不同饵料对三疣梭子蟹生长和能量收支的影响

Effects of Different Diets on the Growth and Bioenergetics of Swiimming Crab Portunus Trituberculatus

研究虎鱼肉、鹰爪虾肌肉、杂色蛤肉3种不同饵料投喂体重为(31.01±1.06)g三疣梭子蟹(Portunus trituber-culatus)的生长和能量收支。实验结果表明,饵料种类对三疣梭子蟹的生长以及能量收支都有显著影响。投喂杂色蛤组获得最大特定生长率,其湿重特定生长率、干重特定生长率、蛋白质特定生长率和能量特定生长率分别为2.56%、2.26%、3.48%、0.49%,显著高于虎鱼组(P<0.05),摄食虎鱼、鹰爪虾和杂色蛤时的湿重、干重、蛋白质、能量转化效率均以摄食杂色蛤组为最高,分别为39.82%±2.09%、30.18%±1.86%、33.44%±2.81%、33.88%±3.09%,其中,蛋白质和能量转化效率显著高于其它两组(P<0.05)。方差分析表明饵料种类对三疣梭子蟹能量收支各个组分占摄食能的比例有显著影响(P<0.05)。投喂杂色蛤组生长能占摄食能的比例为29.8%±0.9%,显著高于投喂虎鱼组17.93%±3.5%、鹰爪虾组18.21%±0.5%(P<0.05),投喂杂色蛤组排泄能占摄食能比例为7.32%±0.33%,显著低于投喂虎鱼组12.17%±0.63%、鹰爪虾组13.6%±0.18%(P<0.05)。实验结果表明投喂杂色蛤比虎鱼、鹰爪虾更有利于三疣梭子蟹的生长。

A 40-day growth trial was conducted at 25 ℃ to investigate the effect of different diets on growth and energy budget in swimming crab(Portunus trituberculatus).Swimming crab with the body weight of 31.01 g±1.06 g were fed with fish,shrimp,and clam,respectively.The results showed that specific growth rate(SGR) of wet weight(SGRW),dry matter(SGRDR),protein(SGRP) and energy(SGRE) of the clam group were 2.56%,2.26%,3.48%,0.49%,respectively and significantly higher(P<0.05) than the others.Conversion efficiency of wet weight(FCEW),dry matter(FCEDR),protein(FCEP) and energy(FCEE) at clam group were 39.82%±2.09%,30.18%±1.86%,33.44%±2.81%,33.88%±3.09%,respectively and significantly higher(P<0.05) than the others.Regression analysis showed that the proportions of to various components of the energy budget were significantly affected by diets(P<0.05).The highest proportion of 29.8%±0.9% intake energy for growth and the lowest 7.32% for excretion were found at clam group,compared with the other two groups 17.93%±3.5% and 18.21%±0.5% for growth,12.17%±0.63% and 13.6%±0.18% for excretion.