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Sebastes ciliatus, the dusky rockfish, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae.It is typically found in the North Pacific Ocean, specifically in the Bering Sea near British Columbia, in the Gulf of Alaska, and in the depths of the Aleutian Islands.
Genetic analysis has found three distinct populations of yelloweye rockfish: the outside coastal population off the coast of Alaska, British Columbia, and the West Coast of the United States; an inside population in the Salish Sea, including the San Juan Islands, Strait of Georgia, and Puget Sound; and third stock in Hood Canal. [9]
The black rockfish is found in the northeastern Pacific Ocean from Amchitka Island in the Aleutian Islands of Alaska to Santa Monica Bay in California. [6] There have been two records of this species from the Iwate Prefecture of northern Japan. [4]
Pacific ocean perch is a very slow-growing species, with a low rate of natural mortality (estimated at 0.06), a relatively old age at 50% maturity (10.5 years for females in the Gulf of Alaska), and a very old maximum age of 98 years in Alaska (84 years maximum age in the Gulf of Alaska). [25]
It attains lengths greater than one metre (>39 inches) and weighs up to 20 kg (44 pounds). In the Gulf of Alaska, shortraker rockfish are sampled annually during longline surveys and are most abundant between depths of 300–400 metres (980–1,310 ft). [7] It is a bathydemersal species found over soft substrates. [4]
Like other rockfish species, quillbacks live on the bottom, perching on rocks or hiding in rock crevices. [7] The juveniles stay mainly along the shore, in reefs, sand and eelgrass, while the adult rockfish live in the deeper waters. They are for the most part solitary dwellers, rarely being found in groups.
Similar fish surveys conducted this summer in the Patapsco, Magothy, Rhode, West, Miles and Tred Avon rivers, also found fewer rockfish. Biologists captured more than 56,000 fish of 56 different ...
Sebastes rockfish are found in the temperate North and South Pacific and Atlantic Oceans. [12] Rockfish range from the intertidal zone to almost 3,000 m (9,800 ft) deep, usually living benthically on various substrates, often, as the name suggests, around rock outcrops.