کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6303811 1618402 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Breeding failure induces large scale prospecting movements in the black-legged kittiwake
ترجمه فارسی عنوان
شکستگی پرورش موجب می شود جنبش های گسترده ای در زمینه کشف جغرافیایی در کتایویک آکادمی سیاهپوست؟
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم آبزیان
چکیده انگلیسی


- Black-legged kittiwake breeders were put in failure at the end of incubation to test predictions related to breeding strategies.
- They were tracked with GPS along with successful breeders.
- As predicted, failed and successful breeders differed in their behaviour.
- Only failed breeders performed prospecting movements to other breeding colonies.
- This study opens new perspectives on breeding habitat selection processes.

Before making dispersal decisions, many species are known to gather social information by prospecting potential future breeding sites, especially when they have failed breeding. So far, the role of current breeding performance on the occurrence of prospecting movements has mainly been studied at limited spatial scales, because of difficulties in tracking free-ranging, fast-moving individuals between distant breeding patches. Little information is thus available on individual behaviour and the spatial extent of prospecting movements in response to breeding failure. To address this issue, black-legged kittiwakes which breeding success was manipulated were tracked with GPS at the end of incubation in two Norwegian colonies. Crucially, and as predicted, prospecting visits to other breeding colonies were recorded in 33% of artificially-failed breeders, but never in successful ones. They occurred at large (40 km) as well as local spatial scales (1 km). Time-budgets of successful and failed breeders differed significantly in terms of trip duration, but also foraging, resting and nesting propensities. These results provide important elements to assess trade-offs between prospecting and other activities. They show that a substantial proportion of failed breeders prospect as early as within a week after failure at the egg stage and suggest that these individuals assess their options of future reproduction by prospecting alternative areas, although dispersal decisions may also involve more complex behavioural processes. Because they link breeding colonies situated tens of kilometres apart, prospecting movements may have critical implications for the dynamics of subdivided populations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Experimental Marine Biology and Ecology - Volume 473, December 2015, Pages 138-145
نویسندگان
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