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在26.2～28.4℃水温条件下,研究了饥饿对中华绒螯蟹(Eriocheirsinensis)仔蟹的形态、行为、存活及体重损失的影响,同时确定了仔Ⅱ的营养饱和储存点(PRS)和不可恢复点(PNR)。结果表明:饥饿胁迫下中华绒螯蟹仔Ⅰ、仔Ⅱ、仔Ⅲ的初次死亡时间(T1)分别为8.0、14.0和20.3d,50%死亡时间(T50)分别为11.4、16.0和25.5d,100%死亡时间(T100)分别为15.0、22.0和32.3d,耐饥饿能力为仔Ⅲ>仔Ⅱ>仔Ⅰ;饥饿期间中华绒螯蟹体内水分含量持续升高,干重量降低显著,干重损失速率也随时间延长逐渐减小;先饱食后饥饿的给饵模式中仔Ⅱ蜕皮率随初始饱食时间延长而升高,50%个体完成蜕皮所需饱食时间(PRS50)为2.10d,各处理组仔Ⅱ的蜕皮周期与持续饱食组均无显著差异(P>0.05),但只有饱食3d以上才能达到持续饱食饲养蟹的增重率;先饥饿后饱食的给饵模式中,仔Ⅱ的蜕皮率随着初始饥饿时间的延长而下降,其中仔Ⅱ50%不能蜕皮的初始饥饿时间(PNR50)和100%不能蜕皮的初始饥饿时间(PNR100)分别为10d和14d,并且蜕皮周期相对延长,延长时间约等于初始饥饿时间,不存在额外的摄食时间来弥补饥饿期间损失的能量,各处理组蜕皮后仔蟹与对照组体重无显著差异(P>0.05)。
The effects of starvation on the morphological, behavioral, survival and weight loss of Eriocheirina sinensis crabs were studied under water temperature of 26.2-28.4 ℃. At the same time, the nutrient saturation storage points (PRS) and non-recoverable Point (PNR). The results showed that the first death (T1), the second death (T1) and the third death (T50) of E. sinensis Ⅰ, Ⅱ and Ⅲ were 8.0, 14.0 and 20.3 days, 100% of the time of death (T100) were 15.0,22.0 and 32.3d respectively, and the ability of resistance to starvation was Aberdeen II> Aberdeen I. During the starvation period, the water content of Eriocheir sinensis continued to increase, the dry weight decreased significantly and the dry weight loss The rate of larvae decreased gradually with the time increasing. The molting rate of Zouzai Ⅱ increased with the initial satiation time after feeding, but the PRS50 of 50% There was no significant difference in the molting cycle between the treatment group and the continuous feeding group (P> 0.05), but the rate of gaining weight of the fed crabs could be reached only after three days , The molting rate of AbaloneⅡdecreased with the increase of initial starvation time, of which, the initial hunger time (PNR50) of50% and the initial hunger time of100% (PNR100) of50% molting were10d and14d, respectively, The cycle is relatively extended, the extension time is approximately equal to the initial starvation time, there is no additional feeding time Compensate for the loss of energy during starvation after ecdysone treatment groups no significant differences (P> 0.05) and the control group larval weight.