Relationship of Water Physicochemical Factors with White Thread Fish Holothuria leucospilota (Brandt, 1835) Biomass in the Northern Waters of the Oman Sea
Relationship of Water Physicochemical Factors with White Thread Fish Holothuria leucospilota (Brandt, 1835) Biomass in the Northern Waters of the Oman Sea
Seyed Ahmed Reza Hashemi1, Teymour Aminrad1, Asadullah Ali Muhammad2*, Mastooreh Doustdar3 and Parastoo Mohebi Derakhsh3
ABSTRACT
Current study designed to assess the population characteristics of white threadsfish in northern Oman Sea (Iran) by sampling sea cucumbers at nine sites from March 2018 to March 2019. The sites included Aliabady, Ramin, Beries, Gurdium, Kachoo, Beries plane, Tis, Pasabandar and Pozm. 125 female and 121 male specimens were measured for total length and total weight, with mean ± standard deviation of 28 ± 4 (21 - 33) cm for males and 25 ± 6 (14 - 39) cm for females, and 421 ± 128 (191 - 770) g and 365 ± 231 (116 - 776) g, individually. Overall length and weight were not suggestively changed between the sexes (p ˃ 0.05). Both sexes showed an allometric growth pattern between length and weight. The average estimated number of sea cucumber post Monsoon and per Monsoon was 1.85 million (1.22-2.48) and 1.73 million (1.97-1.49) in the eastern area of Sistan and Baluchestan province, respectively. The total biomass ranged from 601-372 tons, and the harvestable biomass in the two seasons was between 53-90 tons. Contrast worth of phosphate showed substantial differences among diverse stations (P<0.05), while further parameters did not show substantial differences between stations (P>0.05). Multi-layer artificial neural network analysis indicated that two parameters, phosphate and nitrate, had the greatest impact on sea cucumber biomass. To implement a maximum sustainable yield method for this fishery in Iran.
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