Biological Parameters of the Red Pandora (Pagellus bellottii Steindachner, 1882) in Soumbedioune, Senegal, West Africa

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By Research Archive Posted on Jan 3, 2023
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Waly Ndiaye, Alassane Sarr, Patrick Diédhiou American Journal of Life Sciences (Science Publishing Group) 2022
English Senegal
Abstract
New information on the reproductive biology of Pagellus bellottii (Steindachner, 1882) a Sparid fish in Senegalese waters is provided in this study. Little aspects on the reproductive biology of this fish are reported in Senegal, West Africa. The objective of the study is to examine the length-weight relationship, the condition factor and the reproductive parameters of P. bellottii from the Senegalese waters. A total of 360 specimens (males = 197 and females = 163) bought from fishermen were used for the study. Specimens were collected monthly (thirty individuals per month) from October 2019 to September 2020 from Soumbedioune of Western part of Dakar, Senegal. Each individual was measured with an ichthyometer and weighed with a precision balance. For dissected individuals, sex was determined by macroscopic observation of the gonads. The gonads were extracted to calculate the Gonadosomatic Index. The length-weight relationship gave a negative allometric growth for both sexes. The value of “k” being greater than 1; the species was in good condition in this environment. The sex ratio (1:0.82) was favourable to males. The reproductive period was from March to June with a spawning peak in April for both sexes. Males and females had size at first sexual maturity at 178- and 180-mm total length, respectively. Males matured at smaller sizes than females. The data obtained in this study on some aspects of the reproductive biology of P. bellottii will be essential for better management of fish stocks in Senegal and in the sub-region.
Length-Weight Relationship, Reproductive Biology, Pagellus bellottii, Soumbedioune, Senegal

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New information on the reproductive biology of Pagellus bellottii (Steindachner, 1882) a Sparid fish in Senegalese waters is provided in this study. Little aspects on the reproductive biology of this fish are reported in Senegal, West Africa. The objective of the study is to examine the length-weight relationship, the condition factor and the reproductive parameters of P. bellottii from the Senegalese waters. A total of 360 specimens (males = 197 and females = 163) bought from fishermen were used for the study. Specimens were collected monthly (thirty individuals per month) from October 2019 to September 2020 from Soumbedioune of Western part of Dakar, Senegal. Each individual was measured with an ichthyometer and weighed with a precision balance. For dissected individuals, sex was determined by macroscopic observation of the gonads. The gonads were extracted to calculate the Gonadosomatic Index. The length-weight relationship gave a negative allometric growth for both sexes. The value of “k” being greater than 1; the species was in good condition in this environment. The sex ratio (1:0.82) was favourable to males. The reproductive period was from March to June with a spawning peak in April for both sexes. Males and females had size at first sexual maturity at 178- and 180-mm total length, respectively. Males matured at smaller sizes than females. The data obtained in this study on some aspects of the reproductive biology of P. bellottii will be essential for better management of fish stocks in Senegal and in the sub-region.

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