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injoere 2023, 3(1): 27-36 Back to browse issues page
Spatial and temporal distribution pattern and biomass trend of flathead slipper lobster, Thenus orientalis (Lund, 1793) from Gulf of Oman
M.R. Mirzaei *, A. Ajdari, S.P. Woo
Abstract:   (484 Views)
The aim of the present study was to investigate the amount of biomass and Catch Per Unit Area (CPUA) as well as to determine the distribution pattern of flathead slipper lobster, Thenus orientalis as one of the most important and commercial aquatic species in the north coast of the Gulf of Oman. There was an annual monitoring survey during 2009-2019 by using R/V ʻFerdows-1ʼcovering the depths10-100 m which equipped with bottom trawl net. The highest CPUA was recorded in eastern and western region of the study area (45.54 kg/nm2 and 25.40 kg/nm2), although density of species was lower in the central area (Stratum B, C, D). The highest biomass (22.7 tons) and CPUA (52.13 kg/nm2) was found in 10-20 m and 20–30 m depth layer, respectively. The comparison of mean CPUA and biomass in different depth-layers and stratum revealed that the mean CPUA and biomass have a descending trend with increasing of depth.  Results of this study showed that the abundance of this species dramatically decreased over past decade to about 13.3 kg/nm2 in 2019. Therefore, it is necessary to implement a regulatory mechanism to manage the stocks of this commercially valuable species, such as closed fishing season during the breeding and reproduction period, only permitted to use traps for harvesting of lobster, prohibited to take egg-bearing females or juvenile lobsters.
Keywords: Slipper lobster, Catch per unit area, Biomass, Distribution, Thenus orientalis
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Type of Study: Research | Subject: General
Received: 2022/06/25 | Accepted: 2022/12/31 | Published: 2022/12/31
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Mirzaei M, Ajdari A, Woo S. Spatial and temporal distribution pattern and biomass trend of flathead slipper lobster, Thenus orientalis (Lund, 1793) from Gulf of Oman. injoere 2023; 3 (1) :27-36
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Volume 3, Issue 1 (5-2023) Back to browse issues page
International Journal of Environmental Research and Education
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