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Title

Exploring cetacean stranding pattern in light of variation in at-sea encounter rate and fishing activity: Lessons from time surveys in the south Bay of Biscay (East-Atlantic; France)

Publication Year

2013

Author(s)
  • Castege, Iker
  • Soulier, Laurent
  • Hemery, Georges
  • Mouches, Claude
  • Lalanne, Yann
  • Dewez, Alexandre
  • Pautrizel, Francoise
  • d'Elbee, Jean
  • D'Amico, Frank
Source
JOURNAL OF MARINE SYSTEMS Volume: 109 Pages: S284-S292 Published: 2013
ISSN
0924-7963
Abstract

To date, the scarcity of year-round and long-term programmes integrating multi-dimensional data has hindered the development of a good understanding of cetacean mortality worldwide. This study uses data from: 1) standardised shipboard surveys (1980-2002), 2) standardised stranding surveys (1980-2002) and 3) landings of fishing fleets (2000-2002) in the Bay of Biscay. It investigates the correlations between stranding, at-sea encounter rate and the fishing index for three common cetaceans: common dolphin (Delphinus delphis), bottlenose dolphin (Tursiops truncatus) and long-finned pilot whale (Globicephala melas). At the monthly scale, a seasonal stranding pattern significantly congruent with the at-sea encounter rate and the fishing index for D. delphis is revealed. At the inter-annual scale, stranding and at-sea encounter rates are shown to be correlated (p = 0.013-0.044 according to species) and significantly increasing in abundance. Temporal variation in the ratio between individuals seen alive at sea and those stranded shows no significant trend suggesting that stranding is better explained by at-sea abundance than by the fishing index. Managers can use these findings to re-evaluate the relative contribution of by-catch fisheries in the context of observed changes of at-sea cetacean abundance and the link to oceano-climatic changes and other anthropogenic causes. (C) 2012 Elsevier B.V. All rights reserved.

Author Keyword(s)
  • Cetacean
  • Shipboard survey
  • Occupancy area
  • Oceano-climatic change
  • Trawl fisheries
  • Over-mortality
KeyWord(s) Plus
  • INFECTIOUS-DISEASE MORTALITY
  • PORPOISES PHOCOENA-PHOCOENA
  • MARINE-MAMMALS
  • HARBOR PORPOISES
  • POLYCHLORINATED-BIPHENYLS
  • INCIDENTAL CATCHES
  • OIL-SPILL
  • NORTH-SEA
  • BY-CATCH
  • WATERS
ESI Discipline(s)
  • Geosciences
  • Plant & Animal Science
Web of Science Category(ies)
  • Geosciences, Multidisciplinary
  • Marine & Freshwater Biology
  • Oceanography
Adress(es)

[Castege, Iker; Pautrizel, Francoise] Ctr Mer Biarritz, F-64200 Plateau Petite Atalaye, Biarritz, France; [Hemery, Georges] Museum Natl Hist Nat, Dept Ecol & Biodivers Management, USM Conservat Species 305, F-64200 Plateau Petite Atalaye, Biarritz, France; [Soulier, Laurent] Inst Milieux Aquat, F-64101 Bayonne, France; [Mouches, Claude; Lalanne, Yann; D'Amico, Frank] UPPA, Dept Ecol, UFR Sci & Tech, F-64600 Anglet, France; [D'Amico, Frank] INRA, UMR ECOBIOP, INRA UPPA Pole Hydrobiol INRA Quartier Ibarron, F-64310 St Pee Sur Nivelle, France; [Mouches, Claude; D'Amico, Frank] MIRA, FED 4155, F-64053 Pau, France; [Dewez, Alexandre] Grp Etud Faune Marine Atlantique, F-40130 Capbreton, France; [d'Elbee, Jean] LAPHY, F-64210 Ahetze, France

Reprint Adress

Castege, I (reprint author), Ctr Mer Biarritz, F-64200 Plateau Petite Atalaye, Biarritz, France.

Country(ies)
  • France
CNRS - Adress(es)
    Accession Number
    WOS:000314427500023
    uid:/7TLQZSFM
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