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Influences of underwater bottom topography and geomorphology on minke whale (Balaenoptera acutorostrata) distribution in the Mingan Islands (Canada)

Published online by Cambridge University Press:  12 August 2003

Marie-José Naud
Affiliation:
Mingan Island Cetacean Study, 285, Green, St-Lambert (Québec), J4P 1T3, Canada Institut des Sciences de la Mer, Université du Québec à Rimouski, 310, Allée des Ursulines, Rimouski (Québec), G5L 3A1, Canada
Bernard Long
Affiliation:
INRS-Géoressources, 880, Chemin Sainte-Foy, C.P.O7500, Sainte-Foy, (Québec), G1V 4C7, Canada
Jean-Claude Brêthes
Affiliation:
Institut des Sciences de la Mer, Université du Québec à Rimouski, 310, Allée des Ursulines, Rimouski (Québec), G5L 3A1, Canada
Richard Sears
Affiliation:
Mingan Island Cetacean Study, 285, Green, St-Lambert (Québec), J4P 1T3, Canada

Abstract

Minke whale (Balaenoptera acutorostrata) distribution was derived from a 12 year observation programme in the Mingan Islands (Canada) and related to three geological features of the sea-floor: maximum depth, topography and geomorphology. Minke whale distribution was not uniform nor random in relation to maximum depth and topography, however, no evident trend was found. The most prominent factor was the presence of underwater sand dunes, where significantly more minke whales were observed than on any other bottom types. Because sand dunes are the favoured habitat of the minke whale major prey in the study area, an indirect link between minke whale distribution, geomorphology and substrate type is suggested.

Type
Research Article
Copyright
2003 Marine Biological Association of the United Kingdom

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