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 Resources.
Age and Growth of the Nile Perch, Lates Niloticus L. in Lake Victoria, Uganda
Abstract:
This research determined age and growth of Nile perch (Lates
niloticus) from Lake Victoria commercial catches using
transverse-sectioned sagittal otoliths. Marginal increment
analysis of the otoliths indicated bimodal deposition of annuli
over a 12-month period, with the highest opaque zone deposition
corresponding to the two seasonal peaks of rain (i.e. March to
May and September to November) characteristic of this
equatorial region. A difference in growth rate between male
and female Nile perch was observed with the females having
faster growth rates and reaching a large size at older ages than
their male counterparts.
Cette recherche a déterminé l’âge et la croissance du poisson
qu’on appelle la perche du Nil (Lates niloticus) se trouvant
dans le lac Victoria. Ils sont captures pour de raisons
commerciales en utilisant une section d’otolithes sagittaux
transversaux. L’analyse de croissance marginale des otolithes
a montré de dépôt bimodal des anneaux sur une période d’audelà
de 12 mois, avec une zone plus opaque de déposition
correspondant aux deux pics saisonniers de pluie (c’est-à-dire
de mars à mai et septembre à novembre), caractéristique de
cette région équatoriale. Une différence de taux de croissance
entre la perche du Nil mâle et femelle a été observée avec les
femmes ayant des taux de croissance plus rapides et peuvent
atteindre une grande taille chez les personnes âgées que leurs
homologues masculins.
Language:
English
Extended abstracts submitted under Harnessing Aquaculture and Fisheries Resources
Date of publication:
2012
Country:
Region Focus:
East Africa
Collection:
RUFORUM Conferences and Workshops
Agris Subject Categories:
Agrovoc terms:
Additional keywords:
Licence conditions:
Open Access
Access restriction:
Form:
Printed resource
Publisher:
Notes:
