Wilfred J. Dean, Jr.

Orangemouth Corvina and Orangemouth Corvina x Spotted Seatrout Hybrids in a Freshwater Reservoir

Post-stocking survival, biomass, food habits, growth, and angler utilization of orangemouth corvina (Cynoscion xanthulus) (OMC), spotted seatrout (C. nebulosus) (SST) X OMC hybrids, and OMC X SST hybrids were monitored from 1986 to 1990 at Calaveras Reservoir, a south Texas urban impoundment, after introductions from 1984 to 1986. Survival was excellent for all introduced fishes. Peak catch per unit effort by gill nets coincided with peak biomass estimates determined from cove rotenone sampling in 1987. Although similarly dense populations of blue tilapia (Tilapia aurea) and shad (Dorosoma...


Effect Of Temperature On Walleye Egg Hatch Rate

This study was conducted to determine if water temperature increases during the walleye (Stizostedion vitreum vitreum) spawning period reduced egg hatch rate and if water temperature manipulation during egg fertilization would increase hatch rate. Walleye eggs were subjected, before and during fertilization, to 1 of 3 treatments involving water temperatures above and below 12 C. Water temperatures above 12 C were found to reduce hatch rates. Stripping and fertilizing eggs collected from reservoir water temperatures above 12 C into water chilled to 7.2 C significantly increased hatch rates...