Bilateral asymmetry in the mass and size of otolith of two cichlid species collected from Lake Ahémé and Porto-Novo Lagoon (Bénin, West Africa)

Authors

  • Laith Jawad Pokeno, Auckland 2471
  • Pierre Gnohossou Département d'Aménagement et Gestion de Ressources Naturelles, Faculté d"Agronomie, University of Parakou, BP 123 Parakou, Republic of Benin
  • Ayoko Géraldine Tossou Département d'Aménagement et Gestion de Ressources Naturelles, Faculté d"Agronomie, University of Parakou, BP 123 Parakou, Republic of Benin
DOI: https://doi.org/10.6018/analesbio.42.02
Keywords: Factores ecológicos; Contaminación acuática; Cichlidae; Sarotherodon melanotheron; Coptodon guineensis

Abstract

Saccular otolith mass asymmetry is studied in two cichlid fish species Sarotherodon melanotheron and Coptodon guineensis collected from Lake Ahémé and Porto-Novo Lagoon, Bénin, West Africa. The length and width of otoliths from adult specimens of both species were used to calculate the fluctuating asymmetry in these two characters. The results show that the level of asymmetry of the otolith width is the most important. The possible cause of the asymmetry in these species has been discussed in relation to different pollutants in the area. Our data show no significant difference, although several studies proved a higher asymmetry in larger (older) individuals.

Downloads

Download data is not yet available.
Published
25-03-2020
How to Cite
Jawad, L., Gnohossou, P., & Tossou, A. G. (2020). Bilateral asymmetry in the mass and size of otolith of two cichlid species collected from Lake Ahémé and Porto-Novo Lagoon (Bénin, West Africa). Anales de Biología, (42), 9–20. https://doi.org/10.6018/analesbio.42.02
Issue
Section
Articles