Arid
DOI10.2989/00306525.2018.1538061
The energetic significance of communal roosting and insulated roost nests in a small arid-zone passerine
Lubbe, Nevanya1; Czenze, Zenon J.2; Noakes, Matthew J.1; McKechnie, Andrew E.1,3
通讯作者McKechnie, Andrew E.
来源期刊OSTRICH
ISSN0030-6525
EISSN1727-947X
出版年2018
卷号89期号:4页码:347-354
英文摘要

Small endotherms have evolved behavioural mechanisms for reducing rest-phase energy expenditure, which reduce the likelihood of mismatches between energy supply and demand during periods of cold weather and/or food scarcity. Although the energetic consequences of communal roosting and the use of insulated roosts have been the subject of numerous studies, less is known about the energy savings achieved by species that use these two behaviours simultaneously. We hypothesised that communal roosting in insulated roost nests by a small arid-zone passerine, the Scaly-feathered Finch Sporopipes squamifrons, results in additive energetic benefits that reduce nocturnal energy requirements far below those of individual birds roosting in the open. We measured metabolic rates in finches over air temperatures (T-a) between -5 and 20 degrees C using flow-through respirometry. Measurements were taken from single finches and groups varying in size from two to 12 individuals, with or without a roost nest. Consistent with our predictions, rest-phase resting metabolic rate (RMR) of finches decreased when the birds roosted communally and decreased further when groups were roosting in a nest. In the absence of a nest, groups of eight or 12 birds reduced RMR by >30% compared with single birds. These energy savings increased further when groups roosted in nests: at T-a = 0 degrees C, groups of eight or 12 finches approximately halved their RMR compared with that of groups without nests. Our data confirm that Scaly-feathered Finches save considerable energy by roosting communally in roost nests, and these behaviours likely are a key reason why this small species from subtropical latitudes can occur in areas with winter night-time temperatures as low as -10 degrees C.


英文关键词energetics huddling nest Scaly-feathered Finch Sporopipes squamifrons thermoregulation
类型Article
语种英语
国家South Africa ; New Zealand
收录类别SCI-E
WOS记录号WOS:000454157800008
WOS关键词THERMOREGULATORY BENEFITS ; PHILETAIRUS-SOCIUS ; EVOLUTION ; ENDOTHERMY ; MAMMALS ; BIRDS ; WOODHOOPOES ; BEHAVIOR
WOS类目Ornithology
WOS研究方向Zoology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/211913
作者单位1.Univ Pretoria, Dept Zool & Entomol, FitzPatrick Inst, DST NRF Ctr Excellence, Pretoria, South Africa;
2.Univ Auckland, Sch Biol Sci, Auckland, New Zealand;
3.South African Natl Biodivers Inst, Natl Zool Garden, South African Res Chair Conservat Physiol, Pretoria, South Africa
推荐引用方式
GB/T 7714
Lubbe, Nevanya,Czenze, Zenon J.,Noakes, Matthew J.,et al. The energetic significance of communal roosting and insulated roost nests in a small arid-zone passerine[J],2018,89(4):347-354.
APA Lubbe, Nevanya,Czenze, Zenon J.,Noakes, Matthew J.,&McKechnie, Andrew E..(2018).The energetic significance of communal roosting and insulated roost nests in a small arid-zone passerine.OSTRICH,89(4),347-354.
MLA Lubbe, Nevanya,et al."The energetic significance of communal roosting and insulated roost nests in a small arid-zone passerine".OSTRICH 89.4(2018):347-354.
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