously called ‘northern bluefin tuna’ in tuna are highly regarded as sports fish but Australia, the longtail tuna is a relatively small, their very dark flesh gives them a low market slender species that grows to a weight of acceptance. Since about 2000 the NSW 36 kg and length of 136 cm; it is more commercial catch has been less than 2 t per commonly 80-90 cm and 10-15 kg. In year, with most taken by the Ocean Trap and comparison, the true ‘northern bluefin’ (Thunnus Line Fishery and very small amounts reported orientalis) can exceed 500 kg in weight and by the Ocean Hauling and Estuary General reach almost 300 cm in length. -
TUNA FISHERY in KENY a Prepared by Dorcus Sigana National Component 4
IOTC-2009-SC-INF09 TUNA FISHERY IN KENY A prepared by Dorcus Sigana National Component 4 In Kenya, Tuna fishery is carried out artisanally and industrially. Artisanal fishermen sell their catch to the domestic market while Industrial fishermen process and export to the European Union market. Fishing is mainly confined to the coastal waters up to 50 meters depth. At Ungwana Bay, fishing has been extended to groups up to 200 meters for deep- water lobsters, prawns and demersal fishes. The larger pelagic fishes comprise the tuna and tuna-like species and the larger carangids, which are caught in large numbers between 15–200 meters depth mostly in June and July. Surveys on marine fisheries resources of Kenya dates back from 1951 when the East African Marine Fisheries Research Organization was formed, during which time the emphasis was on pelagic species. During the surveys on pelagic fishes between 1951 and 1954 catches of 0.52 kg/line/hr were obtained. 22% of the total catch was Scomberomorus commerson (Williams, 1956). In the same survey it was observed that tunas, especially the yellow fin tuna Thunnus albacares was present throughout the year, but with marked increase during the Southeast monsoon and very close to the shore up to 4 km off-shore. Other tunas that were found in the area were Albacare Thunnus alalunga, the dogtooth tuna Gymnosarda unicolor, small tuna Euthynnus affinis and skipjack Katsuwonus pelamis. Although these species were found within the Kenya waters they are unexploited. The Norad report states that Tunas are unique among fishes in having limited thermo- regulatory capacity. -
Among the World's Most Popular Game Fishes, Tunas Are Also
ÜBER-FISH Among the World’s Most Popular Game Fishes, Tunas Are Also Some of the Most Highly Evolved and Sophisticated of All the Ocean’s Predators BY DOUG OLANDER DANIEL GOEZ DANIEL 74 DECEMBER 2017 SPORTFISHINGMAG.COM 75 The Family Tree minimizes drag with a very low reduce the turbulence in the Tunas are part of the family drag coefficient,” optimizing effi- water ahead of the tail. Scombridae, which also includes cient swimming both at cruise Unlike most fishes with broad, mackerels, large and small. But and burst. While most fishes bend flexible tails that bend to scoop there are tunas, and then there their bodies side to side when water to move a fish forward, are, well, “true tunas.” moving forward, tunas’ bodies tunas derive tremendous That is, two groups don’t bend. They’re essentially thrust with thin, hard, lunate WHILE MOST FISHES BEND ( sometimes known as “tribes”) rigid, solid torpedoes. ( crescent-moon-shaped) tails dominate the tuna clan. One is And these torpedoes are that beat constantly, capable of THEIR BODIES SIDE TO SIDE Thunnini, which is the group perfectly streamlined, their 10 to 12 or more beats per second. considered true tunas, charac- larger fins fitting perfectly into That relentless thrust accounts WHEN MOVING FORWARD, terized by two separate dorsal grooves so no part of these fins for the unstoppable runs that fins and a relatively thick body. a number of highly specialized protrudes above the body surface. tuna make repeatedly when TUNAS’ BODIES DON’T BEND. The 15 species of Thunnini are features facilitate these They lack the convex eyes of hooked. -
Yellowfin Tuna
Ahi yellown tuna (Thunnus albacares) is one of two Islands. species known in Hawaii simply as Fishing Methods: intermediaries on all islands, or di- ahi. Similar in general appearance rectly to wholesalers and retailers, or it may be shared with family and to bigeye tuna (the other species - known as ahi friends. Most ahi is sold fresh, but men. A large part of the commercial surpluses caught during the peak be recognized by its more torpedo catch (44%) is harvested by longline shaped body, smaller head and eyes. summer season are sometimes dried boats, which may search for tuna and smoked. In Hawaii, shibi is another name up to 800 nautical miles from port and set hooks in deep waters. Yel- Quality to depths below 600 ft. Landings by either bigeye or albacore tuna. Al- lengthen with age. the island of Hawaii, can be sub- stantial (36%) in some years. Troll- Seasonality & How ers contribute most of the remain- does not retain the beautiful natu- They Are Caught der (20%) of the commercial catch ral red color as long as bigeye. The - Availability and Seasonality: - Caught year-round in Hawaii’s wa- ing tournaments held in Hawaii. method, care in handling and other Distribution: abundant during the summer sea- The longline catch and some of the son (May-September). There are handline (ika-shibi) catch of ahi is species. Noticeable changes occur auction. The majority of the hand- Hawaii. ocean surface temperatures and line catch is sold to wholesalers and other oceanographic conditions fa- intermediary buyers on the island of surface during the summer season vor the migration of ahi schools to are susceptible to a quality defect The troll catch may be marketed known as “burnt tuna”. -
Albacore Tuna Have fl Uctuated Considerably from Year To
Tuna [211] 86587_p211_220.indd 211 12/30/04 4:53:37 PM highlights ■ The catches of Pacifi c bluefi n tuna and North Pacifi c albacore tuna have fl uctuated considerably from year to Ocean year, but no upward or downward trends are apparent for either species. and ■ Increasing the age at entry of Pacifi c bluefi n into the fi shery might increase the yields per recruit of that Climate species. ■ The status of North Pacifi c albacore is uncertain, but most scientists believe that greater harvests of that species Changes would not be sustainable. [212] 86587_p211_220.indd 212 12/30/04 4:53:38 PM background The Inter-American Tropical Tuna Commission (IATTC) studies the tunas of the eastern Pacifi c Ocean (EPO), defi ned for its purposes as the area bounded by the coastline of North, Central, and South America, 40ºN, 150ºW, and 40ºS. The IATTC staff maintains records for most of the vessels that fi sh at the surface for skipjack tuna (Katsuwonus pelamis), yellowfi n tuna (Thunnus albacares), bigeye tuna (T. obesus), and Pacifi c bluefi n tuna (T. orientalis) in the EPO. Pacifi c bluefi n and albacore tuna (T. alalunga) are the tunas most relevant to the region of interest to PICES. Pacifi c bluefi n tuna Spawning of Pacifi c bluefi n apparently takes place only Age-1 and older fi sh are caught by purse seining, in the western Pacifi c Ocean (WPO). Some juvenile mostly during May-September between about 30°- bluefi n move from the WPO to the EPO, and then later 42°N and 140°-152°E. -
Spillover of the Atlantic Bluefin Tuna Offspring from Cages in the Adriatic Sea: a Multidisciplinary Approach and Assessment
RESEARCH ARTICLE Spillover of the Atlantic bluefin tuna offspring from cages in the Adriatic Sea: A multidisciplinary approach and assessment Tomislav DzÏoić1☯*, Gordana Beg Paklar1☯, Branka Grbec1☯, Stjepan Ivatek-SÏ ahdan2☯, Barbara Zorica3☯, Tanja SÏ egvić-Bubić4☯, Vanja ČikesÏ Keč3☯, Ivana Lepen Pleić4☯, Ivona Mladineo4☯, Leon GrubisÏić4☯, Philippe Verley5☯ 1 Physical Oceanography Laboratory, Institute of Oceanography and Fisheries, Split, Croatia, 2 Research and Development Division, Meteorological and Hydrological Service, Zagreb, Croatia, 3 Laboratory of a1111111111 Fisheries Science and Management of Pelagic and Demersal Resources, Institute of Oceanography and a1111111111 Fisheries, Split, Croatia, 4 Laboratory for Aquaculture, Institute of Oceanography and Fisheries, Split, a1111111111 Croatia, 5 Institute de recherche pour le developpement, UMR Botany and Modelling of Plant Architecture a1111111111 and Vegetation, Montpellier, France a1111111111 ☯ These authors contributed equally to this work. * [email protected] OPEN ACCESS Abstract Citation: DzÏoić T, Beg Paklar G, Grbec B, Ivatek- During routine monitoring of commercial purse seine catches in 2011, 87 fingerling speci- SÏahdan S, Zorica B, SÏegvić-Bubić T, et al. (2017) Spillover of the Atlantic bluefin tuna offspring from mens of scombrids were collected in the southern Adriatic Sea. Sequencing of the mito- cages in the Adriatic Sea: A multidisciplinary chondrial DNA control region locus inferred that specimens belonged to the Atlantic bluefin approach and assessment. PLoS ONE 12(11): tuna, Thunnus thynnus (Linnaeus, 1758) (N = 29), bullet tuna, Auxis rochei (Risso, 1810) e0188956. https://doi.org/10.1371/journal. pone.0188956 (N = 30) and little tunny, Euthynnus alletteratus, Rafinesque, 1810 (N = 28). According to previously published growth parameters, the age of the collected specimens was estimated Editor: Aldo Corriero, Universita degli Studi di Bari Aldo Moro, ITALY at approximately 30±40 days, suggesting they might have been spawned in the Adriatic Sea, contrary to the current knowledge. -
A Global Valuation of Tuna an Update February 2020 (Final)
Netting Billions: a global valuation of tuna an update February 2020 (Final) ii Report Information This report has been prepared with the financial support of The Pew Charitable Trusts. The views expressed in this study are purely those of the authors. The content of this report may not be reproduced, or even part thereof, without explicit reference to the source. Citation: Macfadyen, G., Huntington, T., Defaux, V., Llewellin, P., and James, P., 2019. Netting Billions: a global valuation of tuna (an update). Report produced by Poseidon Aquatic Resources Management Ltd. Client: The Pew Charitable Trusts Version: Final Report ref: 1456-REG/R/02/A Date issued: 7 February 2020 Acknowledgements: Our thanks to the following consultants who assisted with data collection for this study: Richard Banks, Sachiko Tsuji, Charles Greenwald, Heiko Seilert, Gilles Hosch, Alicia Sanmamed, Anna Madriles, Gwendal le Fol, Tomasz Kulikowski, and Benoit Caillart. 7 February 2020 iii CONTENTS 1. BACKGROUND AND INTRODUCTION ................................................................... 1 2. STUDY METHODOLOGY ......................................................................................... 3 3. TUNA LANDINGS ..................................................................................................... 5 3.1 METHODOLOGICAL ISSUES ....................................................................................... 5 3.2 RESULTS ............................................................................................................... -
Introduction Tunas and Other Large Highly-Migratory Species
CHAPTER 1: AUTHOR: LAST UPDATE: OVERVIEW SECRETARIAT Jan. 25, 2006 1. Overview 1.1 What is ICCAT? Introduction Tunas and other large highly-migratory species are typically assessed and managed through international arrangements. Since the distribution of such stocks is not limited to the waters of any single sovereign nation, such arrangements are necessary in order to share the available research and fishery information. The International Commission for the Conservation of Atlantic Tunas is responsible for the conservation of tunas and tuna-like species in the Atlantic Ocean and adjacent seas. The organization was established at a Conference of Plenipotentiaries, which prepared and adopted the International Convention for the Conservation of Atlantic Tunas signed in Rio de Janeiro, Brazil, in 1966. After a ratification process, the Convention entered formally into force in 1969. The official languages of ICCAT are English, French and Spanish. The Commission's work requires the collection and analysis of statistical information relative to current conditions and trends of the fishery resources in the Convention. About 30 species are covered by the Convention: Atlantic bluefin (Thunnus thynnus thynnus), yellowfin (Thunnus albacares), albacore (Thunnus alalunga), bigeye tuna (Thunnus obesus) and skipjack (Katsuwonus pelamis); swordfish (Xiphias gladius); billfishes such as white marlin (Tetrapturus albidus), blue marlin (Makaira nigricans), sailfish (Istiophorus albicans) and spearfish (Tetrapturus pfluegeri & T. belone); mackerels such as spotted Spanish mackerel (Scomberomorus maculatese) and king mackerel (Scomberomorus cavalla); and, small tunas like black skipjack (Euthynnus alletteratus), frigate tuna (Auxis thazard), and Atlantic bonito (Sarda sarda). Southern bluefin tuna (Thunnus maccoyii) is also part of the Convention, although currently the primary responsibility for assessing and managing this species rests with the Commission for the Conservation of Southern Bluefin Tuna (CCSBT). -
Little Tuna Euthynnus Affinis in the Hong Kong Area*
Bulletin of the Japanese Society of Scientific Fisheries Vol. 36, No. 1, 1970 9 Little Tuna Euthynnus affinis in the Hong Kong area* Gordon R. WILLIAMSON** (Received September 10, 1969) The Little Tuna Euthynnus affinis CANTOR(Fig . 1) is distributed from the east coast of Africa in the Indian Ocean to Indonesia and Japan across the equatorial Pacific Ocean to Hawaii (Fig. 2). KIKAWA et al.1) and WILLIAMS2) have summarised data on the species in the Pacific and Indian Oceans respectively , TESTER and NAKAMURA3) give additional information from Hawaii, ABE4) gives a good colour illustration of the species and NAKAMURA Fig. 1. Euthynnus affinis CANTOR. and MAGNUSON5) describe periodic changes From NAKAMURAand MAGNUSON5) in intensity of the fish's black spots . The taxonomy of the species, which was formerly called E. yaito by some biologists, is discussed by FRASER-BRUNNER6), COLLETTEand GIBBS7)and NAKAMURA8). A general account of fishery resources around Hong Kong is given by WILLIAMSON9). Fishermen's reports indicate that E. affinis is the commonest tuna in the Hong Kong area. Auxis thazard (LACEPEDE)is the only species with which it can be confused. E. affinis and A. thazard can be separated by the following characters: Fig. 2. Distribution of Euthynnus affinis CANTOR. After KIKAWA et a1.1) and WILLIAMS2)and with the Kwangtung coast added to the distribution range. One specimen of E. affinis has been recorded from California. * Contribution No . 36 from the Fisherier Research Station, Hong Kong. ** Agriculture and Fisheries Department , Fisheries Research Station, Aberdeen, Hong Kong. 10 E. affinis 15-16 dorsal fin rays, transient black spots under pectoral fins A. -
Ecological Importance of Auxis Spp. As Prey for Dolphin and Wahoo
Ecological importance of Auxis spp. as prey for Dolphin and Wahoo DEPARTMENT OF ENVIRONMENTAL QUALITY Marine Fisheries SAFMC Dolphin/Wahoo Committee| Steve Poland | 12/3/2018 Overview Background • MAFMC request Pelagic Food Web in the SAB • Auxis spp. Important prey in Dolphin/Wahoo diets • Poland thesis – seasonal and size contribution • Rudershausen – annual contribution Questions? 2 MAFMC Unmanaged Forage Omnibus Amendment “To prohibit the development of new and expansion of existing directed commercial fisheries on unmanaged forage species … until the Council has had an adequate opportunity to assess the scientific information relating to any new or expanded directed fisheries and consider potential impacts to existing fisheries, fishing communities, and the marine ecosystem.” Major Actions • Designate taxa included in the amendment as EC species • Manage chub mackerel under discretionary authority • Require EFPs for new fisheries and require comm vessels to be permitted if landing EC species 3 Request to South Atlantic NMFS disapproved measures • Determined inclusion of Auxis spp as a EC species is inconsistent with NS2 • Did not demonstrate the Auxis spp are important forage for MAFMC managed species MAFMC felt that Auxis still warranted protection within its management region • Sent request to SAFMC to consider management of Auxis under its Dolphin/Wahoo FMP Dolphin/Wahoo management unit extends from FL Keys through NY 4 Prey Groups 1. Sargassum associated prey • Filefish, pufferfish, juvenile jacks, swimming crabs 2. Surface schooling prey • Flying fish 3. Schooling prey not assoc. with surface • Bullet tuna, round herring, jacks, cephalopods 4. Small aggregations of crustaceans • Amphipods, stomatopods, isopods Auxis spp. Two species occur in the Atlantic: • A.