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首页> 外文期刊>Zoological Science >Is Reproductive Effort Environmentally or Energetically Controlled? The Case of the Danube Crested Newt (Triturus dobrogicus)
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Is Reproductive Effort Environmentally or Energetically Controlled? The Case of the Danube Crested Newt (Triturus dobrogicus)

机译：生殖努力是否受到环境或能源的控制？多瑙河rest（Triturus dobrogicus）的案例

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摘要

Reproductive strategies have evolved from a series of trade-offs between cost and timing of reproduction. We tested whether the reproductive effort of female Danube crested newts, Triturus dobrogicus, was environmentally or energetically constrained. We collected females migrating towards the water and kept them separately, with males. Deposited eggs were collected daily during the experiment. More eggs were deposited by older females and by females starting to reproduce earlier. Batches of eggs from females depositing more eggs had a lower hatching success, suggesting decreased viability. Oviposition lasted on average 22.7 days. Female newts showed no loss of weight during this period. At the end of the egg deposition period we injected a subset of females with hormones that triggered the deposition of additional eggs. This suggests that egg deposition in Danube crested newts is environmentally constrained, as females stopped oviposition despite having mature eggs in their ovaries.
机译：生殖策略已从成本与繁殖时间之间的一系列权衡中发展而来。我们测试了雌性多瑙河顶new（Triturus dobrogicus）的繁殖力是否受到环境或能量的限制。我们收集了移向水面的雌性，并将它们与雄性分开存放。实验期间每天收集沉积的卵。较大的雌性和早期开始繁殖的雌性产下更多的卵。来自雌性的分批产卵更多的卵孵化成功率较低，表明生存力下降。产卵平均持续22.7天。雌new在此期间未见体重减轻。在产卵期结束时，我们给一部分女性注射了激素，这些激素触发了其他卵的沉积。这表明多瑙河凤头new中的卵沉积受到环境的限制，因为尽管卵巢中有成熟卵，但雌性仍停止产卵。

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