Report of the International Whaling Commission (1994)
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…
Coastal fisheries and cetacean mortality in Portugal
Sequeira, M.; Ferreira, C.
Report of the International Whaling Commission (1994)
Considerable numbers of cetaceans are killed incidentally every year during fishing operations on the Portuguese coast. Although a small number of marine mammals are caught by trawlers and fishing traps,…
Incidental catches of harbour porpoises (Phocoena phocoena) in Danish waters, 1986-89
Kinze, C. C.
Report of the International Whaling Commission (1994)
Incidental catches of harbour porpoises (Phocoena phocoena) were studied for the years 1986-89 by means of a salvage programme, an interview survey and a small scale reporting scheme. Data were…
A note on odontocete mortality from fishing gear entanglements off southern California
Heyning, J. E.; Lewis, T. D.; Woodhouse, C. D.
Report of the International Whaling Commission (1994)
Strandings and sightings data of toothed whales entangled in fishing gear are documented for the Southern California Bight from 1975-90. Entanglements involve three fisheries: a nearshore set gillnet fishery; an…
A review of cetacean and pinniped mortality in coastal fisheries along the west coast of the USA and Canada and the east coast of the Russian Federation
Barlow, J.; Baird, R. W.; Heyning, J. E.; Wynne, K.; Manford, A. M. II; Lowry, L. F.; Hanan, D.; Sease, J.; Burkanov, V. N.
Report of the International Whaling Commission (1994)
Many passive net fisheries exist along the Pacific coastlines of the USA (California, Oregon, Washington and Alaska), Canada (British Columbia) and the Russian Federation. Some incidental marine mammal mortality occurs…
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…