DOCSLIB.ORG

Some Biological Aspects and Molecular Variations in Frigate Tuna, Auxis Thazard of the Coastal Waters Around Sri Lanka †

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Some Biological Aspects and Molecular Variations in Frigate Tuna, Auxis Thazard of the Coastal Waters Around Sri Lanka † -1DWQ6FL)RXQGDWLRQ6UL/DQND DOI: http://dx.doi.org/10.4038/jnsfsr.v47i3.9427 RESEARCH ARTICLE Some biological aspects and molecular variations in frigate tuna, Auxis thazard of the coastal waters around Sri Lanka † D.R. Herath 1,3, H.A.C.C. Perera 2 and G.H.C.M. Hettiarachchi 3* 0DULQH%LRORJLFDO5HVRXUFHV'LYLVLRQ1DWLRQDO$TXDWLF5HVRXUFHV5HVHDUFKDQG'HYHORSPHQW$JHQF\&RORPER 'HSDUWPHQWRI=RRORJ\DQG(QYLURQPHQWDO0DQDJHPHQW8QLYHUVLW\RI.HODQL\D.HODQL\D 'HSDUWPHQWRI&KHPLVWU\)DFXOW\RI6FLHQFH8QLYHUVLW\RI&RORPER&RORPER Submitted: 29 August 2018; Revised: 25 March 2019; Accepted: 24 May 2019 Abstract: (frigate tuna), is a commercially $X[LV WKD]DUG INTRODUCTION LPSRUWDQW ¿VK VSHFLHV LQ 6UL /DQND $OWKRXJK 6UL /DQND LV fortunate to have a large resource of tuna, little information is available on the biology, genetics and stock structure of $X[LV WKD]DUG (frigate tuna), also called $ODJRGXZD $WKD]DUG . Hence, the present study was conducted to study the in the local market, is a very important neritic tuna biology, genetics and stock structure of $WKD]DUG in coastal species in Sri Lanka. There are three species of neritic ZDWHUVDURXQG6UL/DQND7KH¿VKVDPSOHVZHUHFROOHFWHGIURP tuna, (XWK\QQXV D৽QLV (kawakawa), $X[LV WKD]DUG October 2015 to September 2017 from day-boats operating in (frigate tuna) and $X[LVURFKHL (bullet tuna), commonly WKH:HVWHUQ1RUWK:HVWHUQ(DVWHUQDQG6RXWKHUQ3URYLQFHV occurring in the coastal waters of Sri Lanka. The neritic of Sri Lanka. For this period, the length-weight relationship tunas constitute approximately 13 % of the total tuna and Fulton’s condition factor (K) calculated for $ WKD]DUG production of the country (Bandaranayake & Maldeniya, using standard length measured in centimetres and weight 2012). In 2015, $WKD]DUG has contributed 38 % while measured in grams were shown as = 0.1091 3.3385 and 1.93, : / and have contributed 39 % and 23 %, respectively, indicating a relatively healthy growth pattern and $URFKHL (D৽QLV a comparatively unpolluted habitat. Studies on the stomach respectively to the total neritic tuna catch of Sri Lanka contents revealed that $WKD]DUG are non-selective carnivors, (Rathnasuriya et al. , 2017). A higher percentage of neritic IHHGLQJRQGLYHUVHDQLPDOSUH\LWHPVVXFKDVVPDOO¿VKVSHFLHV tuna production has been recorded from the Southern and shrimps and cephalopods available in the surrounding waters. 6RXWKHDVWHUQSDUWVRIWKHFRXQWU\ 3HUHUD et al ., 2014). It The fecundity of female $WKD]DUG was shown to be 48,056 has been reported that in the recent past, Sri Lanka, India, to 267,000 eggs. The calculated GSI values showed that the Indonesia and Iran together have accounted for 90 % of peak spawning period for male $WKD]DUG extends from May to $WKD]DUG catch of the world (IOTC, 2014). Frequently, August and for the females from May to July. The phylogenetic $WKD]DUG LVPLVLGHQWL¿HGDV $URFKHL and the catch is analysis of the mitochondrial D-loop region sequences of 75 reported as a combination of these two species. Neritic selected samples representing all the geographical regions tunas are caught by a variety of gear types, such as VWXGLHGVKRZHGWKDWWKH¿VKRIGL൵HUHQWUHJLRQVDUHFOXVWHULQJ gillnets, handline and troll-line in the coastal waters WRJHWKHU +HQFH IRU ¿VKHULHV PDQDJHPHQW VWUDWHJLHV around the country (IOTC, 2016). $WKD]DUG found in the coastal waters of the Western, North :HVWHUQ(DVWHUQDQG6RXWKHUQ3URYLQFHVRI6UL/DQNDFRXOG be considered as a single stock. However, there is very limited information available on the biology and stock structure of $WKD]DUG of the Keywords: $X[LVWKD]DUG , feeding, frigate tuna, growth, stock Indian Ocean (IOTC, 2016). The biology, genetics LGHQWL¿FDWLRQ DQG ¿VKHU\ RI $ WKD]DUG have been studied in India * Corresponding author ([email protected] ; https://orcid.org/0000-0002-9557-751X) † $PDMRUSDUWRIWKLVUHVHDUFKZDVSUHVHQWHGDQGSXEOLVKHGLQ3URFHHGLQJVRIWKH6RXWK$VLDQ%LRWHFKQRORJ\&RQIHUHQFH This article is published under the Creative Commons CC-BY-ND License (http://creativecommons.org/licenses/by-nd/4.0/). This license permits use, distribution and reproduction, commercial and non-commercial, provided that the original work is properly cited and is not changed in anyway. 0(7+2'2/2*< '5+HUDWKHWDO 6DPSOHFROOHFWLRQ (Ghosh et al. , 2012; Kumar et al ., 2012a) and Indonesia where, : LV WKH ERG\ ZHLJKW RI WKH ¿VK LQ J / is the (Noegroho et al ., 2013; Hamidi et al ., 2018). In addition, standard length in cm, a is the regression intercept and b Johnson et al . (2015) have carried out biological and LVWKHUHJUHVVLRQFRH൶FLHQWRUVORSHRIDSORWRIORJ: vs genetic studies on $ WKD]DUG and stated that a single log L (Froese, 2006). stock of $WKD]DUG exists throughout the Northern waters RI 7DQ]DQLD 3RSXODWLRQ JHQHWLF VWUXFWXUHV RI GL൵HUHQW Fulton’s condition factor (K) was estimated from the ௕ tuna species have been studied using various molecular followingܹ ൌ ܽܮ relationship: markers. Kunal et al . (2013) have used the mitochondrial COI region to study the variations in 7KXQQXVDOEDFDUHV ...(2) \HOORZ¿Q WXQD LQ ,QGLDQ ZDWHUV DQG PLWRFKRQGULDO ଷ ܭ ൌ ͳͲͲܹȀܮ D-loop sequencing has been the choice of marker for the where, / is the standard length in cm and : is the weight VWXG\RIORQJWDLOWXQDLQWKH,QGR3DFL¿FEDVLQ :LOOHWWH in g (Sarkar et al ., 2013). et al ., 2015) and for the study of variations in Auxis species ሺሻ in the South China and Java Seas (Habib & Sulaiman, ሺ ሻ ൌ ൈ ͳͲͲ 7KHSK\ORJHQHWLFUHODWLRQVKLSEHWZHHQ¿YHWXQD ሺሻ species has been analysed using the mitochondrial D-loop sequences (Kumar et al ., 2014), and the genetic stocks of skipjack tuna in the Northwestern Indian Ocean have been studied using mitochondrial DNA and microsatellites (Dammannagoda et al. , 2011). Although a few biological studies have been carried out in Sri Lanka on $ WKD]DUG , genetic studies have not yet been carried out. Hence, studying the biology, reproduction and genetic stock structure of $WKD]DUG is very important as this information can be compared with the information available for the region to manage the VWRFNVRIWKLVYDOXDEOHFRPPHUFLDO¿VKHU\UHVRXUFH METHODOLOGY Sample collection A total of 405 $ WKD]DUG ¿VK VDPSOHV ZHUH FROOHFWHG from the coastal areas of Chilaw and Kalpitiya in the 1RUWKZHVWHUQ3URYLQFH1HJRPERDQG%HUXZHODLQWKH :HVWHUQ 3URYLQFH 'RGDQGXZD *DOOH :HOLJDPD DQG 0LULVVD LQ WKH 6RXWKHUQ 3URYLQFH DQG 7ULQFRPDOHH LQ WKH(DVWHUQ3URYLQFHRI6UL/DQND )LJXUH 6DPSOLQJ )LJXUH0DSRI6UL/DQNDVKRZLQJWKHVDPSOLQJORFDWLRQVFigure 1: Map of Sri Lanka showing the sampling was carried out from October 2015 to September 2017 locations from day-boats, which had gone to sea in the evening and returned the next day morning. Feeding and spawning of A. thazard Morphological and biological analysis of A. thazard The $ WKD]DUG ¿VK VDPSOHV ZHUH GLVVHFWHG DQG WKH Biological analysis was carried out for the 405 $WKD]DUG stomachs were weighed to the nearest 0.1 g. The ¿VK VDPSOHV WKDW ZHUH FROOHFWHG IURP DOO VDPSOLQJ stomachs were then cut open and according to the locations. Weight to the nearest 0.1 g and standard length stomach fullness observed visually, it was categorised 6/ WRWKHQHDUHVWFPRIWKH¿VKZHUHUHFRUGHG7KH into 5 classes: full, three fourths (3/4) full, half (1/2) full, relationship between standard length and weight of the one fourth (1/4) full and empty. The prey items were VDPSOHG¿VKZDVHYDOXDWHGXVLQJWKHIROORZLQJHTXDWLRQ VHSDUDWHG WR LGHQWLI\ WKH GL൵HUHQW FDWHJRULHV RI IRRG LWHPV ¿VKFUXVWDFHDQVFHSKDORSRGVHWF WKDWFRXOGEH ...(1) found within the stomach cavities. The weight of each ௕ ܹ ൌ ܽܮ September 2019 Journal of the National Science Foundation of Sri Lanka 47(3) ଷ ܭ ൌ ͳͲͲܹȀܮ ሺሻ ሺ ሻ ൌ ൈ ͳͲͲ ሺሻ %LRORJ\DQGJHQHWLFVRI$X[LVWKD]DUGRI6UL/DQND category of prey item was recorded to the nearest 0.1 g samples according to the following equation (Adebiyi, (Hyslop, 1980). The gonads were analysed to determine 2013): WKHVH[RIHDFK¿VKDQGWKHPDWXULW\VWDJHZDVGHWHUPLQHG XVLQJDPDWXULW\VFDOH PRGL¿HGIURP+ROGHQ 5DLWW 1974) given in Table 1. The weight of the gonads and ሺሻ ሺ ሻ ൌ ൈ ͳͲͲ maturity stages were recorded. Fecundity was calculated ሺሻ ...(3) by counting the number of eggs in a known quantity of preserved mature stage IV female gonads. Gonado ZKHUH6RPDWLFZHLJKWRI¿VK >WRWDOZHLJKWRI¿VK± somatic index (GSI) was calculated for male and female (gonad weight + stomach weight)] weighed in g. Table 1: 0DWXULW\VFDOHXVHGIRUWKHLGHQWL¿FDWLRQRIJRQDGDOVWDJHVRIPDOHDQGIHPDOH $WKD]DUG PRGL¿HGIURP+ROGHQ 5DLWW 1974). Female Male 6WDJH, 9HU\WKLQDQGWUDQVOXFHQWWXEHOLNH 9HU\WKLQDQGWUDQVOXFHQWHORQJDWHGDQGÀDWWHQHG (Immature) reaching less than 1/3 of the body cavity reaching less than 1/3 of the body cavity, whitish in colour 6WDJH,, 0RUHWKDQWKHERG\FDYLW\WXEHOLNH (ORQJDWHGDQGÀDWWHQHGZKLWLVKPRUHWKDQWKH (Maturing) body cavity Stage III Reaching 2/3 of the body cavity, tube-like, Reaching 2/3 of the body cavity, elongated, cream coloured (Mature/ripening) reddish in colour 6WDJH,9 5RXQGHGUHGLQFRORXUODUJHDQGIXOORIHJJV (ORQJDWHGFUHDPFRORXUHGZLWKVXSHU¿FLDOUHGEORRGYHVVHOV 5LSH ZLWKVXSHU¿FLDOEORRGYHVVHOV Stage V Reddish yellow, with remnants of eggs Whitish and shrunken (Spent) visible, shrunken A. thazard Molecular analysis of MgCl 2. Forward and reverse sequences were obtained for each sample and the consensus sequences were Tissue samples of 75 randomly selected $ WKD]DUG derived by using BioEdit version 7.0.5.3. These samples collected from all the locations were used for VHTXHQFHV ZHUH XVHG WR FRQ¿UP WKH LGHQWLW\ RI WKH total genomic DNA extraction using a standard phenol ¿VK VSHFLHV XVLQJ 1&%, EODVW IDFLOLW\ $ PD[LPXP chloroform
Load more

Recommended publications
  • 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.
    [Show full text]
  • 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 ...............................................................................................................
    [Show full text]
  • 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).
    [Show full text]
  • 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.
    [Show full text]
  • 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.
    [Show full text]
  • 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.
    [Show full text]
  • 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.
    [Show full text]
  • © Iccat, 2007
    2.1.10.3 FRI CHAPTER 2.1.10.3 AUTHORS: LAST UPDATE: FRIGATE TUNA J. VALEIRAS and E. ABAD Sept. 4, 2006 2.1.10.3 Description of Frigate Tuna (FRI) 1. Names 1.a Classification and taxonomy Species name: Auxis thazard (Lacepède 1800) ICCAT species code: FRI ICCAT names: Frigate tuna (English), Auxide (French), Melva (Spanish) According to Collette and Nauen (1983), the frigate tuna is classified as follows: • Phylum: Chordata • Subphylum: Vertebrata • Superclass: Gnathostomata • Class: Osteichthyes • Subclass: Actinopterygii • Order: Perciformes • Suborder: Scombroidei • Family: Scombridae Some authors have used the name Auxis thazard as including Auxis rochei in the belief that there was only a single worldwide species of Auxis (Collette and Nauen 1983). Most of the published data on biological parameters of Auxis in Atlantic ocean are from Auxis rochei. 1.b Common names List of vernacular names used according to ICCAT, FAO and Fishbase (www.fishbase.org). The list is not exhaustive and some local names might not be included. Angola: Chapouto, Judeo. Australia: Frigate mackerel, Leadenall. Brazil: Albacora-bandolim, Bonito, Bonito-cachorro, Cachorro, Cadelo, Cavala, Judeu, Serra. Cape Verde: Cachorra, Cachorrinha, Chapouto, Gaiado, Judeo-liso, Judeu, Merma, Panguil, Serra. China: ᅭ⯦㫎, ᡥ⯦㫎. Chinese Taipei: ᡥⰼ㫎. Cuba: Melva aletilargo. Denmark: Auxide. Djibouti: Auxide, Frigate tuna. Dominican Republic: Bonito. Ecuador: Botellita. Finland: Auksidi. France: Auxide. Germany: Fregattmakrele. Greece: ȉȠȣȝʌĮȡȑȜȚ, ȀȠʌȐȞȚ, ȀȠʌĮȞȐțȚ, ǺĮȡİȜȐțȚ, Kopani-Kopanaki.
    [Show full text]
  • Vertical and Onshore-Offshore Distributional Patterns of Tuna Larvae in Relation to Physical Habitat Features
    MARINE ECOLOGY PROGRESS SERIES Published April 21 Mar. Ecol. Prog. Ser. 1 Vertical and onshore-offshore distributional patterns of tuna larvae in relation to physical habitat features George W. ~oehlert',~~*, Bruce C. Mundyl 'Honolulu Laboratory, Southwest Fisheries Science Center, National Marine Fisheries Service, 2570 Dole St.. Honolulu, Hawaii 96822-2396, USA 'Joint Institute of Marine and Atmospheric Research, University of Hawaii. Honolulu. Hawaii 96922, USA ABSTRACT: The seasonal and spatial distributions of larval scombrids in waters off Oahu, Hawaii, were studied in September and December 1985 and April and June 1986 to determine vertical and onshore-offshore patterns. Horizontal distribution was resolved by sampling transects of 3 stations on the windward (east; 3.7, 9.3, and 27.8 km offshore) and leeward (west; 1.8, 9.3, and 27.8 km offshore) sides of the island. Vertical distribution was resolved by sampling with MOCNESS and Manta nets in 8 depth strata (0 to 80 m) at the 2 nearshore stations and 9 depth strata (0to 200 m) at the 4 offshore sta- tions. Scombrid larvae were abundant in all months except December. Collections in September and June were dominated by Thunnus spp.; about half were large enough to be identified to species and were predominantly T. albacares. Thunnus spp. generally were most abundant closest to shore on the leeward slde of the island. Larval Thunnus were not taken at > 60 m, were most abundant in the upper 20 m, and were captured in the neuston at night but rarely in daytime. The other 2 dominant larval scombrids, Katsuwonus pelamis and Auxis spp.
    [Show full text]
  • FAO Fisheries & Aquaculture
    Food and Agriculture Organization of the United Nations Fisheries and for a world without hunger Aquaculture Department Biological characteristics of tuna Tuna and tuna-like species are very important economically and a significant Related topics source of food, with the so-called principal market tuna species - skipjack, yellowfin, bigeye, albacore, Atlantic bluefin, Pacific bluefin (those two species Tuna resources previously considered belonging to the same species referred as northern bluefin) Tuna fisheries and and southern bluefin tuna - being the most significant in terms of catch weight and utilization trade. These pages are a collection of Fact Sheets providing detailed information on tuna and tuna-like species. Related information FAO FishFinder Aquatic Species - fact Table of Contents sheets Taxonomy and classification Related activities Morphological characteristics FAO activities on tuna Geographical distribution Habitat and biology Trophic relations and growth Reproduction Bibliography Taxonomy and classification [ Family: Scombridae ] : Scombrids [ Family: Istiophoridae Family: Xiphiidae ] : Billfishes Upper systematics of tunas and tuna-like species Scombrids and billfishes belong to the suborder of the Scombroidei which position is shown below: Phylum : Chordata └─ Subphylum Vertebrata └─ Superclass Gnathostomata └─ Class Osteichthyes └─ Subclass Actinopterygii └─ Infraclass Teleostei └─ Superorder Acanthopterygii └─ Order Perciformes ├─ Suborder Scombroidei | └─ Family Scombridae └─ Suborder Xiphioidei FAO Fisheries
    [Show full text]
  • The Italian Annotated Bibliography on Albacore (Thunnus Alalunga, Bonnaterre, 1788)
    SCRS/2019/156 Collect. Vol. Sci. Pap. ICCAT, 76(8): 7-39 (2020) THE ITALIAN ANNOTATED BIBLIOGRAPHY ON ALBACORE (THUNNUS ALALUNGA, BONNATERRE, 1788) F. Garibaldi1, P. Addis2, A. Di Natale3, C. Piccinetti4, F. Tinti5 SUMMARY The Italian scientists have a long tradition of studies and research on albacore (Thunnus alalunga). This species is one of the most important for the Italian fishery since many centuries, even if it was often neglected. This is the first attempt to list together the many papers published so far by Italian scientists, concerning the biology of this species, the fisheries and many other scientific and cultural issues. The aim of this paper is to provide a sort of annotated bibliography, with specific key words, even if it is surely incomplete, because of the many papers published over the years. So far, we found 164 papers on albacore. This updated bibliography 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 le germon (Thunnus alalunga). Cette espèce est l'une des plus importantes pour la pêche italienne depuis de nombreux siècles, même si elle a été souvent négligée. Il s'agit de la première tentative de répertorier les nombreux articles publiés à ce jour par des scientifiques italiens concernant la biologie de cette espèce, les pêcheries et de nombreuses autres questions scientifiques et culturelles. Le but de ce document est de fournir une sorte de bibliographie annotée, avec des mots clés spécifiques, même si elle est sûrement incomplète, en raison des nombreux articles publiés au cours des années.
    [Show full text]
  • Frigate Tuna Updated: December 2016
    Frigate tuna Updated: December 2016 FRIGATE TUNA SUPPORTING INFORMATION (Information collated from reports of the Working Party on Neritic Tunas and other sources as cited) CONSERVATION AND MANAGEMENT MEASURES Frigate tuna (Auxis thazard) in the Indian Ocean is currently subject to a number of Conservation and Management Measures adopted by the Commission: • Resolution 15/01 on the recording of catch and effort by fishing vessels in the IOTC area of competence • Resolution 14/05 concerning a record of licensed foreign vessels fishing for IOTC species in the IOTC area of competence and access agreement information • Resolution 15/11 on the implementation of a limitation of fishing capacity of Contracting Parties and Cooperating Non-Contracting Parties • Resolution 15/02 mandatory statistical reporting requirements for IOTC Contracting Parties and Cooperating non-Contracting Parties (CPCs) • Resolution 10/08 concerning a record of active vessels fishing for tunas and swordfish in the IOTC area FISHERIES INDICATORS Frigate tuna: General Frigate tuna (Auxis thazard) is a highly migratory species found in both coastal and oceanic waters. It is highly gregarious and often schools with other Scombrids. Table 1 outlines some key life history parameters relevant for management. TABLE 1. Frigate tuna: Biology of Indian Ocean frigate tuna (Auxis thazard). Parameter Description Range and Little is known on the biology of frigate tuna in the Indian Ocean. Highly migratory species found in both coastal and oceanic stock structure waters. It is highly gregarious and often schools with other Scombrids. Frigate tuna feeds on small fish, squids and planktonic crustaceans (e.g. decapods and stomatopods). Because of their high abundance, frigate tuna are considered to be an important prey for a range of species, especially the commercial tunas.
    [Show full text]