Ophelia (1992)
Aerial surveys covering 5117 linear kilometers were conducted at 91 and 183 m altitude under optimal sighting conditions in an area north of Fyn, Denmark, and in the Bay of…
The elusive harbour porpoise exposed: Strip transect counts off southwestern Ireland
Leopold, M. F.; Wolf, P. A.; Van Der Meer, J.
Netherlands Journal of Sea Research (1992)
Harbour Porpoises Phocoena phocoena were counted along a 270-km-long transect around southwestern Ireland on 17 July 1989, a day with exceptionally favourable weather conditions. A total of 251 porpoises were…
Investigations on the osteology and the functional morphology of the flipper of whales and dolphins (Cetacea)
Benke, H.
Investigations on Cetacea (1993)
Of the 79 recent species of cetaceans 51 have been examined relative to the osteology of the flipper and the scapula and, in addition to this, video-recordings of 13 different…
Cytoarchitectonic studies of the cerebral cortex of the harbour porpoise, Phocoena phocoena (Linne, 1758)
Behrmann, G.
Investigations on Cetacea (1993)
The olfactory system of the harbour porpoise is reduced but has a function. The visual system of the harbour porpoise is badly developed, and its inferior to the one of…
Preliminary winter abundance estimates for cetaceans along the California coast based on a 1991 aerial survey
Forney, K. A.; Barlow, J.
Report of the International Whaling Commission (1993)
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…
Histological investigations on the thyroid glands of marine mammals (Phoca vitulina, Phocoena phocoena) and the possible implications of marine pollution
Schumacher, U.; Zahler, S.; Horny, H.-P.; Heidemann, G.; Skirnisson, K.; Welsch, U.
Journal of Wildlife Diseases (1993)
In 1988 and 1989, thousands of harbor seals (Phoca vitulina) died in the North Sea from phocine distemper infection. The morphology of thyroid glands from 40 harbor seals found dead…
Prevalence of morbilliviruses among pinniped and cetacean species
Visser, I. K. G.; Van Bressem, M. F.; Van de Bildt, M. W. G;; Groen, J.; Orvell, C.; Raga, J. A.; Osterhaus, A. D. M. E.;
Revue Scientifique et Technique de l'OIE (1993)
Since 1987, morbillivirus infections have caused serious disease outbreaks with high mortality among aquatic mammals. Baikal seals (Phoca sibirica) in Siberia were involved in an outbreak caused by a virus…
A brief review of stock identity in small marine cetaceans in relation to assessment of driftnet mortality in the north Pacific
Perrin, W. F.; Brownell, R. L. Jr.
Report of the International Whaling Commission (1994)
Dolphins of several species are killed incidentally in driftnet fisheries on the high seas in the North Pacific. Information on stock identity, necessary for assessment and management of the dolphin…
Interactions between cetaceans and gillnet and trap fisheries in the Northwest Atlantic
Read, A. J.
Report of the International Whaling Commission (1994)
Gillnet and trap fisheries of the Northwest Atlantic and their potential for cetacean entanglement are reviewed. Ten major categories of passive fisheries are identified, five of which are known to…
Incidental catches of harbour porpoises (Phocoena phocoena) in the Gulf of St. Lawrence and the St. Lawrence River Estuary, Quebec, Canada
Fontaine, P.-M.; Barrette, C.; Hammill, M. O.; Kingsley, M. C. S.
Report of the International Whaling Commission (1994)
Incidental catches of harbour porpoise by commercial fisheries in the Estuary and Gulf of St. Lawrence, Canada were examined. Two questionnaires, one in 1989 and one in 1990, were sent…