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Summary for Cottus asper Larvae
Prickly sculpin

Cottus  asper  Richardson, 1836
Family:	Cottidae (Sculpins)
Order:	Scorpaeniformes
Class:	Actinopterygii (ray-finned fishes)
English name:	Prickly sculpin
Distribution:	North America: Pacific slope drainages from Seward, Alaska to Ventura River, California, USA; also east of Continental Divide in upper Peace River in British Columbia, Canada. Exhibits coastal and inland forms that are genetically distinct (Ref. 27547).
Adult biology:	There appears to be two genetically distinct forms (Ref. 27547), an inland form found in sandy and rocky shores of lakes, and a coastal form usually found over sand in quiet runs of small to medium rivers; sometimes in salt water near river mouths (Ref. 2850). The coastal form moves into brackish estuaries to spawn (Ref. 27547). Oviparous with demersal, adhesive eggs and pelagic larvae (Ref. 265). Feed mainly on aquatic insect larvae and bottom invertebrates (Ref. 1998). Too small to be used as food and too difficult to capture in large numbers to be used for anything else (Ref. 27547) but large individuals are reported to be excellent eating as well as good bait fishes (Ref. 2850).
Diagnosis:	Gut shape unique, posteriorly forked (Ref. 265) Pigmentation: dorsal and ventral gut surface; postanal ventral midline series decreasing in number and becoming more evenly spaced with development (Ref. 265). Sequence of fin development: pectorals and pelvics by 10 mm S (Ref. 265). See also LARVAE table.
Climate Zone:	temperate; 60°N - 32°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.