[MARMAM] New Article: Cetaceans in offshore Gabonese waters, West Africa

Marijke de Boer marijke.deboer at yahoo.co.uk
Sat Nov 27 01:16:11 PST 2010

Dear Colleagues,

I am pleased to announce the following paper recently published in  the Journal of the Marine Biological
Association of the United


Cetacean distribution and relative abundance in offshore
Gabonese waters. Journal of the Marine Biological Association of the United Kingdom,
90, pp 1613-1621 


Marijke N. de Boer (2010).


Information on cetaceans off Gabon
in tropical West Africa is summarized from
boat-based surveys carried out between 7 March and 7 August 2009. Thirteen
cetacean species were positively identified comprising two baleen whale
species, one sperm whale species and ten species of delphinid. Bryde's whale (Balaenoptera
brydei) and humpback whale (Megaptera novaeangliae) were the most
frequently encountered species. Cetaceans were found throughout a range of sea
surface temperature between 20.5°C and 27.5°C and a wide range of depths with
the majority of effort and sightings occurring seaward of the shelf break. Of
particular interest from the study were the following: (1) Gabonese waters have
a broad cetacean diversity, especially with a large and diversified delphinid
community in the northern part of the study area; (2) the variations in
oceanographic conditions within Gabonese waters are likely to result in a
temporal variation in species composition; (3) the sightings of Atlantic
spotted dolphin (Stenella frontalis) are the first at-sea sightings
confirmed for these waters, although not unexpected given their distribution
and abundant presence in surrounding waters; and (4) the poorly known Clymene
dolphin (Stenella clymene) was sighted on four occasions in deep
oceanic waters and was the most abundant cetacean. These are the first
confirmed records of Clymene dolphins in Gabonese waters.

This article is now available online at:


Thank you to all that helped me with information and the writing of this


Marijke de Boer,

Ph.D candidate

Marijke.deboer at wur.nl

Wageningen IMARES, Institute for Marine Resources and Ecosystem Studies,

Postbus 167, 1790 AD Den Burg, The Netherlands

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