The widow rockfish (Sebastes entomelas), or brown bomber, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. It is found in the northeastern Pacific Ocean.
The widow rockfish was first formally described as Sebastichthys entomelas in 1880 by the American ichthyologists David Starr Jordan and Charles Henry Gilbert with the type locality given as deepwater outside of Monterey Bay, California.[2] Some authorities place this species in the subgenus Acutomentum. The specific name entomelas is a compound of entos meaning “within” and melas which means “black” an allusion to the “jet-black” peritoneum of this species.[3]
The widow rockfish has an elongate and compressed, scale covered body which has a depth which is around one third of its standard length.[4] The head is relatively short, and the upper profile is slightly curved. The mouth is relatively small, the lower jaw projects slightly. The color is brassy brown over most of the body with the belly generally lighter in color, often with a reddish cast. The fin membranes, especially those in the anal and pectoral fins, are black. Specimens smaller than 10 inches (250 mm) are lighter in color and are tinged with vague streaks of orange.[5] There are weak spines on the head and there are 13 spined and 14-16 soft rays in the dorsal fin while the anal fin has 3 spines and 8-10 soft rays. This species attains a maximum total length of 60 cm (24 in).[1]
The widow rockfish occurs from Todos Santos Bay, Baja California, to Albatross Bank, in the Gulf of Alaska.[1] Adult widow rockfishes are most abundant from British Columbia to northern California.[6] This is a pelagic-neritic fish which is found at depths between 0 and 549 m (0 and 1,801 ft).[1]
Widow rockfish feed on krill and copepods as juveniles while the adults feed on juvenile crabs, amphipods, krill, and small fishes. The juveniles are preyed upon by Chinook salmon (Oncorhynchus tshawytscha) and northern fur seals (Callorhinus ursinus). A few mature when 12 inches (300 mm) long and 3 years old. Fifty percent are mature when 12.75 inches (324 mm) long or 4 years old. Widow rockfish may live to be 16 years old.[6] As with other rockfish fertilization is internal and the young are born live. The number of developing eggs increases from 95,000 in fish 12.75 inches (324 mm) long, to about 1,100,000 in a fish 20 inches (510 mm) long.[4]
A potential PCR-RFLP genetic sex marker developed for gopher rockfish[7] does not successfully distinguish male and female widow rockfish.[8]
Widow rockfish fisheries are managed by NOAA Fisheries and the Pacific Fishery Management Council under the Pacific Coast Groundfish Fishery Management Plan. This allows for the issue of permits which limit entry to the fishery. There are limits to how much can be landed from each trip and there are closed seasons and areas closed to fisheries. It restricts the type of fishing gear which can be used to reduce bycatch and habitat destruction. It also provides for a trawl rationalization catch share program which sets catch limits based on the population status of each species and a share of that limit is allocated to each fisherman, this can be shared with other fishermen. The Widow rockfish is managed as part of the other rockfish complex in the Gulf of Alaska, although this species is not specifically targeted in Alaskan waters and only small amounts are landed as bycatch.[6]
The widow rockfish (Sebastes entomelas), or brown bomber, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. It is found in the northeastern Pacific Ocean.
Sebastes entomelas Sebastes generoko animalia da. Arrainen barruko Sebastidae familian sailkatzen da.
Sebastes entomelas Sebastes generoko animalia da. Arrainen barruko Sebastidae familian sailkatzen da.
De weduweroodbaars (Sebastes entomelas) is een straalvinnige vis uit het geslacht Sebastes en behoort daarom tot de orde schorpioenvisachtigen (Scorpaeniformes), die voorkomt in het noordoosten en het oosten van de Grote Oceaan.
Sebastes entomelas kan een lengte bereiken van 60 cm en kan maximaal 60 jaar oud worden. De vis heeft één rugvin met 13 stekels en 14-16 vinstralen en één aarsvin met drie stekels en 8 vinstralen.
Sebastes entomelas is een zoutwatervis die voorkomt in een gematigd klimaat. De diepte waarop de soort voorkomt is maximaal 550 m onder het wateroppervlak. De vis voedt zich met hoofdzakelijk uit dierlijk voedsel.
Sebastes entomelas is voor de beroepsvisserij en voor de hengelsport van belang. De soort wordt tevens gevangen voor commerciële aquaria.
De soort komt niet voor op de Rode Lijst van de IUCN.
De weduweroodbaars (Sebastes entomelas) is een straalvinnige vis uit het geslacht Sebastes en behoort daarom tot de orde schorpioenvisachtigen (Scorpaeniformes), die voorkomt in het noordoosten en het oosten van de Grote Oceaan.
寡平鮋，為輻鰭魚綱鮋形目鮋亞目平鮋科的其中一種，為溫帶海水魚，分布於東北太平洋阿拉斯加至墨西哥下加利福尼亞Todos Santos灣海域，棲息深度0-549公尺，體長可達60公分，棲息在礁石區底層水域，卵胎生，幼魚常出現在淺水域，成群活動，以甲殼類及魚類為食，生活習性不明，可做為食用魚、遊釣魚及觀賞魚。
这是一篇鮋形目小作品。你可以通过编辑或修订扩充其内容。 寡平鮋，為輻鰭魚綱鮋形目鮋亞目平鮋科的其中一種，為溫帶海水魚，分布於東北太平洋阿拉斯加至墨西哥下加利福尼亞Todos Santos灣海域，棲息深度0-549公尺，體長可達60公分，棲息在礁石區底層水域，卵胎生，幼魚常出現在淺水域，成群活動，以甲殼類及魚類為食，生活習性不明，可做為食用魚、遊釣魚及觀賞魚。
