Vol. 2, Issue 2 (2017)
Population structure and some aspects of biology of Pseudotolithus senegalensis and Pseudotolithus typus within the coastal waters of Liberia
Author(s): Austin Saye Wehye, Patrick K Ofori-Danson, Angela Manekuor Lamptey
Abstract: The study evaluated the population structure and biology of two sciaenids within Liberia’s coastal waters. A total of 177 and 152 samples of P. senegalensis and P. typus respectively were collected from two landing sites in two coastal counties of Liberia from July, 2016 to December, 2016. Each individual fish specimens was measured for standard length, weight and analysed using FiSAT II software and Excel Analysis Toolpak. Spawning periods of the two fish species were determined following the monthly variation of the mean gonadosomatic index. Fish condition factor for both genders of P. senegalensis and P. typus was influenced by the sea surface temperature (SST). Based on the monthly GSI’s variation, the two species spawned doing the hydrological seasons. The length-weight relationship of both species shows negative allometric growth. There were dominants of males to females for the two assessed species. From the results urgent management interventions in form of close seasons are needed to safeguard these commercially important fish species from possible stress in the future to avert natural mortality dominants.
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