<i>In situ</i> growth of juvenile zebra mussels in a regulated stream

French, John R. P., III; Nichols, S. Jerrine; Craig, Jaquelyn M.; Allen, Jeffery D.; Black, M. Glen

Abstract:

We investigated the in situ growth of juvenile zebra mussels (Dreissena polymorpha) in a reach of the Huron River (southeast Michigan) below a dam with a control gate that regulates water levels. Growth was significantly different among sample dates over a five-month-long monitoring season. Mean growth of mussels generally decreased from 0.093 mm/day just above the dam to 0.067 mm/day 4 km downstream, then increased to 0.091 mm/day at end of the 17-km-long study area. Significant differences among sites were most numerous in August during a severe drought when discharges fell substantially. Growth was positively correlated with discharges (R² = 0.94, p < 0.01). The positive correlation between growth and chlorophyll a levels in the study area, however, was weak (R² = 0.69, p < 0.1). Our study suggests that discharge may be one controlling factor for dreissenid populations in small streams.

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Article

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70006534

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French, John R. P., III; Nichols, S. Jerrine; Craig, Jaquelyn M.; Allen, Jeffery D.; Black, M. Glen

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Great Lakes Science Center

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English

Citation Larger Work Title:

Journal of Freshwater Ecology

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6 p.

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Abstract has subscript/superscript to be fixed

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Taylor and Francis

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In situ growth of juvenile zebra mussels in a regulated stream; 2006; Article; Journal; Journal of Freshwater Ecology; French, John R. P., III; Nichols, S. Jerrine; Craig, Jaquelyn M.; Allen, Jeffery D.; Black, M. Glen