Reproductive biology and histological characteristics of female little tunny Euthynnus alletteratus (Rafinesque, 1810) caught on continental shelf of Côte d’Ivoire

Authors

  • Laurent Bahou Laurent BAHOU, Département Ressources Aquatiques Vivantes, Célestin ATSÉ BOUA, Département Aquaculture, Centre de Recherches Océanologiques, Rue des pêcheurs, Treichville, BP V18 Abidjan, Côte d’Ivoire
  • Marie-Anne d’Almeida Marie-Anne d’ALMEIDA, Laboratoire de Biologie Cellulaire, Tidiani KONÉ, Laboratoire d’Hydrobiologie, UFR Biosciences, 22 BP 582 Abidjan 22, Université Félix HOUPHOUET-BOIGNY, Côte d’Ivoire
  • Tidiani Koné Marie-Anne d’ALMEIDA, Laboratoire de Biologie Cellulaire, Tidiani KONÉ, Laboratoire d’Hydrobiologie, UFR Biosciences, 22 BP 582 Abidjan 22, Université Félix HOUPHOUET-BOIGNY, Côte d’Ivoire
  • Célestin Atsé Boua Laurent BAHOU, Département Ressources Aquatiques Vivantes, Célestin ATSÉ BOUA, Département Aquaculture, Centre de Recherches Océanologiques, Rue des pêcheurs, Treichville, BP V18 Abidjan, Côte d’Ivoire
  • Guillaume Dadi Séripka Inspection Générale, Ministère des Ressources Animales et Halieutiques, 01 BP V 19 Abidjan 01, Côte d’Ivoire

Keywords:

Absolute fecundity, Gonado-somatic index, Hepato-somatic index, Little tunny, Somatic condition

Abstract

Some females little tunny (n=395) caught in gillnets and measuring in size from 35 to 76 cm FL (centimetre Fork Length) were sampled from January to December 2004 to study some biological features (length-weight relationship, size at first sexual maturity, eggs variation in diameter, gonado-somatic index, hepato-somatic index, somatic condition, and fecundity) along with histological characteristics of the reproduction process in this species. Female E. alletteratus reached maturity at 42.54 cm FL. Maturity stage distribution and gonado-somatic index (GSI) revealed that spawning period extended from May to October, with a peak value of GSI attained in August. There is a direct correlation between GSI and hepato-somatic index (HSI), and an inverse correlation of these factors to the somatic condition (Kc). The absolute fecundity has linear relationship with the weights of specimens and weights of ovaries. Yet, curvilinear relationship was found between the absolute fecundity and sizes of females. Eggs count in ovaries at spawning (IV) and post spawning (V) stages revealed bimodal size classes, while ovaries at maturing stage III showed unique modal-egg-frequency distribution.

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Published

2016-01-19

How to Cite

Bahou, L. ., d’Almeida, M.-A. ., Koné, T. ., Atsé Boua, C. ., & Dadi Séripka, G. . (2016). Reproductive biology and histological characteristics of female little tunny Euthynnus alletteratus (Rafinesque, 1810) caught on continental shelf of Côte d’Ivoire. Scientific Journal of Biological Sciences, 5(1), 88-102. Retrieved from https://www.sjournals.com/index.php/sjbs/article/view/417

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Vol. 5 No. 1 (2016): January

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Original Article

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Copyright (c) 2020 Laurent Bahou, Marie-Anne d’Almeida, Tidiani Koné, Célestin Atsé Boua, Guillaume Dadi Séripka

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