Effects of Beaufort sea state heterogeneities on density estimates of harbor porpoises from data collected during 'independent' team line transect sighting surveys are investigated. The surveys were conducted in the…
The paper reports on research into the available published literature concerning those smaller cetaceans which penetrate into the Baltic Sea, bearing in mind that the Skagerrak is not included in…
Morphological differentiation in skull shape in small toothed whales is sometimes explained as driven by differences in ontogeny or adaptation to a benthic or pelagic habitat. To test these hypotheses,…
The records of strandings of the harbour porpoise (Phocoena phocoena) on British coasts were analysed for the period 1913-1979. No significant upward or downward trend was found for the record…
Results of an aerial sightings survey conducted in coastal (within the 600m depth contour) Icelandic waters from 27 June-20 July 1986 are presented. The survey followed a predetermined random grid,…
To reduce incidental catch of cetaceans in gillnets, two forms of acoustic modifications are reviewed here; one to make gillnets more reflective to cetacean sonar, and another using active sound…
We present the results of an aerial line transect census of cetaceans along the California coast during March and April 1991. This survey was the first of two aerial surveys…
(...) Studies on the biology and ecology of the species [harbour porpoise] by the University of Guelph, largely sponsored by the National Research Council of Canada, were begun in the…
A live-stranded harbor porpoise Phocoena phocoena was found on the west coast of the Dutch island Texel (North Sea) and transported to a rehabilitation center for small cetaceans, where it…
The distribution of marine predators is tightly coupled with that of their prey, and may also be affected by interactions between competing predators. In order to adopt an ecosystem approach…