Abstract
In order to contribute to the improvement of aquaculture production, reproductive parameters of three populations of Oreochromis niloticus of Cameroon were studied between March and May 2019 at the research station of Foumban. At this effect, a total of 81 parents (27 males and 51 females with respective weight 124 ± 6g and 144 ± 5g) coming from three hydrogeographicals origins (Niger, Sanaga and IRAD Station) were randomly distributed in triplicate in nine concrete tanks of a m² each with a sex ratio of one male for two females (1♂/2♀). Throughout the test, six females carrying eggs in the oral cavity were collected in each population and 45 days after the start of the trial, all the offspring were collected and the adults sacrificed. At the end of experiment, the IRAD population presented highest significant values (p ≤ 0.05) regardless of the performances considered. The values of the gonado-somatic and the gonado-metric characteristics significantly lower (p ≤ 0.05) were obtained in Niger population (GSR = 0.04 ± 0.02, GSI = 0.05 ± 0.03 and GMR=0.19 ± 0.08;GMI= 0.24±0.07). Considering sex, males presented the lowest significant values (p ≤ 0.05) for all the characteristics studied (GSR = 0.04±0.01, GSI = 0.04±0.01 and GMR= 0.23±0.08;GMI= 0.29±0.09).
Highlights
Human societies are facing a huge challenge of food supply enough rich in protein and that of providing livelihoods to an estimated population of over nine billion by mid-21st century [1]
It is to evaluate the effect of the origins of population on reproductive performances, gonado-somatic and gonado-metric characteristics
Reproductive Performance According to the Origin of the Populations
Summary
Human societies are facing a huge challenge of food supply enough rich in protein and that of providing livelihoods to an estimated population of over nine billion by mid-21st century [1]. Among all species of tilapia, Oreochromis niloticus commonly known as Nile tilapia is the main species used in aquaculture in inland waters of Africa [5]. It is the major source of income for African fish farmers [6, 7]. The aim of this work is to contribute to the improvement of the Nile Tilapia production through the mastery of the reproductive performance of different populations of Cameroon. It is to evaluate the effect of the origins of population on reproductive performances, gonado-somatic and gonado-metric characteristics
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