Maximizing growth, efficiency, and cost-effectiveness: Evaluating feed strategies for flathead lobsters

IF 2.3 2区农林科学 Q2 FISHERIES Fisheries Research Pub Date : 2025-01-01 Epub Date: 2024-12-23 DOI:10.1016/j.fishres.2024.107249

Rungkan Klahan , Kritsana Krajabthong , Krit Chaiwong

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Abstract

The study aimed to identify the most suitable feed for flathead lobsters (Thenus oreintalis) regarding growth performance and cost-effectiveness. Four treatments were evaluated, including sinking pellet (shrimp feed), green mussel, clam, and mackerel, with each treatment replicated three times. Wild flathead lobsters with sizes ranging from 60 to 70 g were randomly assigned to each treatment group, with five lobsters per replication. The lobsters were fed twice daily with different feeds for 90 days in a recirculating closed system. Results showed that flathead lobsters fed with green mussels had the highest growth performance and utilization while having lower feed costs and total costs than other treatments (P < 0.05). The proximate analysis of flesh and exoskeleton revealed that flathead lobsters fed with sinking pellets had the highest protein percentage. In contrast, those fed with green mussels had the highest lipid and chitin percentage. Moreover, protease activity extracted from the hepatopancreases of flathead lobsters fed with green mussels exhibited the highest activity, while the amylase and lipase activity varied among groups. The chitin structure analysis using SEM, FTIR, and FTIR assays revealed that the feed pattern closely matched the optimal growth and feed utilization, including the B/C ratio, for flathead lobsters cultured in a closed system were green mussels.

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最大化生长，效率和成本效益：评估平头龙虾的饲料策略

本研究旨在从生长性能和成本效益方面确定最适合平头龙虾（Thenus oreintalis）饲料。评价沉丸（虾饲料）、青贻贝、蛤蜊和鲭鱼4种处理，每种处理重复3次。大小从60到70 g的野生平头龙虾随机分配到每个治疗组，每个重复5只龙虾。在一个循环封闭的系统中，每天喂两次不同的饲料，持续90天。结果表明，青贻贝对平头龙虾的生长性能和利用率最高，饲料成本和总成本均低于其他处理（P <； 0.05）。肉和外骨骼的近似分析表明，用下沉颗粒喂养的平头龙虾的蛋白质百分比最高。相比之下，绿贻贝组的脂质和几丁质百分比最高。以青贻贝为食的平头龙虾肝胰脏蛋白酶活性最高，而淀粉酶和脂肪酶活性在各组间存在差异。利用扫描电镜（SEM）、红外光谱（FTIR）和红外光谱（FTIR）对平头龙虾进行了几丁质结构分析，结果表明，封闭养殖系统中平头龙虾的最佳生长和饲料利用率（包括B/C比）为青贻贝。

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来源期刊

Fisheries Research 农林科学-渔业

CiteScore

4.50

自引率

16.70%

发文量

294

审稿时长

15 weeks

期刊介绍： This journal provides an international forum for the publication of papers in the areas of fisheries science, fishing technology, fisheries management and relevant socio-economics. The scope covers fisheries in salt, brackish and freshwater systems, and all aspects of associated ecology, environmental aspects of fisheries, and economics. Both theoretical and practical papers are acceptable, including laboratory and field experimental studies relevant to fisheries. Papers on the conservation of exploitable living resources are welcome. Review and Viewpoint articles are also published. As the specified areas inevitably impinge on and interrelate with each other, the approach of the journal is multidisciplinary, and authors are encouraged to emphasise the relevance of their own work to that of other disciplines. The journal is intended for fisheries scientists, biological oceanographers, gear technologists, economists, managers, administrators, policy makers and legislators.