La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Effect of ship speed on seabird counts in areas supporting commercial fisheries
Auteurs :	S. Garthe, Auteur ; O. Huppop, Auteur
Type de document :	Article
Dans :	Journal of Field Ornithology (70(1) WIN 1999)
Article en page(s) :	28-32
Langues:	Anglais
Résumé :	Ship speed may have an important effect on the results of seabird surveys. We counted seabirds on a 20.5 X 0.3 km transect in the Kattegat that was sailed nine rimes with the RV "Heincke." Ship speed alternated between 9 knots and 5 knots. The numbers of the most common species, the Lesser Black-backed Gull (Larusfuscus), were significantly higher when the ship was sailing at lower speed similar to that of commercial fishing vessels when trawling in the area. It is postulated that scavenging species (e.g., gulls) are attracted to the low speed of vessels whereas non-scavengers (e.g., auks) are not.

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