Relationships among condition indices, feeding and growth of walleye in Lake Erie
Fisheries Management and Ecology
By: K.J. Hartman and F.J. Margraf
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Abstract
Condition indices are often used as surrogates of fish health, growth, and feeding and to compare ecological well-being among fish populations. In an effort to identify easily measured indices, growth and food consumption were compared with gonadal-somatic index, liver-somatic index (LSI), fat-somatic index and relative weight (Wr) for ages 1-3 walleye, Sander vitreus (Mitchill), in Lake Erie from 1986 to 1988. The LSI and Wr were significantly correlated with growth rate or food consumption, but correlations were too small to be considered biologically meaningful. Furthermore, no consistent relationships between condition indices and growth or consumption were found among combinations of fish age and season. None of the indices are considered reliable surrogates for more laborious estimates of growth and food consumption for Lake Erie walleye. Significant relationships between Wr and relative abundance of key prey species warrant further investigation. ?? 2006 Blackwell Publishing Ltd.
Suggested Citation
Hartman, K., and Margraf, F., 2006, Relationships among condition indices, feeding and growth of walleye in Lake Erie: Fisheries Management and Ecology, v. 13, no. 2, p. 121-130, https://doi.org/10.1111/j.1365-2400.2006.00486.x.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Relationships among condition indices, feeding and growth of walleye in Lake Erie |
| Series title | Fisheries Management and Ecology |
| DOI | 10.1111/j.1365-2400.2006.00486.x |
| Volume | 13 |
| Issue | 2 |
| Publication Date | March 10, 2006 |
| Year Published | 2006 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Fisheries Management and Ecology |
| First page | 121 |
| Last page | 130 |