Nest maintenance and stone theft in the Chinstrap penguin (Pygoscelis antarctica)
Nest maintenance and stone theft in the Chinstrap penguin (Pygoscelis antarctica)
复制标题
帽带企鹅（Pygoscelis antarctica）的巢穴维护和石头盗窃
作者：
J. Moreno;J. Bustamante;J. Viñuela
帽带企鹅（Pygoscelis antarctica）从孵化中出来后，会从地上收集石头或从其他巢穴中偷走石头，并将其纳入自己的巢穴中。南设得兰群岛迪塞普申岛 Vapor Col Chinstrap 企鹅群落中的一个大型亚群中的 100 个巢穴样本，测量了孵化缓解后石头收集行为的变化、巢穴防御强度和巢穴重量。与雌性相比，雄性会收集更多、更大的石头，偷走更多的石头，并且在针对潜在小偷的巢穴防御方面更具侵略性。女性遭受石头盗窃的程度高于男性。巢穴的重量在 20 天内发生了变化。初始巢大小与巢重量的变化呈负相关。雄性收集和盗窃石头的强度与巢重量的增加和最终达到的巢重量呈正相关，而雄性和雌性的巢防御强度与初始和最终巢重量呈正相关。暴风雪后的洪水影响了 31% 的巢穴，并造成高达 14% 的蛋/幼体损失。被淹没的巢穴明显小于未被淹没的巢穴。结果表明，帽带企鹅的巢穴维护行为和盗窃石头有助于提高巢穴质量，从而提高繁殖成功率。
Chinstrap penguins, Pygoscelis antarctica, after being relieved from incubation, collect stones from the ground or steal them from other nests and incorporate them into their own nests. The variation in stone-collecting behaviour after incubation reliefs, nest defence intensity and nest weights were measured in a sample of 100 nests in a large subcolony sited in the Vapour Col Chinstrap penguin colony on Deception Island, South Shetland Islands. Males collected more and larger stones, stole more stones and were more aggressive in nest defence towards potential thieves than females. Females suffered stone theft to a greater degree than males. Nests changed in weight during a period of 20 days. Initial nest size was negatively correlated with change in nest weight. The intensity of stone collection and theft by males was positively correlated with the increase in nest weight and with the final nest weight attained, while nest defence intensity by males and females was positively correlated with initial and final nest weight. Flooding after a snow storm affected 31% of nests and caused the loss of up to 14% of eggs/hatchlings. Flooded nests were significantly smaller than non-flooded nests. Results indicate that nest maintenance behaviour and stone theft in Chinstrap penguins serve to improve nest quality and thus enhance reproductive success.