Effect of Stocking Density on the Survival and Growth of Hoplobatrachus occipitalis (Günther, 1858) (Amphibia: Dicroglossidae) of Tadpoles Reared in Ponds from Benin
Nahoua Issa Ouattara2
Emile Didier Fiogbe1
1 Laboratoire de Recherches sur les Zones Humides, Département de Zoologie, Faculté des Sciences et Techniques, Université d’Abomey-Calavi, BP: 526 Cotonou, Bénin
2 Laboratoire d’Hydrobiologie, UFR Biosciences, Université Félix Houphouet-Boigny, 22BP: 582 Abidjan 22, Côte d’Ivoire
International Journal of Aquaculture, 2018, Vol. 8, No. 18
Received: 14 May, 2018 Accepted: 28 Jun., 2018 Published: 27 Jul., 2018
© 2018 BioPublisher Publishing Platform
This is an open access article published under the terms of the Creative Commons Attribution License
, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Density is one of the important factors to be considered in frogs rearing. The current study aims to evaluate the effect of this parameter on the survival and growth of Hoplobatrachus occipitalis tadpoles in circular plastic ponds (Diameter: 24 cm; volume: 60 L) for 24 days. Four stocking densities (5, 10, 15 and 20 tadpoles/L), respectively represented by D1, D2, D3, and D4 were tested on tadpoles (initial mean weight 0.283 ± 0.031 g) in triplicate. Tadpoles were daily fed at 6% of biomass every hour from 8 a.m to 6 p.m on Coppens fish feed. At the end of experiment, parameters such as final biomass (9.386 ± 0.240 to 23.750 ± 0.601 g), specific growth rate (1.960 ± 0.326 to 4.220 ± 0.255%/d-1), daily weight gain (0.022 ± 0.021 to 0.735 ± 0.026 g/d), survival rate (30.388 ± 1.734 to 86.333 ± 3.333%) and feed conversion rate (1.436 ± 0.023 to 2.185 ± 0.218) showed the lowest values in the highest stocking densities. The final biomass, specific growth rate, daily weight gain and survival rate recorded in D1 tadpoles were significantly higher (p˂0.05) compared to the other lots. Thus the optimal stocking density is 5 tadpoles/L to ensure a good growth of H. occipitalis tadpoles in circular ponds.
Hoplobatrachus occipitalis; Intensive rearing; Tadpoles; Stocking density
(The advance publishing of the abstract of this manuscript does not mean final published, the end result whether or not published will depend on the comments of peer reviewers and decision of our editorial board.)
The complete article is available as a Provisional PDF
if requested. The fully formatted PDF and HTML versions are in production.
International Journal of Aquaculture
• Volume 8