DOCSLIB.ORG

Micarelli P, Et Al. Observations About Not Invasive Method for Individual

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Micarelli P, Et Al. Observations About Not Invasive Method for Individual International Journal of Oceanography & Aquaculture MEDWIN PUBLISHERS ISSN: 2577-4050 Committed to create value for Researchers Observations about Not Invasive Method for Individual Identificatıon of Small Spotted Catshark (Scyliorhinus canicula, Linnaeus 1758) in Controlled Conditions Micarelli P1*, DI GRUMO D2, Reinero Fr1, Giglio Gianni3 and Sperone E3 1 Short Communication 2 Volume 4 Issue 2 Sharks Studies Center – Scientific Institute, Massa Marittima, Italy Received Date: Department of Zoology, Faculty of Natural and Oceanic Sciences, Universidad de Concepción, 3 Published Date: June 01, 2020 Chile June 19, 2020 Department of Biology, Ecology and Earth Sciences, University of Calabria, Italy *Corresponding author: DOI: 10.23880/ijoac-16000189 Micarelli Primo, Sharks Studies Centre, Loc.Valpiana, Massa Marittima, GR, Italy, Tel: 00393896732796; Email: [email protected], [email protected] Short Communication Much of the knowledge we have on the elasmobranchs and detrimental effects to individual fitness and natural (wasScyliorhinus built by researchcanicula carried out within the aquaria in behavior [16]. Lethal effects on fragile young individuals controlled conditions [1-7]. The small spotted catshark are possible [15]. An effective and no invasive identification , Linnaeus 1758) is a common technique becomes of paramount importance in many host of many aquaria through Europe. It is a widespread behavioral and nutritional experiments in aquarium as in elasmobranch in the North East Atlantic Ocean: from Norway much individual treatments and therefore discrimination to Senegal, including the Mediterranean Sea [8]. It is a species of each specimen is crucial. As far as the authors are aware, of significant commercial importance in countries like the the ethological investigations are scarce, and the only one on UK where it is abundant and used for fish meal [9]. In other social behavior was the Jacoby and colleagues’ work (2012) areas, this benthic shark is a catch accessory, and used as a using invasive methods. freshS. product canicula or in salt and to produce oil. ScyliorhinusThe Shark canicula Studies Center – Scientific Institute in Massa is a hardy and prolific species with least Marittima (Tuscany, Italy) hosts S.several canicula adult specimens of concern for its conservation [10,11]. It has a successful . The sharks spawn eggs throughout the reproduction, spawning even in captivity. These features year. We used young newborns of as model species make it an ideal and useful model for research in controlled to test a no invasive technique that could be effective in the conditions along with their capacity to recover after an distinct experiments to identify the shark specimens. The emersion event [12]. The stress resistance is a significant classic naturalistic drawing [17] and the digital photography feature for many scientific studies. For instance, the approach [18] were combined. nutritional ones where weighting and length measurements out of the water are frequent. We chose four specimens of which three have survived S. canicula until the end of the experiment. TheS. observationscanicula were While most people have no trouble in recognizing a carried out for three months. The search of marks was specimen of , the individual animals are much more directed to the typical dorsal spots of . They are difficult to distinguish [13]. The specimens show variation in extensively used in literature as permanent marks on other size and cryptic colors of the spots on the skin (black, white species too [19-21]. and brownish) [14]. Unless adopting invasive techniques such as the fin and subcutaneous tags [15], most of the For the identification the technique of naturalistic animals remain unidentified. Tagging studies have many drawing was chosen, as it is an efficient method to allow limitations and practical issues, linked to their short lifetime the viewer to grasp the details and memorized them. The (Scyliorhinus canicula Observations about Not Invasive Method for Individual Identificatıon of Small Spotted Catshark Int J Oceanogr Aquac , Linnaeus 1758) in Controlled Conditions 2 International Journal of Oceanography & Aquaculture design has repeatedly played a significant role in naturalistic experimental activities. The specimens were named Alfa, Beta observations [17]. The photographic camera was combined and Delta. The point disposition that helps us to discriminate to catch the mark shapes better and to use the pictures as a and carry out observations on the sharks are highlighted in reference in case of uncertainty in the discrimination. the drawing (Figure 1). These spots were present since birth and did not disappear during the experimental period, rather After careful observation of various physical features, they increase in number and size with the age. Long-term black points were identified in the dorsal part at the end follow-up of juvenile individuals until adult stage is needs to of the head and behind the gills. These marks allowed us be tested for permanent character of the marks. to distinguish each animal in the nursery tank during the Figure 1 S. canicula A) Alfa B) Beta C) Delta : Pictures (above) and draws (bottom) of black dorsal identification spots of three : specimen “ ”; “ ”; “ ”. This non-invasive and not stressful method allowed 5. Jacobs DMP, Darren P Croft, David W Sims (2011) experiments with closely grouped individuals. This study Social behaviour in sharks and rays: analysis, patterns offers many applications in social behavioral and nutritional and implications for conservation. Fish and Fisheries, studies (e.g. with the less studied juveniles). A computer- Blackwell Publishing Ltd 13(4): 399-417. based graphic analysis and automated recognition programs Scyliorhinus could further improve the method. This tendency must always 6. stellarisMicarelli P, Sperone E, Serena F, Compagno LJV (2016) be joint with procedures that improve the research ability of Evidence of Sperm Storage in Nursehound ( individual discrimination (the naturalistic drawing). In fact, , Linnaeus 1758): Juveniles Husbandry and in these works the only use of photographic identification is Tagging program. International Journal of Oceanography pointless. The researchers need to distinguish the mobile or 2016: 8729835. elusive individuals during the observation time, and not in 7. Micarelli P, De lucia L, Canetti D, Sperone E (2017) postproduction. Scyliorhinus stellaris References Preliminary Observations on the AbilityScyliorhinus to Adapt canicula Salinity Changes in Nursehound (Linnaeus, Scyliorhinus 1758) and Small Spotted Catsharks canicula 1. Mellinger J (1994) L’oeuf de roussette ( (Linnaeus, 1758). International Journal of Oceanography ) incubè au laboratoire: un materiel de recherche & Aquaculture 1(1): 000104. pour l’embriologiste, l’ethologiste. le phisiologisteIch tyo 8. Compagno LJV (1984) FAO Species Catalogue. Vol. physiologica Acta 17: 9-27. 4. Sharks of the world. An annotated and illustrated 2. Domi N, Poncin Pascal, Voss Jacques (2000) A new catalogue of shark species known to date. Part 2 – Scyliorhinus canicula Carcharhiniformes, FAO Fish Synop 125(4/2): 251-655. observed pre-copulatory behaviour of the lesser-spotted rd dogfish, , in captivity. In: Séret B, 9. Davidson A (2004) North Atlantic Seafood: A Sire JY, (Eds.), Société française d’Ichtyologie, Paris, pp: Comprehensive Guide with Recipes, 3 (Edn.), Ten Speed 67-91. Press, pp: 168. 3. ScyliorhinusCapapé C, Vergne stellaris Y, Vianet R, Guélorget O, Quignard 10. Fowler SL (2005) Sharks, Rays and Chimaeras: The JP (2006) Biological observations on the nursehound, Status of the Chondrichthyan Fishes. IUCN/SSC Shark (Linnaeus, 1758) (Chondrichthyes: Specialist Group Gland, Switzerland and Cambridge, Scyliorhinidae) in captivity. Acta Adriatica 47(1): 29-36. IUCN-The World Conservation Union, UK, pp: 19-68. Scyliorhinus canicula 4. Guttridge (2009) The role of learning in shark behaviour. 11. Ellis J, Mancusi C, Serena F, Haka F, Guallart J, et al. (2009) Fish And Fisheries, Blackwell Publishing Ltd. The IUCN Red List of Threatened Species 2009: e.T161399A5415204.Copyright© Micarelli P, et al. Small Spotted Catshark (Scyliorhinus canicula, Linnaeus 1758) in Controlled Conditions. IntMicarelli J Oceanogr P, et al.Aquac Observations 2020, 4(2): about 000189. Not Invasive Method for Individual Identificatıon of 3 International Journal of Oceanography & Aquaculture 12. Murray C, Connors R, O’Connor I, Dowling V (2015) 17. Charmantier I (2011) Carl Linnaeus and the visual (TheScyliorhinus physiological canicula response and recovery of a common representation of nature. Hist Stud Nat Sci 41(4): 365- elasmobranch bycatch species: the lesser spotted dogfish 404. ) subject to a controlled exposure event. In Biology and Environment: Proceedings of the 18. Marshall AD, Pierce SJ (2012) The use and abuse of Royal Irish Academy 115(3): 143-156. photographic identification in sharks and rays. Journal of fish biology 80(5): 1361-1379. 13. Scott WM (2001) Aquarium Sharks & Rays: An Essential Guide to Their Selection, Keeping, and Natural History. 19. CarchariasBansemer CS,taurus Bennett MB (2008) Multi-year validation Hardcover: Microcosm/T.F.H. of photographic identification of grey nurse sharks, , and applications for non-invasive 14. Sumpter JP, Denning-KendallScyliorhinus PA, Lowrycanicula PJ (1984) The conservation research. Marine and Freshwater Research involvement of melanotrophins in physiological colour 59(4): 322-331. change
Load more

Recommended publications
  • Bibliography Database of Living/Fossil Sharks, Rays and Chimaeras (Chondrichthyes: Elasmobranchii, Holocephali) Papers of the Year 2016
    www.shark-references.com Version 13.01.2017 Bibliography database of living/fossil sharks, rays and chimaeras (Chondrichthyes: Elasmobranchii, Holocephali) Papers of the year 2016 published by Jürgen Pollerspöck, Benediktinerring 34, 94569 Stephansposching, Germany and Nicolas Straube, Munich, Germany ISSN: 2195-6499 copyright by the authors 1 please inform us about missing papers: [email protected] www.shark-references.com Version 13.01.2017 Abstract: This paper contains a collection of 803 citations (no conference abstracts) on topics related to extant and extinct Chondrichthyes (sharks, rays, and chimaeras) as well as a list of Chondrichthyan species and hosted parasites newly described in 2016. The list is the result of regular queries in numerous journals, books and online publications. It provides a complete list of publication citations as well as a database report containing rearranged subsets of the list sorted by the keyword statistics, extant and extinct genera and species descriptions from the years 2000 to 2016, list of descriptions of extinct and extant species from 2016, parasitology, reproduction, distribution, diet, conservation, and taxonomy. The paper is intended to be consulted for information. In addition, we provide information on the geographic and depth distribution of newly described species, i.e. the type specimens from the year 1990- 2016 in a hot spot analysis. Please note that the content of this paper has been compiled to the best of our abilities based on current knowledge and practice, however,
    [Show full text]
  • 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]
  • Sharks and Rays Back in the North Sea!
    SHARKS AND RAYS BACK IN THE NORTH SEA! © Peter Verhoog Juvenile thornback rays ABOUT SHARKS AND RAYS Important for the marine ecosystem Long before we humans walked this earth, beautiful sharks and rays were swimming in the world’s oceans. These apex predators have been at the top of the food chain for 450 million years, where they fulfil a vital role in the ecosystem of the oceans. They ‘maintain’ coral reefs, they ensure the ecological balance between species and they contribute to healthy populations of other animals by eating the weaker individuals. Largescale overfishing of sharks and rays affects the entire food chain and thus the health of the oceans. Low reproductive capacity Sharks and rays are characterized by a low reproductive capacity; many species are only sexually mature after more than 10 years. Most shark species develop their eggs inside the body of the female. Baby sharks are born fully developed. Most sharks have 1 to 20 pups per year. The reproductive biology of sharks is therefore more akin to that of marine mammals than fish. The Dutch North Sea is the habitat of several egg-laying shark species and rays: both the small-spotted catshark and the greater spotted dogfish or nursehound lay 18 to 20 eggs per year. The eggs take 7 to 10 months to hatch. The empty cases often wash up on beaches. Most Dutch bottom-dwelling rays lay eggs, from 20 to 140 eggs per year. Due to their low reproduction cycles, sharks and rays are vulnerable for overfishing, as the recovery of populations is very slow.
    [Show full text]
  • Morphological and Mitochondrial DNA Divergence Validates Blackmouth, Galeus Melastomus, and Atlantic Sawtail Catsharks, Galeus Atlanticus,Asseparatespecies
    Journal of Fish Biology (2007) 70 (Supplement C), 346–358 doi:10.1111/j.1095-8649.2007.01455.x, available online at http://www.blackwell-synergy.com Morphological and mitochondrial DNA divergence validates blackmouth, Galeus melastomus, and Atlantic sawtail catsharks, Galeus atlanticus,asseparatespecies R. CASTILHO*†, M. FREITAS*, G. SILVA*, J. FERNANDEZ-CARVALHO‡ AND R. COELHO‡ *Biodiversity and Conservation Group, CCMAR, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal and ‡Coastal Fisheries Research Group, CCMAR, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal (Received 30 August 2006, Accepted 17 January 2007) A total of 60 morphometric traits and nucleotide sequences of the entire mtDNA NADH dehydrogenase subunit 2 (ND2) gene [1047 base pair (bp)] in 23 individuals of blackmouth, Galeus melastomus, and 13 individuals of sawtail catsharks, Galeus atlanticus, caught in Southern Portugal, were examined to test the validity of these two taxa. These sharks closely resemble each other, have overlapping geographical ranges and are difficult to identify by morphological characters. Non-metric multidimensional scaling of morphometric variables indicates a clear separation between the two species, with 10 characters each contributing 2Á12–2Á45% of the total variability between species. Maximum likelihood, parsimony and neighbour-joining trees revealed two major mtDNA haplotype clades, corresponding to the two species, with an average corrected sequence divergence between them of 3Á39 Æ 0Á56%. Within species divergences between haplotypes averaged 0Á27 Æ 0Á18% in G. melastomus and 0Á12 Æ 0Á08% in G. atlanticus. A total of 35 diagnostic nucleotide site differences and four restriction fragment length polymorphism recognition sites in the ND2 gene can be used to distinguish the two species.
    [Show full text]
  • Biological Observations on the Nursehound, Scyliorhinus Stellaris (Linnaeus, 1758) (Chondrichthyes: Scyliorhinidae) in Captivity
    ISSN: 0001-5113 ACTA ADRIAT., UDC: 597.33 AADRAY 47 (1): 29 - 36, 2006 Original scientific paper Biological observations on the nursehound, Scyliorhinus stellaris (Linnaeus, 1758) (Chondrichthyes: Scyliorhinidae) in captivity Christian CAPAPÉ1*, Yvan VERGNE1, Régis VIANET2, Olivier GUÉLORGET1, and Jean-Pierre QUIGNARD1 1 Laboratoire d’Ichtyologie, Case 104, Université Montpellier II, Sciences et Techniques du Languedoc, 34095 Montpellier Cedex 05, France 2 Parc Naturel Régional de Camargue, Mas du Pont de Rousty, 13200 Arles, France * Corresponding author, e-mail: [email protected] Observations conducted over two years on nursehounds, Scyliorhinus stellaris, in captivity provided data on the number of eggs laid per year, embryonic development, size at hatching, length growth following hatching, and estimated fecundity. Key words: Scyliorhinidae, Scyliorhinus stellaris, eggs, hatching, length growth, captivity INTRODUCTION marine areas it inhabits (QUÉRO, 1984). Informa- tion was provided about the spawning period The small-spotted catshark, Scyliorhinus for specimens from Plymouth in the British canicula (Linnaeus, 1758), was the focus of Isles (GARSTAND, 1893-1895; FORD, 1921), the several articles concerning free-swimming Adriatic Sea (SYRSKI, 1876; GRAEFFE, 1888), (FORD, 1921; LELOUP & OLIVEREAU, 1951; and off Naples in southern Italy (LO BIANCO, MELLINGER, 1962ab, 1964; CAPAPÉ, 1977; CRAIK, 1909; MASCHLANKA, 1955). In the Adriatic Sea, 1978; CAPAPÉ et al., 1991; ELLIS & SHACKLEY, JARDAS (1979) noted that S. stellaris is found in 1997) and captive specimens (MELLINGER, 1989, shallow coastal waters at depths up to 60 m, 1994; HOUZIAUX & VOSS, 1997; DOMI et al., 2000). while GRUBIŠIĆ (1982) reported its occurrence In contrast, its close relative, the nurse- throughout the area at depths of 40-100 m, and hound, Scyliorhinus stellaris (Linnaeus, 1758), rarely over 200 m.
    [Show full text]
  • Biofluorescence in Catsharks (Scyliorhinidae): Fundamental Description and Relevance for Elasmobranch Visual Ecology
    City University of New York (CUNY) CUNY Academic Works Publications and Research Baruch College 2016 Biofluorescence in Catsharks (Scyliorhinidae): Fundamental Description and Relevance for Elasmobranch Visual Ecology David F. Gruber CUNY Bernard M Baruch College Ellis R. Loew Cornell University Dimitri D. Deheyn University of California - San Diego Derya Akkaynak University of Haifa Jean P. Gaffney CUNY Bernard M Baruch College See next page for additional authors How does access to this work benefit ou?y Let us know! More information about this work at: https://academicworks.cuny.edu/bb_pubs/993 Discover additional works at: https://academicworks.cuny.edu This work is made publicly available by the City University of New York (CUNY). Contact: [email protected] Authors David F. Gruber, Ellis R. Loew, Dimitri D. Deheyn, Derya Akkaynak, Jean P. Gaffney, W. Leo Smith, Matthew P. Davis, Jennifer H. Stern, Vincent A. Pieribone, and John S. Sparks This article is available at CUNY Academic Works: https://academicworks.cuny.edu/bb_pubs/993 www.nature.com/scientificreports OPEN Biofluorescence in Catsharks (Scyliorhinidae): Fundamental Description and Relevance for Received: 22 January 2016 Accepted: 05 April 2016 Elasmobranch Visual Ecology Published: 25 April 2016 David F. Gruber1,2,3, Ellis R. Loew4, Dimitri D. Deheyn5, Derya Akkaynak6,7, Jean P. Gaffney1, W. Leo Smith8, Matthew P. Davis9, Jennifer H. Stern8, Vincent A. Pieribone10 & John S. Sparks3,11 Biofluorescence has recently been found to be widespread in marine fishes, including sharks. Catsharks, such as the Swell Shark (Cephaloscyllium ventriosum) from the eastern Pacific and the Chain Catshark (Scyliorhinus retifer) from the western Atlantic, are known to exhibit bright green fluorescence.
    [Show full text]
  • Evidence of Sperm Storage in Nursehound (Scyliorhinus Stellaris, Linnaeus 1758): Juveniles Husbandry and Tagging Program
    Hindawi Publishing Corporation International Journal of Oceanography Volume 2016, Article ID 8729835, 5 pages http://dx.doi.org/10.1155/2016/8729835 Research Article Evidence of Sperm Storage in Nursehound (Scyliorhinus stellaris, Linnaeus 1758): Juveniles Husbandry and Tagging Program Primo Micarelli,1 Emilio Sperone,2 Fabrizio Serena,3 and Leonard J. V. Compagno4 1 Aquarium Mondo Marino, Centro Studi Squali, Massa Marittima, Italy 2DipartimentodiBiologia,EcologiaeScienzedellaTerra,Universita` della Calabria, Rende, Italy 3Responsabile UnitaOperativaRisorsaItticaeBiodiversit` a` Marina, ARPAT Settore Mare, Via Marradi 114, 57100 Livorno, Italy 4Shark Research Center, 8 Lower Glen Road, Glencairn, South Africa Correspondence should be addressed to Primo Micarelli; [email protected] Received 29 March 2016; Revised 14 June 2016; Accepted 15 June 2016 Academic Editor: Heinrich Huhnerfuss¨ Copyright © 2016 Primo Micarelli et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Nursehound, Scyliorhinus stellaris (Linnaeus 1758), is a shark of the Scyliorhinidae family, close to the Scyliorhinus canicula (Lin- naeus 1758), frequently hosted in public aquaria. Information on biology and ecology is deficiently available regarding this species of sharks. In the Mediterranean basin, they are occasional rare and vulnerable species (Serena, 2005). In 2003 a female specimen of Scyliorhinus stellaris, 90 cm long, fished in the Tyrrhenian Sea was transferred to Tuscany Argentario Mediterranean Aquarium and placed in a 20.000 L tank. The female laid 42 eggs and juveniles were born on 2004 and 2005. They were transferred to the aquarium laboratory in order to get standard protocol for correct juveniles husbandry.
    [Show full text]
  • First Report of the Whitesaddled Catshark Scyliorhinus Hesperius
    Hacohen-Domené et al. Marine Biodiversity Records (2016) 9:101 DOI 10.1186/s41200-016-0103-9 MARINE RECORD Open Access First report of the whitesaddled catshark Scyliorhinus hesperius (Springer 1966) in Guatemala’s Caribbean Sea Ana Hacohen-Domené1* , Francisco Polanco-Vásquez1 and Rachel T. Graham2 Abstract Background: The present study represents the first record of Scyliorhinus hesperius in Guatemala’s Caribbean Sea. Methods: Five male whitesaddled catsharks, S. hesperius, were captured in 200 m deep waters of Guatemala’s Caribbean coast. Results and Conclusion: All specimens were male with total lengths ranging from 420 mm to 510 mm. These fish represent the first record of mature male S. hesperius, the first record for this species in Guatemalan territorial waters,andarangeextensionintheWesternCentralAtlantic. Keywords: Deep-water chondrichthyans, First record, Range extension, Caribbean, Background (TL). Additionally Springer (1966) examined 12 specimens, Scyliorhinidae (catsharks) constitute the largest shark sex not specified, ranging in total length from 177–460 mm. family with at least 160 species distributed across 17 All specimens were captured between 274 m and 530 m genera (Ebert et al. 1996). These species are broadly depth in the Western Caribbean near Jamaica and distributed throughout temperate and tropical waters, Honduras and southward towards Panama and Columbia inhabiting the bottom of shallow and deep waters over (Springer 1966). Later, Ross and Quattrini (2009) reported 100 m (Nakaya 1975). Catsharks are small, demersal sightings of three individual sharks S. hesperius resting on species, and relatively poor swimmers (Compagno et al. thick coral rubble between 580–604 m depth, off of 2005). Jacksonville, Florida, while conducting deep water dives The genus Scyliorhinus Blainville 1816, is comprised on deep reefs along the southeastern US continental of 16 species distributed in cold, subtemperate to shelf slope.
    [Show full text]
  • Database of Bibliography of Living/Fossil
    www.shark-references.com Version 16.01.2018 Bibliography database of living/fossil sharks, rays and chimaeras (Chondrichthyes: Elasmobranchii, Holocephali) Papers of the year 2017 published by Jürgen Pollerspöck, Benediktinerring 34, 94569 Stephansposching, Germany and Nicolas Straube, Munich, Germany ISSN: 2195-6499 DOI: 10.13140/RG.2.2.32409.72801 copyright by the authors 1 please inform us about missing papers: [email protected] www.shark-references.com Version 16.01.2018 Abstract: This paper contains a collection of 817 citations (no conference abstracts) on topics related to extant and extinct Chondrichthyes (sharks, rays, and chimaeras) as well as a list of Chondrichthyan species and hosted parasites newly described in 2017. The list is the result of regular queries in numerous journals, books and online publications. It provides a complete list of publication citations as well as a database report containing rearranged subsets of the list sorted by the keyword statistics, extant and extinct genera and species descriptions from the years 2000 to 2017, list of descriptions of extinct and extant species from 2017, parasitology, reproduction, distribution, diet, conservation, and taxonomy. The paper is intended to be consulted for information. In addition, we provide data information on the geographic and depth distribution of newly described species, i.e. the type specimens from the years 1990 to 2017 in a hot spot analysis. New in this year's POTY is the subheader "biodiversity" comprising a complete list of all valid chimaeriform, selachian and batoid species, as well as a list of the top 20 most researched chondrichthyan species. Please note that the content of this paper has been compiled to the best of our abilities based on current knowledge and practice, however, possible errors cannot entirely be excluded.
    [Show full text]
  • Reproduction and Embryonic Development of the Sand Tiger Shark, Odontaspis Taurus (Rafinesque)
    FAU Institutional Repository http://purl.fcla.edu/fau/fauir This paper was submitted by the faculty of FAU’s Harbor Branch Oceanographic Institute. Notice: ©1983 NOAA’s National Marine Fisheries Service. This manuscript is available at http://fisherybulletin.nmfs.noaa.gov/index.html and may be cited as: Gilmore, R. G., Dodrill, J. W., & Linley, P. A. (1983). Reproduction and embryonic development of the sand tiger shark, Odontaspis taurus (Rafinesque). Fishery Bulletin, 8(2), 201‐225. REPRODUCTION AND EMBRYONIC DEVELOPMENT OF THE SAND TIGER SHARK, ODONTASPIS TAURUS (RAFINESQUE)1 R. GRANT GILMORE" JON W. DODRILL', AND PATRICIA A. LINLEY' ABSTRACT The capture of one ripe male, 191.5 cm TL, and 26 pregnant female, 236.6-274.3 cm TL, sand tiger sharks, Odontaspis taurus, from the east-central coast of Florida from 1946 to 1980 has permitted examination of early reproductive activity and embryonic development in this species. Variations in ovulation rates and oviducal gland activity produce six distinct egg capsule types at varying times during gestation. Some egg capsules produced during early gestation contain only ovalbumin and/or mucus while others contain several fertilized ova. As gestation proceeds, more capsules contain unfertilized ova and ovulation rates increase. These latter capsules serve principally as food for the surviving embryo. Sixty-two embryos, 13-1,060 mm TL, provided information on intrauterine development which allowed classification ofseven developmental periods basedon gestation time, embryonic anatomy, posture, activity, and source of nutrition. Initially, embryos 13-18.5 mm TL obtain nutrition from internal coelomic yolk sup­ plies during a period of early tissue differentiation.
    [Show full text]
  • Discovery of a New Mode of Oviparous Reproduction in Sharks and Its Evolutionary Implications Kazuhiro Nakaya1, William T
    www.nature.com/scientificreports OPEN Discovery of a new mode of oviparous reproduction in sharks and its evolutionary implications Kazuhiro Nakaya1, William T. White2 & Hsuan‑Ching Ho3,4* Two modes of oviparity are known in cartilaginous fshes, (1) single oviparity where one egg case is retained in an oviduct for a short period and then deposited, quickly followed by another egg case, and (2) multiple oviparity where multiple egg cases are retained in an oviduct for a substantial period and deposited later when the embryo has developed to a large size in each case. Sarawak swellshark Cephaloscyllium sarawakensis of the family Scyliorhinidae from the South China Sea performs a new mode of oviparity, which is named “sustained single oviparity”, characterized by a lengthy retention of a single egg case in an oviduct until the embryo attains a sizable length. The resulting fecundity of the Sarawak swellshark within a season is quite low, but this disadvantage is balanced by smaller body, larger neonates and quicker maturation. The Sarawak swellshark is further uniquely characterized by having glassy transparent egg cases, and this is correlated with a vivid polka‑dot pattern of the embryos. Five modes of lecithotrophic (yolk-dependent) reproduction, i.e. short single oviparity, sustained single oviparity, multiple oviparity, yolk‑sac viviparity of single pregnancy and yolk‑sac viviparity of multiple pregnancy were discussed from an evolutionary point of view. Te reproductive strategies of the Chondrichthyes (cartilaginous fshes) are far more diverse than those of the other animal groups. Reproduction in chondrichthyan fshes is divided into two main modes, oviparity (egg laying) and viviparity (live bearing).
    [Show full text]