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Movement of Cutthroat Trout, Salmo clarki clarki (Richardson) in Three Oregon Coastal Streams
Author(s) -
Lowry Gerald R.
Publication year - 1965
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1965)94[334:moctsc]2.0.co;2
Subject(s) - trout , streams , tributary , fishery , salmo , fish <actinopterygii> , biology , environmental science , geography , computer network , cartography , computer science
Movement of cutthroat trout in three small coastal streams was studied from October 1959 to December 1963. Upstream migrations of trout occurred from late October until March, with a maximum in December. Kelts returned downstream from December to April with the greatest numbers in January and February. More than 90% of the downstream movement of immatures occurred in February, March, April, and May, with numbers being consistently greatest in April. Two‐year‐old immature fish dominated the run in the two larger streams, while 1‐year‐old immatures did so in the smallest stream. Small tributaries of the study areas were found to be very important to cutthroat trout reproduction. Young trout were noted to leave the tributaries at about 1 year of age. Trout 150 mm in length that had never left the study streams were found in a gravid condition near redd sites.