Variation in growth, condition, physiological and prey-predator status of smoothbelly sardinella, Amblygaster leiogaster (Valenciennes, 1847) in the Bay of Bengal

IF 2.1 4区环境科学与生态学 Q3 ECOLOGY

Regional Studies in Marine Science Pub Date : 2025-03-10 DOI:10.1016/j.rsma.2025.104110

Md. Ashekur Rahman, Most. Shakila Sarmin, Md. Akhtarul Islam, Md. Yeamin Hossain

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Abstract

This study estimated the first report on temporal and seasonal variation in growth patterns, condition factors (Fulton’s, K_F; Relative, K_R), physiological and prey-predator status of Amblygaster leiogaster (Valenciennes, 1847) from the Bay of Bengal, Bangladesh through sampling from January to December 2020. Collected individuals (1337) were measured with an accuracy of 0.01 g for body weight (BW) and 0.1 cm for total length (TL), respectively. The growth pattern was evaluated through studying the length-weight relationships. The study recorded new maximum length (30.50 cm TL) and weight (142.56 g) for this species. This species revealed an overall negative allometric (b = 2.61) growth. Temporal variation indicated a positive allometric growth in September, October and November. However, an isometric growth pattern (b = 3.08) was found in post-monsoon while other season demonstrated negative allometric growth. The overall K_F was 0.50–1.20, and K_R was 0.66–1.35 for A. leiogaster. The overall K_F showed a strong correlation with TL, while the K_R demonstrated correlations with both TL and BW. Most of the fatty fish found in winter (51.43 %) with a minimum number of lean fish (21.14 %) while maximum ideal fish was in post-monsoon (55.77 %). The W_R stated that the Bay of Bengal had been considered stable for A. leiogaster. The findings provided valuable insights on the stock health of A. leiogaster that assist in developing efficient management in the Bay of Bengal and other habitats.

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孟加拉湾滑滑鱼（Amblygaster leiogaster, 1847）的生长、状况、生理和捕食状态的变化

这项研究估计了第一份关于生长模式、条件因素的时间和季节变化的报告(Fulton 's， KF；通过2020年1月至12月取样，研究了孟加拉国孟加拉湾Amblygaster leogaster （Valenciennes, 1847）的相对（Relative， KR）、生理和捕食状态。采集个体1337只，体重（BW）和体长（TL）测量精度分别为0.01 g和0.1 cm。通过研究长度-权重关系来评价生长模式。该研究记录了该物种新的最大长度（30.50 cm TL）和重量（142.56 g）。整体呈负异速生长（b = 2.61）。9月、10月和11月呈异速生长。季风后为等长生长模式（b = 3.08），其他季节为负异速生长模式。总KF值为0.50 ~ 1.20，旱鹅的KF值为0.66 ~ 1.35。总体KF与TL有较强的相关性，而KR与TL和BW均有相关性。肥肉鱼以冬季为主要季节（51.43 %），瘦肉鱼最少（21.14 %），最理想的季节为季风后（55.77 %）。世界野生动物保护区表示，孟加拉湾被认为是一种稳定的a.l eiogaster。这些研究结果提供了宝贵的见解，有助于在孟加拉湾和其他栖息地制定有效的管理措施。

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来源期刊

Regional Studies in Marine Science Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics

CiteScore

3.90

自引率

4.80%

发文量

336

审稿时长

69 days

期刊介绍： REGIONAL STUDIES IN MARINE SCIENCE will publish scientifically sound papers on regional aspects of maritime and marine resources in estuaries, coastal zones, continental shelf, the seas and oceans.