Regulation of complex behavioural transitions: migration to breeding
Regulation of complex behavioural transitions: migration to breeding
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复杂行为转变的调节：迁移到繁殖
DOI：
10.1016/j.anbehav.2016.09.015
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发表时间：
2017
期刊：
影响因子：
2.5
通讯作者：
J. Wingfield
中科院分区：
文献类型：
--
作者：
M. Ramenofsky;J. Wingfield
迁徙的进化结合了在高纬度或高海拔地区利用短暂资源进行繁殖的选择优势，以及在有充足资源的遥远地点越冬以促进生存的优势。在不同地点之间的迁徙涉及到行为的变化，特别是从迁徙到筑巢的过渡，或者在秋天，过渡到越冬阶段。我们在这里关注春天的过渡。由于迁徙和筑巢的开始是相互排斥的事件，从社会性、嗜食性和高度流动性的状态过渡到领土性和配对关系涉及复杂的行为变化。在北极地区，春季的天气是不可预测的，这又增加了迁徙/繁殖过渡的复杂性。然而，北极短暂的夏季要求鸣禽在条件可能仍然不利的情况下到达繁殖地，从而推迟筑巢，直到条件改善。这需要灵活和协调的迁徙行为，以便在天气恶化时能够离开，或者在条件允许的情况下，在几个小时内成为领土，吸引配偶并开始筑巢。甘贝尔白冠麻雀（zoonotrichia leucophrys gambelii）的生殖发育的神经内分泌调节在整个春季迁徙过程中进行，雄性和雌性在到达筑巢地时都已经成熟，但最终卵巢成熟导致排卵和生殖行为受到抑制。是什么“刹车”了筑巢的开始？我们关注的是肾上腺皮质对急性应激的反应，这种反应在到达时大大增加，特别是在雄性中，可能是为了使对恶劣天气的行为反应更加灵活。最近的证据表明，下丘脑肽，促性腺激素抑制激素（GnIH）可能在不抑制生殖系统功能发展的情况下，为筑巢的开始提供了刹车。实验研究表明，大脑中GnIH基因沉默会增加筑巢时的鸣叫和生殖行为。因此，我们认为糖皮质激素和GnIH在从春季迁徙到筑巢的过渡中起着重要的调节作用。
The evolution of migration combines the selective advantages of breeding with ephemeral resources at high latitude or altitude with the benefits of overwintering at distant sites with adequate resources to promote survival. Migration between sites involves changes in behaviour, especially the transition from migration to nesting, or in autumn, the transition to wintering stage. We focus here on the vernal transition. Because migration and onset of nesting are mutually exclusive events, transition from a social, hyperphagic and highly mobile state to territoriality and pair bonding involves complex behavioural changes. In Arctic regions, weather in spring is unpredictable adding another dimension of complexity to the migration/breeding transition. Nevertheless, the brief Arctic summer requires that songbirds arrive on the breeding grounds while conditions may still be unfavourable, thus delaying nesting until conditions ameliorate. This requires flexibility and coordination of migration behaviour to be able to leave if weather deteriorates, or to become territorial, attract a mate and begin nesting within hours when conditions permit. In Gambel's white-crowned sparrows,Zonotrichia leucophrys gambelii, neuroendocrine regulation of reproductive development progresses throughout vernal migration so that males and females are mature when they arrive on the nesting grounds, but final ovarian maturation leading to ovulation and reproductive behaviours is suppressed. What provides the ‘brake’ to the onset of nesting? We focus on the adrenocortical response to acute stress that is greatly increased at arrival, especially in males, probably to enable flexibility in behavioural responses to severe weather. More recent evidence suggests that a hypothalamic peptide, gonadotropin-inhibiting hormone (GnIH) may provide the brake for the onset of nesting without suppressing development of a functional reproductive system. Experimental investigations show that gene silencing of GnIH in the brain increases singing and reproductive behaviours accompanying the onset of nesting. Thus we suggest that corticosteroids and GnIH play important regulatory roles specifically at the transition from vernal migration to the onset of nesting.
季节和迁徙改变了北极候鸟白冠麻雀 (Zonotrichia leucophrys gambelii) 捕捉和处理时皮质酮的反应。
DOI：
10.1016/s0742-8413(96)00208-3
发表时间：
1997
期刊：
Comparative biochemistry and physiology. Part C, Pharmacology, toxicology & endocrinology.
影响因子：
--
作者：
Romero,LM;Ramenofsky,M;Wingfield,JC
通讯作者：
Wingfield,JC
影响因子：
4
作者：
Osugi, T;Ukena, K;Tsutsui, K
通讯作者：
Tsutsui, K