Diouf K.D., Goudiaby K.D., Ndione M.D., Diadhiou H.D., Ndiaye P., Jouffre Didier. (2017). Reproductive parameters of a catfish (Arius latiscutatus Günther, 1864) inside and outside the Bamboung Marine Protected Area (Saloum Delta), Senegal [résumé]. In :
Brehmer Patrice (ed.), Ba B. (ed.), Kraus G. (ed.). International conference ICAWA 2016 : extended book of abstract : the AWA project : ecosystem approach to the management of fisheries and the marine environment in West African waters. Dakar : SRFC/CSRP ; IRD, p. 113. ICAWA : International Conference AWA, 3., Dakar (SEN), 2016/12/13-15. ISBN 978-2-9553602-0-5.
Titre du document
Reproductive parameters of a catfish (Arius latiscutatus Günther, 1864) inside and outside the Bamboung Marine Protected Area (Saloum Delta), Senegal [résumé]
Année de publication
2017
Type de document
Colloque
Auteurs
Diouf K.D., Goudiaby K.D., Ndione M.D., Diadhiou H.D., Ndiaye P., Jouffre Didier
In
Brehmer Patrice (ed.), Ba B. (ed.), Kraus G. (ed.), International conference ICAWA 2016 : extended book of abstract : the AWA project : ecosystem approach to the management of fisheries and the marine environment in West African waters
Source
Dakar : SRFC/CSRP ; IRD, 2017,
p. 113 ISBN 978-2-9553602-0-5
Colloque
ICAWA : International Conference AWA, 3., Dakar (SEN), 2016/12/13-15
The reproduction of Arius latiscutatus (Günther, 1864) was studied both inside and outside of the Bamboung marine protected area (MPA) (Saloum Delta) in Senegal, from individuals collected monthly from April 2015 to March 2016. The reproductive parameters were quantified from the macroscopic examination of the gonads and from the counting and measurement of the oocytes. The monthly variation of the condition factor was similar at both sites. The strongest condition coefficients were observed during the two major seasons (cold and warm) and the lowest during the transition period (warm - cold). A. latiscutatus had only one breeding season from March to July. Size at first sexual maturity varied by gender and site: 400 mm for females and 448 mm for males inside the MPA, and 419 mm for females and 375 mm for males outside. Absolute fecundity was 29 ± 14 oocytes and relative fecundity 0.024 ± 0.007 oocytes per gram within the MPA. Outside, absolute fecundity was 22 ± 10 oocytes and relative fecundity 0.027 ± 0.005 oocytes per gram. The MPA appeared to be the privileged spawning area of the species, an area where reproductive activity would be more intense and fertility higher. Additional analyzes based on a larger sample and integrating other parameters such as age estimation, growth and diet, will allow to complement these initial results and to specify the impact of the reserve on the biological parameters of the species but also to have a global knowledge of its life traits.
Plan de classement
Sciences du milieu [021]
;
Ressources halieutiques [040]
Localisation
Fonds IRD [F A010071832]
Identifiant IRD
fdi:010072140
