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Marine Mammal Surveys in Dutch Waters in 2014
S. C. V. Geelhoed
Sander Lagerveld
J. P. Verdaat
M. Scheidat
出版
IMARES Wageningen UR
, 2014
URL
http://books.google.com.hk/books?id=ZldprgEACAAJ&hl=&source=gbs_api
註釋
In July 2014 aerial surveys to estimate the abundance of Harbour porpoises Phocoena phocoena on the Dutch Continental Shelf were conducted. In total, 229 sightings of 273 individual Harbour Porpoises were collected. Porpoise densities varied between 0.37-3.08 animals/km2 in the (four) different areas. The overall density on the entire Dutch Continental Shelf was 1.29 animals/km2.
