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Effect of experimentally altered brood size on frequency and timing of second clutches in the great tit

Smith, Henrik G. LU ; Källander, Hans LU and Nilsson, Jan-Åke LU (1987) In Auk 104. p.700-706
Abstract
Brood size in the Great Tit (Parus major) was manipulated (increased, decreased, or unchanged) when nestlings were 5 days old. Both the frequency of second clutches and the interbrood interval were affected. The number of nestlings and hatching date, but not nestling and female mass, differed between first broods followed and not followed by second clutches. Hatching date and the number of nestlings in the first brood explained most of the variation in interbrood interval, whereas female mass did not contribute. Feeding first-brood nestlings and fledglings is an energy-demanding process, and the female may have to allocate resources to brood-feeding at the expense of reproductive de- velopment. Furthermore, a larger brood requires a longer... (More)
Brood size in the Great Tit (Parus major) was manipulated (increased, decreased, or unchanged) when nestlings were 5 days old. Both the frequency of second clutches and the interbrood interval were affected. The number of nestlings and hatching date, but not nestling and female mass, differed between first broods followed and not followed by second clutches. Hatching date and the number of nestlings in the first brood explained most of the variation in interbrood interval, whereas female mass did not contribute. Feeding first-brood nestlings and fledglings is an energy-demanding process, and the female may have to allocate resources to brood-feeding at the expense of reproductive de- velopment. Furthermore, a larger brood requires a longer period of feeding than a smaller brood. These circumstances probably explain why the size of the first brood affects the timing of the second clutch. Female condition and food depletion of the territory do not seem to be important. Because late second clutches have a lower probability of fledgling survival than do earlier ones-and consequently are of lower value from the female's standpoint-a large first clutch may delay laying to the point that a second clutch is not worthwhile. We conclude that a female's decision whether to lay a second clutch is a strategic one based on the value of the second clutch; a female that "decides" to lay a second clutch starts as quickly as possible. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Auk
volume
104
pages
700 - 706
publisher
BioOne
external identifiers
  • scopus:0000207050
ISSN
0004-8038
language
English
LU publication?
yes
id
1de8f21b-8e87-4e14-9db0-dd286c72d5a5
alternative location
http://www.jstor.org/stable/4087282
date added to LUP
2017-07-10 14:57:35
date last changed
2017-09-24 05:13:07
@article{1de8f21b-8e87-4e14-9db0-dd286c72d5a5,
  abstract     = {Brood size in the Great Tit (Parus major) was manipulated (increased, decreased, or unchanged) when nestlings were 5 days old. Both the frequency of second clutches and the interbrood interval were affected. The number of nestlings and hatching date, but not nestling and female mass, differed between first broods followed and not followed by second clutches. Hatching date and the number of nestlings in the first brood explained most of the variation in interbrood interval, whereas female mass did not contribute. Feeding first-brood nestlings and fledglings is an energy-demanding process, and the female may have to allocate resources to brood-feeding at the expense of reproductive de- velopment. Furthermore, a larger brood requires a longer period of feeding than a smaller brood. These circumstances probably explain why the size of the first brood affects the timing of the second clutch. Female condition and food depletion of the territory do not seem to be important. Because late second clutches have a lower probability of fledgling survival than do earlier ones-and consequently are of lower value from the female's standpoint-a large first clutch may delay laying to the point that a second clutch is not worthwhile. We conclude that a female's decision whether to lay a second clutch is a strategic one based on the value of the second clutch; a female that "decides" to lay a second clutch starts as quickly as possible.},
  author       = {Smith, Henrik G. and Källander, Hans and Nilsson, Jan-Åke},
  issn         = {0004-8038},
  language     = {eng},
  pages        = {700--706},
  publisher    = {BioOne},
  series       = {Auk},
  title        = {Effect of experimentally altered brood size on frequency and timing of second clutches in the great tit},
  volume       = {104},
  year         = {1987},
}