Gene R. Wilde

Gill Net Sample Size Requirements for Temperate Basses, Shads, and Catfishes

I estimated variance-mean (s2-x ) relationships for gill net catches of 8 forage and sportfish species plus a composite group composed of all species combined. These relationships explained 75%-95% of the variation in loge(s2). Predictive equations for loge(s2) were back-transformed to a linear scale, adjusted to correct for transformation bias, and substituted into a standard equation for estimating sample size requirements as a function of the desired level of precision and expected sample mean. Sample size requirements for all species increased with an increase in the desired level of...

Year
1993

Demographic and Social Characteristics and Management Preferences of Texas Freshwater Catfish Anglers

Results from statewide angler surveys conducted during 1987 through 1990 were combined to examine demographic and social characteristics and management preferences of Texas freshwater catfish anglers. Catfish anglers were grouped by their first-choice responses when asked to "Name the fish you most prefer to catch in fresh water in Texas." Anglers for blue catfish (Ictalurus furcatus), channel catfish (/. punctatus), and flathead catfish (Pylodictus olivaris), and those who provided a generic response "catfish" differed significantly (P < 0.05) in age, gender, self-rated skill, years of...

Year
1992

Gill Net Selectivity and Size Structure in White Bass

I used a normal-skew model to calculate length-specific selection curves for white bass caught in gill nets in 55 Texas reservoirs. I used these selection curves to adjust 2 size-structure indices, proportional stock density (PSD), and relative stock density (RSD) for gill net mesh-size selectivity. Differences between adjusted and unadjusted values of PSD and RSD were small (0.6 and 2.0, respectively) when the unadjusted values were extreme (i.e., ≤10 or ≥91). When unadjusted values of PSD and RSD were between 10 and 91, mean absolute differences between adjusted and unadjusted values...

Year
1991

Freshwater and Saltwater Anglers: A Comparative Analysis of Differences in Attitudes Toward Management Tools

Philosophies of fisheries management have evolved through time and have affected, and been affected by, traditional uses of various (different) fisheries. Because of historic differences in management and utilization of freshwater and saltwater fisheries, we expected to find differences among freshwater and saltwater anglers in their support for (attitudes toward) management regulations. Using results from a statewide questionnaire of anglers in Texas, basic social and demographic characteristics and attitudes toward management tools were compared for 3 groups of anglers: those who fish in...

Year
1991