Back to Search
Start Over
Population parameters and exploitation rate ofSarotherodon galilaeus galilaeus(Cichlidae) in Lakes Doukon and Togbadji, Benin
- Source :
- African Journal of Aquatic Science. 41:151-160
- Publication Year :
- 2016
- Publisher :
- National Inquiry Services Center (NISC), 2016.
-
Abstract
- Growth, mortality, recruitment and relative yield per recruit of Sarotherodon galilaeus galilaeus from Lakes Doukon and Togbadji were studied. Data on total length, total weight and sex were recorded on a monthly basis between January and December 2013 for S. g. galilaeus captured by local fishers. The estimated asymptotic lengths L∞ were 26.2 and 23.6 cm for Lakes Doukon and Togbadji, respectively, while the growth rate K was 0.73 in Lake Doukon and 0.87 in Lake Togbadji. Estimates of fishing mortality, 0.27 and 0.47 y−1 for Doukon and Togbadji, respectively, were low relative to natural mortality, 1.51 and 1.74 y−1, respectively. Sizes at first sexual maturity were 12.8 and 13.2 cm for females and males, respectively, in Lake Doukon, and 11.5 and 12.4 cm for females and males, respectively, in Lake Togbadji. The size at first capture was estimated at 13.3 and 12.7 cm for Lakes Doukon and Togbadji, respectively, which, in the light of the size at maturity estimates, indicates that fish spawn at least onc...
- Subjects :
- 0106 biological sciences
education.field_of_study
biology
010604 marine biology & hydrobiology
Fishing
Population
04 agricultural and veterinary sciences
Aquatic Science
biology.organism_classification
01 natural sciences
Spawn (biology)
West africa
Fishery
Relative yield
040102 fisheries
0401 agriculture, forestry, and fisheries
Sarotherodon
Sexual maturity
education
Ecology, Evolution, Behavior and Systematics
Subjects
Details
- ISSN :
- 17279364 and 16085914
- Volume :
- 41
- Database :
- OpenAIRE
- Journal :
- African Journal of Aquatic Science
- Accession number :
- edsair.doi...........becf0411e14143663d77db100dfef682