This article is made freely available as part of this journal's Open Access: ID | Saviour-ManuscriptRef.2-ajira090717 |
Affiliation.
1. University of Uyo | Department of Fisheries and Aquatic Environmental Management | Uyo | Nigeria |
1. University of Uyo | Department of Fisheries and Aquatic Environmental Management | Uyo | Nigeria |
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American Journal of Innovative Research & Applied Sciences
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| | ARTICLES | Am. J. innov. res. appl. sci. Volume 5, Issue 2, Pages 138-144 (August 2017) |
| Research Article |
American Journal of innovative
Research & Applied Sciences
Research & Applied Sciences
ISSN 2429-5396 (Online)
OCLC Number: 920041286
OCLC Number: 920041286
|
| AUGUST | VOLUME 5 | N° 2 | 2017 |
ABSTRACT
Background: Stocking density refers to the weight of fish per unit volume or the number of fish stocked at the beginning of an experiment. Available space and adequate water for exchange are two factors which could greatly affect the productivity of aquaculture in conjunction with the target species, hence, must be optimally utilized. Objectives: African Sharptooth catfish, albino Clarias gariepinus was cultured at four different densities in collapsible tanks to evaluate the effect of stocking density on growth response, survival rate and feed utilization. Materials and methods: Two hundred and seventy (270) fish with initial weight of 1.09g, 0.80g, 0.61g, 0.71g were stocked at 15/m2, 20/m2, 25/m2 and 30/m2 respectively. The experiment lasted for 140 days. The experimental fish were fed 6% of their body biomass daily and the weight and length were taken biweekly while the physico-chemical parameters were recorded weekly. Results: The final mean weights of the fish stocked at stocking densities of 15/m2, 20/m2, 25/m2 and 30/m2 were 104.21 ±10.38g, 106.65 ± 11.04g, 110.23 ± 23.68g and 78.88 ± 7.58g respectively. The corresponding mean values of specific growth rate were 0.03, 0.04, 0.03, 0.03. The feed conversion Ratio (FCR) was 1.62, 1.06, 1.36, 1.29 and survival rates were calculated to be 82.22%, 85%, 45.67% and 60% accordingly. At the end of the experiment the result showed that the survival rate of the stocking densities of 15/m2, 20/m2 and 30/m2 were not significantly different (P>0.05) but stocking density 25m2 was significantly different (P<0.05) from stocking densities 15/m2, 20/m2 and similar to stocking density 30/m2, stocking density 25/m2 had the highest mean weight gain (110.23g ± 23.68) compared to the other treatments which was the best. Conclusion: It was concluded from the results that high stocking densities had negative impacts on the growth performance and feed utilization of the albino Clarias gariepinus.
Keyword: aquaculture, fish, survival rate, proximate composition
Background: Stocking density refers to the weight of fish per unit volume or the number of fish stocked at the beginning of an experiment. Available space and adequate water for exchange are two factors which could greatly affect the productivity of aquaculture in conjunction with the target species, hence, must be optimally utilized. Objectives: African Sharptooth catfish, albino Clarias gariepinus was cultured at four different densities in collapsible tanks to evaluate the effect of stocking density on growth response, survival rate and feed utilization. Materials and methods: Two hundred and seventy (270) fish with initial weight of 1.09g, 0.80g, 0.61g, 0.71g were stocked at 15/m2, 20/m2, 25/m2 and 30/m2 respectively. The experiment lasted for 140 days. The experimental fish were fed 6% of their body biomass daily and the weight and length were taken biweekly while the physico-chemical parameters were recorded weekly. Results: The final mean weights of the fish stocked at stocking densities of 15/m2, 20/m2, 25/m2 and 30/m2 were 104.21 ±10.38g, 106.65 ± 11.04g, 110.23 ± 23.68g and 78.88 ± 7.58g respectively. The corresponding mean values of specific growth rate were 0.03, 0.04, 0.03, 0.03. The feed conversion Ratio (FCR) was 1.62, 1.06, 1.36, 1.29 and survival rates were calculated to be 82.22%, 85%, 45.67% and 60% accordingly. At the end of the experiment the result showed that the survival rate of the stocking densities of 15/m2, 20/m2 and 30/m2 were not significantly different (P>0.05) but stocking density 25m2 was significantly different (P<0.05) from stocking densities 15/m2, 20/m2 and similar to stocking density 30/m2, stocking density 25/m2 had the highest mean weight gain (110.23g ± 23.68) compared to the other treatments which was the best. Conclusion: It was concluded from the results that high stocking densities had negative impacts on the growth performance and feed utilization of the albino Clarias gariepinus.
Keyword: aquaculture, fish, survival rate, proximate composition
Authors Contact
*Correspondant author and authors Copyright © 2017:
| Saviour Isonguyo Umanah 1 | and | Tony Dapa 2 |
*Correspondant author and authors Copyright © 2017:
| Saviour Isonguyo Umanah 1 | and | Tony Dapa 2 |
THE EFFECT OF STOCKING DENSITY ON THE GROWTH PERFORMANCE AND FEED UTILIZATION OF ALBINO Clarias gariepinus REARED IN COLLAPSIBLE TARPULIN TANKS
| Saviour Isonguyo Umanah 1 | and | Tony Dapa 2 |. Am. J. innov. res. appl. sci. 2017; 5(2):138-144.
| PDF FULL TEXT | |Received | 09 July 2017| |Accepted | 18 July 2017| |Published 24 July 2017|
| Saviour Isonguyo Umanah 1 | and | Tony Dapa 2 |. Am. J. innov. res. appl. sci. 2017; 5(2):138-144.
| PDF FULL TEXT | |Received | 09 July 2017| |Accepted | 18 July 2017| |Published 24 July 2017|