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Cottus aleuticus Gilbert, 1896

Coastrange sculpin
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Image of Cottus aleuticus (Coastrange sculpin)
Cottus aleuticus
Picture by Canadian Museum of Nature, Ottawa, Canada

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> Perciformes/Cottoidei (Sculpins) > Cottidae (Sculpins)
Etymology: Cottus: Greek, kottos = a fish (Ref. 45335);  aleuticus: aleuticus meaning of the Aleutians (Ref. 1998).
More on author: Gilbert.

Environment: milieu / climate zone / depth range / distribution range 生態学

海; 新鮮な水; 汽水性の 底生の; 降流性の (Ref. 51243). Temperate; 68°N - 35°N, 175°W - 120°W

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North America: Bristol Bay and Aleutian Islands, Alaska to northern California, USA. Isolated populations in lower Kobuk River (Alaska), Cultus Lake (British Columbia, Canada), and Lake Washington (USA) (Ref. 27547).

サイズ / 重さ / 年齢

Maturity: Lm ?  range ? - ? cm
Max length : 17.0 cm TL オス/雌雄の選別がない; (Ref. 5723); common length : 6.0 cm TL オス/雌雄の選別がない; (Ref. 12193); 最大記録サイズ: 8 年 (Ref. 27547)

簡単な記述 検索表 | 形態学 | 形態計測学

背面の脊椎 (合計) : 8 - 10; 背鰭 (合計) : 17 - 20; 肛門の骨: 0; 臀鰭: 12 - 15; 脊つい: 34 - 38. Distinguished by having only a single pore on the tip of the chin, no palatine teeth and no pronounced gap between 1st and 2nd dorsal fins (Ref. 27547). Dark brown to greenish or grayish on back and sides, with darker blotches; sides lighter, ventral areas white; usually two or three dark saddle-like blotches below soft part of dorsal fin; dark bars on dorsal, anal, pectoral and caudal fins; orange edge on spiny dorsal fin of spawning males (Ref. 27547).

生物学     用語集 (例 epibenthic)

Inhabits gravel and rubble riffles of medium to large rivers and rocky shores of lakes (Ref. 5723). Occasionally enters estuaries (Ref. 5723) and nearshore coastal water (Ref. 43939). Feeds mostly at night and mostly on aquatic insects and benthic invertebrates (Ref. 27547). Generally solitary but large aggregations have been noted (Ref. 27547). Makes regular seasonal migrations associated with spawning (Ref. 27547). Considered a forage fish for some salmonids (Ref. 1998).

Life cycle and mating behavior Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 幼生

Adults make regular seasonal migrations associated with spawning. They move downstream to estuaries or at least to lower reaches of rivers in the spring, mostly at night (Ref. 27547). Eggs are deposited on the undersurface of a rock, in adhesive masses (Ref. 1998). Over 7,000 eggs have been found in a single nest, suggesting that a male may spawn with several females (Ref. 1998, 27547). The male guards the nest until all eggs have hatched (Ref. 1998, 27547). A reverse, upstream migration of yearlings and adults occur in late summer to early winter, from August to December (Ref. 27547).

主な参考文献 Upload your references | 参考文献 | コーディネーター | 協力者

Page, L.M. and B.M. Burr, 1991. A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p. (Ref. 5723)

IUCNのレッドリストの状況は (Ref. 130435)

  軽度懸念 (LC) ; Date assessed: 08 November 2011

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

  Harmless





Human uses

水産業: 興味がない
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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00676 (0.00300 - 0.01523), b=3.17 (2.98 - 3.36), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
栄養段階 (Ref. 69278):  3.2   ±0.3 se; based on diet studies.
回復力 (Ref. 120179):  手段, １．４年～４．４年の倍増期間の最小個体群 (tm=3; tmax=8; Fec=100).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).