Publication: Bilateral asymmetry in the mass and size of otolith of twocichlid species collected from Lake Ahémé and Porto-NovoLagoon (Bénin, West Africa)
Authors
Jawad, Laith ; Gnohossou, Pierre ; Tossou, Ayoko Géraldine
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Publisher
Murcia: Servicio de Publicaciones de la Universidad de Murcia
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DOI
http://dx.doi.org/10.6018/analesbio.42.02
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info:eu-repo/semantics/article
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Abstract
Se estudia la asimetría de la masa del otolito sacular en dos espe-cies de peces cíclidos Sarotherodon melanotheron y Coptodonguineensis recolectadas del lago Ahémé y la laguna Porto-Novo,Benín, África occidental. La longitud y el ancho de los otolitos deespecímenes adultos de ambas especies se usaron para calcularla asimetría fluctuante en estos dos caracteres. Los resultadosmuestran que el nivel de asimetría del ancho del otolito es el másimportante. La posible causa de la asimetría en estas especies seha discutido en relación con diferentes contaminantes en el área.Nuestros datos no muestran diferencias significativas, aunque va-rios estudios demostraron una asimetría más alta en individuosmás grandes (de más edad).
Abstract: Saccular otolith mass asymmetry is studied in two cichlid fish spe-cies Sarotherodon melanotheron and Coptodon guineensis collec-ted from Lake Ahémé and Porto-Novo Lagoon, Bénin, West Africa.The length and width of otoliths from adult specimens of both spe-cies were used to calculate the fluctuating asymmetry in these twocharacters. The results show that the level of asymmetry of the oto-lith width is the most important. The possible cause of the asym-metry in these species has been discussed in relation to differentpollutants in the area. Our data show no significant difference, al-though several studies proved a higher asymmetry in larger (older)individuals.Key words:Ecological factors; Water pollution; Cichlidae;Sarotherodon melanotheron; Coptodon guineensis.
Abstract: Saccular otolith mass asymmetry is studied in two cichlid fish spe-cies Sarotherodon melanotheron and Coptodon guineensis collec-ted from Lake Ahémé and Porto-Novo Lagoon, Bénin, West Africa.The length and width of otoliths from adult specimens of both spe-cies were used to calculate the fluctuating asymmetry in these twocharacters. The results show that the level of asymmetry of the oto-lith width is the most important. The possible cause of the asym-metry in these species has been discussed in relation to differentpollutants in the area. Our data show no significant difference, al-though several studies proved a higher asymmetry in larger (older)individuals.Key words:Ecological factors; Water pollution; Cichlidae;Sarotherodon melanotheron; Coptodon guineensis.
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Citation
Anales de Biología, Vol. 42 (2020)
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