The Use of Herbicides to Control Hydrilla and the Effects on Young Largemouth Bass Population Characteristics and Aquatic Vegetation in Lake Seminole, Georgia

Maceina, Michael J. and Slipke, Jeffery W. (2004) The Use of Herbicides to Control Hydrilla and the Effects on Young Largemouth Bass Population Characteristics and Aquatic Vegetation in Lake Seminole, Georgia. Journal of Aquatic Plant Management, 42, pp. 5-11.

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Official URL: http://www.apms.org/japm/vol42/v42p5.pdf

Abstract

From 1997 to 2003, we examined the impacts of two aquatic herbicides, fluridone (Sonar; 1-methyl-3-phenyl-5-[3-(trifluromethl) phenyl]-4(1H)-pyridinone), and dipotassium salt of endothall (Aquathol K; 7-oxabicyclo[2.2.1]heptane-2,3-dicarboxylic acid), used to control dense hydrilla (Hydrilla verticillata L. f. Royle), on population characteristics of juvenile largemouth bass (Micropterus salmoides Lacepede) in small coves (<10 ha) in Lake Seminole, Georgia. In addition, we estimated areal coverage and species composition of submersed aquatic vegetation (SAV) communities in each cove. Fish and plants were sampled in both control (hydrilla infested)and herbicide treated coves in November and March- April each year. Electrofishing catch-per-effort for both number and weight of age-0 and age-1 fish for the 1997 to 2002 year classes was either the same or higher (p < 0.05) in herbicide treated than in control coves. Age-0 fish were larger (p <0.05) in treated, than in control coves in November, but at age-1 in the following spring, fish were slightly longer (p <0.05) in the control coves. Higher age-0 catches were associated with greater percent reductions in numeric catch between age-0 and age-1 and reduced lengths of fish in November indicating density-dependent effects. Age-0 fish lengths were also negatively correlated to percent cover of both total and native SAV. Total or native SAV coverages were not associated with catch-per-unit effort for number and weight, but nearly all control and herbicide treated coves had total SAV coverage greater than 40%. Applications of both Sonar and Aquathol K reduced total SAV coverage and hydrilla, permitted the establishment of native SAVs, and had either neutral or positive impacts on young largemouth bass in small coves in Lake Seminole. (PDF contains 7 pages.)

Item Type: Article
Title: The Use of Herbicides to Control Hydrilla and the Effects on Young Largemouth Bass Population Characteristics and Aquatic Vegetation in Lake Seminole, Georgia
Personal Creator/Author:
CreatorsEmail
Maceina, Michael J.
Slipke, Jeffery W.
Refereed: Yes
Journal or Publication Title: Journal of Aquatic Plant Management
Volume: 42
Page Range: pp. 5-11
Date: 2004
Latitude: 30.4231
Longitude: -84.864
Issuing Agency: Aquatic Plant Management Society, Inc.
Uncontrolled Keywords: submersed aquatic vegetation; largemouth bass; catch-per-effort; Sonar; Aquathol K; native submersed vegetation; largemouth bass; Micropterus salmoides; Lake Seminole; Georgia
Subjects: Ecology
Pollution
Biology
Item ID: 1657
Depositing User: Jennifer Walton
Date Deposited: 07 Nov 2008 23:47
Last Modified: 29 Sep 2011 20:12
URI: http://aquaticcommons.org/id/eprint/1657

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