Variation in the intestinal morphology and biometric characteristics of Sardinella aurita and Sardinella maderensis at James Town in Ghana

Ghana journal of science Pub Date : 2024-02-19 DOI:10.4314/gjs.v64i2.6

C. Ayisi, E. H. Alhassan, W. Awuku

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Abstract

This study investigated the biology of Sardinella aurita (flat Sardinella) and S. maderensis (round Sardinella) at James Town in Ghana. A total of 40 round and flat Sardinella samples each were evaluated each month. The results showed significant difference between round and flat Sardinella with respect to intestinal weight (p=0.020), liver weight (p=0.002) and body weight (p=0.005). Intestinal weight of the round and flat Sardinella ranged from 86.5-113 g and 79-92 g respectively. Intestinal weight of round Sardinella was significantly higher than the flat Sardinella. Liver weight of flat Sardinella was significantly lower than the liver weight of round Sardinella. Mean intestinal content of round and flat Sardinella were 46.1±16.30 and 9.65±0.33 respectively. Relative gut mass for round Sardinella ranged between 0.022 and 0.120 whilst that of flat Sardinella ranged between 0.020 and 0.933. Relative gut length was similar for flat and round Sardinella. Mean Zhilers Index for flat and round Sardinella were 0.0752±0.004 and 0.091±0.005 respectively. Mean gonadosomatic index, Hepatosomatic index and Relative content mass recorded for flat Sardinella were 5.735±0.495, 0.346±0.034 and 0.006±0.000 respectively. This work recommend further study comparing catches from artisanal and semi-industrial vessels to obtain a broader knowledge of the growth and maturation of the species. Key words: relative gut length, zhilers index, intestinal content, body weight, liver weight

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加纳詹姆斯镇沙丁鱼和马德林沙丁鱼肠道形态和生物计量特征的变化

本研究调查了加纳詹姆斯镇的扁沙丁鱼（Sardinella aurita）和圆沙丁鱼（S. maderensis）的生物学特性。每个月分别对 40 个圆沙丁鱼和扁沙丁鱼样本进行评估。结果表明，圆沙丁鱼和扁沙丁鱼在肠重（p=0.020）、肝重（p=0.002）和体重（p=0.005）方面存在明显差异。圆形沙丁鱼和扁形沙丁鱼的肠重分别为 86.5-113 克和 79-92 克。圆形沙丁鱼的肠重明显高于扁形沙丁鱼。扁平沙丁鱼的肝脏重量明显低于圆形沙丁鱼。圆沙丁鱼和扁沙丁鱼的平均肠含量分别为 46.1±16.30 和 9.65±0.33。圆沙丁鱼的相对肠道质量介于 0.022 和 0.120 之间，而扁沙丁鱼的相对肠道质量介于 0.020 和 0.933 之间。扁沙丁鱼和圆沙丁鱼的相对肠道长度相似。扁沙丁鱼和圆沙丁鱼的平均志留指数分别为 0.0752±0.004 和 0.091±0.005。扁沙丁鱼的平均性腺指数、肝脏指数和相对含量分别为 5.735±0.495、0.346±0.034 和 0.006±0.000。这项工作建议进一步研究比较个体渔船和半工业化渔船的渔获量，以便更广泛地了解该物种的生长和成熟情况。关键词：相对肠长、日勒指数、肠道含量、体重、肝重

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Ghana journal of science

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