Reproductive biology of a riverine cyprinid, Labeo umbratus (Teleostei: Cyprinidae), in small South African reservoirs

The reproductive and recruitment characteristics of moggel, Labeo umbratus, populations were examined in four small South African reservoirs. Reproduction, characterised by an extended spawning season, high fecundity, short incubation time and rapid larval development, appears to be ideally suited t...

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Published in:African journal of aquatic science 2005, Vol.30 (2), p.147-155
Main Authors: Potts, W.M, Booth, A.J, Hecht, T, Andrew, T.G. (Rhodes Univ., Grahamstown (South Africa). Dept. of Ichthyology and Fisheries Science)
Format: Article
Language:English
Subjects:
AFRIQUE DU SUD
EMBALSES
ENVIRONMENTAL FACTORS
FACTEUR DU MILIEU
FACTORES AMBIENTALES
FECUNDITY
FERTILIDAD
FERTILITE
FERTILITY
Freshwater
LABEO
Labeo umbratus
MOGGEL
PERFORMANCE DE REPRODUCTION
REPRODUCTIVE PERFORMANCE
REPRODUCTIVIDAD
RESERVOIR D'EAU
SMALL WATER BODIES
SOUTH AFRICA
SUDAFRICA
WATER RESERVOIRS
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container_issue 2
container_start_page 147
container_title African journal of aquatic science
container_volume 30
creator Potts, W.M
Booth, A.J
Hecht, T
Andrew, T.G. (Rhodes Univ., Grahamstown (South Africa). Dept. of Ichthyology and Fisheries Science)
description The reproductive and recruitment characteristics of moggel, Labeo umbratus, populations were examined in four small South African reservoirs. Reproduction, characterised by an extended spawning season, high fecundity, short incubation time and rapid larval development, appears to be ideally suited to the highly variable environment of small reservoirs. Evidence suggested that L. umbratus spawns in the reservoirs. In two reservoirs where samples were conducted monthly, GSI (gonado-somatic index) was positively correlated with both water temperature and day length, whilst the CPUE (catch per unit effort) of juveniles was not related to any environmental variable. The success of moggel spawning appeared to increase when there was early spring and consistent summer rainfall.
doi_str_mv 10.2989/16085910509503849
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subjects AFRIQUE DU SUD
EMBALSES
ENVIRONMENTAL FACTORS
FACTEUR DU MILIEU
FACTORES AMBIENTALES
FECUNDITY
FERTILIDAD
FERTILITE
FERTILITY
Freshwater
LABEO
Labeo umbratus
MOGGEL
PERFORMANCE DE REPRODUCTION
REPRODUCTIVE PERFORMANCE
REPRODUCTIVIDAD
RESERVOIR D'EAU
SMALL WATER BODIES
SOUTH AFRICA
SUDAFRICA
WATER RESERVOIRS
title Reproductive biology of a riverine cyprinid, Labeo umbratus (Teleostei: Cyprinidae), in small South African reservoirs
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