Volume 17, Issue 1 (Spring 2025)
3 2025, 17(1): 14-29 |
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Badali R, Paighambari Y, Zare P, Abbaspour Naderi R. Survey of cephalopods caught by bottom trawl in the contiguous zone of Sistan and Baluchestan's waters with assessment of its uncertainty: Gowater, Pasabandar, and Beris fishing grounds. 3 2025; 17 (1) :14-29
URL: http://jmb.ahvaz.iau.ir/article-1-1005-en.html
URL: http://jmb.ahvaz.iau.ir/article-1-1005-en.html
Fishing and Exploitation Department, College of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
Abstract: (79 Views)
In some cases, despite the presence of cephalopods in the catch composition of fishing fleets, not much information about their stocks is available, even they are discarded. Therefore, in the present study, to identify and monitor cephalopods of the catch composition bottom trawl fleets in the east of the Gulf of Oman more precisely, sampling for the catch composition of the cephalopod of the bottom trawl fleet of Sistan and Baluchistan province was carried out in the summer-autumn of 2020. A field study was carried out on the fishing grounds of Gowater, Pasabandar, and Beris in the eastern region of the Gulf of Oman. Also, aquatic density data were analyzed with the bootstrap statistical method. Eight species Acanthosepion pharaonis, Acanthosepion stelliferum, Rhombosepion omani, Rhombosepion prashadi, Sepia saya, Uroteuthis (Photololigo) duvaucelii, Uroteuthis (Photololigo) edulis and Amphioctopus marginatus were identified. Acanthosepion pharaonis and Uroteuthis (Photololigo) duvaucelii species were about 50% of the total weight and number of the catch, respectively. Only 0.109 and 0.134 percent of the total number and weight of the cephalopods catch were non-commercially discard catch, and others were retained catch - including the juveniles of commercial species. After removing the bias from the average cephalopod catch in each haul, the corrected average with normal, basic, percentile, and bias-corrected and accelerated confidence intervals were calculated. Although most of the obtained averages from resampling were slightly different from the primary observed values, the new confidence intervals sometimes showed vast changes. It should be mentioned that the discarding of cephalopods, especially commercial species, as well as the catching of their juveniles, should be avoided.
Type of Study: Research |
Subject:
Fisheries
Received: 2024/01/9 | Accepted: 2025/04/22 | Published: 2025/04/22
Received: 2024/01/9 | Accepted: 2025/04/22 | Published: 2025/04/22
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