Inter-colony movements, at-sea behaviour and foraging in an immature seabird: results from GPS-PPT tracking, radio-tracking and stable isotope analysis
Inter-colony movements, at-sea behaviour and foraging in an immature seabird: results from GPS-PPT tracking, radio-tracking and stable isotope analysis
复制标题
未成熟海鸟的群体间运动、海上行为和觅食:GPS-PPT 跟踪、无线电跟踪和稳定同位素分析的结果
DOI:
10.1007/s00227-010-1563-9
复制
发表时间:
2010
期刊:
影响因子:
2.4
通讯作者:
Votier S
中科院分区:
文献类型:
--
作者:
Votier S
Seabird populations contain large numbers of immatures––in some instances comprising >50% of the fully grown adults in the population. These birds are significant components of marine food webs and may contribute to compensatory recruitment and dispersal, but remain severely understudied. Here, we use GPS-PTTs, radio-tracking and analysis of stable carbon (δ13C) and nitrogen (δ15N) isotopes to investigate the movements and foraging ecology of immature seabirds. Our study focussed on immature northern gannetsMorus bassanusaged 2–4 attending non-breeding aggregations alongside a large breeding colony. GPS-PTT tracking of five birds revealed that immatures have the ability to disperse widely during the breeding season, with some individuals potentially prospecting at other colonies. Overall, however, immatures were faithful to the colony of capture. During returns to the focal colony, immatures acted as central place foragers, conducted looping and commuting flights, and analysis of the variance in first-passage time revealed evidence of area-restricted search (ARS) behaviour. In addition, stable carbon (δ13C) and nitrogen (δ15N) isotope analyses indicate that immatures were isotopically segregated from breeders. Our findings provide insights into the foraging, prospecting and dispersal behaviour of immature seabirds, which may have important implications for understanding seabird ecology and conservation.
登录
查看更多内容
影响因子:
4.8
作者:
Hamer, K. C.;Humphreys, E. M.;Wanless, S.
通讯作者:
Wanless, S.
影响因子:
3.3
作者:
Boulinier, Thierry;Mccoy, Karen D.;Tveraa, Torkild
通讯作者:
Tveraa, Torkild
DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
H. Weimerskirch
通讯作者:
H. Weimerskirch
DOI:
--
发表时间:
1992
期刊:
影响因子:
--
作者:
N. Klomp;R. Furness
通讯作者:
R. Furness
DOI:
10.1098/rspb.2002.2083
发表时间:
2002-08-22
影响因子:
4.7
作者:
Lewis, S;Benvenuti, S;Hamer, KC
通讯作者:
Hamer, KC