Monitoring Winter and Summer Abundance of Cetaceans in the Pelagos Sanctuary (Northwestern Mediterranean Sea) Through Aerial Surveys

Systematic long-term monitoring of abundance is essential to inform conservation measures and evaluate their effectiveness. To instigate such work in the Pelagos Sanctuary in the Mediterranean, two aerial surveys were conducted in winter and summer 2009. A total of 467 (131 in winter, 336 in summer) sightings of 7 species was made. Sample sizes were sufficient to estimate abundance of fin whales in summer (148; 95% CI = 87–254) and striped dolphins in winter (19,462; 95% CI = 12 939–29 273) and in summer (38 488; 95% CI = 27 447–53 968). Numbers of animals within the Sanctuary are significantly higher in summer, when human activities and thus potential population level impacts are highest. Comparisons with data from past shipboard surveys suggest an appreciable decrease in fin whales within the Sanctuary area and an appreciable increase in striped dolphins. Aerial surveys proved to be more efficient than ship surveys, allowing more robust estimates, with smaller CIs and CVs. These results provide essential baseline data for this marine protected area and continued regular surveys will allow the effectiveness of the MPA in terms of cetacean conservation to be evaluated and inform future management measures. The collected data may also be crucial in assessing whether ship strikes, one of the main causes of death for fin whales in the Mediterranean, are affecting the Mediterranean population.

• Publication year

  2011

• Venue

  PLoS ONE

• Publication date

  2011-07-29

• Fields of study

  Biology, Medicine, Environmental Science

• Identifiers
  DOI 10.1371/journal.pone.0022878PMID 21829544PMCID 3146501
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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• VOCAL ACTIVITY OF FIN WHALES, BALAENOPTERA PHYSALUS, IN THE LIGURIAN SEA

  2002cited by this paper
• Introduction to distance sampling : estimating abundance of biological populations

  2001influential reference
• Accounting for responsive movement in line transect estimates of abundance

  2001cited by this paper
• Genetic differentiation in the striped dolphin Stenella coeruleoalba from European waters according to mitochondrial DNA (mtDNA) restriction analysis

  1999cited by this paper
• Marine Mammal Survey and Assessment Methods

  1999cited by this paper
• Marine Protected Area Design and the Spatial and Temporal Distribution of Cetaceans in a Submarine Canyon

  1999cited by this paper
• Geographical variation in abundance of striped and common dolphins of the western Mediterranean

  1998cited by this paper
• Population genetic structure of North Atlantic, Mediterranean Sea and Sea of Cortez fin whales, Balaenoptera physalus (Linnaeus 1758): analysis of mitochondrial and nuclear loci

  1998cited by this paper
• Abundance of fin whales and striped dolphins summering in the Corso-Ligurian Basin

  1995cited by this paper
• Contrôle du phytoplancton du bassin Ligure par le front liguro-provençal (secteur Corse)

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• DISTRIBUTION and NUMBERS OF STRIPED DOLPHINS IN THE WESTERN MEDITERRANEAN SEA AFTER THE 1990 EPIZOOTIC OUTBREAK

  1994cited by this paper
• A POWER ANALYSIS FOR DETECTING TRENDS

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• A new look at the statistical model identification

  1974cited by this paper
• System identification and time-series analysis

  1974cited by this paper
• An approximate distribution of estimates of variance components.

  1946influential reference
• An approximate distribution of estimates of variance components.

  1946cited by this paper

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• Winter habitat preferences of cetaceans in the Northwestern mediterranean sea

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• Seasonal habitat suitability and distribution patterns of Mediterranean fin whales

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• Dolphin Morbillivirus in a Cuvier’s Beaked Whale (Ziphius cavirostris), Italy

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• The importance of Portuguese Continental Shelf Waters to Balearic Shearwaters revealed by aerial census

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• Satellite tagging of Mediterranean fin whales: working towards the identification of critical habitats and the focussing of mitigation measures

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• North Western Mediterranean Sea, Slope and Canyon System Important Marine Mammal Area-IMMA Description

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  2015influential citation
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• Cetacean response to summer maritime traffic in the Western Mediterranean Sea.

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  2014cites this paper
• An index based on the biodiversity of cetacean species to assess the environmental status of marine ecosystems.

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• CHEMICAL POLLUTION AND MARINE MAMMALS

  2014cites this paper
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• The Yangtze finless porpoise: On an accelerating path to extinction?

  2014cites this paper
• The Pelagos Sanctuary for Mediterranean marine mammals: Marine Protected Area (MPA) or marine polluted area? The case study of the striped dolphin (Stenella coeruleoalba).

  2013cites this paper
• Biological threats and environmental pollutants, a lethal mixture for mediterranean cetaceans?

  2013cites this paper