Body size is associated with yearling breeding and extra-pair mating in the Island Scrub-Jay
Body size is associated with yearling breeding and extra-pair mating in the Island Scrub-Jay
复制标题
岛屿灌丛松鸦的体型大小与一岁繁殖和配对外交配有关
DOI:
10.1093/ornithology/ukab045
复制
发表时间:
2021
期刊:
影响因子:
2.3
通讯作者:
Desrosiers, M. A.
中科院分区:
文献类型:
--
作者:
Desrosiers, M. A.
Large body size is an important determinant of individual fitness in many animal species, especially in island systems where habitat saturation may result in strong intraspecific competition for mates and breeding territories. Here we show that large body size is associated with benefits to yearling breeding and extra-pair mating in the Island Scrub-Jay (Aphelocoma insularis), endemic to Santa Cruz Island, California. This species is ~20% larger than its mainland congener, consistent with the island syndrome, indicating that body size may be a trait under selection. From 2009 to 2013, we quantified the reproductive success of a marked population of Island Scrub-Jays, tracked which yearlings acquired a breeding territory and bred, and measured the occurrence of extra-pair paternity. Two potential contributors to fitness were positively related to body size. Larger yearling males were more likely to breed, possibly due to greater behavioral dominance during aggressive encounters. Larger males were also less likely to lose paternity to extra-pair males and, anecdotally, extra-pair males were larger than the social male cuckolded. This study provides evidence that larger males may have a fitness advantage over smaller males by breeding earlier and avoiding paternity loss, but estimates of lifetime reproductive success are ultimately needed for Island Scrub-Jays and other long-lived species.
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DOI:
10.1515/9781400837557
发表时间:
2007-01
期刊:
--
影响因子:
--
作者:
J. Bonner
通讯作者:
J. Bonner
影响因子:
3.4
作者:
E. Palkovacs
通讯作者:
E. Palkovacs
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
S. Wells;W. Ji;J. Dale;Beatrix Jones;D. Gleeson
通讯作者:
D. Gleeson
DOI:
10.1093/auk/106.4.666
发表时间:
1989-10
期刊:
The Auk
影响因子:
--
作者:
J. Rising;K. Somers
通讯作者:
J. Rising;K. Somers
影响因子:
2.9
作者:
BROWN, JH;MARQUET, PA;TAPER, ML
通讯作者:
TAPER, ML