Entorno: milieu / zona climática / rango de profundidad / gama de distribución
Ecología
marino; agua dulce; salobre demersal; catadromo (Ref. 138280). Temperate; 68°N - 35°N, 175°W - 120°W
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).
Tamaño / Peso / Edad
Madurez: Lm ?  range ? - ? cm
Max length : 17.0 cm TL macho / no sexado; (Ref. 5723); common length : 6.0 cm TL macho / no sexado; (Ref. 12193); edad máxima reportada: 8 años (Ref. 27547)
Espinas dorsales (total) : 8 - 10; Radios blandos dorsales (total) : 17 - 20; Espinas anales: 0; Radios blandos anales: 12 - 15; Vértebra: 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).
Body shape (shape guide): elongated.
Adults inhabit gravel and rubble riffles of medium to large rivers and rocky shores of lakes (Ref. 5723). They occasionally enter estuaries (Ref. 5723) and nearshore coastal water (Ref. 43939). They feed mostly at night and mostly on aquatic insects and benthic invertebrates (Ref. 27547). Generally solitary but large aggregations have been noted (Ref. 27547). Adults make regular seasonal migrations associated with spawning (Ref. 27547). Considered a forage fish for some salmonids (Ref. 1998).
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).
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)
Situación en la Lista Roja de la UICN (Ref. 130435: Version 2025-2 (Global))
Amenaza para el ser humano
Harmless
Usos humanos
Pesquerías: sin interés
Herramientas
Informes especiales
Descargar XML
Fuentes de Internet
Estimaciones basadas en modelos
Índice de diversidad filogenética (Referencia 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00832 (0.00340 - 0.02033), b=3.16 (2.98 - 3.34), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245). |
Nivel trófico (Referencia 69278) |
3.2 ±0.3 se; based on diet studies. |
Resiliencia (Referencia 120179) |
Medio, población duplicada en un tiempo mínimo de 1.4-4.4 años (tm=3; tmax=8; Fec=100). |
Vulnerabilidad pesquera (Ref. 59153) |
Low to moderate vulnerability (34 of 100). 🛈 |