Urban resources limit pair coordination over offspring provisioning

被引:16
作者
Baldan, Davide [1 ]
Ouyang, Jenny Q. [1 ]
机构
[1] Univ Nevada, Dept Biol, 1664 N Virginia St, Reno, NV 89557 USA
基金
美国国家科学基金会;
关键词
FOOD SUPPLEMENTATION; SEXUAL CONFLICT; GREAT; BEHAVIOR; DIET; URBANIZATION; NEGOTIATION; POPULATION; EVOLUTION; PREDATION;
D O I
10.1038/s41598-020-72951-2
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The amount of care parents provide to the offspring is complicated by an evolutionary conflict of interest ('sexual conflict') between the two parents. Recent theoretical models suggest that pair coordination of the provisioning may reduce this conflict and increase parent and offspring fitness. Despite empirical studies showing that pair coordination is common in avian species, it remains unclear how environmental and ecological conditions might promote or limit the ability of parents to coordinate care. We compared the level of pair coordination, measured as alternation and synchrony of the nest visits, of house wrens Troglodytes aedon pairs breeding in a rural (10 nests) and a suburban (9 nests) site and investigated how differences in parental behaviours were related to habitat composition, prey abundance and how they ultimately related to reproductive success. We found that parents alternated and synchronized their nest visits more in the rural site compared to the suburban one. The suburban site is characterized by a more fragmented habitat with more coniferous trees and less caterpillar availability. Offspring from the rural site were heavier at fledging than at the suburban site. Taken together, these results suggest that environmental conditions play an important role on the emergence of coordinated parental care and that considering environmental variables is pivotal to assess the fitness consequences of parental strategies.
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页数:11
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