DOCSLIB.ORG

A First Record of the Smallfin Gulper Shark Centrophorus Moluccensis Bleeker, 1860 (Chondrichthyes

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
A First Record of the Smallfin Gulper Shark Centrophorus Moluccensis Bleeker, 1860 (Chondrichthyes OPEN ACCESS The Journal of Threafened Taxa fs dedfcafed fo bufldfng evfdence for conservafon globally by publfshfng peer-revfewed arfcles onlfne every monfh af a reasonably rapfd rafe af www.fhreafenedfaxa.org . All arfcles publfshed fn JoTT are regfsfered under Creafve Commons Afrfbufon 4.0 Infernafonal Lfcense unless ofherwfse menfoned. JoTT allows unresfrfcfed use of arfcles fn any medfum, reproducfon, and dfsfrfbufon by provfdfng adequafe credff fo fhe aufhors and fhe source of publfcafon. Journal of Threafened Taxa Bufldfng evfdence for conservafon globally www.fhreafenedfaxa.org ISSN 0974-7907 (Onlfne) | ISSN 0974-7893 (Prfnf) Shorf Communfcaffon A ffrsf record of fhe Smallffn Gulper Shark Cenfrophorus moluccensfs Bleeker, 1860 (Chondrfchfhyes: Squalfformes: Cenfrophorfdae) from fhe Andaman & Nfcobar wafers, Indfan EEZ H.D. Pradeep, Swapnfl S. Shfrke, M. Nashad & Monalfsha Devf Sukham 26 November 2017 | Vol. 9| No. 11 | Pp. 10899–10903 10.11609/jof. 3315 .9. 11. 10899-10903 For Focus, Scope, Afms, Polfcfes and Gufdelfnes vfsff hfp://fhreafenedfaxa.org/Abouf_JoTT For Arfcle Submfssfon Gufdelfnes vfsff hfp://fhreafenedfaxa.org/Submfssfon_Gufdelfnes For Polfcfes agafnsf Scfenffc Mfsconducf vfsff hfp://fhreafenedfaxa.org/JoTT_Polfcy_agafnsf_Scfenffc_Mfsconducf For reprfnfs confacf <[email protected]> Publfsher/Hosf Parfner Threafened Taxa Journal of Threatened Taxa | www.threatenedtaxa.org | 26 November 2017 | 9(11): 10899–10903 A first record of the Smallfin Gulper Shark Centrophorus moluccensis Bleeker, 1860 (Chondrichthyes: Squaliformes: Centrophoridae) from the Andaman & Nicobar ISSN 0974-7907 (Online) waters, Indian EEZ ISSN 0974-7893 (Print) Communication Short H.D. Pradeep 1, Swapnil S. Shirke 2, M. Nashad 3 & Monalisha Devi Sukham 4 OPEN ACCESS 1 Fishery Survey of India, Mormugao Zonal Base, Opp. Microwave Station, Bogda Road, Mormugao, Goa 403803, India 2,3 Fishery Survey of India, Port Blair Zonal Base, Port Blair, Andaman and Nicobar Islands 744101, India 4 Fisheries Resource Management Division, Central Island Agriculture Research Institute, ICAR, Port Blair-744105, Andaman and Nicobar Islands, India 1 [email protected] (corresponding author), 2 [email protected], 3 [email protected], 4 [email protected] Abstract: The Smallfin Gulper Shark Centrophorus moluccensis is in a number of countries, poor sampling and taxonomic reported for the first time from the Andaman & Nicobar waters of the confusion has made identification of Centrophorus spp. Indian EEZ. A male specimen of 785mm total length and weighing 2.34kg was landed by a motorized longliner at Burmanallah, South often problematic (Compagno 1984; Muñoz-Chápuli Andaman District. The specimen was caught off Chidiyatapu, South & Ramos 1989; Compagno et al. 1989, 2005). Seven Andaman at a depth of 250m. A detailed morphological description Centrophorus of the specimen and comparison with previous literature is provided. species are reported to occur in Indian waters: Centrophorus granulosus (Bloch & Schneider Keywords: Andaman & Nicobar Islands, Centrophoridae, Dogfish 1801); C. uyato Rafinesque 1810;C. moluccensis Bleeker Shark, longline, new report, squalene. 1860; C. lusitanicus Bocage & Capello 1864; C. acus Abbreviations: HL - head length; PCL - pre-caudal length; TL - total Garman 1906; C. squamosus Bonnaterre 1788 and C. length atromarginatus Garman 1913 (Nair & Mohan 1970; Appukuttan & Nair 1988; Raje et al. 2002; Venu & Kurup Gulper sharks Centrophorus spp. are commercially 2002; Soundararajan & Roy 2004; Titto D’Cruz 2004; exploited for food and high squalene content in their Jayaprakash et al. 2006; Raje et al. 2007; CMFRI 2007; livers (Compagno 1984; Gordon 1999; Daley et al. Joshi et al. 2008; Vivekanandan & Sivaraj 2008). 2002). They generally occur on upper continental and The global distribution of the Smallfin Gulper Shark is insular slopes between 200–2400 m depth (Compagno uncertain due to taxonomic issues. It has been reported 1984; Last & Stevens 1994; Andrew et al. 1997; Graham from sporadic locations through the western Indian et al. 2001; Compagno et al. 2005). Despite their Ocean: India, South Africa, and southern Mozambique. importance as commercial target and by-catch species The most abundant distribution was noted in the Indo- DOI: http://doi.org/10.11609/jott.3315.9.11.10899-10903 | ZooBank: urn:lsid:zoobank.org:pub:2C8A02C9-AED7-49E3-8392-29ED6DF84FB1 Editor: E. Vivekanandan, Central Marine Fisheries Research Institute, Chennai, India. Date of publication: 26 November 2017 (online & print) Manuscript details: Ms # 3315 | Received 02 February 2017 | Final received 08 November 2017 | Finally accepted 12 November 2017 Citation: Pradeep, H.D., S.S. Shirke, M. Nashad & M.D. Sukham (2017). A first record of the Smallfin Gulper Shark Centrophorus moluccensis Bleeker, 1860 (Chondrichthyes: Squaliformes: Centrophoridae) from the Andaman & Nicobar waters, Indian EEZ. Journal of Threatened Taxa 9(11): 10899–10903; http://doi. org/10.11609/jott.3315.9.11.10899-10903 Copyright: © Pradeep et al. 2017. Creative Commons Attribution 4.0 International License. JoTT allows unrestricted use of this article in any medium, reproduction and distribution by providing adequate credit to the authors and the source of publication. Funding: None. Competing interests: The authors declare no competing interests. Acknowledgements: The authors are thankful to the Director General, Fishery Survey of India, Mumbai for his encouragement during the study period. They also express their sincere thanks to Shri. Ilairaja, fisherman of Burmanallah, South Andaman District for his kind help in sampling. Further, the authors are thankful to the anonymous reviewers of the manuscript. 10899 Ffrsf record of Smallfn Gulper Shark from Andaman wafers Pr adeep ef al. Ffgure 1. Map showfng fhe samplfng sfafon. Courfesy: M. Nashad Wesf Pacffc regfon, fncludfng easfern and wesfern whfch are exclusfvely fshed for squalene confenf fn Ausfralfa, New Caledonfa, Indonesfa, Phflfppfnes, fhefr lfver fn fhese Islands. The specfmen was fdenffed Malaysfa, Tafwan and Japan (Compagno 1984; Talwar & followfng Compagno & Nfem (1998), phofographed Jhfngran 1991; Lasf & Sfevens 2009; Ahmad & Lfm 2012). and morphomefrfc dafa were recorded. Morphomefrfc From Indfan wafers, ff fs reporfed from fhe soufhwesfern measuremenfs of fhe fresh specfmen were faken coasf and Gulf of Mannar (Sflas 1969; Hamsa ef al. 1991) followfng Compagno (1984) wffh a few modffcafons. buf defafled morphomefrfc descrfpfon of fhe specfes The phofos of fhe scales were faken by Olympus CX fs lackfng. From Andaman & Nfcobar wafers fll foday 41 frfnocular mfcroscope wffh 10x magnffcafon. only fwo squalfform dog fshes, Cenfrophorus acus All proporfonal measuremenfs are expressed as and Squalus megalops are reporfed (Soundararajan & percenfage of fofal lengfh (TL) along wffh orfgfnal dafa. Roy 2004). The presenf sfudy reporfs fhe occurrence The specfmen fs deposffed fn fhe museum of Zonal Base of C. moluccensfs from fhe Andaman & Nfcobar wafers of Ffshery Survey of Indfa, Porf Blafr (Referral No. MUS. of fhe Indfan Exclusfve Economfc Zone (EEZ) for fhe frsf FSI.PB/EB/07/2016). fme, along wffh ffs morphomefrfc defafls. Resulfs Maferfals and Mefhods Sysfemafcs The sample was collecfed from fhe landfng cenfre Order: Squalfformes Compagno, 1973 af Burmanallah, Soufh Andaman Dfsfrfcf (Ffg. 1) on Famfly: Cenfrophorfdae Bleeker, 1859 23 July 2016, landed by a moforfzed fshfng boaf. The Genus: Cenfrophorus Müller & Henle, 1837 specfmen was capfured by longlfne gear af a depfh of Cenfrophorus moluccensfs Bleeker, 1860 250m of Chfdfyafapu, Soufh Andaman Dfsfrfcf. A sfngle (Image 1) male specfmen of Cenfrophorus moluccensfs Bleeker, Specfmen Examfned: C. moluccensfs Bleeker, 1860: 1860 was landed along wffh ofher specfes of Squalfdae, Male (adulf), 785mm fofal lengfh (TL), 2.34kg fofal 10900 Journal of Threafened Taxa | www.fhreafenedfaxa.org | 26 November 2017 | 9(11): 10899–10903 Ffrsf record of Smallfn Gulper Shark from Andaman wafers Pr adeep ef al. © H.D. Pradeep Image 1. Dorsolaferal vfew of C. moluccensfs Bleeker, 1860 wefghf. Mozambfque wafers (Hamsa ef al. 1991). The IUCN Dfagnosfs: Body elongafed and slfghfly compressed; Red Lfsf of Threafened Specfes lfsfs fhe sfafus of C. snouf pofnfed, feefh fn fhe fwo jaws markedly dfferenf, moluccensfs as “Dafa Defcfenf” (Graham & Kyne 2013) small and wffh a sfngle cusp, lower feefh much larger and fhe sfafus of ffs easfern Ausfralfan subpopulafon fs fhan upper (Image 2). Two dorsal fns; orfgfn of frsf “Near Threafened” (Graham 2013). dorsal fn close behfnd pecforal fn bases; each dorsal The dfversffy of fhe elasmobranch fn fhe Indfan EEZ fn wffh a spfne on ffs anferfor margfn. Second dorsal needs fo be sfudfed fn defafl. Sflas (1969) recorded fhe fn very small, ½ hefghf of frsf dorsal fn or less, wffh occurrence of C. moluccensfs fn fhe frawl cafches from spfne orfgfn usually well posferfor fo pelvfc fn rear fps. fhe upper confnenfal slope of fhe soufhwesf coasf of Caudal fn wffh sub fermfnal nofch. Caudal peduncle Indfa af depfhs of 180–450 m. A rare case of landfngs of wffhouf dermal keels and precaudal pffs. Dermal C. moluccensfs occurred fn Veerapandfpafnam, Gulf of denfcles of back wfdely separafed and nof overlappfng, Mannar af a depfh of 200m (Hamsa ef al. 1991). low-crowned, broad wffh low rfdges runnfng fhe lengfh Idenffcafon of Cenfrophorus spp. can be dffculf of fhe crown and a shorf cusp on fhefr posferfor edges owfng fo faxonomfc confusfon; however fhe
Load more

Recommended publications
  • Sharks in Crisis: a Call to Action for the Mediterranean
    REPORT 2019 SHARKS IN CRISIS: A CALL TO ACTION FOR THE MEDITERRANEAN WWF Sharks in the Mediterranean 2019 | 1 fp SECTION 1 ACKNOWLEDGEMENTS Written and edited by WWF Mediterranean Marine Initiative / Evan Jeffries (www.swim2birds.co.uk), based on data contained in: Bartolí, A., Polti, S., Niedermüller, S.K. & García, R. 2018. Sharks in the Mediterranean: A review of the literature on the current state of scientific knowledge, conservation measures and management policies and instruments. Design by Catherine Perry (www.swim2birds.co.uk) Front cover photo: Blue shark (Prionace glauca) © Joost van Uffelen / WWF References and sources are available online at www.wwfmmi.org Published in July 2019 by WWF – World Wide Fund For Nature Any reproduction in full or in part must mention the title and credit the WWF Mediterranean Marine Initiative as the copyright owner. © Text 2019 WWF. All rights reserved. Our thanks go to the following people for their invaluable comments and contributions to this report: Fabrizio Serena, Monica Barone, Adi Barash (M.E.C.O.), Ioannis Giovos (iSea), Pamela Mason (SharkLab Malta), Ali Hood (Sharktrust), Matthieu Lapinksi (AILERONS association), Sandrine Polti, Alex Bartoli, Raul Garcia, Alessandro Buzzi, Giulia Prato, Jose Luis Garcia Varas, Ayse Oruc, Danijel Kanski, Antigoni Foutsi, Théa Jacob, Sofiane Mahjoub, Sarah Fagnani, Heike Zidowitz, Philipp Kanstinger, Andy Cornish and Marco Costantini. Special acknowledgements go to WWF-Spain for funding this report. KEY CONTACTS Giuseppe Di Carlo Director WWF Mediterranean Marine Initiative Email: [email protected] Simone Niedermueller Mediterranean Shark expert Email: [email protected] Stefania Campogianni Communications manager WWF Mediterranean Marine Initiative Email: [email protected] WWF is one of the world’s largest and most respected independent conservation organizations, with more than 5 million supporters and a global network active in over 100 countries.
    [Show full text]
  • An Introduction to the Classification of Elasmobranchs
    An introduction to the classification of elasmobranchs 17 Rekha J. Nair and P.U Zacharia Central Marine Fisheries Research Institute, Kochi-682 018 Introduction eyed, stomachless, deep-sea creatures that possess an upper jaw which is fused to its cranium (unlike in sharks). The term Elasmobranchs or chondrichthyans refers to the The great majority of the commercially important species of group of marine organisms with a skeleton made of cartilage. chondrichthyans are elasmobranchs. The latter are named They include sharks, skates, rays and chimaeras. These for their plated gills which communicate to the exterior by organisms are characterised by and differ from their sister 5–7 openings. In total, there are about 869+ extant species group of bony fishes in the characteristics like cartilaginous of elasmobranchs, with about 400+ of those being sharks skeleton, absence of swim bladders and presence of five and the rest skates and rays. Taxonomy is also perhaps to seven pairs of naked gill slits that are not covered by an infamously known for its constant, yet essential, revisions operculum. The chondrichthyans which are placed in Class of the relationships and identity of different organisms. Elasmobranchii are grouped into two main subdivisions Classification of elasmobranchs certainly does not evade this Holocephalii (Chimaeras or ratfishes and elephant fishes) process, and species are sometimes lumped in with other with three families and approximately 37 species inhabiting species, or renamed, or assigned to different families and deep cool waters; and the Elasmobranchii, which is a large, other taxonomic groupings. It is certain, however, that such diverse group (sharks, skates and rays) with representatives revisions will clarify our view of the taxonomy and phylogeny in all types of environments, from fresh waters to the bottom (evolutionary relationships) of elasmobranchs, leading to a of marine trenches and from polar regions to warm tropical better understanding of how these creatures evolved.
    [Show full text]
  • Identification Guide to the Deep-Sea Cartilaginous Fishes Of
    Identification guide to the deep–sea cartilaginous fishes of the Southeastern Atlantic Ocean FAO. 2015. Identification guide to the deep–sea cartilaginous fishes of the Southeastern Atlantic Ocean. FishFinder Programme, by Ebert, D.A. and Mostarda, E., Rome, Italy. Supervision: Merete Tandstad, Jessica Sanders (FAO, Rome) Technical editor: Edoardo Mostarda (FAO, Rome) Colour illustrations, cover and graphic design: Emanuela D’Antoni (FAO, Rome) This guide was prepared under the “FAO Deep–sea Fisheries Programme” thanks to a generous funding from the Government of Norway (Support to the implementation of the International Guidelines on the Management of Deep-Sea Fisheries in the High Seas project) for the purpose of assisting states, institutions, the fishing industry and RFMO/As in the implementation of FAO International Guidelines for the Management of Deep-sea Fisheries in the High Seas. It was developed in close collaboration with the FishFinder Programme of the Marine and Inland Fisheries Branch, Fisheries Department, Food and Agriculture Organization of the United Nations (FAO). The present guide covers the deep–sea Southeastern Atlantic Ocean and that portion of Southwestern Indian Ocean from 18°42’E to 30°00’E (FAO Fishing Area 47). It includes a selection of cartilaginous fish species of major, moderate and minor importance to fisheries as well as those of doubtful or potential use to fisheries. It also covers those little known species that may be of research, educational, and ecological importance. In this region, the deep–sea chondrichthyan fauna is currently represented by 50 shark, 20 batoid and 8 chimaera species. This guide includes full species accounts for 37 shark, 9 batoid and 4 chimaera species selected as being the more difficult to identify and/or commonly caught.
    [Show full text]
  • AC30 Doc. 20 A1
    AC30 Doc. 20 Annex 1 (in the original language / dans la langue d’origine / en el idioma original) Responses to Notification to the Parties No 2018/041 Table of Contents Australia 2 China 14 Colombia 16 European Union 18 Indonesia 22 Mexico 52 New Zealand 56 Peru 59 Philippines 65 United States of America 67 Uruguay 116 Florida International University 121 The Pew Charitable Trusts 123 Wildlife Conservation Society 125 Notification 2018/041 Request for new information on shark and ray conservation and management activities, including legislation Australia is pleased to provide the following response to Notification 2018/041 ‘Request for new information on shark and ray conservation and management activities, including legislation’. This document is an update of the information submitted in 2017 in response to Notification 2017/031. The Australian Government is committed to the sustainable use of fisheries resources and the conservation of marine ecosystems and biodiversity. In particular, we are committed to the conservation of shark species in Australian waters and on the high seas. The Australian Government manages some fisheries directly, others are managed by state and territory governments. The Australian Government also regulates the export of commercially harvested marine species. Australia cooperates internationally to protect sharks by implementing our Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) obligations, and by working with regional fisheries management organisations on the management of internationally straddling and highly migratory stocks. For more information on Australia’s fisheries management and international cooperation see the Australian Government Department of the Environment and Energy’s fisheries webpages at http://www.environment.gov.au/marine/fisheries.
    [Show full text]
  • Efficacy of 2 Common Bait Types in Reducing Bycatch of Coastal Sharks 191
    189 National Marine Fisheries Service Fishery Bulletin First U.S. Commissioner established in 1881 of Fisheries and founder NOAA of Fishery Bulletin Abstract—A recent study determined Efficacy of 2 common bait types in reducing that when simultaneously exposed to 2 different commonly used baits, certain bycatch of coastal sharks on bottom longline shark species demonstrate preferences for a specific bait on bottom longlines. gear in the absence of choice To further investigate the value of bait type to reduce shark bycatch, we con- William B. Driggers III (contact author)1 ducted single- bait- type bottom longline Kristin M. Hannan2 sets with standardized gear baited with either mackerel or squid. For 4 of Email address for contact author: [email protected] the 5 shark species captured, there was no significant difference in catch rates 1 with bait type. However, catch rates of Mississippi Laboratories Atlantic sharpnose sharks (Rhizopri- Southeast Fisheries Science Center onodon terraenovae) were significantly National Marine Fisheries Service, NOAA higher on mackerel- baited hooks. Our 3209 Frederic Street results indicate that the use of squid Pascagoula, Mississippi 39567-4112 as bait can reduce the catch of at least 2 Riverside Technology Inc. one shark species in the northern Gulf Mississippi Laboratories of Mexico while not reducing the catch Southeast Fisheries Science Center of a targeted species, in this case, the National Marine Fisheries Service, NOAA red snapper (Lutjanus campechanus). 3209 Frederic Street However, because some protected spe- Pascagoula, Mississippi 39567-4112 cies, most notably sea turtles, have been shown to have higher catch rates on squid- baited hooks, it is necessary to assess the effect of a specific bait across all taxa directly or indirectly affected by a particular gear type before adopt- Globally, shark populations are widely et al.
    [Show full text]
  • 2020/016 Dated 28 February 2020 in the Language and Format in Which They Were Received
    AC31 Doc. 25 Annex 2 Compilation of responses from Parties to Notification to the Parties No. 2020/016 dated 28 February 2020 in the language and format in which they were received Contents Cambodia ………………………………………………………………………………………………………………………………………....…1 Canada ………………………………………………………………………………………………………………………………..………..……..3 Colombia …………………………………………………………………………………………………………………………………….………..5 Costa Rica …………………………………………………………………………………………………………………………..………..………15 Croatia ……………………………………………………………………………………………………………………………..………..……….35 European Union ………………………………………………………………………………………………………..……………..………….36 Indonesia ………………………………………………………………………………………………………………………………………..…..43 Israel ……………………………………………………………………………………………………………………………………………..…….51 Italy ……………………………………………………………………………………………………………………………………………………..55 Japan ……………………………………………………………………………………………………………………………………………….….60 Mexico ………………………………………………………………………………………………………………………………………………..66 Monaco ……………………………………………………………………………………………………………………………………………….69 Netherlands …………………………………………………………………………………………………………………………………………73 New Zealand ………………………………………………………………………………………………………………………………………..77 Oceania Parties …………………………………………………………………………………………………………………………………….79 Peru ……………………………………………………………………………………………………………………………………………………..83 Senegal ………………………………………………………………………………………………………………………………………………..89 Thailand ……………………………………………………………………………………………………………………………………………….91 United States of America ……………………………………………………………………………………………………………………146 Cambodia AC31 Doc. 25 Annex 2 Canada Canadian Response to CITES Notification 2020/016
    [Show full text]
  • Conclusions GRS 1 3 5 6 8 9 10 12 16 18 20 21 31 35 36 38 40 42 45 GREENLAND SEA
    a a b c d e a) b) c) d) e) Lynghammar University of Tromsø, Norway, A., Christiansen University of Washington,, J. USAS., Gallucci Murmansk Marine, V. BiologicalF., Karamushko Institute, Russia California, O. V., AcademyMecklenburg of Sciences, USA, C. Natural W. History& Møller Museum ,of P. Denmark R. Contact: [email protected] introduction The sea ice cover decreases and human activity increases in Arctic waters. Fisheries (by-catch issues), shipping and petroleum exploita- tion (pollution issues) make it imperative to establish biological base- OCCURRENCE OF lines for the marine fishes inhabiting the Arctic Ocean and adjacent seas (AOAS). As a first step towards credible conservation actions for the Arctic marine fish faunae, we examine the species-richness of chondrich- thyan fishes (class Chondrichthyes) pertaining to 16 regions within the AOAS: chimaeras, sharks and skates. CHONDRICHTHYAN materials and methods • Voucher specimens from Natural History Collections IN THE ARCTIC OCEAN • Annotated checklists (see selected references) • The CAFF Database on Arctic marine fishes (Christiansen et al., in AND ADJACENT SEAS progress) FISHES Only presence and absence data are considered, as reliable abundance data lack for most species. Occurrences known only from floating or beach-cast carcasses, such as Pacific sleeper shark (no. 17) and Alaska skate (no. 29) in the Chukchi Sea, are not considered conclusive evidence of presence and are not included. CHIMAERIFORMES HEXANCHIFORMES RAJIFORMES Chimaeridae - ratfishes Chlamydoselachidae
    [Show full text]
  • European Shark Guide
    The European Shark Guide If you are heading for a European coastline this summer, the chances are you will be sharing the sea with some fascinating, but increasingly rare fish. That’s not meant to alarm you. The idea that sharks pose a serious danger to humans is a myth. The threat to sharks The fact is that this extraordinary group of fish is seriously threatened by human activities. European sharks are judged more at risk of extinction than those in most other assessed regions of the world. Europeans have a taste for shark meat that has driven several species to the brink. The shark’s most famous feature – the fin – is also at the heart of the threat to sharks. You can make a difference The EU banned shark finning in 2003, (please see page 9) but loopholes in the regulation seriously hamper enforcement. MEPs called on the European Commission to strengthen the shark finning ban nearly four years ago. In the coming months, the process for amending this critical regulation will finally begin in earnest. The Shark Alliance, a coalition of NGOs dedicated to restoring and conserving shark populations, has produced this fact-packed guide to give you some insight in to the amazing world of sharks, and help MEPs to conserve these remarkable but imperilled fish. All information was taken and adapted from Shark Alert by Sonja Fordham and other Shark Alliance publications. 1 Now Fas cin ating shark People evolve facts we think you ’ll like to know: Dinosaurs die Sharks, in some form, have roamed our seas 100 million years ago for more than 400 million years, which means their ancestors inhabited the earth for nearly 200 million years before dinosaurs.
    [Show full text]
  • Centrophorus Squamosus
    Published Date: 1 March 2019 Leafscale Gulper Shark, Centrophorus squamosus Report Card Undefined Stock assessment IUCN Red List IUCN Red List Refer to Global Australian Global Vulnerable Assessment Assessment Assessment Assessors White, W.T. & Graham, K.J. Sensitive to fishing pressure with some catches in Australia but Report Card Remarks uncertainty over stock status Summary The Leafscale Gulper Shark is a deepwater dogfish with a global distribution. Its flesh and livers are marketed in varying quantities over much of the species' range. Most targeted fishing pressure is in the northeast Atlantic where it is an important component of deepwater fisheries and declines of Source: CSIRO National Fish Collection. License: CC BY Attribution >80% have been reported. Catches of the species off Australia are relatively low and do not represent a significant component of deepwater catches. However, significant declines in closely related species in southeast Australia led to management measures to promote recovery of deepwater dogfish populations, such as catch limits and a ban on trawling below 700 m. The Leafscale Gulper Shark has intrinsically very low productivity, evident in significant population declines where it is heavily fished. Therefore, the species is assessed as globally Vulnerable (IUCN) and in Australia, Undefined Stock (SAFS) because the information is uncertain and insufficient to assess the Australian fish stock status. Distribution The Leafscale Gulper Shark occurs sporadically in the eastern Atlantic (Iceland to South Africa), in the Indian Ocean (South Africa and the Aldabra Islands), and the western Pacific (Japan, Taiwan, Philippines, Indonesia, New Zealand and Australia); a recent capture off the Galapagos Island extended the range to the eastern central Pacific (Acuna-Marrero et al.
    [Show full text]
  • Unique Osmoregulatory Morphology in Primitive Sharks
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by CCU Digital Commons Coastal Carolina University CCU Digital Commons Electronic Theses and Dissertations College of Graduate Studies and Research 7-31-2018 Unique Osmoregulatory Morphology in Primitive Sharks: An Intermediate State Between Holocephalan and Derived Shark Secretory Morphology Matthew rE ic Larsen Coastal Carolina University Follow this and additional works at: https://digitalcommons.coastal.edu/etd Part of the Biology Commons, Physiology Commons, and the Zoology Commons Recommended Citation Larsen, Matthew Eric, "Unique Osmoregulatory Morphology in Primitive Sharks: An Intermediate State Between Holocephalan and Derived Shark Secretory Morphology" (2018). Electronic Theses and Dissertations. 31. https://digitalcommons.coastal.edu/etd/31 This Thesis is brought to you for free and open access by the College of Graduate Studies and Research at CCU Digital Commons. It has been accepted for inclusion in Electronic Theses and Dissertations by an authorized administrator of CCU Digital Commons. For more information, please contact [email protected]. Unique Osmoregulatory Morphology in Primitive Sharks: An Intermediate State Between Holocephalan and Derived Shark Secretory Morphology By Matthew Eric Larsen Submitted in Partial Fulfillment of the Requirements for the Degree of Master of Science in Coastal and Marine Wetland Studies in the School of Coastal and Marine Systems Science Coastal Carolina University July 31, 2018 © 2018 by Matthew Eric Larsen (Coastal Carolina University) All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of Matthew Eric Larsen (Coastal Carolina University).
    [Show full text]
  • Chondrichthyes : Elasmobranchii) from the Miocene of Japan
    ｖｅｒ／化石研究会会誌 ＰＤＦ化／１５０２０３９２ 化石研究会誌４７巻２号／本文／０１ 欧文 ４１‐４７ 原著 2015.09. 化石研究会会誌 Journal of Fossil Research, Vol.４７（２）,４１-４７（２０１５） ［Original report］ A new genus of the Family Dalatiidae (Chondrichthyes : Elasmobranchii) from the Miocene of Japan SUZUKI, Hideshi* Abstract A new genus and species of a squaliform shark (Chondrichthyes: Elasmobranchii) Squaliomicrus sanadaensis gen. et sp. nov. is described. On the basis of one specimen, a fossil shark tooth discovered in the Middle Miocene Iseyama Formation (Northern Fossa Magna Region) in Ueda City, Nagano Prefecture, central Japan, Squaliomicrus differs markedly from related genera Dalatias Rafinesque 1810, Euprotomicrus Gill 1864, Isistius Gill 1864, Squaliolus Smith and Radcliffe 1912, Acrosqualiolus Adnet 2000, Eosqualiolus Adnet 2000, Squaliodalatias Adnet, Capetta and Reynders 2006 and Angoumeius Adnet, Cappetta and Reynders 2006 in the Family Dalatiidae and in the Squaliformes incertae familiae by the following lower tooth characters : tooth width larger than height, present upper axial foramen, absent basal notch, distal apron reaching the basal end, present median labial hollow with groove situated inside, and a distinct distal depression presents on the labial face. Judging from these differences in dental characters, this specimen is regarded as probably an undescribed species. This paper constitutes the first discovery and description of the new genus Squaliomicrus belonging to the Family Dalatiidae in the Miocene of Japan. Key words : Squaliomicrus sanadaensis, Dalatiidae, Middle Miocene,
    [Show full text]
  • And Their Functional, Ecological, and Evolutionary Implications
    DePaul University Via Sapientiae College of Science and Health Theses and Dissertations College of Science and Health Spring 6-14-2019 Body Forms in Sharks (Chondrichthyes: Elasmobranchii), and Their Functional, Ecological, and Evolutionary Implications Phillip C. Sternes DePaul University, [email protected] Follow this and additional works at: https://via.library.depaul.edu/csh_etd Part of the Biology Commons Recommended Citation Sternes, Phillip C., "Body Forms in Sharks (Chondrichthyes: Elasmobranchii), and Their Functional, Ecological, and Evolutionary Implications" (2019). College of Science and Health Theses and Dissertations. 327. https://via.library.depaul.edu/csh_etd/327 This Thesis is brought to you for free and open access by the College of Science and Health at Via Sapientiae. It has been accepted for inclusion in College of Science and Health Theses and Dissertations by an authorized administrator of Via Sapientiae. For more information, please contact [email protected]. Body Forms in Sharks (Chondrichthyes: Elasmobranchii), and Their Functional, Ecological, and Evolutionary Implications A Thesis Presented in Partial Fulfilment of the Requirements for the Degree of Master of Science June 2019 By Phillip C. Sternes Department of Biological Sciences College of Science and Health DePaul University Chicago, Illinois Table of Contents Table of Contents.............................................................................................................................ii List of Tables..................................................................................................................................iv
    [Show full text]