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Density-dependent recruitment of the bloater (Coregonus hoyi) in Lake Michigan

Polskie Archiwum Hydrobiologii

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Abstract

Density-dependent recruitment of the bloater (Coregonus hoyi) in Lake Michigan during and after recovery of the population in about 1977-1983 was best reflected in the fit of the Beverton-Holt recruitment function to age -1 and -2 recruits and estimated eggs of parents surveyed with trawls. A lower growth rate and lower lipid content of bloaters at higher population densities and no evidence of cannibalism supported the conclusion that recruitment is resource limited when alewife (Alosa pseudoharengus) abundance is low. Predation on larvae by alewives was indicated in earlier studies as the probable cause of depressed recruitment of bloaters before their recovery, which coincided with declining alewife abundance. This negative interaction masked any bloater stock-recruitment relation in the earlier period.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Density-dependent recruitment of the bloater (Coregonus hoyi) in Lake Michigan
Series title:
Polskie Archiwum Hydrobiologii
Volume
39
Issue:
3-4
Year Published:
1992
Language:
English
Contributing office(s):
Great Lakes Science Center
Description:
p. 289-297
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
289
Last page:
297
Number of Pages:
8