harbor seal


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harbor seal,

most commonly seen sealseal,
carnivorous aquatic mammal with front and hind feet modified as flippers, or fin-feet. The name seal is sometimes applied broadly to any of the fin-footed mammals, or pinnipeds, including the walrus, the eared seals (sea lion and fur seal), and the true seals, also called
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 of the Northern Hemisphere, Phoca vitulina. Harbor seals are found along coasts and in sheltered bays and harbors of North America, Europe, and NE Asia. They range farther south than any other northern seal, being found in North America as far S as New Jersey and S California. They range north to the southernmost limits of the ice cap. Also known as common seals, hair seals, and leopard seals, they enter rivers, and are even found in the Great Lakes. Small seals, they reach a length of up to 6 ft (180 cm) and a weight of up to 250 lb (110 kg). Their coats are gray with white spots or yellowish with gray or black blotches. Harbor seals are solitary hunters; they feed on fish, mollusks, and crustaceans, coming ashore to rest and sleep. They may gather in large numbers on rocks or beaches, especially at the mating season. They are polygamous and the female produces a single pup in early spring. Small colonies of several families each occupy particular locations in the water, usually near rocky shores or islands, and may remain there for many generations. Their greatest enemies are sharks and killer whales. Harbor seals are classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, subphylum Vertebrata, class Mammalia, order Carnivora, suborder Pinnipedia, family Phocidae.
References in periodicals archive ?
One adult Harbor Seal stranded in California in 1971 had a higher liver Hg concentration (700 mg/kg ww) than reported in the previously listed publications; however, the possibility of sample contamination was cited (Anas 1974).
The resulting estimates provide new insights into harbor seal predation on depressed fish populations and reveal dietary heterogeneity on spatial, demographic, and individual scales.
I utilized keywords relating to Harbor Seal diet in the Northern CCLME, including the terms 'Harbor Seal', 'Pacific Harbor Seal', 'Phoca vitulina richardii', 'foraging', 'fecal analysis', 'dietary', 'ecology', 'predation', 'diet', 'dive or diving', dietdietary composition', 'Washington', 'Oregon' 'Columbia River', 'Salish Sea', 'Northern California Current Large Marine Ecosystem (CCLME)', 'Puget Sound', and 'Pacific Northwest'.
As with other harbor seal studies in glacial fjords in southeastern Alaska, we found peak pup counts in late June (Mathews and Pendleton, 2006, Jansen et al.
Harbor seal haulout sites have been found in the Beardslee Islands in our study area (Mathews and Pendleton, 2006; Womble et al.
6) Another case occurred during a study of experimental infection of harbor seals with A/Seal/Mass/1/80 (H7N7) when an infected seal sneezed into the face and right eye of an investigator.
Moderate attachment of avian influenza A viruses to the trachea and bronchi of harbor seals suggests high susceptibility to and efficient transmission of these viruses.
For the former, harbor seal pups from five sites were compared for circulating TH concentrations and steady-state mRNA expression levels in skin and blubber biopsy samples.
west coast pinnipeds are the California sea lion, Steller sea lion, harbor seal, northern elephant seal, northern fur seal, and Guadalupe fur seal.
The loss of major dorsal circulation in the harbor seal foreflipper is noteworthy because these seals do not regularly haul-out onto iceflows.
Endemic to Baekryeong Island located in the region south of 38 degrees north latitude, those harbor seals have established their habitat on the rocks in front of the island.
Others, such as harbor seals and sea turtles, migrate in and out of our waters with the seasons.