Theses and Dissertations


Title: Effects of stocking rates of channel catfish on standing crop of oligochaeta (Annelida)

Name: Tangtrongpiros, Manob

Degree: MS

Chair: Dr. M.M. Pamatmat

Resides: FAA Library

University: Auburn

Location: Auburn, Alabama

Date: 1974

Pages: 40

Keywords: Stocking Rates,Channel Catfish,Oligochaeta (Annelida).

Abstract:

In a 10.3-ha pond, pens stocked with 400, 600, or 800 channel catfish in combination with 200 Tilapia were sampled for bevthic biomass six times from June 23 through October 19, 1974. The only benthos present were larvae of Chironomidae and oligochaete worms. Oligochaetes outnumbered chironomids 60 to 1. Oligochaeta was represented by the family Tubificidae and Lumbriculidae. Limnodrilus hoffmeisteri was the most abundant, followed by L. profundicola and L. claparedeanus. The overall mean wet, dry, and ash-free dry biomass of oligochaetes was 2.16, 1.09, and 0.66g/m2, respectively. Apparently as a result of catfish predation, there was a negative correlation between number of harvested catfish and oligochaete biomass during the last two sampling dates, and significant reduction in number and biomass of oligochaetes with time.

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