Theses and Dissertations


Title: Production responses of fish to added attachment surface for fish-food organisms

Name: Pardue, Garland Burnis

Degree: PhD

Chair: Dr. Homer S. Swingle

Resides: FAA Library

University: Auburn

Location: Auburn, Alabama

Date: 1969

Pages: 77

Keywords: Added Attachment Surface,Fish-Food Organisms.

Abstract:

Experiments were conducted in earthen ponds and plastic pools during the period May, 1966 to November, 1968 to evaluate the production responses of fish to added attachment surface for fish-food organisms. Three species of fish were used, Nile tilapia (Tilapia aurea, Steindachner), bluegill (Lepomis macrochirus, Rafinesque), and common carp (Cyprinus carpio, Linnaeus). Rough pine boards, alder brush, and sheets of clear polyethylene were used as the added attachment surface in plastic pools. Average standing crop of tilapia was greater in earthen ponds with no added attachment surface than in ponds with 15 per cent added attachment surface. Average standing crop of bluegills in ponds did not change with increases to 15 per cent in added attachment surface. Standing crops of bluegills in plastic pools increased with increases in added attachment surface. Average standing crop of common carp was essentially the same in fertilized plastic pools containing rough pine boards, alder brush, sheets of clear polyethylene, and pools receiving only fertilizer. Significant increases in standing crop of fish were obtained with increases in added attachment surface only when large amounts of added attachment surface were used with bluegill in plastic pools. There was no correlation between survival of tilapia, bluegill, and common carp and with of fish produced in ponds and plastic pools. Production of tilapia, bluegill, and common carp was greater in ponds and pools receiving treatments of fertilizer than in non-fertilized ponds and pools. Average weight of tilapia taken at intervals with the use of seines during the 1966 experimental period were indicative of the average weight at draining while average weights of bluegill taken at intervals with the use of seines during the 1967 experimental period over-estimated the average weight at draining. Chironomid larvae were the most abundant group of fish-food organisms found on added attachment surfaces. The standing crop of potential fish food organisms in bottom muds was higher in the deep ends of ponds than it was in the shallow ends of ponds.

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