Comparison of sleds versus plankton nets for sampling fish larvae and eggs

Fish larvae and fish eggs were sampled from the inshore waters of eastern Lake Michigan from 1978 through 1980, using a benthic sled and a plankton net towed within 0.5 m of the lake bottom. Differences between estimates of ichthyoplankton abundance based on the benthic sled and those based on the p...

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Bibliographic Details
Published in:Hydrobiologia
Main Authors: Madenjian, C. P., Jude, David J.
Other Authors: Great Lakes Research Division, University of Michigan, 48109, Ann Arbor, MI, U.S.A., Ann Arbor
Format: Article in Journal/Newspaper
Language:English
Published: Kluwer Academic Publishers; Springer Science+Business Media 1985
Subjects:
Life Sciences
Ecology
Hydrobiology
Fish Larvae
Sampling Devices
Great Lakes
Gear Efficiency
Ecology and Evolutionary Biology
Natural Resources and Environment
Science
Cottus cognatus
Slimy sculpin
Online Access:https://hdl.handle.net/2027.42/42869
https://doi.org/10.1007/BF00015245
Description
Summary:Fish larvae and fish eggs were sampled from the inshore waters of eastern Lake Michigan from 1978 through 1980, using a benthic sled and a plankton net towed within 0.5 m of the lake bottom. Differences between estimates of ichthyoplankton abundance based on the benthic sled and those based on the plankton net towed near bottom were examined along with interactions between gear, bottom depth, and time of day. Time of day was determined to be an important factor in comparing these two gear, but data were inconclusive as to the effect of depth on gear differences. Abundance of fish eggs calculated using sled tow data was significantly higher than that for the plankton net. For nighttime collections, density of alewife Alosa pseudoharengus larvae sampled in the plankton net significantly exceeded that for the sled, whereas density of spottail shiner Notropis hudsonius larvae based on sled data was significantly higher than that based on the plankton net for day sampling. Overall, the plankton net appeared to be adequate for sampling abundance of alewife larvae, while the sled was preferred for sampling fish eggs, spottail shiner larvae, and the following less common, but apparently demersal larvae: trout-perch Percopsis omiscomaycus , johnny darter Etheostoma nigrum , ninespine stickleback Pungitius pungitius , and slimy sculpin Cottus cognatus . Peer Reviewed http://deepblue.lib.umich.edu/bitstream/2027.42/42869/1/10750_2004_Article_BF00015245.pdf

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