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Summary for Dallia pectoralis Larvae
Alaska blackfish

Dallia  pectoralis  Bean, 1880
Family:	Umbridae (Mudminnows)			( not available )
Order:	Esociformes
Class:	Actinopterygii (ray-finned fishes)
English name:	Alaska blackfish
Distribution:	North America: Alaska from Colville River delta south to central Alaska Peninsula near Chignik; upstream in Yukon-Tanana drainage to near Fairbanks. Also Bering Sea islands and northeastern Siberia, Russia.
Adult biology:	Usually found in heavily vegetated swamps and ponds; occasionally in medium to large rivers and lakes with abundant vegetation (Ref. 5723). Migrations appear to be limited to inshore or upstream movements to spawning grounds in the spring and (presumably) reverse migrations to deeper water in the fall (Ref. 27547). Oviparous, batch spawner (Ref. 205). Known for their tolerance to cold water: survives exposures to -20°C for up to 40 minutes, and can survive for a few days after complete freezing of parts of the body, even the head (Ref. 28673, 28674). Uses its esophagus as auxiliary breathing organ (Ref. 27797).
Diagnosis:	After 10 days, young measures 9 mm long and the yolk sac have been absorbed. At 22 days, it measures 12 mm and showing adult characteristics. See also LARVAE table.
Climate Zone:	boreal; 4 - 14°C; 72°N - 55°N
Main Ref:	Morrow, J.E.. 1980. (Ref. 27547)
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Internet sources:	CISTI | Google | GoogleImages | GOBASE | GenBank | PubMed | Scirus | Zoological Record Note: use the Back button of your browser to return to LarvalBase.
	Modified: Luna, Susan M.	Entered: Garilao, Cristina V.

	Ref.:				Glossary
		(e.g. 9948)				(e.g. urostyle)

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Page created by Eli 09.11.99, last modified by Eli 04.03.05.