Marine Biology Research (2006)
The by-caught harbour porpoises in commercial fisheries have raised concerns over their conservation status in the Baltic region. One important aspect for management purposes is porpoise movements within the region.…
Geographical variation in harbour porpoise (Phocoena phocoena) skulls: Support for a separate non-migratory population in the Baltic proper
Huggenberger, S.; Benke, H.; Kinze, C.C.
Ophelia (2002)
We measured metric and scored non-metric characters of 242 harbour porpoise (Phocoena phocoena) skulls from the North and the Baltic Sea and subdivided them into three geographical areas: The German…
Population status, threats and conservation of the Yangtze finless porpoise
Wang, Ding
Chinese Science Bulletin (2009)
The Yangtze finless porpoise (Neophocaena phocaenoides asiaeorientalis) is currently limited to the middle and lower reaches of the Yangtze River from Yichang to Shanghai, China, and the adjoining Poyang and…
Harbour porpoises in the north Atlantic: edited extract from the Report of the IWC Scientific Committee, Dublin 1995
Donovan, G.P.; Bjorge, A.
Report of the International Whaling Commission (1995)
At the meeting of the IWC Scientific Committee held in Dublin in May 1995, the special topic addressed by the sub-committee on small cetaceans was the North Atlantic harbour porpoise.…
Abundance estimate of the Gulf of Maine harbor porpoise
Palka, D.
Report of the International Whaling Commission (1995)
Shipboard surveys were conducted in the summer of 1991 to estimate the abundance of harbor porpoises, Phocoena phocoena, in the northern Gulf of Maine and lower Bay of Fundy. The…
Double team field tests of line transect methods for shipboard sighting surveys for harbor porpoises
Polacheck, T.
Report of the International Whaling Commission (1995)
Results from experiments designed to test the robustness and reliability of shipboard line transect methods for estimating harbor porpoise densities are presented. These experiments were conducted in the western Bay…
The effect of increasing observer trackline effort in shipboard line transect surveys for harbor porpoise
Polacheck, T.
Report of the International Whaling Commission (1995)
Previous double team experiments testing line transect methodology for harbor porpoise indicated that a relatively small proportion of the sightings were actually seen by both teams. Results of an additional…
Distribution and abundance of harbour porpoise, Phocoena phocoena, in Norwegian waters
Bjorge, A.; Oien, N.
Report of the International Whaling Commission (1995)
This paper presents information on the distribution of harbour porpoise in Norwegian coastal and adjacent waters based on incidental sightings during the period 1964-1968, bycatches in the driftnet salmon fishery…
Sightings of harbour porpoises (Phocoena phocoena) in Swedish waters before 1990
Berggren, P.; Arrhenius, F.
Report of the International Whaling Commission (1995)
This paper examines trends in abundance and distribution of harbour porpoises in Swedish waters. Returns from questionnaires suggested a decline in number of sightings per year in all areas around…
Densities and seasonal distribution of harbour porpoises (Phocoena phocoena) in the Swedish Skagerrak, Kattegat and Baltic seas
Berggren, P.; Arrhenius, F.
Report of the International Whaling Commission (1995)
Strip transect aerial surveys were conducted in the Skagerrak and Kattegat Seas for 8 days in June-August, and 2 days in October 1991. Nine sightings of harbour porpoises were recorded…