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Walleye consumption and long-term population trends following gizzard shad introduction into a Western South Dakota reservoir

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Walleye consumption and long-term population trends following gizzard shad introduction into a Western South Dakota reservoir; 2007; Article; Journal; Journal of Freshwater Ecology; Ward, M. J.; Willis, D. W.; Miller, B. H.; Chipps, S. R.

Summary

The gizzard shad (Dorosoma cepedianum) was introduced into 1,955-ha Angostura Reservoir, South Dakota to provide increased prey resources for walleye (Sander vitreus). Linear correlation analysis indicated that following gizzard shad introduction, walleye catch-per-unit-effort and mean length at age have increased over time (r = 0.68 to 0.85, P = 0.02 to 0.001). Walleye stomach contents were collected monthly from April through September, 2004 to determine the extent to which age-0 gizzard shad were being utilized as prey during the growing season. Age-0 gizzard shad were absent from walleye diets from April to mid-July (pre-shad-available period); however, from mid-July through early September (shad-available period), age-0 gizzard [...]

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local-index unknown 70029748
local-pk unknown 70029748
series unknown Journal of Freshwater Ecology

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citationTypeArticle
journalJournal of Freshwater Ecology
languageEnglish
parts
typevolume
value22
typeissue
value2

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