Impact of abiotic factors on some biological indices of Cyprinus carpio (L., 1758) in Ghrib dam lake, (Algeria) |
| |
| Authors: | Meriem Attal Fouzia Attou Mounia Baha Abdeslem Arab |
| |
| Affiliation: | 1. U.S.T.H.B.: Dynamic and Biodiversity Laboratory, Faculty of Biologic Sciences (FSB), El Alia, Algiers, Algeria;2. Ecole Normale Supérieure, Vieux ‐Kouba, Algiers, Algeria |
| |
| Abstract: | This study was conducted with a sample of 733 Cyprinus carpio collected between May 2013 and February 2016 from the ecosystem lake in the Ghrib dam which is eutrophic. Cyprinus carpio in this dam is characterized by a single fractional spawning that begins in the spring and ends in the late summer. The distributions of the viscerosomatic and gonadosomatic indices decrease between the spring and summer seasons. These periods correspond to the spawning period and the biological break of this species. They progressively increase between autumn and winter when the biological activity of the species returns. The hepatosomatic index progressively decreases between the spring and the summer when the hepatic reserves are used for reproduction. The repletion index shows that the trophic activity of C. carpio is intense in the spring. The condition factor varies between 1.1 and 1.35. The evolution of the biological indices of both sexes is well stressed in well‐defined periods according to the seasons. The values are weak for males and high for females. The redundancy analysis allows the characterization of the influence of the physico‐chemical parameters of the dam water, especially the role of the nutritious elements, in the biological seasonal cycle of C. carpio. |
| |
| Keywords: | Algeria biological indices
Cyprinus carpio
dam physico‐chemical parameters reproduction |
|
|
