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Cottus cognatus Richardson, 1836

Slimy sculpin
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Native range | All suitable habitat
This map was computer-generated and has not yet been reviewed.
Cottus cognatus   AquaMaps   Data sources: GBIF OBIS
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Image of Cottus cognatus (Slimy sculpin)
Cottus cognatus
Picture by Scarola, J.F.

Classificação / Names Nomes comuns | Sinônimos | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (peixes com raios nas barbatanas) > Scorpaeniformes (Scorpionfishes and flatheads) > Cottidae (Sculpins)
Etymology: Cottus: Greek, kottos = a fish (Ref. 45335);  cognatus: Named after Mr. Fred Chamberlain, naturalist of the steamer Albatross, who collected the type (Ref. 11366).  More on author: Richardson.

Environment: milieu / climate zone / depth range / distribution range Ecologia

; Água doce; estuarina demersal; intervalo de profundidade 6 - 128 m (Ref. 1998).   Temperate; 4°C - 16°C (Ref. 13614); 71°N - 37°N

Distribuição Países | Áreas da FAO | Ecossistemas | Ocorrências | Point map | Introduções | Faunafri

North America: throughout most of mainland Canada and Alaska; Atlantic Slope drainages south to Potomac River in Virginia, USA; St. Lawrence-Great Lakes basin; upper Mississippi River basin in Wisconsin, Minnesota and Iowa, USA; upper Columbia River drainage in Canada and USA. Also in Siberia, Russia.

Comprimento de primeira maturação / Tamanho / Peso / Idade

Maturity: Lm 7.4  range ? - ? cm
Max length : 12.1 cm TL macho/indeterminado; (Ref. 27547); common length : 7.5 cm TL macho/indeterminado; (Ref. 27547); idade máx. registrada: 7 anos (Ref. 28921)

Descrição suscinta Morfologia | Morfometria

Espinhos dorsais (total): 7 - 10; Raios dorsais (total): 14-19; Espinhos anais 0; Raios anais : 10 - 14; Vértebras: 31 - 35. Distinguished by the two pores on the chin and the short lateral line ending under the second dorsal fin (Ref. 27547). Gill rakers short and stubby, about 6 on first gill arch; lateral line incomplete, ending under middle of soft dorsal fin and usually having a few isolated pores behind this point; main portion with 12 to 26 pores (Ref. 27547). Pectorals large and fan-shaped, tips of lower rays projecting; fourth ray of pelvic much reduced; caudal rounded (Ref. 27547). Rather dark brown or green to dark gray on back and sides, whitish below, with vague, dark mottlings or bars below soft dorsal; belly sometimes with orange tints; soft dorsal, pectoral and caudal fins usually barred, pelvic fins and anal usually immaculate but sometimes barred; spiny dorsal dark at base, with a clear margin that may turn orange in breeding males; breeding males usually dark, sometimes black, all over (Ref. 27547).

Biologia     Glossário (p.ex. epibenthic)

Inhabits rocky riffles of cold streams, rocky areas of lakes (commonly at 90-106 m depth), springs and their effluents (Ref. 5723). Moves into shallow water to spawn (Ref. 27547). In some areas, they are common in brackish water (Ref. 27843), presumably moving to and from fresh water, at least for spawning (Ref. 27547). Feeds mostly on aquatic insect larvae and nymphs but also on crustaceans, small fishes, and plant materials (Ref. 1998). May be used as bait, but this seems rare (Ref. 27547).

Ciclo de vida ou comportamento de acasalamento Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas

The male chooses a nesting site under a rock or ledge. Spawning males are territorial toward other males (Ref. 27547). He attracts a female into the nesting site and after more courting the female deposits her adhesive eggs. The female is then driven out and the male guards the eggs until hatching occurs. The nest usually contains eggs from several females (Ref. 27547). The male has also been observed to guard the young (Ref. 1998).

Referência principal Upload your references | Referências | Coordenador | Colaboradores

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 na Lista Vermelha da UICN (Ref. 119314)

  Segura ou pouco preocupante (LC) ; Date assessed: 09 November 2011

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Ameaça para os humanos

  Harmless





Uso pelos humanos

Pescarias: sem interesse; Aquário: Aquários públicos
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Estimativas de algumas propriedades baseadas em modelos

Índice de diversidade filogenética (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00759 (0.00334 - 0.01725), b=3.11 (2.92 - 3.30), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Nível Trófico (Ref. 69278):  3.4   ±0.47 se; Based on food items.
Resiliência (Ref. 69278):  médio(a), tempo mínimo de duplicação da população 1,4 - 4,4 anos (tm=2-4; tmax=7; Fec=42-1,420).
Vulnerabilidade (Ref. 59153):  Moderate to high vulnerability (50 of 100) .