Theses and Dissertations

Title: Organic composition of twenty-two species of freshwater fishes of Alabama

Name: Reagan, Jr Roland Edward

Degree: MS

Chair: Dr. John M. Lawrence

Resides: FAA Library

University: Auburn

Location: Auburn, Alabama

Date: 1969

Pages: 53

Keywords: Organic Composition,Freshwater Fishes,Alabama.


Samples of 22 species of freshwater fishes were collected from 13 locations, including two habitats, large impoundments and farm ponds. Analyses for per cent moisture, per cent crude protein, per cent ether extract, calories per gram and per cent carbon were made on dried samples of the fishes. It was found that moisture content ranged from 50 to 80 per cent, crude protein from 46 to 83 per cent, ether extract from 2.1 to 37.0 per cent, calories per gram from 3568 to 6240 and carbon from 34.2 to 68.4 per cent. In bluegill (Lepomis macrochirus Rafinesque) and largemouth bass (Micropterus salmoides Lacepede), per cent moisture and per cent crude protein decreased with increasing length of fish, while per cent ether extract increased with increasing length of fish. Calories per gram and per cent carbon increased with length in both species are thought to be related to fat content. Bluegill and largemouth bass collected from fertilized ponds had a higher per cent ether extract and more calories per gram than those from large impoundments. Per cent moisture and per cent crude protein were negatively correlated with per cent ether extract in largemouth bass and bluegill.

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