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Condition factor of a natural strain of Hybrid (Coptodon zillii x C. guineensis) infested by gill Monogenean parasites in sector IV of the Ebrié lagoon (Côte d’Ivoire)

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Author Affiliations

  • 1Research Unit on Ecology and Biodiversity, Laboratory of Ecology and Sustainable Development, Nangui Abrogoua University, Abidjan, 02 P.O. Box 801 Abidjan 02, Côte d’Ivoire
  • 2Research Unit on Hydrobiology, Laboratory of Natural Environments and Biodiversity Conservation, Félix Houphouët-Boigny University, Abidjan, 22 P.O. Box 582 Abidjan 22, Côte d’Ivoire
  • 3Research Unit on Hydrobiology, Laboratory of Natural Environments and Biodiversity Conservation, Félix Houphouët-Boigny University, Abidjan, 22 P.O. Box 582 Abidjan 22, Côte d’Ivoire
  • 4Laboratory of Parasitology and Parasitic Ecology, Department of Zoology, Faculty of Science and Technology, University of Abomey-Calavi, Benin
  • 5Research Unit on Ecology and Biodiversity, Laboratory of Ecology and Sustainable Development, Nangui Abrogoua University, Abidjan, 02 P.O. Box 801 Abidjan 02, Côte d’Ivoire
  • 6Research Unit on Ecology and Biodiversity, Laboratory of Ecology and Sustainable Development, Nangui Abrogoua University, Abidjan, 02 P.O. Box 801 Abidjan 02, Côte d’Ivoire

Int. Res. J. Environment Sci., Volume 14, Issue (3), Pages 34-41, July,22 (2025)

Abstract

The Hybrid fish is a species highly prized by fishermen and local populations in sector IV of the Ebrié lagoon.Due to anthropogenic activities that modify the water quality of the lagoon, this fish may be threatened by pathogenic organisms such as gill parasitic Monogeneans that can affect its condition factor. This study aimed to evaluate the impact of parasites on the body weight of hybrid fish in sector IV of the Ebrié lagoon. The fish were examined from January 2022 to December 2022. Sampled fish were identified and examined for parasites according to standard procedures. Their lengths and weights were measured to determine their condition factors. Six species were identified. Seasonal changes in the rates of infection for all the monogenean species were found with the highest values of mean intensity were observed in the rainy seasons and the lowest one in the long dry season. It also showed that the sex and host size influenced the parasites burden. The study found that all fish examined had a condition factor of less than 1 (K <1). However, there was a significant difference between the condition factors of infested and uninfested fish. Infested fish were skinny than uninfested fish. They were in poor physiological condition.

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