Growth and Conditions Appraisal of Atropus atropos (Carangidae) in the Bay of Bengal
Growth and Conditions Appraisal of Atropus atropos (Carangidae) in the Bay of Bengal
Nur-E-Farjana Ilah1, Md. Joynal Abedin2, Esmout Jahan Alice1, Taiba Akter Laboni1, Mst. Shahinur Khatun1, Most. Shakila Sarmin1, Md. Ashekur Rahman1, Obaidur Rahman1, Md. Akhtarul Islam1, Muhammad Ali Fardoush Siddquy3 and Md. Yeamin Hossain1*
ABSTRACT
This study aims to provide insights into the growth pattern and conditions of Atropus atropos in the Bay of Bengal, Bangladesh. The lack of information on this species in the region has made it crucial to carry out such research for better understanding about its growth and health in this particular habitat. A total 100 individuals were collected from fishers catch during November 2021 to October 2022 by using traditional fishing gears such as trawl and gill nets (mesh size: 2-3 cm). Data showed that TL was found to be between 15 and 21 cm and the BW remained as 46 and 136 g. All LWRs had r2 values below 0.945 and were significant (P<0.001). The estimated allometric coefficient (b) suggested the combined sexes showed isometric growth (b~3). The statistical analysis conducted in this study revealed a highly significant LLR (p<0.001) with an r2 value exceeding 0.944. The form factor (a3.0) was found as 0.0155, while the size at first sexual maturity (Lm) was determined as 12.36 cm TL. The natural mortality (Mw) was calculated as 1.57 y-1. A major connection between KR and BW for this species, indicating that KR was an exceptionally significant in revealing the health of A. atropos. Thereafter, a high condition rating (KF, KA, and KR) indicates that the species is in short and deep shape. This study found that the habitat was in a state of equilibrium and the mean WR indicated that there was no significant deviation from the expected value of 100 for A. atropos. Consequently, information gathered from the present study would be impactful for managing this fishery in the Bay of Bengal, Bangladesh, along with the surroundings.
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