Donald Harrison

The Anchored Gill Net Shad Fishery of the Altamaha River, Georgia

From 2007 to 2009, we quantified total effort and catch of the anchored gill net American shad (Alosa sapidissima) fishery in the Altamaha River, Georgia. We observed and recorded catch data of commercial fishermen interspersed throughout the river. These fishermen also recorded their daily catch and effort in log books. Total harvest of American shad was lowest in January and highest in February of each season. Total fishing effort was estimated monthly and was combined with catch-per-unit-effort data to estimate total harvest monthly. Most harvest and effort occurred in the lower...

Population Changes of Sportfish Following Flathead Catfish Introduction inthe Satilla River, Georgia

A standardized sampling dataset collected from 1991-2007 on the Satilla River, Georgia, was used to document changes in bluegill (Lepomis macrochirus), largemouth bass (Micropterus salmoides), and redbreast sunfish (L. auritus) populations after the introduction of flathead catfish (Pylodictis olivaris). Repeated measures ANOVA was conducted incorporating a control area, where flathead catfish abundance is extremely low, and a flathead area, where flathead catfish have become well established, for both before (1991-1995) and after (1996-2007) flathead invasion. The analyses revealed...

Fishery Dynamics of Macrophyte-dominated Banks Lake National Wildlife Refuge, Georgia

Banks Lake National Wildlife Refuge is a 1,640-ha refuge consisting of 405 ha open water (Banks Lake) and 1,235 ha of cypress swamp, marsh, and uplands located in southern Georgia. Fishes from Banks Lake, a system with problematic densities of both indigenous and nonindigenous aquatic vegetation, were collected during eight sampling periods in open water habitats from 1992 through 2003 to evaluate assemblage and sportfish dynamics. Stability and persistence analyses indicated that the fish assemblage was stable and persistent over time, though catch per unit effort of assemblage members...