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Movements of Adult Colorado Squawfish during the Spawning Season in the Upper Colorado River
Author(s) -
McAda Charles W.,
Kaeding Lynn R.
Publication year - 1991
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(1991)120<0339:moacsd>2.3.co;2
Subject(s) - fish <actinopterygii> , habitat , fishery , drainage basin , hydrology (agriculture) , environmental science , geography , ecology , biology , geology , cartography , geotechnical engineering
Colorado squawfish Ptychocheilus lucius spawned in widely separated areas throughout the 350‐km section of the upper Colorado River upstream from Lake Powell, Utah, as evidenced by the movement of radio‐tagged adults during the spawning season and the later capture of larvae. With one exception, tagged fish remained separated from each other during the spawning season. Distances moved by tagged fish were not related to fish size or location of initial capture along the river. Movements were generally shorter (mean, 23.2 km) than those reported for this species in the Green River basin, in part because of important habitat differences between the two rivers. Most tagged Colorado River fish were found near their initial point of capture after the spawning season.