Résumé

The knowledge on fish feeding in natural milieu is considered as a necessary step in understanding the biological and the ecological features of the fish species. Therefore, the present study aimed to provide quantitative and qualitative data of the feeding habits of Cyprinus carpio in Foum El-Khanga dam (Souk-Ahras, Algeria) during an annual cycle from Mach 2015 to February 2016. The stomach of 347 specimens was analyzed function of the year, seasons of sampling and the sexes of fish. In order to determine the diet of the studied species, the vacuity index (%VI), numerical abundance (N%), frequency of occurrence (F%), and the index of relative importance (IRI) were studied. Among the total examined stomachs, 195 contained preys, and 152 were obviously empty and corresponding to the coefficient of an average annual vacuity index of 43.80%. The monthly fluctuation has evidenced a seasonal diet rhythm, presenting maximal values in spring, characterized by slowing down the trophic activity. The qualitative analysis of the digestive contents has evidenced a diversified regimen diet with 3,051 counted payers. Different eight groups were identified (crustaceans, phytoplankton, fish, nematodes, insects, mud, plants debris and unidentified). This analysis reveals that C. carpio of Foum El-Khanga dam is an omnivore species mainly feeds on crustaceans (copepods), and alternatively on phytoplankton (algae). The diet of this species varies function of season and sexes. The ingested proportion of crustaceans was found higher in males than in females. Though, the digital fluctuations of the ingested preys by C. carpio, along with the statistical comparison using the Spearman correlation coefficient have showed a homogeneous diet during the four seasons of sampling and between the two sexes.
Key Words: common carp, diet, Spearman correlation coefficient (rho), omnivore, trophic activity.

Information

Item Type:	Journal
Divisions:	» Laboratoire des Ecosystèmes Aquatiques et Terrestres » Faculté des Sciences de la Nature et de la Vie
ePrint ID:	1255
Date Deposited:	2018-05-22
Further Information:	Google Scholar
URI:	https://www.univ-soukahras.dz/fr/publication/article/1255

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