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Titolo:
The effect of clutch cooling rate on starling, Sturnus vulgaris, incubation strategy
Autore:
Reid, JM; Monaghan, P; Ruxton, GD;
Indirizzi:
Univ Glasgow, Div Environm & Evolut Biol, Glasgow G12 8QQ, Lanark, Scotland Univ Glasgow Glasgow Lanark Scotland G12 8QQ ow G12 8QQ, Lanark, Scotland
Titolo Testata:
ANIMAL BEHAVIOUR
, volume: 58, anno: 1999,
parte:, 6
pagine: 1161 - 1167
SICI:
0003-3472(199912)58:<1161:TEOCCR>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
NEST ATTENTIVENESS; EGG TEMPERATURE; HIRUNDO-RUSTICA; SWALLOWS; BEHAVIOR; PATTERNS; SPARROW; CARE; TIME;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Reid, JM Univ Glasgow, Div Environm & Evolut Biol, Glasgow G12 8QQ, Lanark, Scotland Univ Glasgow Glasgow Lanark Scotland G12 8QQ Q, Lanark, Scotland
Citazione:
J.M. Reid et al., "The effect of clutch cooling rate on starling, Sturnus vulgaris, incubation strategy", ANIM BEHAV, 58, 1999, pp. 1161-1167

Abstract

In avian species where only one parent incubates, that parent must divide its time between the mutually exclusive activities of incubation and foraging in such a way as to maintain both body condition and clutch temperature within certain limits. In a uniparental incubator, the starling, we experimentally reduced the rate at which unattended clutches of eggs cooled down and monitored the resulting changes in the parent's incubation strategy. Opposite to the predictions of standard models of time allocation during incubation, parents spent a much greater percentage of each 24-h period incubating when the rate of clutch cooling was reduced. Incubation bouts lasted significantly longer on experimental nests than on control nests, both during the daytime and overnight. Mean foraging bout duration did not differ between the two groups of nests. These results are consistent with the hypotheses that parental foraging success cues the end of a foraging bout, and that parental energy level cues the end of an incubation bout. However, most previous studies suggest that parents spend less time incubating when the rateof clutch cooling is slow. If parental energy level cues departure, these results can be explained only if the amount of time available for incubation is constrained in these cases by the time a parent must spend foraging inorder to maintain body condition. Such parents should take more time away from incubation when the unattended clutch cools slowly, as this is when the cost of being absent is minimized. (C) 1999 The Association for the Studyof Animal Behaviour.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/07/20 alle ore 13:38:03