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Investigating some biometric parameters, type of growth and ‎food ‎items of Alepes djedaba in Makkoran coast

Document Type : Article

Authors

1 Department of Fisheries, Faculty of ‎Marin Sceinces, Chabahar Maritime ‎University, Chabahar, Iran‎

2 ‎Aquatic Ecology, Information ‎Technology Management, Faculty of ‎Natural Resources, University of ‎Tehran, Karaj, Iran‎

10.30473/eab.2024.69150.1924

Abstract

The present study was carried out with the aim of determining the biometric factors, length and weight relationship, frequency percentage of length and weight groups, and identification of food groups consumed in Alepes djedaba fish caught from the coast of Makkoran. For this purpose, 120 samples of Alepes djedaba were collected from the three catchment areas of Ramin, Haft Tir and Tis in Makkoran coast located in Sistan and Baluochistan province seasonally from autumn 2019 to summer 2020. The prepared fishes were caught by traditional fishing boats. After the fishes were prepared and transferred to the laboratory, the biometric characteristics, including the total length and body weight, were measured and the pattern of growth was determined. In the next step, in order to identify the food items, the contents of the digestive system were separated and identified. The results of the present study showed that the Alepes djedaba caught in the Makkoran coast in different seasons have different length and weight ranges. The average total length and weight of the fish were 28.00±4.68 cm and 311.18±12.00 gr, respectively. Based on the results, the value of b in the length-weight relationship to determine the growth pattern did not show a significant difference with the number 3 (p>0.05), which indicates isometric growth in this species. Food items identified in the stomach contents of this species included fish and crustaceans. According to the food items identified in the digestive system of the studied fish, it seems that this species is an advanced predator that is at the top of the food chain. Therefore, despite the differences in the composition of the population of food items in each environment, this fish feeds on a relatively constant diet including various types of fish and small crustaceans. From the obtained results, it can be stated that this species is carnivorous and its growth is isometric, and in different seasons of the year, different length and weight groups of this fish are caught in the Makkoran coast.

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References
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Experimental animal Biology
Volume 12, Issue 3 - Serial Number 47
March 2024
Pages 53-63
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