Echolocation detections and digital video surveys provide reliable estimates of the relative density of harbour porpoises

Williamson, Laura D.; Brookes, Kate L.; Scott, Beth E.; Graham, Isla M.; Bradbury, Gareth; Hammond, Philip S.; Thompson, Paul M.
Methods in Ecology and Evolution (2016)

1. Robust estimates of the density or abundance of cetaceans are required to support a wide range of ecological studies and inform management decisions. Considerable effort has been put into…


Mitochondrial control region variability of baiji and the Yangtze finless porpoises, two sympatric small cetaceans in the Yangtze river

Yang, Guang; Liu, Shan; Ren, Wenhua; Zhou, Kaiya; Wei, Fuwen
Acta Theriologica (2003)

Baiji Lipotes vexillifer (Miller, 1918) and the Yangtze finless porpoise Neophocaena phocaenoides asiaeorientalis (Pilleri and Gihr, 1972) are two sympatric small cetaceans inhabiting the middle and lower reaches of the…


A global review of porpoise (Cetacea: Phocoenidae) mortality in gillnets

Jefferson, Thomas A.; Curry, Barbara E.
Biological Conservation (1994)

A global review of mortality of porpoises in gillnet fisheries indicates that individuals of all six species become entangled and die in gillnets. Harbor porpoises Phocoena phocoena are taken throughout…


Measuring the economic value of increased precision in scientific estimates of marine mammal abundance and bycatch: Harbor porpoise Phocoena phocoena in the northeast U.S. gill-net fishery

Bisack, Kathryn D.; Magnusson, Gisele
North American Journal of Fisheries Management (2014)

Marine mammal stock assessments provide information that is valuable to public sector management and the private fishing sector; however, data are costly to collect. The precautionary approach, which is widely…