Influence of Tank Water Depths on Reproductive Performance of Catfish (Heterobranchus longifilis) Valenciennes, 1840

Otoh A. J. *

Department of Fisheries and Aquaculture, Faculty of Agriculture, Akwa Ibom State University, Obio, Akpa Campus, Oruk Anam, Nigeria.

*Author to whom correspondence should be addressed.


Abstract

Aims: To determine the optimum water depth required for catfish spawning in hatcheries.

Study Design: Treatments were assigned using complete randomized design.

Place and Duration of Study: Fish Farm Complex of the Akwa Ibom State University (AKSU), Nigeria.

Methodology: Eighteen (18) similarly-sized H. longifilis broodstock (2.51-2.53 kg, 64 – 66 cm): comprising six broodstock of three males and three females, were held for six months at 0.50 m, 0.75 m and 1.0 m pond water depth. All males were sacrificed for milt extraction without hormonal inducement; with milt from each treatment diluted with normal saline solution. Female broodstock from each treatment were separately induced with ovaprim hormones at a single dosage of 0.5ml/kg body weight of fish and allowed for 16 hours before manual stripping; 3g of egg from each broodstock and mixed with the diluted milt and activated with 100 ml of normal saline. The fertilized eggs were incubated and thereafter assessed for percentage fertilization, hatchability, survival and fry production success.

Results: broodstock reproductive parameters significantly increased (P = 0.00) with water depth of broodstock culture tank. Percentage fertilizations were: 49.50±0.78, 68.17±0.93, and 82.50±1.44; respectively. Percentage hatchability of broodstock eggs were: 91.37±1.65 significantly higher for 1.0 m water depth group than 67.79±4.58 from 0.75 m water depth treatment while the least value of hatchability 50.31± 0.78 was recorded for broodstock raised at 0.50 m water depth. The fish group raised at 1.0 m water depth also exhibited highest percentage survival value of 97.02 ± 1.09 and fry production success value of 73.08 ± 0.53 while broodstock raised at 0.50 m water depth indicated the least values: % survival, 8.38 ± 0.48 and fry production success of 2.07 ± 0.07. Conclusion: In times or places of water scarcity, H. longifilis broodstock may be raised at pond water of 0.5 m to 1.0 m. But the water depth that would afford the best breeding and reproductive performance is at 1.0 m depth.

Keywords: Artificial fertilization, breeding, fish stress, hatchery production, fish culture, African catfish


How to Cite

A. J., Otoh. 2024. “Influence of Tank Water Depths on Reproductive Performance of Catfish (Heterobranchus Longifilis) Valenciennes, 1840”. Asian Journal of Fisheries and Aquatic Research 26 (6):36-42. https://doi.org/10.9734/ajfar/2024/v26i6774.

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