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© Iccat, 2007
A5 By-catch Species APPENDIX 5: BY-CATCH SPECIES A.5 By-catch species By-catch is the unintentional/incidental capture of non-target species during fishing operations. Different types of fisheries have different types and levels of by-catch, depending on the gear used, the time, area and depth fished, etc. Article IV of the Convention states: "the Commission shall be responsible for the study of the population of tuna and tuna-like fishes (the Scombriformes with the exception of Trichiuridae and Gempylidae and the genus Scomber) and such other species of fishes exploited in tuna fishing in the Convention area as are not under investigation by another international fishery organization". The following is a list of by-catch species recorded as being ever caught by any major tuna fishery in the Atlantic/Mediterranean. Note that the lists are qualitative and are not indicative of quantity or mortality. Thus, the presence of a species in the lists does not imply that it is caught in significant quantities, or that individuals that are caught necessarily die. Skates and rays Scientific names Common name Code LL GILL PS BB HARP TRAP OTHER Dasyatis centroura Roughtail stingray RDC X Dasyatis violacea Pelagic stingray PLS X X X X Manta birostris Manta ray RMB X X X Mobula hypostoma RMH X Mobula lucasana X Mobula mobular Devil ray RMM X X X X X Myliobatis aquila Common eagle ray MYL X X Pteuromylaeus bovinus Bull ray MPO X X Raja fullonica Shagreen ray RJF X Raja straeleni Spotted skate RFL X Rhinoptera spp Cownose ray X Torpedo nobiliana Torpedo -
Report on the Status of Mediterranean Chondrichthyan Species
United Nations Environment Programme Mediterranean Action Plan Regional Activity Centre For Specially Protected Areas REPORT ON THE STATUS OF MEDITERRANEAN CHONDRICHTHYAN SPECIES D. CEBRIAN © L. MASTRAGOSTINO © R. DUPUY DE LA GRANDRIVE © Note : The designations employed and the presentation of the material in this document do not imply the expression of any opinion whatsoever on the part of UNEP concerning the legal status of any State, Territory, city or area, or of its authorities, or concerning the delimitation of their frontiers or boundaries. © 2007 United Nations Environment Programme Mediterranean Action Plan Regional Activity Centre for Specially Protected Areas (RAC/SPA) Boulevard du leader Yasser Arafat B.P.337 –1080 Tunis CEDEX E-mail : [email protected] Citation: UNEP-MAP RAC/SPA, 2007. Report on the status of Mediterranean chondrichthyan species. By Melendez, M.J. & D. Macias, IEO. Ed. RAC/SPA, Tunis. 241pp The original version (English) of this document has been prepared for the Regional Activity Centre for Specially Protected Areas (RAC/SPA) by : Mª José Melendez (Degree in Marine Sciences) & A. David Macías (PhD. in Biological Sciences). IEO. (Instituto Español de Oceanografía). Sede Central Spanish Ministry of Education and Science Avda. de Brasil, 31 Madrid Spain [email protected] 2 INDEX 1. INTRODUCTION 3 2. CONSERVATION AND PROTECTION 3 3. HUMAN IMPACTS ON SHARKS 8 3.1 Over-fishing 8 3.2 Shark Finning 8 3.3 By-catch 8 3.4 Pollution 8 3.5 Habitat Loss and Degradation 9 4. CONSERVATION PRIORITIES FOR MEDITERRANEAN SHARKS 9 REFERENCES 10 ANNEX I. LIST OF CHONDRICHTHYAN OF THE MEDITERRANEAN SEA 11 1 1. -
Integrating Multiple Chemical Tracers to Elucidate the Diet and Habitat of Cookiecutter Sharks Aaron B
www.nature.com/scientificreports OPEN Integrating multiple chemical tracers to elucidate the diet and habitat of Cookiecutter Sharks Aaron B. Carlisle1*, Elizabeth Andruszkiewicz Allan2,9, Sora L. Kim3, Lauren Meyer4,5, Jesse Port6, Stephen Scherrer7 & John O’Sullivan8 The Cookiecutter shark (Isistius brasiliensis) is an ectoparasitic, mesopelagic shark that is known for removing plugs of tissue from larger prey, including teleosts, chondrichthyans, cephalopods, and marine mammals. Although this species is widely distributed throughout the world’s tropical and subtropical oceanic waters, like many deep-water species, it remains very poorly understood due to its mesopelagic distribution. We used a suite of biochemical tracers, including stable isotope analysis (SIA), fatty acid analysis (FAA), and environmental DNA (eDNA), to investigate the trophic ecology of this species in the Central Pacifc around Hawaii. We found that large epipelagic prey constituted a relatively minor part of the overall diet. Surprisingly, small micronektonic and forage species (meso- and epipelagic) are the most important prey group for Cookiecutter sharks across the studied size range (17–43 cm total length), with larger mesopelagic species or species that exhibit diel vertical migration also being important prey. These results were consistent across all the tracer techniques employed. Our results indicate that Cookiecutter sharks play a unique role in pelagic food webs, feeding on prey ranging from the largest apex predators to small, low trophic level species, in particular those that overlap with the depth distribution of the sharks throughout the diel cycle. We also found evidence of a potential shift in diet and/or habitat with size and season. -
Diet of Atlantic Sharpnose Shark, Rhizoprionodon Terraenovae, from the North-Central Gulf of Mexico: Initial Findings
Diet of Atlantic Sharpnose Shark, Rhizoprionodon terraenovae, from the North-central Gulf of Mexico: Initial Findings Estudios Preliminares de la Dieta del Cazón Picudo Atlántico, Rhizoprionodon terraenovae, de la Región Central del Norte del Golfo de México Régime Alimentaire du Requin Rhizoprionodon terraenovae dans la Partie Centre-Nord du Golfe du Mexique: Résultats Préliminaires JEREMY M. HIGGS1*, ERIC R. HOFFMAYER2, JILL M. HENDON1, and CHRISTOPHER M. BUTLER1 1The University of Southern Mississippi, Gulf Coast Research Laboratory, Center for Fisheries Research and Development, 703 East Beach Drive, Ocean Springs, Mississippi 39564 USA. *[email protected]. 2National Marine Fisheries Service, Southeast Fisheries Science Center, Mississippi Laboratories, Pascagoula, Mississippi 39567 USA. EXTENDED ABSTRACT The Atlantic sharpnose shark, Rhizoprionodon terraenovae, is a relatively small species of shark that inhabits the western Atlantic Ocean from Canada to Mexico (Compagno 1984) and is the most abundant shark species in the coastal waters of the northcentral Gulf of Mexico (ncGOM) (Parsons and Hoffmayer 2005, Hoffmayer et al. 2006, Parsons and Hoffmayer 2007). Atlantic sharpnose sharks can be caught with light fishing tackle and are frequently targeted by ncGOM recreational fishermen (Castro 2011). Atlantic sharpnose, like many shark species, are an upper trophic level predatory fish and play a key role in ecosystem dynamics and aid in maintaining the overall balance of the marine community (Cortés 1999). Understanding the diet of the Atlantic sharpnose shark can provide insight into the predator-prey interactions this species has in nearshore fish communities in the ncGOM. Atlantic sharpnose sharks were collected opportunistically from 2004 to 2010 during routine research cruises conducted in the Mississippi Sound, Chandeleur Sound, and adjacent waters. -
A Practical Key for the Identification of Large Fish Rostra 145-160 ©Zoologische Staatssammlung München/Verlag Friedrich Pfeil; Download
ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: Spixiana, Zeitschrift für Zoologie Jahr/Year: 2015 Band/Volume: 038 Autor(en)/Author(s): Lange Tabea, Brehm Julian, Moritz Timo Artikel/Article: A practical key for the identification of large fish rostra 145-160 ©Zoologische Staatssammlung München/Verlag Friedrich Pfeil; download www.pfeil-verlag.de SPIXIANA 38 1 145-160 München, August 2015 ISSN 0341-8391 A practical key for the identification of large fish rostra (Pisces) Tabea Lange, Julian Brehm & Timo Moritz Lange, T., Brehm, J. & Moritz, T. 2015. A practical key for the identification of large fish rostra (Pisces). Spixiana 38 (1): 145-160. Large fish rostra without data of origin or determination are present in many museum collections or may appear in customs inspections. In recent years the inclu- sion of fish species on national and international lists for the protection of wildlife resulted in increased trading regulations. Therefore, useful identification tools are of growing importance. Here, we present a practical key for large fish rostra for the families Pristidae, Pristiophoridae, Xiphiidae and Istiophoridae. This key allows determination on species level for three of four families. Descriptions of the rostrum characteristics of the respective taxa are given. Tabea Lange, Lindenallee 38, 18437 Stralsund Julian Brehm, Königsallee 5, 95448 Bayreuth Timo Moritz, Deutsches Meeresmuseum, Katharinenberg 14-20, 18439 Stralsund; e-mail: [email protected] Introduction Polyodon spathula is equipped with a spoon-like rostrum which is used as an electrosensory organ Rostra are found in many fish species and can for locating plankton in water columns (Wilkens & be used for hunting (Wueringer et al. -
Common Sharks of the Northern Gulf of Mexico So You Caught a Sand Shark?
Common Sharks of the Northern Gulf of Mexico So you caught a sand shark? Estuaries are ecosystems where fresh and saltwater meet The northern Gulf of Mexico is home to several shark and mix. Estuaries provide nursery grounds for a wide species. A few of these species very closely resemble variety of invertebrate species such as oysters, shrimp, one another and are commonly referred to as and blue crabs along finfishes including croaker, red “sand sharks.” drum, spotted seatrout, tarpon, menhaden, flounder and many others. This infographic will help you quickly differentiate between the different “sand sharks” and also help you Because of this abundance, larger animals patrol coastal identify a few common offshore species. Gulf waters for food. Among these predators are a number of shark species. Sharpnose (3.5 ft) Blacknose (4ft) Finetooth (4ft) Blacktip (5ft) Maximum size of Human (avg. 5.5ft) . the coastal Spinner (6ft) sharks are Bull (8ft) depicted in scale Silky (9ft) Scalloped Hammerhead (10ft) Great Hammerhead (13ft) Maximum Adult Size Adult Maximum Tiger (15ft) 5 ft 10 ft 15 ft Blacktip shark Atlantic sharpnose shark Carcharhinus limbatus Rhizoprionodon terraenovae Spinner shark Easy ID: White “freckles” on the body Easy ID: Pointed snout, anal fin lacks a black tip Carcharhinus brevipinna Finetooth shark Blacknose shark Carcharhinus isodon Carcharhinus acronotus Easy ID: Black tip on anal fin present Easy ID: Distinct lack of black markings on fins, extremely pointed snout Easy ID: Distinct black smudge on the tip of the snout, -
Novel Use of Pop-Up Satellite Archival Telemetry in Sawsharks: Insights Into the Movement of the Common Sawshark Pristiophorus Cirratus (Pristiophoridae)
Novel use of pop-up satellite archival telemetry in sawsharks: insights into the movement of the common sawshark Pristiophorus cirratus (Pristiophoridae) Patrick J Burke ( [email protected] ) Macquarie University https://orcid.org/0000-0002-7217-0215 Johann Mourier MARBEC, University of Montpellier, CNRS, IFREMER, IRD Troy F Gaston School of Environmental and Life Sciences, University of Newcastle Jane E Williamson Macquarie University, Department of Biological Sciences Telemetry case report Keywords: elasmobranch, satellite telemetry, diel vertical migration, tagging, Pristiophoridae, Australia, movement Posted Date: October 16th, 2020 DOI: https://doi.org/10.21203/rs.3.rs-31653/v2 License: This work is licensed under a Creative Commons Attribution 4.0 International License. Read Full License Version of Record: A version of this preprint was published on November 17th, 2020. See the published version at https://doi.org/10.1186/s40317-020-00222-y. Page 1/20 Abstract Background Understanding movement patterns of a species is vital for optimising conservation and management strategies. This information is often dicult to obtain in the marine realm for species that regularly occur at depth. The common sawshark (Pristiophorus cirratus) is a small, benthic associated elasmobranch species that occurs from shallow to deep-sea environments. No information is known regarding its movement ecology. Despite this, P. cirrata are still regularly landed as nontargeted catch in the south eastern Australian sheries. Three individuals were tagged with pop-up satellite archival tags (PSATs) off the coast of Tasmania, Australia, to test the viability of satellite tagging on these small elasmobranchs and to provide novel insights into their movement. -
Revised SEAFO Fisheries Resources Table 1. . FAO 3 Alfa Species Code
Revised SEAFO Fisheries Resources Table 1. Latin Name Transboundary FAO 3 Alfa Species Code TOP* Patagonian toothfish 1.1.1 Dissostichus 1.1.2 Yes eleginoides ORY* Orange Roughy Hoplosthethus spp Unknown ALF* Alfonsino Family Berycidae Unknown CGE* Deep-sea Red Crab Chaceon maritae Unknown MAC* Mackerel Scomber scombrus Unknown EDR* Armourhead Pseudopentaceros spp. Unknown BOC* Boarfish Capros aper Unknown ORD* Oreo dories Family Oreosomatidae Unknown CDL* Cardinal Fish Epigonus spp. Unknown OCZ* Octopus Family Octopodidae Unknown SQC* Squid Family Loliginidae Unknown WRF* Wreckfish 1.1.3 Polyprion 1.1.4 Unknown americanus SKA* Skates Family Rajidae Unknown DGS Spiny Dogfish Squalus acanthias Unknown Unknown ETB Blurred smooth Etmopterus bigelowi lanternshark ETH Shorttail Etmopterus brachyurus Unknown lanternshark ETR Great lanternshark Etmopterus princeps Unknown ETP Smooth lanternshark Etmopterus pusillus Unknown Unknown APA Ghost catshark Apristurus manis SSQ Velvet dogfish Scymnodon squamulosus Unknown CYO Portuguese Dogfish Centroscymnus coelolepis Unknown GUQ Leafscale Gulper Centrophorus squamosus Unknown Shark GUP Gulper Shark Centrophorus granulosus Unknown CFB ǂ Black dogfish Centroscyllium fabricii Unknown CYP ǂ Longnose velvet Centroscymnus crepidater Unknown 30 dogfish CYY Unknown ǂ Shortnose velvet Centroscymnus dogfish cryptacanthus SCK ǂ Kitefin shark Dalatias licha Unknown ETE ǂ Etmopterus compagnoi Unknown ETI ǂ Broadbanded Etmopterus gracilispinis Unknown lanternshark ETM ǂ Unknown Southern Etmopterus granulosus lanternshark -
Identifying Sharks and Rays
NSW DPI Identifying sharks and rays A guide for NSW commercial fishers Important If a shark or ray cannot be confidently identified using this guide, it is recommended that either digital images are obtained or the specimen is preserved. Please contact NSW DPI research staff for assistance: phone 1300 550 474 or email [email protected] Contents Introduction 4 How to use this guide 5 Glossary 6-7 Key 1 Whaler sharks and other sharks of similar appearance 8-9 to whalers – upper precaudal pit present Key 2 Sharks of similar appearance to whaler sharks – no 10 precaudal pit Key 3 Mackerel (great white and mako), hammerhead and 11 thresher sharks Key 4 Wobbegongs and some other patterned 12 bottom-dwelling sharks Key 5 Sawsharks and other long-snouted sharks and rays 13 2 Sandbar shark 14 Great white shark 42 Bignose shark 15 Porbeagle 43 Dusky whaler 16 Shortfin mako 44 Silky shark 17 Longfin mako 45 Oceanic whitetip shark 18 Thresher shark 46 Tiger shark 19 Pelagic thresher 47 Common blacktip shark 20 Bigeye thresher 48 Spinner shark 21 Great hammerhead 49 Blue shark 22 Scalloped hammerhead 50 Sliteye shark 23 Smooth hammerhead 51 Bull shark 24 Eastern angelshark 52 Bronze whaler 25 Australian angelshark 53 Weasel shark 26 Banded wobbegong 54 Lemon shark 27 Ornate wobbegong 55 Grey nurse shark 28 Spotted wobbegong 56 Sandtiger (Herbst’s nurse) shark 29 Draughtboard shark 57 Bluntnose sixgill shark 30 Saddled swellshark 58 Bigeye sixgill shark 31 Whitefin swellshark 59 Broadnose shark 32 Port Jackson shark 60 Sharpnose sevengill -
Uterine Fluid Composition of the Dwarf Ornate Wobbegong Shark (Orectolobus Ornatus) During Gestation
CSIRO PUBLISHING Marine and Freshwater Research, 2011, 62, 576–582 www.publish.csiro.au/journals/mfr Uterine fluid composition of the dwarf ornate wobbegong shark (Orectolobus ornatus) during gestation Megan T. EllisA,B and Nicholas M. OtwayA AIndustry and Investment NSW, Port Stephens Fisheries Institute, Taylors Beach, NSW 2316, Australia. BCorresponding author. Email: [email protected] Abstract. Low fecundity in chondrichthyans makes them extremely susceptible to fishing, so understanding the various reproductive strategies in this group is vital for management. Knowledge of the uterine fluid (UF) composition throughout gestation is fundamental to this understanding, yet is restricted to a few species. This study focussed on the UF composition of the wobbegong (Orectolobus ornatus), which inhabits coastal waters off eastern Australia. The UF was quantified throughout pregnancy. Fluids surrounding uterine eggs had a complex composition, with mean urea (98.48 mmol LÀ1), sodium (560.25 mmol LÀ1) and potassium (13.93 mmol LÀ1) concentrations significantly greater than those in seawater. A change in composition, from complex to simple, occurred after 3–4 months gestation. Major electrolyte concentrations then resembled seawater for the remainder of gestation, suggesting the flushing of the uteri with seawater and evidenced by fluctuating low levels of urea. The gestation period reflected the time for metabolism of yolk stores, osmotic and ionic adjustment, development of functioning immunological systems and prevention of external -
251 Part 640—Spiny Lobster Fishery of the Gulf Of
Fishery Conservation and Management Pt. 640 of an application for an ILAP or an ap- Sevengill, Heptranchias perlo peal of NMFS's denial of an initial lim- Sixgill, Hexanchus griseus ited access permit for swordfish. Smalltail, Carcharhinus porosus (12) Falsify information submitted Whale, Rhincodon typus White, Carcharodon carcharias under § 635.46(b) in support of entry of imported swordfish. TABLE 2 OF APPENDIX A TO PART 635± (13) Exceed the incidental catch re- DEEPWATER/OTHER SHARK SPECIES tention limits specified at § 635.24(b). Blotched catshark, Scyliorhinus meadi [64 FR 29135, May 28, 1999, as amended at 64 Broadgill catshark, Apristurus riveri FR 37705, July 13, 1999; 65 FR 42887, July 12, Chain dogfish, Scyliorhinus retifer Deepwater catshark, Apristurus profundorum 2000; 65 FR 47238, Aug. 1, 2000] Dwarf catshark, Scyliorhinus torrei Iceland catshark, Apristurus laurussoni APPENDIX A TO PART 635ÐSPECIES Marbled catshark, Galeus arae TABLES Smallfin catshark, Apristurus parvipinnis TABLE 1 OF APPENDIX A TO PART 635±OCEANIC Bigtooth cookiecutter, Isistius plutodus Blainville's dogfish, Squalus blainvillei SHARKS Bramble shark, Echinorhinus brucus A. Large coastal sharks: Broadband dogfish, Etmopterus gracilispinnis Caribbean lanternshark, Etmopterus hillianus 1. Ridgeback sharks: Cookiecutter shark, Isistius brasiliensis Sandbar, Carcharhinus plumbeus Cuban dogfish, Squalus cubensis Silky, Carcharhinus falciformis Flatnose gulper shark, Deania profundorum Tiger, Galeocerdo cuvieri Fringefin lanternshark, Etmopterus schultzi Great -
Deep−Water Chondrichthyans from the Early Miocene of the Vienna Basin (Central Paratethys, Slovakia)
Deep−water chondrichthyans from the Early Miocene of the Vienna Basin (Central Paratethys, Slovakia) CHARLIE J. UNDERWOOD and JAN SCHLÖGL Underwood, C.J. and Schlögl, J. 2013. Deep−water chondrichthyans from the Early Miocene of the Vienna Basin (Central Paratethys, Slovakia). Acta Palaeontologica Polonica 58 (3): 487–509. Sampling of latest Burdigalian (Miocene) silty clays from the Malé Karpaty Mountains in the Slovakia revealed a deep−water, low diversity shark fauna. The fauna is dominated by teeth of very small squaliform sharks, including two new species, Eosqualiolus skrovinai sp. nov. and Paraetmopterus horvathi sp. nov. The generic composition of the squaliform fauna is more similar to that known from the Eocene than that of today, suggesting a post–early Miocene fau− nal turnover within this clade, at least locally. Nectobenthic, non squaliform sharks are rare, but include the new sawshark species Pristiophorus striatus sp. nov., while minute teeth of an enigmatic taxon described here as Nanocetorhinus tuberculatus gen. et sp. nov. probably indicate the presence of a previously unrecorded planktivore. The unusual compo− sition of the fauna, with the complete absence of taxa known to be of medium to large size, suggests an unusual, and prob− ably very stressed, palaeoenvironment. Key words: Squaliformes, Dalatidae, Etmopteridae, Pristiophorus, sharks, Miocene, Slovakia, Paratethys. Charles J. Underwood [[email protected]], Department of Earth and Planetary Science, Birkbeck, Malet Street, London WC1E 7HX, UK; Jan Schlogl [[email protected]], Department of Geology and Paleontology, Faculty of Natural Sciences, Come− nius University, Mlynská dolina G1, 842 15 Bratislava, Slovakia. Received 1 September 2011, accepted 20 December 2011, available online 12 January 2012.