Effect of brief navigation-related dewaterings on fish eggs and larvae

L. E. Holland

doi:10.1577/1548-8659(1987)7<145:eobndo>2.0.co;2

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Effect of brief navigation-related dewaterings on fish eggs and larvae

L. E. Holland

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Abstract

Short-term dewatering of nearshore spawning areas often occurs during passage of commercial tows in the upper Mississippi River as well as in other navigated river systems. This phenomenon was examined experimentally to identify potential effects on survival of fish eggs and larvae. Early life stages of walleyes ( Stizostedion vitreum vitreum ) and northern pike ( Esox lucius ) were dewatered 2 min in laboratory studies at intervals of either 1, 3, 6, or 12 h from just after fertilization to 10-14 d posthatch. Dewatering did not cause mortality of eggs, but significant mortality of larvae of both species occurred at dewatering frequencies of 1 or 3 h. Therefore, significant mortality first was observed at a frequency equivalent to a mean passage of eight tows per day.

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North American Journal of Fisheries Management Article

Source-reported bounding extent: 39.70136080621157° to 44.88683601433823° latitude; -92.94805677526463° to -90.58084070349742° longitude. This indicates report coverage, not an exact sampling location. View area on OpenStreetMap.

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L. E. Holland. 1987. Effect of brief navigation-related dewaterings on fish eggs and larvae. https://doi.org/10.1577/1548-8659(1987)7%3C145%3Aeobndo%3E2.0.co%3B2

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