Yearly Movements of Shortnose Sturgeons in the Connecticut River
1985; Wiley; Volume: 114; Issue: 6 Linguagem: Inglês
10.1577/1548-8659(1985)114 2.0.co;2
ISSN1548-8659
Autores Tópico(s)Water Quality and Resources Studies
ResumoMovements of shortnose sturgeon Acipenser brevirostrum, an endangered species, were studied for 5 years by radio telemetry and mark-recapture in the lower 140 km of the Connecticut River to Long Island Sound. Ninety fish (range, 54–97 cm fork length; 1.2–9.2 kg weight) were equipped with radio transmitters. The cycle of annual movement consisted of several up- and downriver migrations between four discrete areas that were used for summer feeding, spawning, and over-wintering. Thus, the major portion of the river served as a conduit for movement between the areas of major use. Each year, some adults remained in fresh water. Yearly movements were complex; fish of different age classes and reproductive conditions associated seasonally in the same habitat. Received February 13, 1984 Accepted May 6, 1985
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