Correlation between water physicochemical parameters and the amount of catch per unit effort (CPUE) of Babylonia spiral snail (Babylonia spirata Linnaeus, 1758) in the northern waters of Oman Sea, Sistan and Baluchistan province

Document Type : Original Article

Authors

1 Offshore Fisheries Research Center, National Institute of Fisheries Research Sciences, Agricultural Research, Education and Extension Organization, Chabahar, Iran.

2 offshore fisheries research center of chabahar

3 National Institute of Fisheries Research Sciences, Agricultural Research, Education and Extension Organization, Tehran, Iran.

Abstract

Babylonia spirata is one of the important commercial oyster species in the world. The ecological basis of the habitats of this mollusk in the coastal waters and in the areas of the continental plateau is a significant help to fishermen and operators. Therefore, to identify the ecological characteristics of the Babylon Sea snail habitat in the northern waters of the Oman Sea, water sampling was done to determine temperature, pH, salinity, dissolved oxygen, nutrients, turbidity, and sediment, the total organic matter and the type of substrate, Babylon species to determine CPUE was done monthly from September 2021 to May 2022. The results showed that the average water temperature during the study period was 27.79°C in Konarak, 26.99 in Pezam, and 28.5 in Pasabandar and Bris. The average salinity in Kanarak, Pozem, Bris, and Pasbandar stations were 39.33, 26.99, 39.25, and 39.25 g/L, turbidity 5.48, 2.5, 7.25 and 7.25 FTU, acidity 8.25, 8.22, 8.18 and 8.18, DO 6.6, 7.06, 6.97 and 6.97 mg/l, nitrate 1.35, 1.16, 1.11 and 1.11 mg/l, nitrite 0.04, 0.02, 0.055 and 0.055 mg/l, ammonia 0.05, 0.19, 0.01 and 0.01 mg/liter,  phosphate 0.37, 0.23, 0.25 and 0.25mg/liter, and the organic matter 0.64, 0.52, 1.67 and 1.67%, respectively. The results revealed that nutrients play an important role in the density of Babylon in this region. With the increase of nutrients, the density of Babylon increases with a sharp peak and reached the maximum in October and November, and after that, with the decrease of food, the density decreases. Based on multiple linear regression analysis, the nitrite was highly related to the amount of catch per unit effort of the Babylon Sea snail.

Keywords

References

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Aquaculture Sciences
Volume 11, Issue 1
March 2023
Pages 85-104

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