Production and Food of Cutthroat Trout in Three Oregon Coastal Streams
- 1 October 1966
- journal article
- research article
- Published by JSTOR in The Journal of Wildlife Management
- Vol. 30 (4) , 754-+
- https://doi.org/10.2307/3798282
Abstract
Unfished populations of coastal cutthroat trout (Salmo clarki clarki) in 3 small coastal streams in Oregon were studied from April, 1962, until Nov., 1963. Population size, growth rate, and production were estimated for study areas in each stream. The mean annual biomass of cutthroat trout for all streams was 4.2 grams per square meter (g/m2). Growth in length was greatest in April and May and least in Oct. and Nov. Production per year averaged 4.1 g/m2 for the 3 streams, but production levels were about 20% higher in one of the three. Food samples from trout stomachs taken during the period of emergence and early growth of coho salmon (Oncorhynchus kisutch) fry suggested that cutthroat trout were not important consumers of young coho. Aquatic arthropods were consistently an important part of the diet; earthworms decreased in importance and terrestrial arthropods increased in importance during the period Feb. -June.This publication has 4 references indexed in Scilit:
- Movement of Cutthroat Trout, Salmo clarki clarki (Richardson) in Three Oregon Coastal StreamsTransactions of the American Fisheries Society, 1965
- Net Production of Juvenile Coho Salmon in Three Oregon StreamsTransactions of the American Fisheries Society, 1965
- Aggressive Behavior in Juvenile Coho Salmon as a Cause of EmigrationJournal of the Fisheries Research Board of Canada, 1962
- Production and Food Utilization in a Population of Bluegill SunfishEcological Monographs, 1962