Adnan Amin-Safwan, Gamburud Lawrencia Casey, Mohd Affendi Izzah-Syafiah, Mohd Pauzi Mardhiyyah, Mahsol Hairul Hafiz, Muhammad Taufik, Manan Hidayah, Naimullah Muhammad, Ismail Che-Zulkifli Che, Harman Muhd-Farouk, Syafaat Muhammad Nur, Musa Nadirah, Ma Hongyu, Ikhwanuddin Mhd
Department of Applied Sciences and Agriculture, Tunku Abdul Rahman University of Management and Technology, Johor Branch, Jalan Segamat/Labis, 85000 Segamat, Johor, Malaysia.
Faculty of Fisheries and Food Sciences, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia.
Trop Life Sci Res. 2024 Mar;35(1):197-217. doi: 10.21315/tlsr2024.35.1.11. Epub 2024 Mar 30.
Female has become more popular in Malaysia as emerging species mainly for soft-shell crabs and crab fattening (to increase weight, size and ovary maturation so that they can be sold at a higher price). To harvest crabs in soft-shell conditions and fattening, both conditions depend mostly on moulting events. To accelerate the moulting process, the manipulation of water parameter (salinity) and autotomy of the limb is commonly used. In this study, the evaluation of the moulting performances of full limb autotomy (the removal of all the appendages except for the swimming legs) and non-ablated (control) using immature cultured in three different salinity treatments (10 ppt, 20 ppt and 30 ppt) were performed. Results indicate there were significant differences between mud crab's culture duration, BW increments, growth performances and feeding efficiency with salinity. However, CW increments and survival indicate no significant effect with salinity. Meanwhile, limb autotomy proved to affect the culture duration, BW increments, survival and feeding efficiency of . The study concludes that both salinity and limb autotomy play significant roles in moulting performances of , with 20 ppt being the best salinity to stimulate moulting and development compared with the other two treatments (10 ppt and 30 ppt). Limb autotomy also indicates promising results as this technique proved to accelerate the moulting duration of with a 100% moulting percentage within 30 days. Therefore, the outcome would certainly benefit in the aquaculture production of this species of commercial importance mainly on soft-shell crabs production and also emerge as crabs fattening technique.
雌性在马来西亚越来越受欢迎，成为新兴的主要用于软壳蟹和蟹育肥（增加体重、尺寸和卵巢成熟度，以便能以更高价格出售）的品种。为了收获处于软壳状态和育肥的螃蟹，这两种情况大多取决于蜕壳事件。为了加速蜕壳过程，通常采用操控水参数（盐度）和肢体自切的方法。在本研究中，对在三种不同盐度处理（10 ppt、20 ppt和30 ppt）下养殖的未成熟个体进行全肢体自切（除游泳腿外切除所有附肢）和未切除（对照）的蜕壳性能评估。结果表明，青蟹的养殖持续时间、体重增加、生长性能和摄食效率在不同盐度之间存在显著差异。然而，壳宽增加和存活率表明盐度对其没有显著影响。同时，肢体自切被证明会影响青蟹的养殖持续时间、体重增加、存活率和摄食效率。研究得出结论，盐度和肢体自切在青蟹的蜕壳性能中都起着重要作用，与其他两种处理（10 ppt和30 ppt）相比，20 ppt是刺激青蟹蜕壳和发育的最佳盐度。肢体自切也显示出有前景的结果，因为该技术被证明能加速青蟹的蜕壳持续时间，在30天内蜕壳率达100%。因此，这一结果肯定会有利于这种具有商业重要性的蟹类的水产养殖生产，主要体现在软壳蟹生产方面，并且也可作为蟹育肥技术。
