USE OF BODY STORES IN SHOREBIRDS AFTER ARRIVAL ON HIGH-ARCTIC BREEDING GROUNDS
USE OF BODY STORES IN SHOREBIRDS AFTER ARRIVAL ON HIGH-ARCTIC BREEDING GROUNDS
复制标题
滨鸟到达高纬度繁殖地后身体储存的使用
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
Keith A. Hobson
中科院分区：
文献类型：
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作者：
R. I. Guy Morrison;Keith A. Hobson
摘要蛋成分的稳定同位素分析可以阐明内源和外源营养物质对蛋形成的贡献，在鸟类下蛋前从一个同位素生物群转移到另一个同位素生物群的情况下，例如在加拿大高北极地区的红结(Calidris Canutus Islandica)和鲁迪转石(Ruddy Turnstone)的筑巢中。这些种群在冬季和向北迁徙期间使用近岸海洋生物栖息地，但转向在北极陆地C-3栖息地觅食和繁殖。当这些鸟到达加拿大努纳武特的阿勒特时，它们红细胞的稳定碳(δ13C)和氮(δ15N)同位素值与近岸海洋饮食的预期值一致。在这些鸟转向陆地饮食后，这些值以负指数的方式衰减，直到它们达到与当地陆地C-3饮食一致的渐近值。季节晚些时候下蛋的成分，包括脱脂蛋黄、蛋白、蛋黄脂和蛋白脂，通常显示出与来自外部(即本地)营养来源的路线一致的同位素值，这支持了北极海鸟主要是收入而不是资本繁殖者的观点。然而，早期孵化的卵富含13C和15N，这表明有一些剩余的海洋营养物质可供繁殖。北极高地滨鸟内源储存转移到卵中的程度可能取决于年份和气候条件。
Abstract Stable-isotope analyses of egg components can illuminate the contributions of endogenous and exogenous nutrients to egg formation in cases where birds move from one isotopic biome to another just before egg-laying, as in Red Knots (Calidris canutus islandica) and Ruddy Turnstones (Arenaria interpres interpres) nesting in the northeastern Canadian High Arctic. Those populations use inshore marine habitats during the winter and northward migration periods, but switch to feeding and breeding in terrestrial C-3 habitats in the Arctic. Upon the birds' arrival at Alert, Nunavut, Canada, stable carbon (δ13C) and nitrogen (δ15N) isotope values for their red blood cells were consistent with those expected from an inshore marine diet. After the birds switched to a terrestrial diet, those values decayed in a negative exponential fashion until they reached asymptotic values consistent with a local terrestrial C-3 diet. Components of eggs laid later in the season, including lipid-free yolk, albumen, yolk lipid, and albumen lipid, generally showed isotope values consistent with routing from exogenous (i.e. local) nutrient sources, which supports the notion that High Arctic shorebirds are primarily income and not capital breeders. However, eggs in earliest clutches were enriched in 13C and 15N, which suggests that some residual marine nutrients were available for reproduction. The extent to which endogenous stores are transferred to eggs in High Arctic shorebirds may depend on year and climatic conditions.
DOI：
10.1073/pnas.90.24.11446
发表时间：
1993-12-15
影响因子：
11.1
作者：
SCHWABL, H
通讯作者：
SCHWABL, H