Mazumder Sabuj Kanti, Das Simon Kumar, Bakar Yosni, Ghaffar Mazlan Abd
School of Environmental and Natural Resource Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi Selangor, D.E., Malaysia.
Marine Ecosystem Research Center, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, D.E., Malaysia.
J Zhejiang Univ Sci B. 2016 Aug;17(8):580-90. doi: 10.1631/jzus.B1500251.
In this study we aimed to analyze the effects of water temperature and diet on the length-weight relationship and condition of juvenile Malabar blood snapper Lutjanus malabaricus over a 30-d experimental period. The experiment was conducted in the laboratory using a flow-through-sea-water system. The fish were subjected to four different temperatures (22, 26, 30, and 34 °C) and two diets (commercial pellet and natural shrimp). Fish were fed twice daily. L. malabaricus exhibited negative allometric growth (b<3) at the beginning of the experiment (Day 0) at all temperatures and both diets except for 22 °C fed with shrimp, which showed isometric growth (b=3). Conversely, at the end of the experiment (Day 30) fish showed isometric growth (b=3) at 30 °C fed with the pellet diet, indicating that the shape of the fish did not change with increasing weight and length, and a positive allometric growth (b>3) at 30 °C fed with shrimp diet, which indicated that fish weight increases faster than their length. The rest of the temperatures represented negative allometric growth (b<3) on both diet, meaning that fish became lighter with increasing size. The condition factors in the initial and final measurements were greater than 1, indicating the state of health of the fish, except for those fed on a pellet diet at 34 °C. However, the best condition was obtained at 30 °C on both diets. Nevertheless, diets did not have a significant effect on growth and condition of juvenile L. malabaricus. The data obtained from this study suggested culturing L. malabaricus at 30 °C and feeding on the pellet or shrimp diet, which will optimize the overall production and condition of this commercially important fish species.
在本研究中，我们旨在分析水温与饲料对未成年马拉巴血鲷（Lutjanus malabaricus）体长 - 体重关系及健康状况的影响，实验为期30天。实验在实验室中采用流水海水系统进行。鱼被置于四种不同温度（22、26、30和34℃）和两种饲料（商业颗粒饲料和天然虾）条件下。鱼每天喂食两次。在实验开始时（第0天），除了以虾为食且水温为22℃时呈现等速生长（b = 3）外，所有温度和两种饲料条件下的马拉巴血鲷均呈现负异速生长（b < 3）。相反，在实验结束时（第30天），以颗粒饲料为食且水温为30℃时鱼呈现等速生长（b = 3），这表明鱼的形状不会随着体重和体长的增加而改变；而以虾为食且水温为30℃时呈现正异速生长（b > 3），这表明鱼体重的增加快于体长。其余温度条件下，两种饲料喂养的鱼均呈现负异速生长（b < 3），这意味着随着体型增大鱼变得更轻。除了在34℃以颗粒饲料喂养的鱼之外，初始和最终测量的健康状况因子均大于1，表明鱼的健康状态良好。然而，两种饲料在30℃时均达到最佳健康状况。尽管如此，饲料对未成年马拉巴血鲷的生长和健康状况没有显著影响。本研究获得的数据表明，在30℃下养殖马拉巴血鲷并投喂颗粒饲料或虾饲料，将优化这种具有商业重要性的鱼类的整体产量和健康状况。
