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Title: Triploid grass carp in Lake Marion, South Carolina
Authors: Kirk, James Philip, 1948-
Killgore, K. Jack
Morrow, James V.
Foltz, Jeffrey W.
Keywords: Collection techniques
Grass carp
Population attributes
Aquatic plants
Biological control
Lake Marion (S.C.)
Aquatic Plant Control Research Program (U.S.)
Publisher: U.S. Army Engineer Waterways Experiment Station
Series/Report no.: Miscellaneous Paper (Aquatic Plant Control Research Program (U.S.)) ; no.Miscellaneous Paper A-96-2
Abstract: A 5-year study of triploid grass carp movement and population attributes was conducted in the Santee-Cooper reservoir system. Radiotelemetry showed no long-distance migrations, and fish did not move into the river channel. Triploid grass carp remained on upper Lake Marion (target control area), exhibited local movements averaging 0.10 to 0.29 km/day, and preferred open flats with hydrilla. Fish apparently avoided or moved away from areas with low dissolved oxygen. Skilled bowfishermen were used to collect triploid grass carp for age and growth analysis. Utricular otoliths (lapilli) and scales were successfully used to age triploid grass carp. This population exhibited linear growth through age 6 at a rate of 3 kg/year with 80-percent survival. Extrapolation of population models showed densities of 5 fish per surface hectare of water or 17 fish per vegetated hectare as of 1994. The study concluded that grass carp can be efficiently collected in large reservoirs, suitable aging structures exist, and efficacy of stocking can be successfully monitored using telemetry, population-density estimates, and growth rates.
Description: Miscellaneous Paper
Gov't Doc #: Miscellaneous Paper A-96-2
Rights: Approved for public release; distribution is unlimited
Appears in Collections:Miscellaneous Paper

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