Reproduction of Oreochromis niloticus
Document source: http://www.fishbase.se/Reproduction/FishReproSummary.php?ID=2&GenusName=Oreochromis&SpeciesName=niloticus+niloticus&fc=349&StockCode=1
 
Main Ref. Trewavas, E., 1983
Mode dioecism
Fertilization external
Mating type polygyny
Spawning frequency no obvious seasonal peak
Spawning aggregation Ref.  
Batch spawner Yes.   Ref.  Trewavas, E., 1983
Reproductive guild bearers
external brooders
Parental Care maternal
Description of life cycle and mating behavior Sexual maturity is reached at 3-6 months depending on temperature, reaching about 30 g. Reproduction occurs only when temperatures are over 20°C. Several yearly spawnings every 30 days. Females incubate eggs inside their mouths (approximately for a week) where larvae hatch and remain until the vitellus is reabsorved. Egg size 1.5 mm, larval length at hatching 4 mm. Spawns in firm sand in water from 0.6 to 2 m deep of lakes (Ref. 2) and inshore waters (Ref. 55624). Males set up and defend territory which are visited by the females. Courtship lasts several hours. A single male probably fertilises the eggs of more than one female (Ref. 55624). Eggs are shed in batches in shallow nest and fertilized by male. Each batch of eggs is picked up into oral cavity by female. Females solely involved in broodcare. Female carries up to 200 eggs in her mouth where the larvae hatch and remain until after the yolk-sac is absorbed.
Search for more references on reproduction Scirus
(e.g. 9948)
( e.g. cephalopods )
Entered by Acosta, Belen on 10.19.90
Modified by Luna, Susan M. on 06.07.16
Checked by Torres, Armi G. on 03.20.95
Comments & Corrections
Sign our Guest Book
Back to Search


Publish in our journal partner Acta Ichthyologica et Piscatoria the results of your primary research on fishes about growth, weight-length relationships, reproduction (maturity, fecundity, spawning), food and diet composition, introductions and range extensions for faster subsequent entry in (2017 impact factor: 0.708).

cfm script by eagbayani, 21/08/01 ,  php script by rolavides, 11/02/08 ,  last modified by mbactong, 09/06/17