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Global Coverage of Cetacean Line-Transect Surveys: Status Quo, Data Gaps and Future Challenges

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  • Kristin Kaschner
  • Nicola J Quick
  • Rebecca Jewell
  • Rob Williams
  • Catriona M Harris

Abstract

Knowledge of abundance, trends and distribution of cetacean populations is needed to inform marine conservation efforts, ecosystem models and spatial planning. We compiled a geo-spatial database of published data on cetacean abundance from dedicated visual line-transect surveys and encoded >1100 abundance estimates for 47 species from 430 surveys conducted worldwide from 1975–2005. Our subsequent analyses revealed large spatial, temporal and taxonomic variability and gaps in survey coverage. With the exception of Antarctic waters, survey coverage was biased toward the northern hemisphere, especially US and northern European waters. Overall,

Suggested Citation

  • Kristin Kaschner & Nicola J Quick & Rebecca Jewell & Rob Williams & Catriona M Harris, 2012. "Global Coverage of Cetacean Line-Transect Surveys: Status Quo, Data Gaps and Future Challenges," PLOS ONE, Public Library of Science, vol. 7(9), pages 1-12, September.
    • Handle: RePEc:plo:pone00:0044075
    DOI: 10.1371/journal.pone.0044075
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    1. C. R. Margules & R. L. Pressey, 2000. "Systematic conservation planning," Nature, Nature, vol. 405(6783), pages 243-253, May.
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