Estimation of growth parameters and mortality rate of Upeneus sulphureus (Cuvier, 1829) in the Persian Gulf ecosystem
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A. Vahabnezhad *, S.A. Taghavimotlagh, A. Salarpouri |
Iranian Fisheries Science Research Institute (IFSRI), Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran |
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Abstract: (774 Views) |
Population parameters were estimated for goatfish (Upeneus sulphureus, Cuvier, 1829) as a small size and abundant species in the Persian Gulf ecosystem. A method of Tropfish R package based on length frequencies analysis was used. A total of 520 fish samples were taken monthly from landing stations in the coastal area of Iranian Waters in the Persian Gulf (Bushehr coasts) from January 2017 to December 2018. The length (FL) of the captured fishes varied from 8.5 to 17 cm with an average (±SD) of 11.20 (±2.24) cm.
The values of the von Bertalanffy growth function fit length frequency data for U. sulphureus (combined sex) were estimated, as k = 1.2 per year, L∞ =19.43 cm (LF). Total, natural and fishing mortality calculated, as Z=3.74 per year, M=2.21 per year and F=1.53 per year, respectively. The exploitation ratio (E) was estimated at 0.4.
The length-weight relationships of both sexes was estimated as, Log  |