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Seasonal Growth and Diets of Young‐of‐the‐Year Mooneye (Hiodon tergisus) from the Assiniboine River, Manitoba
Author(s) -
Glenn C. L.
Publication year - 1978
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(1978)107<587:sgadoy>2.0.co;2
Subject(s) - nymph , zoology , biology , fish <actinopterygii> , ecology , fishery
Most young‐of‐the‐year mooneye in the Assiniboine River attained total lengths and weights greater than 130 mm and 24 g during the 5‐mo growing season in 1976. More than 90% of the total annual growth was completed by August 31. No increase in length occurred after October and mean body weights decreased during winter. Scales developed on young mooneye by the time they were 44 mm long. Immature caddis flies, mayflies, and midges formed the bulk of the diets in June when the fish were less than 65 mm in length. By mid‐July corixids became an important food source. Some nymph stoneflies were eaten during winter months.