Among the World's Most Popular Game Fishes, Tunas Are Also
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NOTE on the Fishery and Some Aspects of the Biology of Dogtooth Tuna, Gymnosarda Unicolor (Ruppell)From Minicoy, Lakshadweep
I. mar. biol. Ass. India, 47 (1) : 111 - 113, Jan. - June, 2005 NOTE On the fishery and some aspects of the biology of dogtooth tuna, Gymnosarda unicolor (Ruppell)from Minicoy, Lakshadweep M.Sivadas and A.Anasukoya Research Centre of Central Marine Fisheries Research Institute, Calicut - 673 005, India Abstract The results of a study, on the fishery and biology of dogtooth tuna, Gymnosarda unicolor (Ruppell), conducted at Minicoy during 1995 to 1999 are presented. The resource is exploited from around the reef areas during July-August or September for sustenance when the usual fishing activities like pole and line and trolling are suspended. The total catch in a season varied from 56 to 481 kg. The size ranged from 44 to 126 cm fork length with the modal group at 58 and 62 cm. The length-weight relationship was found to be Log W = -4.5337 + 2.77 Log L. Fish below 70 cm size was found to be immature. The dogtooth tuna, Gymnosarda unicolor Material and methods (Ruppell) is a tropical Indo-Pacific epipe- Data on catch and biological aspects lagic species usually found around coral such as length, weight, feeding condition, reefs. In India, they are reported from maturity, etc were collected almost on a Andaman-Nicobar and from daily basis at the landing centre itself Lakshadweep Islands (Silas and Pillai, during each season. The entrails of the 1982). In Lakshadweep, they are not fishes are removed at the landing centre exploited by pole and line and troll line but are caught regularly, though in few itself before they are taken home. -
India's National Report to the Scientific Committee of the Indian Ocean
IOTC–2015–SC18–NR09[E] India’s National Report to the Scientific Committee of the Indian Ocean Tuna Commission’2015 Premchand, L. Ramalingam, A. Tiburtius, A. Siva, Ansuman Das, Rajashree B Sanadi and Rahul Kumar B Tailor Fishery Survey of India Government of India, Botawala Chambers, Sir. P. M. Road, Mumbai 0 INFORMATION OF FISHERIES, RESEARCH AND STATISTICS In accordance with IOTC Resolution 15/02, final YES scientific data for the previous year was Communication F.No.43-6/2014 Fy. II, dated provided to the Secretariat by June of the 03/07/2015 to the Ministry of Agriculture and current year, for all fleets other than Farmer’s Welfare, New Delhi. longline(e.g., for a National report submitted to the Secretariat in 2015, final data for the 2014 Calendar year must be provided to the Secretariat by 30 June’2015) In accordance with IOTC Resolution 15/02, YES provisional longline data for the previous year Communication F.No.43-6/2014 Fy.II, was provided to the Secretariat by 30 June of 03/07/2015 to the Ministry of Agriculture and the current year (e.g., for a National report Farmer’s Welfare, New Delhi. submitted to the Secretariat in 2015, final data for the 2014 Calendar year must be provided to the Secretariat by 30 June’2015) Reminder: Final longline data for the previous year is due to the Secretariat by 30 December of the current year (e.g., for a National report submitted to the Secretariat in 2015, final data for the 2014 Calendar year must be provided to the Secretariat by 30 June’2015) If no, please indicate the reason(s) and intended actions: - Executive Summary Tuna and tuna like fishes are one of the components of pelagic resources. -
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. -
IATTC-94-01 the Tuna Fishery, Stocks, and Ecosystem in the Eastern
INTER-AMERICAN TROPICAL TUNA COMMISSION 94TH MEETING Bilbao, Spain 22-26 July 2019 DOCUMENT IATTC-94-01 REPORT ON THE TUNA FISHERY, STOCKS, AND ECOSYSTEM IN THE EASTERN PACIFIC OCEAN IN 2018 A. The fishery for tunas and billfishes in the eastern Pacific Ocean ....................................................... 3 B. Yellowfin tuna ................................................................................................................................... 50 C. Skipjack tuna ..................................................................................................................................... 58 D. Bigeye tuna ........................................................................................................................................ 64 E. Pacific bluefin tuna ............................................................................................................................ 72 F. Albacore tuna .................................................................................................................................... 76 G. Swordfish ........................................................................................................................................... 82 H. Blue marlin ........................................................................................................................................ 85 I. Striped marlin .................................................................................................................................... 86 J. Sailfish -
Descriptions of Euthynnus and Auxis Larvae from the Pacific and Atlantic Oceans and Adjacent Seas
library THE GARLSBERG FOUNDATION’S OCEANOGRAPHIGAL EXPEDITION ROUND THE WORLD 1928—30 AND PREVIOUS “DANA”-EXPEDITIONS UNDER THE LEADERSHIP OF THE LATE PROFESSOR JOHANNES SCHMIDT DANA-BEPOBT No. 50. DESCRIPTIONS OF EUTHYNNUS AND AUXIS LARVAE FROM THE PACIFIC AND ATLANTIC OCEANS AND ADJACENT SEAS BY WALTER M. MATSUMOTO U.S. FISH AND WILDLIFE SERVICE WITH 31 FIGURES IN THE TEXT PUBLISHED BY THE CARLSBERG FOUNDATION THIS PAPER MAY BE EEFEEBED TO AS: •DANA-REPOKT No. 50, 1959« COPENHAGEN ANDR. FRED. H0ST A S 0 N PRINTED BY BIANCO LUNO A/S CONTENTS Page Introduction ...................................................................... 3 Descriptions of larvae and postlarvae................. 21 Methods.............................................................................. 4 Auxis type I ......................................................... 21 Genus E uthynnus.............................................................. 5 Auxis type I I ....................................................... 2:i Notes on adults and juveniles ............................. 5 Discussion of species dilTerences........................... 25 Descriptions of larvae and postlarvae................. 7 Geographical distribution of Euthynnus and Auxis Euthynnus tineatus.............................................. 7 larvae............................................................................ 25 Euthynnus alletteratus.......................................... 11 Spawning areas as indicated by larval catches___ 27 Euthynnus ijaito .................................................. -
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). -
Bigeye Tuna (Thunnus Obesus) and Tuna Fisheries of French Polynesia
BIGEYE TUNA (THUNNUS OBESUS) AND THE Tl1NA FISHERIES OF FRENCH POLYNESIA by Francois Xavier Bard" Erwan Josse', and Arsene Stein2 I. INTRODUCTION French Polynesia has a wide Exclusive Economic Zone (EEZ), established in October 1979, stretching over 4.8 million km2 in the South Pacific, in which most species of tropical tunas and tuna-like species are fished, at the surface or in subsurface waters. The main commercial species are: • Yellowfin tuna iThunnus albacares), caught at the surface and in subsurface waters; • Bigeye tuna (Thunnus obesus), caught only in subsurface waters; • Albacore tuna tThunnus a/a/unga), caught only in subsurface waters; • Blue marlin (Makaira mazara), caught at the surface and in subsurface waters; • Skipjack tuna (Katsuwonus pe/amis), caught only at the surface; • Wahoo (Acanthocybium so/andri), caught only at the surface. Other istiophorids (Tetrapturus audax, T. angustirostris, and Istiophorus platypteruss are also caught at the surface and in subsurface waters. Swordfish (Xiphias gladius) is present, but uncommon. Minor tunas such as black skipjack tEuthynnus aJlinis) and dogtooth tuna (Gymnosarda unicolori are present, but not actively sought. There is a long tradition ofcoastal tuna fishing in French Polynesia. Historically, fishermen in canoes have fished for deep-swimming tunas, using handlines made of vegetable fibers, hooks made of wood and mother-of pearl, and chunks of fish or live fish for bait. Sinking the line was achieved with a stone, around which the line was initially coiled. The fish, caught in precise fishing spots known as "tuna holes," were mainly yellowfin and mana tPrometichthys prometheusv. This "stone fishery," which uses small boats with outboard engines, locally called poti marara, and modem lines and hooks, which generally operate close to fish-aggregating devices (FADs) moored in the vicinity of the larger islands (Moarii and Leproux, 1996), but tuna holes are sometimes fished as well. -
The Italian Annotated Bibliography on Small Tunas
SCRS/2020/061 Collect. Vol. Sci. Pap. ICCAT, 77(9): 34-84 (2020) THE ITALIAN ANNOTATED BIBLIOGRAPHY ON SMALL TUNAS C. Piccinetti1, P. Addis2, A. Di Natale3, F. Garibaldi4, F. Tinti5 SUMMARY The Italian scientists have a long tradition of studies and research on many large pelagic species including, among others, the small tunas. The various small tuna species are important for the Italian fishery since many centuries, mostly from a socio-economical point of view. Some non- indigenous species are now present in the ICCAT Convention area. This is the first attempt to list together the many papers published so far by Italian scientists, concerning the biology of these species, the fisheries and many other scientific and cultural issues. The aim of this paper is to provide an annotated bibliography, with specific key words, even if it is surely incomplete, because of the many papers published over the years. This bibliography, which includes 309 annotated citations, was set together to serve the scientists and to help them in finding some rare references that might be useful for their work. RÉSUMÉ Les scientifiques italiens ont une longue tradition d'études et de recherches sur de nombreuses de espèces de grands pélagiques y compris, entre autres, les espèces de thonidés mineurs. Les différentes espèces de thonidés mineurs sont importantes pour la pêche italienne depuis de nombreux siècles, principalement d'un point de vue socio-économique. Certaines espèces non autochtones sont maintenant présentes dans la zone de la Convention de l’ICCAT. Il s'agit de la première tentative de répertorier les nombreux articles publiés à ce jour par des scientifiques italiens concernant la biologie de ces espèces, les pêcheries et de nombreuses autres questions scientifiques et culturelles. -
Follow the Leader
Follow the leader With an eye to the future: addressing failures in the global management of Bigeye Tuna Mary Lack Acknowledgements Mary Lack is a consultant from Shellack Pty Ltd. International Affairs, National Marine Fisheries Service; and Mr. Ray Clarke of the Pacific Islands Regional Office of the National The author acknowledges, with much appreciation, the Marine Fisheries Service. contribution of Glenn Sant (TRAFFIC International) and Lorraine Hitch (WWF Australia) to this report. Officers from the TRAFFIC Preparation of this report was made possible with funding network provided invaluable advice on the availability of trade support from the David and Lucile Packard Foundation. information. Citation: This document should be cited as: Lack, M. (2007). The report also benefited greatly from the helpful and insightful With an eye to the future: addressing failures in the global comments provided by: Adam Langley, Principal Fisheries management of bigeye tuna. TRAFFIC International and WWF Scientist, Oceanic Fisheries Programme, Secretariat of the Australia. Pacific Community; Ms Deirdre Warner-Kramer and Ms Holly Cover photograph: Unloading tuna caught by longline in the Koehler, Office of Marine Conservation, US Department of Western Central Pacific Ocean. © SPC Oceanic Fisheries State; Ms Kelly Denit and Ms Kim Blankenbeker of the Office of Programme / Siosifa Fukofuka. © 2007 TRAFFIC International and WWF Australia. All or in part of this publication must credit WWF Australia and rights reserved TRAFFIC International as the copyright owner. All material appearing in this publication is copyrighted and The views of the authors expressed in this publication do not may be reproduced with permission. Any reproduction in full necessarily reflect those of TRAFFIC, WWF or IUCN. -
Skipjack Tuna (Katsuwonus Pelamis) Yellowfin Tuna (Thunnus Albacares)
Skipjack tuna (Katsuwonus pelamis) Yellowfin tuna (Thunnus albacares) © Monterey Bay Aquarium Indian Ocean Troll/Pole October 3, 2016 Alexia Morgan, Consulng Researcher Disclaimer Seafood Watch® strives to have all Seafood Reports reviewed for accuracy and completeness by external sciensts with experse in ecology, fisheries science and aquaculture. Scienfic review, however, does not constute an endorsement of the Seafood Watch® program or its recommendaons on the part of the reviewing sciensts. Seafood Watch® is solely responsible for the conclusions reached in this report. Table of Contents Table of Contents 2 About Seafood Watch 3 Guiding Principles 4 Summary 5 Final Seafood Recommendations 5 Introduction 7 Assessment 10 Criterion 1: Impacts on the species under assessment 10 Criterion 2: Impacts on other species 14 Criterion 3: Management Effectiveness 18 Criterion 4: Impacts on the habitat and ecosystem 25 Acknowledgements 28 References 29 Appendix A: Extra By Catch Species 31 Appendix B: Update Summary 32 2 About Seafood Watch Monterey Bay Aquarium’s Seafood Watch® program evaluates the ecological sustainability of wild-caught and farmed seafood commonly found in the United States marketplace. Seafood Watch® defines sustainable seafood as originang from sources, whether wild-caught or farmed, which can maintain or increase producon in the long-term without jeopardizing the structure or funcon of affected ecosystems. Seafood Watch® makes its science-based recommendaons available to the public in the form of regional pocket guides that can be downloaded from www.seafoodwatch.org. The program’s goals are to raise awareness of important ocean conservaon issues and empower seafood consumers and businesses to make choices for healthy oceans. -
C1. Tuna and Tuna-Like Species
163 C1. TUNA AND TUNA-LIKE SPECIES exceptional quality reached US$500 per kg and by Jacek Majkowski * more recently even more, but such prices referring to very few single fish do not reflect the INTRODUCTION situation with the market. Bigeye are also well priced on the sashimi markets. Although The sub-order Scombroidei is usually referred to yellowfin are also very popular on these markets, as tuna and tuna-like species (Klawe, 1977; the prices they bring are much lower. For Collette and Nauen, 1983; Nakamura, 1985). It is canning, albacore fetch the best prices due to composed of tunas (sometimes referred to as true their white meat, followed by yellowfin and tunas), billfishes and other tuna-like species. skipjack for which fishermen are paid much less They include some of the largest and fastest than US$1 per kg. The relatively low prices of fishes in the sea. canning-quality fish are compensated by their The tunas (Thunnini) include the most very large catches, especially in the case of economically important species referred to as skipjack and yellowfin. Longtail tuna principal market tunas because of their global (T. tonggol) is becoming increasingly important economic importance and their intensive for canning and the subject of substantial international trade for canning and sashimi (raw international trade. The consumption of tuna and fish regarded as delicacy in Japan and tuna-like species in forms other than canned increasingly, in several other countries). In fact, products and sashimi is increasing. the anatomy of some tuna species seems to have The tunas other than the principal market species been purpose-designed for canning and loining.