DOCSLIB.ORG

United Nations Environnement Programme

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
United Nations Environnement Programme EP United Nations Environnement Programme UNEP(DEPI)/MED WG.331/Inf.12 30 April 2009 ENGLISH ORIGINAL: ENGLISH MEDITERRANEAN ACTION PLAN Ninth Meeting of Focal Points for SPAs Floriana, Malta, 3-6 June 2009 Report on the Cartilaginous Fishes in Slovenia, Croatia, Bosnia & Herzegovina and Montenegro: Proposal of a Sub-Regional Working Programme to Support the Implementation of the Regional Action Plan UNEP RAC/SPA - Tunis, 2009 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. The opinions expressed in this document do not necessarily represent the views of UNEP. © 2009 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] The original version (English) of this document has been prepared for the Regional Activity Centre for Specially Protected Areas (RAC/SPA) by: Fabrizio SERENA Monica BARONE With the participation of: Alen SOLDO. Centre of Marine Studies University of Split Livanjska 5/III, 21000 Split, Croatia Nedo VRGOČ Institute of Oceanography and Fisheries Setaliste Ivana Mestrovica 63 p.o. box 500 - 21000 Split, Croatia Aleksandar JOKSIMOVIC Institute of Marine Biology, PO Box 69 - 85 330 Kotor, Montenegro Bojan MARČETA Fisheries Research Institute of Slovenia Ţupančičeva 9 SI-1000 Ljubljana, Slovenia UNEP(DEPI)/MED WG.331/Inf.12 Page 1 TABLE OF CONTENTS LIST OF FIGURES AND TABLES ........................................................................................ 3 LIST OF ABBREVIATIONS ................................................................................................ 4 FOREWORD .................................................................................................................. 5 1 AREA OF INTEREST: THE ADRIATIC SEA ........................................................... 7 1.1 Oceanographic properties .......................................................................................... 7 1.2 Marine fisheries ......................................................................................................... 8 1.3 Cartilaginous fishes in the Eastern Adriatic Sea ...................................................... 10 2 TAXONOMIC LIST OF THE CHONDRICHTHYAN FISHES OF EASTERN ADRIATIC SEA ...................................................................................................... 13 2.1 Sharks ...................................................................................................................... 14 2.2 Batoids ..................................................................................................................... 17 3 COUNTRY FISHERY INFORMATION WITH REFERENCE TO CHONDRICHTHYAN FISHES ............................................................................... 20 3.1 Slovenia (by Bojan Marčeta) ................................................................................... 20 3.1.1 Coastal characteristics ...................................................................................................... 20 3.1.2 Fishing fleet ...................................................................................................................... 22 3.1.3 Trawl surveys ................................................................................................................... 23 3.1.4 List of Chondrichthyan fishes of the Slovenian Adriatic Sea .......................................... 24 3.1.5 Recommendations for the enhancement of the Action Plan ............................................ 25 3.1.6 References on cartilaginous fishes ................................................................................... 25 3.2 Croatia (by Alen Soldo and Nedo Vrgoč) ............................................................... 26 3.2.1 Coastal characteristics ...................................................................................................... 26 3.2.2 Marine fisheries with some notes on cartilaginous fishes ................................................ 26 3.2.3 Protected areas and fishing regulation in Croatia ............................................................. 27 3.2.4 Fishing fleet ...................................................................................................................... 28 3.2.5 Trawl surveys ................................................................................................................... 29 3.2.6 List of Chondrichthyan fishes of the Croatian Adriatic Sea ............................................ 30 3.2.7 References on cartilaginous fishes ................................................................................... 31 3.3 Bosnia and Herzegovina (by Alen Soldo) ............................................................... 33 3.4 Montenegro (by Aleksandar Joksimovic) ................................................................ 33 3.4.1 Coastal characteristics ...................................................................................................... 33 3.4.2 Marine fisheries with some notes on cartilaginous fishes ................................................ 33 3.4.3 Fishing fleet ...................................................................................................................... 34 3.4.4 Trawl surveys and national monitoring programmes ....................................................... 35 3.4.5 References on cartilaginous fishes ................................................................................... 36 4 CONSERVATION .................................................................................................. 37 5 RECCOMENDATIONS AND RESEARCH OBJECTIVES ..................................... 38 5.1 Recommendations .................................................................................................... 38 5.2 Research objectives ................................................................................................. 39 UNEP(DEPI)/MED WG.331/Inf.12 Page 2 6 OBJECTIVE I ......................................................................................................... 40 6.1 Biological parameters .............................................................................................. 40 6.1.1 Reproduction .................................................................................................................... 40 6.1.2 Diet ................................................................................................................................... 44 6.1.3 Growth ............................................................................................................................. 46 7 OBJECTIVE II ........................................................................................................ 47 7.1 Distribution and abundance of cartilaginous fishes ................................................. 47 8 OBJECTIVE III ....................................................................................................... 47 8.1 Enhancement of identification ................................................................................. 47 9 OBJECTIVE IV ...................................................................................................... 48 9.1 Public awareness ...................................................................................................... 48 10 TIMETABLE ................................................................................................ 48 11 REFERENCES ............................................................................................ 49 11.1 References in the text ............................................................................................... 49 11.2 Systematics (identification) ..................................................................................... 50 11.3 Biology .................................................................................................................... 50 APPENDICES .......................................................................................................... 53 APPENDIX A : Report of the Meeting to Prepare the Proposal for a Research Programme on Chondrichthyan Fishes of Slovenia, Croatia, Bosnia & Herzegovina and Montenegro . 54 APPENDIX B : MEDLEM data collection field sheet ........................................................ 59 MEDLEM data collection field sheet ................................................................................... 60 UNEP(DEPI)/MED WG.331/Inf.12 Page 3 LIST OF FIGURES AND TABLES Figure 1. Countries involved in the project ....................................................................................... 7 Figure 2. Bathymetric map of the Adriatic Sea (Hrvatski Hidrografski Institut, Peljar, 1999) .... 7 Figure 3. Surface currents in the Adriatic Sea (Zore-Armanda, 1967) ......................................... 8 Figure 4. Capture fisheries production in “Adriatic” division (1970-2002) (excluding bivalve molluscs and aquaculture). ........................................................................................................ 9 Figure 5. Capture production of cartilaginous fishes (GFCM 1970-2005) ................................
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]
  • Hasan ALKUSAIRY 1, Malek ALI 1, Adib SAAD 1, Christian REYNAUD 2, and Christian CAPAPÉ 3*
    ACTA ICHTHYOLOGICA ET PISCATORIA (2014) 44 (3): 229–240 DOI: 10.3750/AIP2014.44.3.07 MATURITY, REPRODUCTIVE CYCLE, AND FECUNDITY OF SPINY BUTTERFLY RAY, GYMNURA ALTAVELA (ELASMOBRANCHII: RAJIFORMES: GYMNURIDAE), FROM THE COAST OF SYRIA (EASTERN MEDITERRANEAN) Hasan ALKUSAIRY 1, Malek ALI 1, Adib SAAD 1, Christian REYNAUD 2, and Christian CAPAPÉ 3* 1 Marine Sciences Laboratory, Faculty of Agriculture, Tishreen University, Lattakia, Syria 2 Centre d’Ecologie Fonctionnelle et Evolutive – CNRS UMR 5175, 1919 route de Mende, 34293, Montpellier, France 3 Laboratoire d’Ichtyologie, Université Montpellier II, Sciences et Techniques du Languedoc, 34095 Montpellier cedex5, France Alkusairy H., Ali M., Saad A., Reynaud C., Capapé C. 2014. Maturity, reproductive cycle, and fecundity of spiny butterfly ray, Gymnura altavela (Elasmobranchii: Rajiformes: Gymnuridae), from the coast of Syria (eastern Mediterranean). Acta Ichthyol. Piscat. 44 (3): 229–240. Background. Captures of Gymnura altavela from the Syrianmarine waters allowed to improve knowledge of size at first sexuality of males and females, reproductive period and fecundity. Materials and methods. In all, 114 specimens were measured for disk width (DW) and weighed. Sexual matu- rity was determined in males from the length of claspers and aspects of the reproductive tract, and in females from the condition of ovaries and the morphology of the reproductive tract. Hepatosomatic index (HSI), gonado- somatic index (GSI) were calculated in males and females, and their variations related to size were considered in all categories of specimens. To investigate the embryonic development and the role of the mother during gesta- tion, a chemical balance of development (CBD) was determined, based on the mean dry mass of fertilized eggs and fully developed oocytes.
    [Show full text]
  • Rapid Assessment of Sustainability for Ecological Risk of Shark and Other
    Rapid assessment of sustainability for ecological risk of shark and other chondrichthyan bycatch species taken in the Southern and Eastern Scalefish and Shark Fishery Terence I. Walker, John D. Stevens, J. Matias Braccini, Ross K. Daley, Charlie Huveneers, Sarah B. Irvine, Justin D. Bell, Javier Tovar‐Ávila, Fabian I. Trinnie, David T. Phillips, Michelle A. Treloar, Cynthia A. Awruck, Anne S. Gason, John Salini, and William C. Hamlett Project No. 2002/033 Rapid assessment of sustainability for ecological risk of shark and other chondrichthyan bycatch species taken in the Southern and Eastern Scalefish and Shark Fishery Terence I. Walker, John D. Stevens, J. Matias Braccini, Ross K. Daley, Charlie Huveneers, Sarah B. Irvine, Justin D. Bell, Javier Tovar‐ Ávila, Fabian I. Trinnie, David T. Phillips, Michelle A. Treloar, Cynthia A. Awruck, Anne S. Gason, John Salini, and William C. Hamlett July 2008 Project Number 2002/033 Rapid assessment of sustainability for ecological risk of shark and other chondrichthyan bycatch species taken in the Southern and Eastern Scalefish and Shark Fishery FRDC Report 2002/033 Terence I. Walker, John D. Stevens, J. Matias Braccini, Ross J. Daley, Charlie Huveneers, Sarah B. Irvine, Justin D. Bell, Javier Tovar‐ Ávila, Fabian I. Trinnie, David T. Phillips, Michelle A. Treloar, Cynthia A. Awruck, Anne S. Gason, John Salini, and Hamlett, W. C. Published by Department of Primary Industries, Fisheries Research Brand, Queenscliff, Victoria, 3225. © Fisheries Research and Development Corporation, and Fisheries Victoria. 2008 This work is copyright. Except as permitted under the Copyright Act 1968 (Cth), no part of this publication may be reproduced by any process, electronic or otherwise, without the specific written permission of the copyright owners.
    [Show full text]
  • Using Viviparous Sharks As a Model to Understand Vertebrate Placental Evolution
    Marine and Freshwater Research, 2019, 70, 908–924 © CSIRO 2019 https://doi.org/10.1071/MF18076 Supplementary material Evolution of placentotrophy: using viviparous sharks as a model to understand vertebrate placental evolution Alice L. BuddleA, James U. Van DykeB, Michael B. ThompsonA, Colin A. SimpfendorferC and Camilla M. WhittingtonD,E AThe University of Sydney, School of Life and Environmental Sciences, Heydon-Laurence Building (A08), NSW 2006, Australia. BCharles Sturt University, School of Environmental Sciences, Institute for Land, Water and Society, Albury, NSW 2640, Australia. CJames Cook University, College of Science and Engineering and Centre for Sustainable Tropical Fisheries and Aquaculture, Townsville, Qld 4811, Australia. DThe University of Sydney, Sydney School of Veterinary Science, Camperdown, NSW 2006, Australia. ECorrespondence. Email: [email protected] Page 1 of 23 Marine and Freshwater Research © CSIRO 2019 https://doi.org/10.1071/MF18076 Table S1. Table of known parity mode, mode of embryonic nutrition, and other reproductive parameters of extant shark species Viviparous reproductive modes were assigned to species based on evidence of maternal contributions during pregnancy: lecithotrophic (embryos are reliant on yolk stores), lecithotrophic with histotrophy (embryos absorb maternal secretions in the form of histotroph), placental (development of a placental connection between the embryo and mother during pregnancy; note that placental nutrient transport has not necessarily been shown), oophagy (embryos ingest ova produced by the mother), and adelphophagy (embryos ingest sibling in utero). It should be noted that all viviparous species are initially lecithotrophic Order Family Species Parity mode Mode of Size at Litter size Gestation References embryonic birth range period nutrition (cm) (mean) Carcharhiniformes Carcharhinidae Carcharhinus acronotus Viviparous placental 31–36 1–5 (3.53) 11 months Hamlett 2005; Driggers et al.
    [Show full text]
  • Highly Migratory Shark Fisheries Research by the National Shark Research Consortium (NSRC), 2002-2007
    Highly migratory shark fisheries research by the National Shark Research Consortium (NSRC), 2002-2007 Item Type monograph Authors Hueter, Robert E.; Cailliet, Gregor M.; Ebert, David A.; Musick, John A.; Burgess, George H. Publisher Mote Marine Laboratory Download date 04/10/2021 20:20:49 Link to Item http://hdl.handle.net/1834/31121 HIGHLY MIGRATORY SHARK FISHERIES RESEARCH BY THE NATIONAL SHARK RESEARCH CONSORTIUM 2002-2007 FIVE-YEAR TECHNICAL REPORT TO NOAA/NMFS MOTE MARINE LABORATORY MOSS LANDING MARINE LABORATORIES VIRGINIA INSTITUTE OF MARINE SCIENCE UNIVERSITY OF FLORIDA MOTE MARINE LABORATORY TECHNICAL REPORT NO. 1241 NOAA PROJECT TECHNICAL REPORT Award Number: NA16FL2813 Amount of Award: $ 8,118,351 Project Title: Highly Migratory Shark Fisheries Research by the National Shark Research Consortium (NSRC), 2002-2007 Award Recipient: Mote Marine Laboratory, Sarasota, Florida Award Distributed to: Mote Marine Laboratory, Sarasota, Florida Moss Landing Marine Laboratories, Moss Landing, California Virginia Institute of Marine Science, Gloucester Point, Virginia University of Florida, Gainesville, Florida Award Period: July 1, 2002 to June 30, 2007 EXECUTIVE SUMMARY The National Shark Research Consortium (NSRC) is a scientific collaboration comprising four leading shark research organizations in the U.S.: the Center for Shark Research (CSR) at Mote Marine Laboratory (MML), Sarasota, Florida; the Pacific Shark Research Center (PSCR) at Moss Landing Marine Laboratories (MLML), Moss Landing, California; the Shark Research Program (SRP) at the Virginia Institute of Marine Science (VIMS), Gloucester Point, Virginia; and the Florida Program for Shark Research (FPSR) at the University of Florida, Florida Museum of Natural History (UF/FMNH), Gainesville, Florida. Consortium projects involve NOAA/NMFS-related research and educational activities required for assessing the status of shark stocks, managing U.S.
    [Show full text]
  • The Yellow Stingray, Urobatis Jamaicensis (Chondrichthyes: Urotrygonidae): a Synoptic Review
    Nova Southeastern University NSUWorks Marine & Environmental Sciences Faculty Articles Department of Marine and Environmental Sciences 1-1-2013 The elY low Stingray, Urobatis jamaicensis (Chondrichthyes Urotrygonidae): A Synoptic Review Richard E. Spieler Nova Southeastern University, [email protected] Daniel P. Fahy Nova Southeastern University Robin L. Sherman Nova Southeastern University, [email protected] James Sulikowski Nova Southeastern University T. Patrick Quinn Nova Southeastern University Find out more information about Nova Southeastern University and the Halmos College of Natural Sciences and Oceanography. Follow this and additional works at: https://nsuworks.nova.edu/occ_facarticles Part of the Marine Biology Commons NSUWorks Citation Richard E. Spieler, Daniel P. Fahy, Robin L. Sherman, James Sulikowski, and T. Patrick Quinn. 2013. The eY llow Stingray, Urobatis jamaicensis (Chondrichthyes Urotrygonidae): A Synoptic Review .Caribbean Journal of Science , (1) : 67 -97. https://nsuworks.nova.edu/occ_facarticles/228. This Article is brought to you for free and open access by the Department of Marine and Environmental Sciences at NSUWorks. It has been accepted for inclusion in Marine & Environmental Sciences Faculty Articles by an authorized administrator of NSUWorks. For more information, please contact [email protected]. Caribbean Journal of Science, Vol. 47, No. 1, 67-97, 2013 Copyright 2013 College of Arts and Sciences University of Puerto Rico, Mayagu¨ ez The Yellow Stingray, Urobatis jamaicensis (Chondrichthyes: Urotrygonidae):
    [Show full text]
  • The Yellow Stingray, Urobatis Jamaicensis (Chondrichthyes: Urotrygonidae): a Synoptic Review
    Nova Southeastern University NSUWorks Oceanography Faculty Articles Department of Marine and Environmental Sciences 1-1-2013 The elY low Stingray, Urobatis jamaicensis (Chondrichthyes Urotrygonidae): A Synoptic Review Richard E. Spieler Nova Southeastern University, [email protected] Daniel P. Fahy Nova Southeastern University Robin L. Sherman Nova Southeastern University, [email protected] James Sulikowski Nova Southeastern University T. Patrick Quinn Nova Southeastern University Find out more information about Nova Southeastern University and the Oceanographic Center. Follow this and additional works at: http://nsuworks.nova.edu/occ_facarticles Part of the Marine Biology Commons NSUWorks Citation Richard E. Spieler, Daniel P. Fahy, Robin L. Sherman, James Sulikowski, and T. Patrick Quinn. 2013. The eY llow Stingray, Urobatis jamaicensis (Chondrichthyes Urotrygonidae): A Synoptic Review .Caribbean Journal of Science , (1) : 67 -97. http://nsuworks.nova.edu/occ_facarticles/228. This Article is brought to you for free and open access by the Department of Marine and Environmental Sciences at NSUWorks. It has been accepted for inclusion in Oceanography Faculty Articles by an authorized administrator of NSUWorks. For more information, please contact [email protected]. Caribbean Journal of Science, Vol. 47, No. 1, 67-97, 2013 Copyright 2013 College of Arts and Sciences University of Puerto Rico, Mayagu¨ ez The Yellow Stingray, Urobatis jamaicensis (Chondrichthyes: Urotrygonidae): a synoptic review Richard E. Spieler1,2,3,*, Daniel P. Fahy1,2,
    [Show full text]
  • Life Histories and Brain Evolution of Sharks, Rays, and Chimaeras
    Life histories and brain evolution of sharks, rays, and chimaeras by Christopher Graham Mull M.Sc., California State University Long Beach, 2007 B.Sc., University of California Davis, 2003 Thesis Submitted in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in the Department of Biological Sciences Faculty of Science © Christopher Graham Mull 2017 SIMON FRASER UNIVERSITY Spring 2017 Approval Name: Christopher Graham Mull Degree: Doctor of Philosophy Title: Life histories and brain evolution of sharks, rays, and chimaeras Examining Committee: Chair: Isabelle Côté Professor Nicholas Dulvy Senior Supervisor Professor Kara Yopak Supervisor Assistant Professor University of North Carolina Wilmington Bernard Crespi Supervisor Professor Arne Mooers Supervisor Professor John Reynolds Internal Examiner Professor Department of Biological Sciences Adam Summers External Examiner Professor Friday Harbor Laboratories University of Washington Date Defended/Approved: March 03, 2017 ii Ethics Statement iii Abstract The brain is perhaps one of the most fundamental organs in all vertebrates. It determines not only an individual’s ability to sense and process stimuli from the environment, but is also crucial in maintaining internal homeostatic processes as well as determining an individual’s cognitive abilities. Brains come at a steep energetic cost however, with neural tissue requiring ~20 times the energy of muscle tissue. With such an important role to play, the ‘expensive brain hypothesis’ was been established to understand the evolutionary correlates of brain size. Maternal investment, defined as energetic investment during development, is a strong underlying factor in brain size evolution where higher energy investment from mothers is associated with increased brain size. However, much of what we know about brains comes from studying birds and mammals, while generally overlooking other vertebrate classes.
    [Show full text]
  • Reproductive Strategy of the Giant Electric Ray in the Southern Gulf of California María I
    The University of Southern Mississippi The Aquila Digital Community Faculty Publications 1-1-2017 Reproductive Strategy of the Giant Electric Ray in the Southern Gulf of California María I. Burgos-Vázquez Instituto Politécnico Nacional, [email protected] Paola A. Mejía-Falla SQUALUS Victor H. Cruz-Escalona Instituto Politécnico Nacional, [email protected] Nancy Brown-Peterson University of Southern Mississippi, [email protected] Follow this and additional works at: https://aquila.usm.edu/fac_pubs Part of the Marine Biology Commons Recommended Citation Burgos-Vázquez, M. I., Mejía-Falla, P. A., Cruz-Escalona, V. H., Brown-Peterson, N. (2017). Reproductive Strategy of the Giant Electric Ray in the Southern Gulf of California. Marine and Coastal Fisheries, 9(1), 577-596. Available at: https://aquila.usm.edu/fac_pubs/14963 This Article is brought to you for free and open access by The Aquila Digital Community. It has been accepted for inclusion in Faculty Publications by an authorized administrator of The Aquila Digital Community. For more information, please contact [email protected]. Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science 9:577–596, 2017 Published with license by the American Fisheries Society ISSN: 1942-5120 online DOI: https://doi.org/10.1080/19425120.2017.1370042 ARTICLE Reproductive Strategy of the Giant Electric Ray in the Southern Gulf of California María I. Burgos-Vázquez* Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Avenida I.P.N. s/n, Colonia Playa Palo de Santa Rita, Apartado Postal 592, La Paz, Baja California Sur CP 23096, México Paola A. Mejía-Falla Fundación Colombiana para la Investigación y Conservación de Tiburones y Rayas, SQUALUS, Calle 10A 72-35, Cali, Colombia Víctor H.
    [Show full text]
  • Reproduction and Embryonic Development of the Red Stingray Hemitrygon Akajei from Ariake Bay, Japan
    Ichthyological Research https://doi.org/10.1007/s10228-019-00687-9 MONOGRAPH Reproduction and embryonic development of the red stingray Hemitrygon akajei from Ariake Bay, Japan Keisuke Furumitsu1 · Jennifer T. Wyfels2,3 · Atsuko Yamaguchi1 Received: 6 September 2018 / Revised: 18 December 2018 / Accepted: 24 February 2019 © The Author(s) 2019 Abstract The reproductive system of the red stingray Hemitrygon akajei was described from 1,418 specimens, 682 males and 736 females, sampled year-round (2003–2014) from Ariake Bay to provide reproductive life history information for conservation and management of the species. Females reach sexual maturity at a larger size than males with the size at 50% sexual maturity 522.2 mm disc width (DW) and 321.5 mm DW, respectively. Male stingrays had semen in the seminal vesicles year-round. Dental sexual dimorphism was aseasonal. The mating period is protracted, spanning 7 consecutive months October–April but ovulation occurred during May. This suggests female sperm storage, which has not been described for dasyatid stingrays. Females have a single functional ovary and uterus (left) and reproduce via aplacental viviparity with lipid histotrophy. Gesta- tion required 3 months with parturition during late July and early August. Uterine eggs without macroscopic embryos were observed during the frst half of gestation suggesting a short period of arrested development or diapause. Developmental cohorts based on morphological features were described for embryos and can be used to characterize embryo growth and development for other stingray species. Observations of foetal mortality (1.25%) and morphologically abnormal embryos (0.72%) were uncommon. Pregnancy rate was 90% and reproduction was annual and synchronous.
    [Show full text]
  • Database of Bibliography of Living/Fossil Sharks and Rays (Chondrichtyes: Selachii)
    www.shark-references.com Version 28.01.2019 Bibliography database of living/fossil sharks, rays and chimaeras (Chondrichthyes: Elasmobranchii, Holocephali) Papers of the year 2018 published by Jürgen Pollerspöck, Benediktinerring 34, 94569 Stephansposching, Germany and Nicolas Straube, Munich, Germany ISSN: 2195-6499 DOI: copyright by the authors 1 please inform us about missing papers: [email protected] www.shark-references.com Version 28.01.2019 Abstract: This paper contains a collection of 722 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 2018. 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 2018, list of descriptions of extinct and extant species from 2018, 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 2018 in a hot spot analysis. 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]
  • Dissertation the Processes For
    DISSERTATION THE PROCESSES FOR DETERMINING THE RISK FACTORS INVOLVED WITH THE MORBIDITY AND MORTALITY OF THE SOUTHERN STINGRAY, DASYATIS AMERICANA, AT AN AQUARIUM Submitted by Krystan R. Grant Department of Clinical Sciences In partial fulfillment of the requirements For the Degree of Doctor of Philosophy Colorado State University Fort Collins, Colorado Fall 2016 Doctoral Committee: Advisor: Terry W. Campbell Randall J. Basaraba Gene W. Gloeckner Ashley E. Hill Copyright by Krystan R. Grant 2016 All Rights Reserved ABSTRACT THE PROCESSES FOR DETERMINING THE RISK FACTORS INVOLVED WITH THE MORBIDITY AND MORTALITY OF THE SOUTHERN STINGRAY, DASYATIS AMERICANA, AT AN AQUARIUM During the first few years of opening a new touch pool exhibit, approximately 36 southern stingrays died at the Downtown Aquarium in Denver. Many of these stingrays presented with similar necropsy findings: a small, dark (described as dark, dark brown, black, or blue) liver indicative of lipid and glycogen storage depletion and many of the females were described as having oophoritis. At the time, only limited information was available regarding anatomy, clinical diagnostics (hematologic and plasma biochemical profiles and imaging), and histology for southern stingrays. As this project progressed and the need for this information became apparent, much of it was compiled and organized into a website or desktop application (Appendix 4) in order to provide baseline knowledge. The first part of this project involved reviewing the gross necropsy reports, histopathology reports, and histology slides. The gross necropsy reports were divided among stingrays with known and unknown causes of death. Known causes of death included water quality mishaps and accidental deaths from inadvertently jumping out of the exhibit.
    [Show full text]