Publications Scientifiques

[ Article ] Length-weight relationships and condition factors of Mochokidae (Pisces: Teleostei: Siluriformes) from Niger River, Northern Benin

Discipline(s) :
Date de soumission:	24-02-2021
Année de Publication:	2020
Entité/Laboratoire
Document type :	Article

Titre	Length-weight relationships and condition factors of Mochokidae (Pisces: Teleostei: Siluriformes) from Niger River, Northern Benin
Auteurs	ARAME Hamidou [1], ADITE ALPHONSE [2], ADJIBADE Nambil Kayodé [3], SIDI IMOROU Rachad [4], SONON Pejanos Stansilas [5],
Journal:	AQUATIC RESEARCH
Catégorie Journal:	Internationale
Impact factor:	0
Volume Journal:	3
DOI:	https://doi.org/10.3153/AR20007
Resume	In the Niger River in Benin, the fishes of Mochokidae family are of high commercial and economic importance. The current study investigated size structures, length-weight relationships and condi-tion factors of these catfishes in order to evaluate their plumpness. Mochokids were sampled monthly from February 2015 to July 2016 with traps, seine and gillnet. Overall, the fish species showed unimodal, bimodal and tri-modal standard-length distributions. Length-weight models dis-played allometric coefficients (b) varying between 2.236 and 3.380, indicating positive and nega-tive allometric growth with correlation coefficients (r) ranging between 0.87 and 0.99. Condition factors were moderate to low and varied from K= 0.409 for Synodontis frontosus to K= 7.276 for Synodontis sorex that showed a higher value K= 31.13 in aquatic vegetation. Major threats were the use of chemical fertilizers and pesticides for adjacent agriculture, the retrieval of water for agriculture and domestic uses, the invasion of floating plants, the introduction of exotic fish species and overfishing. These data constitute valuable fisheries documentation that will contribute to con-servation, valorization and sustainable exploitation of Mochokid fishes in Niger River in Benin.
Mots clés	Allometric growth, Conservation, Synodontis schall, Sustainable exploitation
Pages	72 - 84
Fichier	(PDF)

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