Sensory Abilities of Cetaceans (1990)
(...)In the Bering Sea, marine mammals, particularly Dall's porpoises, Phocoenoides dalli, get incidentally entangled in gillnets of the Japanese mothership salmon fishery. The maximum total number of Dall's porpoises to…
Sensory Abilities of Cetaceans (1990)
(...) Organization of the visual system in Cetacea still remains unclear in many respects. Of special interest are data on ganglion cell distribution in the retina. It is related closely…
Biological Conservation (1990)
The small cetacean catch by artisanal fishermen in Peru was the subject of a IUCN/UNEP project in 1985–1986. In a follow-up study during 1987 we monitored the port of Pucusana,…
Aquatic Mammals (1990)
This study shows that in Bottlenose dolphins and in Harbour porpoises the presence of marginal papillae is age related. In Bottlenose dolphins the papillae disappear around the age of 16…
Aquatic Mammals (1990)
In March 1988 three Harbour porpoises (Phocoena phocoena) were stranded on the Dutch coast and sent to the Harderwijk Marine Mammal Park for rehabilitation. The following parameters were recorded during…
Report of the International Whaling Commission (1990)
Information on the movement of cetaceans in relation to survey vessels is important for determining if abundance and density estimates from ship-based line transect sighting surveys are biased. A ship-based…
Aquatic Mammals (1990)
(...) Tuberous organs in the integument of the harbour porpoise were briefly described for the first time in connection with other nerve end corpuscles in the tongue (Behrmann, 1988). A…
Aquatic Mammals (1990)
From length and girth measurements of live stranded animals, treated at the Harderwijk Marine Mammal Park, a formula has been developed to calculate the body weight of Harbour porpoises from…
Fishery Bulletin (1990)
Examination of 95 Dall's porpoise specimens incidentally caught in gill nets, and 4 collected as beach strandings, indicate significant sexual dimorphism and developmental variation in several aspects of external morphology…
Report of the International Whaling Commission (1990)
Dorsal fin photographs of Dall's porpoise, Phocoenoides dalli, were taken in northern Puget Sound, Washington in order to assess the feasibility of using photo-identification techniques in studies of this species.…