Theses and Dissertations

Title: A comparison of northern largemouth bass, Micropterus salmoides salmoides (Lacepede), the Florida subspecies, Micropterus salmoides floridanus (Lesueur), and their intergrades

Name: Thrasher, David R.

Degree: MS

Chair: Dr. J.S. Ramsey

Resides: FAA Library

University: Auburn

Location: Auburn, Alabama

Date: 1974

Pages: 76

Keywords: Northern Largemouth Bass,Florida Largemouth Bass,Intergrades,Micropterus salmoides salmoides,Micropterus salmoides floridanus.


Meristic variation in 1375 specimens of Micropterus salmoides salmoides (Lacepede) and Micropterus salmoides floridanus (Lesueur) is analyzed. The discriminant function analysis is employed for practical and consistent separation of the two subspecies.No correlation was observed between number of pyloric caeca and standard length or condition factor. Number of scales along the lateral line appears to be the best single character for separation of salmoides and floridanus. Specimens from the zone of intergradation are intermediate in meristic counts. Specimens from artificially intergrading populations outside the natural zone of intergradation also are intermediate in meristic counts. Differences in color pattern between the two subspecies were observed. No genetic differences in growth potential seem to exist, but there appears to be a significant difference in catchability between the two subspecies.

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