Individual variability within a population and the eventual repeatability across time and space may provide stability in a population facing environmental changes, by affecting individuals differently. Thus, the variability and repeatability of behaviours, habitats used, niches and migratory pathways could play an important role. Trindade petrels (Pterodroma arminjoniana) are threatened seabirds that breed year round on Trindade Island in the South Atlantic Ocean, migrate to North Atlantic Ocean in the non-breeding periods, and use wide oceanic areas. This study investigated the timing, at-sea distribution, and trophic niche throughout the annual cycle of the austral fall/winter breeding group of Trindade petrel and examined consistency in distribution and trophic niche used by the Trindade petrel at the individual level, in different breeding seasons, using geolocator tracking and stable isotope analysis. Results demonstrated that petrels breed annually, maintaining their breeding schedules. Petrels share a common, vast oligotrophic oceanic area during both breeding and non-breeding periods inside the South Atlantic and North Atlantic Subtropical Gyres, respectively. Two migratory patterns were identified and used repeatedly by individuals. Although petrels overlapped at-sea distributions in consecutive breeding seasons, consistency in parameters tested was not found. Breeding in two schedules along the year, in addition to the use of different migratory pathways and flexibility in their isotopic niche can be an advantage for Trindade petrel population to cope with environmental changes. Causes and consequences of variable niche and pathways used, and the existence of consistency and variability among birds breeding later on the year remain poorly-known.

种群内的个体变异性以及最终跨时间和空间的可重复性可以通过对个体的不同影响来为面临环境变化的种群提供稳定性。因此，行为、所使用的栖息地、生态位和迁徙途径的可变性和可重复性可以发挥重要作用。Trindade海燕（Pterodroma arminjoniana) 是受威胁的海鸟，它们常年在南大西洋的特林达德岛繁殖，在非繁殖期迁徙到北大西洋，并使用广阔的海洋区域。本研究调查了 Trindade 海燕南方秋季/冬季繁殖群在整个年度周期中的时间、海上分布和营养生态位，并检查了 Trindade 海燕在不同繁殖中在个体水平上使用的分布和营养生态位的一致性季节，使用地理定位器跟踪和稳定同位素分析。结果表明海燕每年繁殖一次，维持其繁殖时间表。海燕分别在南大西洋和北大西洋亚热带环流内的繁殖和非繁殖期间共享一个共同的、广阔的贫营养海洋区域。两种迁徙模式被确定并被个人反复使用。尽管海燕在连续的繁殖季节在海上分布重叠，但未发现测试参数的一致性。除了使用不同的迁徙途径和同位素生态位的灵活性外，一年中按两个时间表进行繁殖可以成为特林达海燕种群应对环境变化的优势。使用可变生态位和途径的原因和后果，以及在今年晚些时候繁殖的鸟类之间存在的一致性和变异性仍然鲜为人知。除了使用不同的迁移途径外，它们的同位素生态位的灵活性也可以成为特林达海燕种群应对环境变化的优势。使用可变生态位和途径的原因和后果，以及在今年晚些时候繁殖的鸟类之间存在的一致性和变异性仍然鲜为人知。除了使用不同的迁移途径外，它们的同位素生态位的灵活性也可以成为特林达海燕种群应对环境变化的优势。使用可变生态位和途径的原因和后果，以及在今年晚些时候繁殖的鸟类之间存在的一致性和变异性仍然鲜为人知。