Synergistic patterns of threat and the challenges facing global anguillid eel conservation

Global Ecology and Conservation

Pierre Sasal¹  Alan M. Walker²  Matthew J. Gollock³  Kenzo Kaifu⁴  Hyojin Ahn⁵  Kazuo Uchida⁶  Kevin G. Smith⁷  David M.P. Jacoby⁸  Tagried Kurwie⁹  John M. Casselman^1,10  Anders M.C. Silfvergrip^1,11  Vicki Crook^1,12  Mari-Beth DeLucia^1,13 

[1] CRIOBE, USR 3278–CNRS–EPHE - UPVD, Laboratoire d’Excellence Corail, BP 1013 - 98729, Papetoai, Moorea, French Polynesia;Centre for Environment, Fisheries and Aquaculture Science, Pakefield Road, Lowestoft, Suffolk, NR33 0HT, UK;Conservation Programmes, Zoological Society of London, Regent’s Park, London NW1 4RY, UK;Faculty of Law, Chuo University, 742-1 Higashi-Nakano, Hachioji-shi, Tokyo 192-0393, Japan;Fisheries Laboratory, Kinki University, Shirahama 3153, Nishimuro, Wakayama 649-2211, Japan;Fisheries Research Agency, Queen‘s Tower B, 15F 2-3-3 Minato Mirai, Nishi-ku, Yokohama-shi, Kanagawa 220-6115, Japan;Global Species Programme, IUCN (International Union for Conservation of Nature), 219c Huntingdon Road, Cambridge, CB3 ODL, UK;Institute of Zoology, Zoological Society of London, Regent’s Park, London NW1 4RY, UK;Mahurangi Technical Institute, 11 Glemnore Drive, Warkworth, 0910, New Zealand;Queen’s University, Department of Biology, Kingston, Ontario, Canada K7L 3N6;Stockholm, Sweden;TRAFFIC, 219a Huntingdon Road, Cambridge, CB3 0DL, UK;The Nature Conservancy, Eastern NY Chapter, 108 Main St. New Paltz, NY, 12561, USA;

关键词: Anguillidae;    Freshwater eels;    Population trends;    Red List;    Threats;    Vulnerability;   

DOI  :  10.1016/j.gecco.2015.07.009

来源: DOAJ

【 摘 要 】

With broad distributions, diadromous fishes can be exposed to multiple threats at different stages of development. For the primarily catadromous eels of the family Anguillidae, there is growing international concern for the population abundance and escapement trends of some of these species and yet incomplete knowledge of their remarkable life-histories hampers management and conservation. Anguillids experience a suite of pressures that include habitat loss/modification, migration barriers, pollution, parasitism, exploitation, and fluctuating oceanic conditions that likely have synergistic and regionally variable impacts, even within species. In beginning to redress this rather fragmented picture, we evaluated the extinction risk of these species using the IUCN Red List of Threatened Species Categories and Criteria to infer population-wide trends from catch and monitoring data. Here we consolidate and build upon these species assessments by presenting an overview of the current state of global eel data and conservation, categorising the knowledge gaps and geographic regions where resources are needed and discussing future recommendations to improve our understanding of anguillids. We find stark disparity between the quality and length of data available to assess population trends and conservation priorities in temperate and tropical anguillids. Of the 13 species assessed, four were listed as ‘Threatened’ (Vulnerable, Endangered or Critically Endangered); four were Near Threatened, three were Data Deficient and two were deemed Least Concern. Comparing with other diadromous species, we examine the multiple threats that impact eels during their different life-history stages, highlighting the challenges of applying the Red List Categories and Criteria to geographically-expansive, catadromous and panmictic groups of species.

【 授权许可】

Unknown