期刊
RESPIRATORY PHYSIOLOGY & NEUROBIOLOGY
卷 167, 期 3, 页码 235-246出版社
ELSEVIER
DOI: 10.1016/j.resp.2009.04.023
关键词
Northern bottlenose whale; Cuvier's beaked whale; Blainville's beaked whale; Decompression sickness; Diving physiology
资金
- Office of Naval Research [N00014-07-1-1098]
- Royal Society Dorothy Hodgkin
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- WWF-Canada
- Southwest Fisheries Science Center of NOAA Fisheries
- U.S. Navy [N45]
- Wild Whale Research Foundation
- Natural Environment Research Council [smru10001] Funding Source: researchfish
A mathematical model, based on current knowledge of gas exchange and physiology of marine mammals, was used to predict blood and tissue tension N-2 (P-N2) using field data from three beaked whale species: northern bottlenose whales, Cuvier's beaked whales, and Blainville's beaked whales. The objective was to determine if physiology (body mass, diving lung volume, dive response) or dive behaviour (dive depth and duration, changes in ascent rate, diel behaviour) would lead to differences in P-N2 levels and thereby decompression sickness (DCS) risk between species. Diving lung volume and extent of the dive response had a large effect on end-dive P-N2. The dive profile had a larger influence on end-dive P-N2 than body mass differences between species. Despite diel changes in dive behaviour, P-N2 levels showed no consistent trend. Model output suggested that all three species live with tissue P-N2 levels that would cause a significant proportion of DCS cases in terrestrial mammals. Cuvier's beaked whale diving behaviour appears to put them at higher risk than the other species, which may explain their prevalence in strandings after the use of mid-frequency sonar. (C) 2009 Elsevier B.V. All rights reserved.
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