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Differential begging and locomotory behaviour by early and late hatched nestlings affecting the distribution of food in asynchronously hatched broods of altricial birds

Rydén, Olof LU and Bengtsson, Hans LU (1980) In ZEITSCHRIFT FUR TIERPSYCHOLOGIE-JOURNAL OF COMPARATIVE ETHOLOGY 53. p.209-224
Abstract (Swedish)
Distribution of food to early and late hatchcd nestlings was studied in asynchronously hatched broods of the grr,it tit P~rcrs major, the blackbird Turdus mcrula, and the fieldfare T. pilaris. Food distribution is related to the locomotory and begging behaviour and positions in the nest of these nestlings. Late hatched (small) nestlings were found to beg more often per feed than bigger nectlings and move more towards favoured positions in the nest to counteract selective feeding of bigger young. The functional significance of these differences in the behaviour of early and late hatched nestlings are discussed. It is argued that they are adaptive by 1) ensuring that each nestling survives when food supplies are ample, and 2) by mediating an... (More)
Distribution of food to early and late hatchcd nestlings was studied in asynchronously hatched broods of the grr,it tit P~rcrs major, the blackbird Turdus mcrula, and the fieldfare T. pilaris. Food distribution is related to the locomotory and begging behaviour and positions in the nest of these nestlings. Late hatched (small) nestlings were found to beg more often per feed than bigger nectlings and move more towards favoured positions in the nest to counteract selective feeding of bigger young. The functional significance of these differences in the behaviour of early and late hatched nestlings are discussed. It is argued that they are adaptive by 1) ensuring that each nestling survives when food supplies are ample, and 2) by mediating an optimal brood reduction when food is insufficient to raise the entire brood. The roles of asynchronous hatching, and selective feeding which follows from differential behaviour of early and late hatchcd young are discussed in relation to food conditions during the breeding season. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
parent-young interaction, behavioral ecology, sibling rivalry
in
ZEITSCHRIFT FUR TIERPSYCHOLOGIE-JOURNAL OF COMPARATIVE ETHOLOGY
volume
53
pages
209 - 224
language
English
LU publication?
yes
id
b6a259eb-0ed6-4660-91d4-b53b41642175
date added to LUP
2016-08-21 18:51:03
date last changed
2016-08-22 15:53:53
@misc{b6a259eb-0ed6-4660-91d4-b53b41642175,
  abstract     = {Distribution of food to early and late hatchcd nestlings was studied in asynchronously hatched broods of the grr,it tit P~rcrs major, the blackbird Turdus mcrula, and the fieldfare T. pilaris. Food distribution is related to the locomotory and begging behaviour and positions in the nest of these nestlings. Late hatched (small) nestlings were found to beg more often per feed than bigger nectlings and move more towards favoured positions in the nest to counteract selective feeding of bigger young. The functional significance of these differences in the behaviour of early and late hatched nestlings are discussed. It is argued that they are adaptive by 1) ensuring that each nestling survives when food supplies are ample, and 2) by mediating an optimal brood reduction when food is insufficient to raise the entire brood. The roles of asynchronous hatching, and selective feeding which follows from differential behaviour of early and late hatchcd young are discussed in relation to food conditions during the breeding season.},
  author       = {Rydén, Olof and Bengtsson, Hans},
  keyword      = {parent-young interaction,behavioral ecology,sibling rivalry},
  language     = {eng},
  pages        = {209--224},
  series       = {ZEITSCHRIFT FUR TIERPSYCHOLOGIE-JOURNAL OF COMPARATIVE ETHOLOGY},
  title        = {Differential begging and locomotory behaviour by early and late hatched nestlings affecting the distribution of food in asynchronously hatched broods of altricial birds},
  volume       = {53},
  year         = {1980},
}