Experimental partitioned co-culture of channel catfish Ictalurus punctatus and blue tilapia Oreochromis aureus

Perschbacher Peter W., . Experimental partitioned co-culture of channel catfish Ictalurus punctatus and blue tilapia Oreochromis aureus. pp. 88-95. ISSN 0116-6514

Blue tilapia Oreochromis aureus were experimentally co-cultured with channel catfish Ictalurus punctatus in floating cages without supplemental feeding. Tilapia were stocked on April 20 1995 at the equivalent of 5000ha-1and channel catfish fingerlings were stocked on Mar. 20 1995 at 27500 ha. After harvest on Oct. 23 1995 (185d) tilapia averaged 437.7 4.26g each. From a stocking size of 24.9 5.16 g the daily growth was 2.2 0.23g.d. Improvements in water quality in co-culture were reduced levels of pH TAN (total ammonia-nitrogen) and UIA (un-ionized ammonia). Aeration in co-culture ponds was significantly higher in August. Chlorophyll a was not significantly different. Mean net combined yield in co-culture ponds with the addition of 2118.55 367.15 kg.ha tilapia was significantly higher 12001.64 767.43 vs. 10 055.74 734.70 kg.ha than in monoculture. FCR (food conversion ratios) for catfish were not significantly different; however with tilapia included they were significantly lower 1.58 0.11 vs. 1.85 0.85. Blue tilapia were beneficial to production and outperformed Nile tilapia in a similar system by reaching marketable size (0.4 kg) with no additional feed.

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Abstract

Blue tilapia Oreochromis aureus were experimentally co-cultured with channel catfish Ictalurus punctatus in floating cages without supplemental feeding. Tilapia were stocked on April 20 1995 at the equivalent of 5000ha-1and channel catfish fingerlings were stocked on Mar. 20 1995 at 27500 ha. After harvest on Oct. 23 1995 (185d) tilapia averaged 437.7 4.26g each. From a stocking size of 24.9 5.16 g the daily growth was 2.2 0.23g.d. Improvements in water quality in co-culture were reduced levels of pH TAN (total ammonia-nitrogen) and UIA (un-ionized ammonia). Aeration in co-culture ponds was significantly higher in August. Chlorophyll a was not significantly different. Mean net combined yield in co-culture ponds with the addition of 2118.55 367.15 kg.ha tilapia was significantly higher 12001.64 767.43 vs. 10 055.74 734.70 kg.ha than in monoculture. FCR (food conversion ratios) for catfish were not significantly different; however with tilapia included they were significantly lower 1.58 0.11 vs. 1.85 0.85. Blue tilapia were beneficial to production and outperformed Nile tilapia in a similar system by reaching marketable size (0.4 kg) with no additional feed.

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Item Type:	Article
AGROVOC Term:	Ictalurus punctatus
AGROVOC Term:	Oreochromis aureus
AGROVOC Term:	Freshwater catfish
AGROVOC Term:	Tilapia
AGROVOC Term:	Fingerlings
AGROVOC Term:	Ammonia
AGROVOC Term:	Nitrogen
AGROVOC Term:	Aeration
AGROVOC Term:	Chlorophylls
AGROVOC Term:	Ponds
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/23759

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