摘要
In this study we aimed to analyze the effects of water temperature and diet on the length-weight rela- tionship 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 ℃） and two diets （commercial pellet and natural shrimp）. Fish were fed twice daily. L. malabancus exhibited negative allometric growth （b〈3） at the beginning of the experiment （Day 0） at all temperatures and both diets except for 22 ℃ 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 ℃ 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 ℃ 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 ℃. However, the best condition was obtained at 30 ℃ on both diets. Nev- ertheless, 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 ℃ and feeding on the pellet or shrimp diet, which will optimize the overall production and condition of this commercially important fish species.
目的:分析水温度和喂食对摩拉吧笛鲷体长体重关系和肥满度的影响。创新点:本研究采用条件可控的流通式海水系统,对摩拉吧笛鲷的体长体重关系和肥满度进行研究。方法:本研究使用流通式海水系统在实验室中实施,选取4种不同温度(22、26、30和34°C)和2种饮食条件(商业颗粒和自然虾米),每天喂食2次,比较鲷鱼体长体重关系和肥满度差异。结论:结果表明,摩拉吧笛鲷的最好饲养条件是30°C,而喂食种类对摩拉吧笛鲷的生长和肥满度的影响没有显著差异。本研究提供了温度和饮食对摩拉吧笛鲷体长体重关系和肥满度影响的基本信息,可用于该物种的生理状态评估。
基金
supported by the Ministry of Science Technology and Innovation Malaysia(MOSTI)(No.04-01-02-SF1208)
