J. P. Kirk

Distribution and Population Attributes of Gulf Sturgeon in the Lower Pearl River System, Louisiana

Seven reaches of the lower Pearl River system were sampled with bottom set gill nets from 1992 through 1995. One hundred fifty-eight Gulf sturgeon (Acipenser oxyrinchus desotoi) were captured in 3 reaches. Mean fork length (FL) was 734 mm, and weight (W, g) to length (FL, mm) relation was: W = 1.786 x lO^CFL)3204. Mean weight loss during summer was 1.9 g/day. Ninety-two percent of Gulf sturgeon were captured in the West Middle River reach which is comprised of deep holes and little current. Radio telemetry indicated that the West Middle River was an important summer habitat for juveniles...


Age and Growth of Grass Carp in Lake Guntersville, Alabama

A total of 139 grass carp (Ctenopharyngodon idella) of unknown ploidy were collected by bowfishing during 1993 and 1994 in Lake Guntersville, Alabama. Ages were determined from sectioned otoliths (lapilli), then age-specific total lengths were back-calculated using scales of known age. Mean back-calculated total lengths of grass carp were 334, 627, 768, 852, 896, 895, 920, 965, and 973 mm at ages 1 through 9, respectively. A length-to-weight relationship was calculated as: weight (g) = 0.00000519 x total length mm3-14, r2 = 0.92. A von Bertalanffy growth equation described growth as: Lt =...


A Late Spring Survey of Pelagic Prey in Lake Moultrie, South Carolina‚ÄĒImplications for Management

We performed a hydroacoustic survey of fishes in Lake Moultrie, South Carolina, in May 1993. Pelagic fish densities were less than 70/ha with an average size of approximately 13 cm; densities of benthic fishes, most likely catfishes (Ictalurus spp.), were much higher, approximately 600/ha. Fish densities encountered in May were nearly 2 orders of magnitude less than either those reported in 32 years of fall rotenone surveys or in fall hydroacoustic surveys in upstream reservoirs. Confirmation of these low fish densities will require expanding sampling efforts. If validated, our findings...


Effect of Striped Bass Introduction in Lake Wateree, South Carolina

The establishment of a striped bass (Morone saxatilis) fishery in Lake Wateree, South Carolina, did not detrimentally influence largemouth bass (Micropterus salmoides) growth, abundance, or condition. There was no evidence striped bass introduction altered the clupeid, primarily Dorosoma spp., or the Lepomis ,Ipp. prey base. An important fishery was added, however, to the reservoir. The authors suggest care in applying results to other less fertile, prey deficient reservoirs.