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Duration and drift of larval lake sturgeon in the Sturgeon River, Michigan

Duration and drift of larval lake sturgeon in the Sturgeon River, Michigan By N. A. Auer1 and E. A. Baker2 1 Michigan Technological University, Houghton, MI, USA; 2Michigan Department of Natural Resources, Marquette Fisheries Station, Marquette, MI, USA Summary Recovery of lake sturgeon populations in the Great Lakes basin is now a focus of binational, federal, provincial, state and tribal management agencies; however, efforts to restore and rehabilitate stocks will be ineffective until early life history strategies are understood. Defining the extent and duration of larval drift will help to protect and re-establish populations of lake sturgeon, Acipenser fulvescens. The stages of early-life, from egg to about 250 mm total length (TL), are believed to be the most vulnerable to factors affecting survival. Drift of larvae was monitored during 8 of the 9 years between 1992 and 2000 using drift nets set 14, 26, 35, 45 and 61 km below the spawning site on the Sturgeon River, Michigan. Natural river water levels varied between years and influenced drift sampling and success of spawning and hatch. Between 1992 and 2000, total annual catch of drifting larval lake sturgeon varied from three to 423 individuals, with 978 larvae collected over the 8 years. Larvae drifted as a ÔplugÕ and became more dilute http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Ichthyology Wiley

Duration and drift of larval lake sturgeon in the Sturgeon River, Michigan

Auer, N. A.; Baker, E. A.
Journal of Applied Ichthyology , Volume 18 (4‐6) – Dec 1, 2002
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References (12)

Publisher
Wiley
Copyright
Copyright © 2002 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0175-8659
eISSN
1439-0426
DOI
10.1046/j.1439-0426.2002.00393.x
Publisher site
See Article on Publisher Site

Abstract

By N. A. Auer1 and E. A. Baker2 1 Michigan Technological University, Houghton, MI, USA; 2Michigan Department of Natural Resources, Marquette Fisheries Station, Marquette, MI, USA Summary Recovery of lake sturgeon populations in the Great Lakes basin is now a focus of binational, federal, provincial, state and tribal management agencies; however, efforts to restore and rehabilitate stocks will be ineffective until early life history strategies are understood. Defining the extent and duration of larval drift will help to protect and re-establish populations of lake sturgeon, Acipenser fulvescens. The stages of early-life, from egg to about 250 mm total length (TL), are believed to be the most vulnerable to factors affecting survival. Drift of larvae was monitored during 8 of the 9 years between 1992 and 2000 using drift nets set 14, 26, 35, 45 and 61 km below the spawning site on the Sturgeon River, Michigan. Natural river water levels varied between years and influenced drift sampling and success of spawning and hatch. Between 1992 and 2000, total annual catch of drifting larval lake sturgeon varied from three to 423 individuals, with 978 larvae collected over the 8 years. Larvae drifted as a ÔplugÕ and became more dilute

Journal

Journal of Applied Ichthyology – Wiley

Published: Dec 1, 2002

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