Breeding Seasonality and Size at first Maturity of Synodontis njassae of Southeast arm of Lake Malawi

Abstract: 
Breeding seasonality and size-at-first maturity of Synodontis njassae in southeast arm of Lakes Malawi was studied. It was found that males mature earlier than females (10.6cm and 11cm, respectively). The size at 50% maturity for both sexes was 12- 13cm. This species has small eggs, with an average fecundity of 3985 ± 39.690. The species has two breeding seasons. The first spawning occurs in February to March (GSI falls from 4.09 to 2.37) and the second spawning occurs from September to November (GSI falling from 3.5 to 2).
La saisonnalité de reproduction et la taille à la première maturité de Synodontis njassae dans le bras Sud-Est du Lac Malawi ont été étudiées. Il a été constaté que les mâles mûrissent plus tôt que les femelles (10,6 cm et 11cm, respectivement). La taille à 50% de maturité pour les deux sexes était de 12-13cm. Cette espèce a de petits oeufs, avec une fécondité moyenne de 3985 ± 39.690. L’espèce a deux saisons de reproduction. La première ponte a lieu de Février à Mars (GSI chute de 4,09 à 2,37) et la seconde ponte se produit de Septembre à Novembre (GSI chutant de 3,5 à 2).
Language: 
Extended abstracts submitted under Harnessing Aquaculture and Fisheries
Date of publication: 
2012
Country: 
Region Focus: 
Southern Africa
Collection: 
RUFORUM Conferences and Workshops
Licence conditions: 
Open Access
Access restriction: 
Form: 
Printed resource
Publisher: 
Notes: 

The 2012 RUFORUM Biennial Conference is the third in the series. The main objective of the Biennial conferences is to provide a platform for agricultural research for development stakeholders in Africa and beyond to actively exchange findings and experiences, while at the same time learning lessons towards improving performance of the agricultural sector and ultimately people’s livelihoods. The biennial conference is RUFORUM’s most comprehensive meeting for the diversity of stakeholers in agriculture. It is especially dedicated to graduate students and their supervisors, grantees in RUFORUM member universities and alumni. It is a platform for peer review, quality control, mentorship, networking and shared learning. The third Biennial Conference was attended by 657 participants.This record contains an extended abstract accepted under the theme of Harnessing Aquaculture and Fisheries