Dall's Porpoise

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Dall’s Porpoise

 

(Phocaenoides dalli), a mammal of the family Phocaenidae. The body is up to 2 m long. The teeth are very small, with up to 24 pairs in the upper jaw and up to 28 pairs in the lower. The coloration of the body is dark, with white sides and abdomen, and the edges of the caudal and dorsal fins are also white; on each side of the body is a large white field, or “wing,” hence its name in Russian of belokrylaia morskaia svin’ia (white-winged sea pig). The animal can move with great speed; it has a sharply enlarged heart and an increased volume of blood, as well as tall keels (upper and lower) on the caudal stem. The Dall’s porpoise lives in the northern half of the Pacific Ocean, to the north of California and Japan, and in the Sea of Okhotsk, the Sea of Japan, and the Bering Sea. It sometimes visits the Sea of Chukotsk. Its main food is cephalopods and also fish. The animals stay in small groups. They have no commercial significance.

REFERENCE

A. V. IABLOKOV

References in periodicals archive ?
Other marine mammals known to inhabit Cook Inlet, such as killer whales, Orcinus orca; Steller sea lions, harbor porpoise, Phocoena phoconea; and Dali's porpoise, Phocoenoides dalli, were not observed.
Prey species included Dall's porpoise Phocoenoides dalli, Pacific white-sided dolphins Lagenoryhncus obliquidens, harbor porpoise Phocoena phocoena, minke whales Balaenoptera acutorostrata, Steller sea lions Eumetopias jubatus and harbor seals Phoca vitulina.
Although specimens were not always identified to species, only two types of porpoise occur in Alaska waters, harbor porpoise and Dali's porpoise, Phocoenoides dalli.
1959) and two odontocete species: Pacific white-sided dolphins, Lagenorhynchus obliquidens, and Dall's porpoise, Phocoenoides dalli (Fig.
In 1997, the NMML began a series of surveys conducted over a 3-year period to estimate abundances of harbor porpoise, Dall's porpoise, Phocoenoides dalli, and Pacific white-sided dolphins, Lagenorhynchus obliquidens (Waite and Hobbs (14,15)).
Striped dolphin Sterzella coeruleoalba Pacific white-sided dolphin Lagenorhynchus obliquidens Northern right whale dolphin Lissodelphis borealis Unidentified delphinoid Large delphinids Bottlenose dolphin Tursiops truncatus Risso's dolphin Grampus griseus Short-finned pilot whale Glohiceplzalus macrorhynchus Dall's porpoise Phocoenoides dalli Small whales Small beaked whales Mesoplodon spp.
Low to moderate reactions by Dall's porpoise, Phocoenoides dalli, were observed during the first several minutes after tag deployment (Hanson and Baird, 1998; Hanson et al.
Squids eaten by Dall's porpoises, Phocoenoides dalli in the northwestern North Pacific and in the Bering Sea.
1976), Lissodelphis borealis (Ferrero and Walker, 1993), and Phocoenoides dalli (Ferrero and Walker, 1999), and in the weight of male Tursiops truncatus (Cockroft and Ross, 1990).