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Performance of Walleye Progeny from Missouri River Tributaries in South Dakota
Author(s) -
Mauk Robert J.,
Brown Michael L.
Publication year - 2001
Publication title -
north american journal of aquaculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.432
H-Index - 41
eISSN - 1548-8454
pISSN - 1522-2055
DOI - 10.1577/1548-8454(2001)063<0167:powpfm>2.0.co;2
Subject(s) - tributary , biology , fishery , geography , cartography
Genetic evaluation of three runs of walleyes Stizostedion vitreum from the Grand, Moreau, and Cheyenne rivers, South Dakota, previously indicated that the groups were genetically similar. However, certain morphometric traits were determined to be significantly different. Consequently, we conducted performance evaluations to determine if any group was better suited for culturing. In April 1995 and 1996, eggs from walleye broodstock were collected at each of the three tributaries and transported to a hatchery. Grand River walleyes produced the highest percent hatch (67.3% in 1995 and 1996), compared with Cheyenne River (56.8% in 1995, 44.0% in 1996) and Moreau River (43.4% in 1995, 50.4% in 1996) walleyes. Fry were extensively reared on natural foods for about a month. Fingerlings were harvested in June, and subgroups were stocked into replicate aquaria connected to a water‐recirculating system. All groups converted to pelleted food by 11 d postharvest in both years. Survival at 31 d postharvest varied between years, probably dependent upon condition at harvest from ponds. No significant differences ( P > 0.05) were observed for relative growth, feed conversion, or condition (relative weight) among groups at the conclusion of the experiments.