Theses and Dissertations


Title: A preliminary age and growth study of largemouth bass, Micropterus salmoides (Lacepede), in the southern sector of Walter F. George Reservoir, Alabama

Name: Morris, David E.

Degree: MS

Chair: Dr. William L. Shelton

Resides: FAA Library

University: Auburn

Location: Auburn, Alabama

Date: 1973

Pages: 66

Keywords: Fishery biology,Age and Growth Study,Largemouth Bass,Walter F. George Reservoir,Alabama.

Abstract:

A preliminary age and growth study of largemouth bass, Micropterus salmoides (Lacepede), in the southern sector of Walter F. George Reservoir was conducted on fish collected between January 25, 1972, and April 19, 1972. A total of 478 bass were collected from six areas by electrofishing. Bass used in laboratory experiments were taken by angling. Age determinations were difficult due to indistinct, irregular, and discontinuous marks. Three distinct marks meeting the criteria established for an annulus were discernible. Mark I was termed a juvenile mark and was probably formed due to a change in food habits. The mean total-lengths of bass when Marks II and III were formed closely corresponded with the first and second peaks on the length-frequency curve and could represent year marks. Abundance of food and warm winters were probably responsible for the difficulty in age and growth determinations. A sex ratio of 1.56 males to each female was found. The length-weight relationship formula for the 478 bass collected was W = 0.000001024 L3.4601. A high relative condition factor, Kn, was found for males and females. Most bass appeared to mature in the first year of life at approximately 300 mm in total length. The peak of spawning was during April and early May with at least a few bass spawning in early March. Bass were taken at a rate of approximately one fish per minute of actual electrofishing time.

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