Cottus aleuticus, Coastrange sculpin

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Cottus aleuticus Gilbert, 1896

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

Classificatie / Names Lokale namen | Synoniemen | Catalog of Fishes(Genus, Soort(en)) | ITIS | CoL | WoRMS | Cloffa

> 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 Ecologie

marien; zoet water; brak water demersaal; katadroom (Ref. 51243). Temperate; 68°N - 35°N, 175°W - 120°W

Verspreiding Landen | FAO regio's | Ecosystemen | Voorkomen | Point map | Introducties | Faunafri

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).

Grootte / Gewicht / Leeftijd

Maturity: Lm ?  range ? - ? cm
Max length : 17.0 cm TL mannelijk / geslacht onbekend; (Ref. 5723); common length : 6.0 cm TL mannelijk / geslacht onbekend; (Ref. 12193); max. gerapporteerde leeftijd: 8 Jaren (Ref. 27547)

Korte beschrijving Morfologie | Morfometrie

Dorsale stekels (totaal): 8 - 10; Dorsale zachte stralen (totaal): 17-20; Anale stekels 0; Anale zachte stralen: 12 - 15; Wervels: 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).

Biologie     Verklarende woordenlijst (bv. 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).

Levenscyclus en paargedrag Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven

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).

Hoofdreferentie Upload your references | Referenties | Coördinator | Medewerkers

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)

Status op de Rode Lijst van het IUCN (Ref. 130435)

  Niet bedreigd (LC) ; Date assessed: 08 November 2011

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless





Gebruik door de mens

Visserij: van geen belang
FAO - Publication: search | FishSource |

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Estimates based on models

Fylogenetische diversiteitsindex (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).
Trofisch niveau (Ref. 69278):  3.2   ±0.3 se; based on diet studies.
Weerstandsvermogen (Ref. 120179):  Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (tm=3; tmax=8; Fec=100).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).