[ Caractéristiques de la croissance et facteur de condition k de Clarias jaensis (Boulenger, 1909) pêchée dans les rivières de la plaine inondable des Mbô (Cameroun) ]
Volume 43, Issue 1, June 2019, Pages 1–9
Tchouante Tzukam Christelle1, Thomas Efole EWOUKEM2, and JOSEPH TCHOUMBOUE3
1 Département de Production Animales, Université de Dschang, Bp : 222 Dschang, Cameroon
2 Département de Foresterie, Faculté d’agronomie et des Sciences Agricoles (FASA), Université de Dschang, BP : 222 Dschang, Cameroon
3 Département des Productions Animales, Faculté d’agronomie et des Sciences Agricoles (FASA), Université de Dschang, BP : 222 Dschang, Cameroon
Original language: French
Copyright © 2019 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The study on the characteristics of growth and condition factor K of Clarias jaensis was made in the floodplain of Mbô in Cameroon according to site, season, sex and size class. To assess the structure and dynamics of the population of C. Jaensis, in order to reduce mismanagement of fishing, 230 fish caught by "hawk" type gill nets, hooks and baited traps were collected monthly in three sites (Menoua, Nkam and flooded ponds) among fishermen between November 2016 and September 2017. The measurements and weighings of the total and standard lengths, then the total weight and eviscerated weight of the specimens ranged from 12.00 to 52.00 cm and 10.50 to 47, 50 cm respectively; Between 9.99 to 1165.59 g and 8.65 to 1119, 80 g. Overall, this species has a positive allometry growth. However, it showed seasonal variations. Thus, in the dry season, it passes from positive allometry to negative allometry regardless of sex and state of maturity, then isometry growth in the Nkam River to allometry positive in Menoua and flooded ponds. Condition factor K varied between 1.05 and 1.17 regardless of the factor considered. However no significant differences were observed. In view of these results, C. Jaensis could be considered as potential candidate for aquaculture
Author Keywords: Length-weight, K-factor, allometry growth, Mbô Plain, Cameroon.
Volume 43, Issue 1, June 2019, Pages 1–9
Tchouante Tzukam Christelle1, Thomas Efole EWOUKEM2, and JOSEPH TCHOUMBOUE3
1 Département de Production Animales, Université de Dschang, Bp : 222 Dschang, Cameroon
2 Département de Foresterie, Faculté d’agronomie et des Sciences Agricoles (FASA), Université de Dschang, BP : 222 Dschang, Cameroon
3 Département des Productions Animales, Faculté d’agronomie et des Sciences Agricoles (FASA), Université de Dschang, BP : 222 Dschang, Cameroon
Original language: French
Copyright © 2019 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
The study on the characteristics of growth and condition factor K of Clarias jaensis was made in the floodplain of Mbô in Cameroon according to site, season, sex and size class. To assess the structure and dynamics of the population of C. Jaensis, in order to reduce mismanagement of fishing, 230 fish caught by "hawk" type gill nets, hooks and baited traps were collected monthly in three sites (Menoua, Nkam and flooded ponds) among fishermen between November 2016 and September 2017. The measurements and weighings of the total and standard lengths, then the total weight and eviscerated weight of the specimens ranged from 12.00 to 52.00 cm and 10.50 to 47, 50 cm respectively; Between 9.99 to 1165.59 g and 8.65 to 1119, 80 g. Overall, this species has a positive allometry growth. However, it showed seasonal variations. Thus, in the dry season, it passes from positive allometry to negative allometry regardless of sex and state of maturity, then isometry growth in the Nkam River to allometry positive in Menoua and flooded ponds. Condition factor K varied between 1.05 and 1.17 regardless of the factor considered. However no significant differences were observed. In view of these results, C. Jaensis could be considered as potential candidate for aquaculture
Author Keywords: Length-weight, K-factor, allometry growth, Mbô Plain, Cameroon.
Abstract: (french)
L’étude sur les caractéristiques de la croissance et le facteur de condition K de Clarias jaensis a été faite dans la plaine inondable des Mbô au Cameroun en fonction du site, de la saison, des sexes et des classes de taille. Pour évaluer la structure et la dynamique de la population de C. jaensis, afin de réduire la mauvaise gestion de pêche, 230 poissons capturés par des filets maillants de type « épervier », hameçons et des nasses appâtées ont été collectés mensuellement dans trois sites (Menoua, Nkam et les étangs inondés) auprès des pécheurs entre novembre 2016 et septembre 2017. Les mensurations et pesés des longueurs totale et standard, puis le poids total et le poids éviscéré des spécimens varient respectivement entre 12,00 à 52,00 cm (LT) et 10,50 à 47,50cm (LS) ; entre 9,99 et 1165,59 g (PT) et 8,65 à 1119,80g. Dans l’ensemble, cette espèce a une croissance allométrie positive, cependant, elle a présenté des variations saisonnières. C’est ainsi qu’en saison sèche, la croissance passe d’allométrie positive à allométrie négative quels que soient le sexe et l’état de maturité, ensuite de croissance isométrie dans la rivière Nkam à allométrie positive dans la Menoua et les étangs inondés. Le facteur de condition K a varié entre 1,05 et 1,17 quels que soit le facteur considéré. Toutefois aucune différence significative n’a été observée. Au vue de ces résultats, C. jaensis pourrait être considéré comme un candidat potentiel pour l’aquaculture.
Author Keywords: Longueur-poids, facteur K, croissance allométrie, plaine des Mbô, Cameroun.
How to Cite this Article
Tchouante Tzukam Christelle, Thomas Efole EWOUKEM, and JOSEPH TCHOUMBOUE, “Growth characteristic and condition factor K of Clarias Jaensis (Boulenger, 1909) caught in the floodplain rivers of Mbô (Cameroon),” International Journal of Innovation and Scientific Research, vol. 43, no. 1, pp. 1–9, June 2019.
