Population Dynamics of Shark Species in the Coast Of Ghana, West Africa

This study aimed at assessing the growth and mortality parameters of Prionace gluaca Sphyrna lewini shark species from coast Ghana. Data was taken for nine (9) months April 2021 to December 2021. The length data analyzed estimation population using FiSAT II tool. From results, estimated asymptotic (L∞) rate (K) P. glauca S. were 396.4 cm 0.27 yr–1 349.1 0.24 respectively, indicating that these exhibited slow growing characteristics, evinced by a longevity approximately 11 – 12 years. first capture (Lc50) 128.6 169.0 cm. maturity (Lm50) 179.74 160.4 respectively. By comparing Lc50 Lm50, it implies individuals vulnerable fishing gears before having chance mature even spawn once. total (Z), natural (M), (F) exploitation rates 0.82 , 0.22 0.60 0.73 0.76 yr–1, 0.21 0.55 0.72, suggests activities are main cause decline in abundance species. (E > 0.5) revealed overexploited Ghana’s marine waters. Based on findings, is recommended effort be reduced through appropriate measures relevant authorities.
 Vol. 9, No. 3, 2022: 353-365