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首页> 外文期刊>The Journal of Experimental Biology >Income breeding and temperature-induced plasticity in reproductive traits in lizards
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Income breeding and temperature-induced plasticity in reproductive traits in lizards

机译：蜥蜴繁殖性状的收入繁殖和温度诱导的可塑性

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摘要

We used the northern grass lizard Takydromus septentrionalis as a model animal to examine the energy allocation strategy and whether body temperature can affect maternal reproductive traits in lizards. We maintained adult females collected from the field soon after winter dormancy under three thermal conditions (24.0 +/- 1.0 degrees C, 28.0 +/- 1.0 degrees C and 32.0 +/- 1.0 degrees C) throughout the subsequent reproductive season, and then recorded their energy intake, digestive efficiency, body size and mass changes, and reproductive parameters. Manipulation of body temperature in reproducing females affected energy intake and several maternal reproductive characteristics. Females allocated energy to reproduction following the fulfillment of energetic requirements for metabolism and growth. The reduced energy availability for reproduction constrained females at low or high body temperatures to produce fewer and smaller eggs per season but had no role in influencing the number of eggs produced in single reproductive bouts. Females used currently acquired energy to fuel reproduction, and this strategy did not shift seasonally from the first to subsequent clutches. Our study supports the idea that the use of currently acquired energy for reproduction may be more widespread in ectotherms than thought before, and shows for the first time that egg size is thermally plastic in T. septentrionalis, where eggs produced in single reproductive bouts are believed to be well optimized for size.
机译：我们使用北方草蜥蜴Takydromus septentrionalis作为模型动物来研究能量分配策略以及体温是否会影响蜥蜴的母体生殖性状。我们在冬季休眠后不久在整个繁殖季节的三个高温条件下（24.0 +/- 1.0摄氏度，28.0 +/- 1.0摄氏度和32.0 +/- 1.0摄氏度）保持从田间采集的成年雌性，然后进行记录它们的能量摄入，消化效率，体重和体重变化以及生殖参数。对繁殖雌性动物进行体温调节会影响能量摄入和一些母体生殖特征。在满足新陈代谢和生长的能量需求后，雌性将能量分配给生殖。生殖能量供应的减少限制了雌性在较低或较高的体温下每个季节生产越来越少的卵，但对单次生殖周期产卵的数量没有影响。雌性使用当前获得的能量来繁殖，这种策略并没有从最初的抓紧季节转变到随后的抓紧。我们的研究支持这样一种想法，即利用当前获得的能量进行生殖活动可能比以前想象的更为广泛，并且首次证明了鸡蛋中的鸡蛋大小是可塑性的，而据信该鸡蛋是在单个生殖周期中产生的。进行尺寸优化。

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