Density-dependent recruitment of the bloater (Coregonus hoyi) in Lake Michigan
Polskie Archiwum Hydrobiologii
By: Edward H. Brown Jr. and Gary W. Eck
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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.
Suggested Citation
Brown, E.H., Eck, G.W., 1992, Density-dependent recruitment of the bloater (Coregonus hoyi) in Lake Michigan: Polskie Archiwum Hydrobiologii, v. 39, no. 3-4, p. 289-297.
| 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 |
| Larger Work Title | Polskie Archiwum Hydrobiologii |
| First page | 289 |
| Last page | 297 |