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Can intraspecific brood parasitism be detected using egg morphology only?

Ådahl, Emma LU ; Lindstrom, J; Ruxton, G D; Arnold, K E and Begg, T (2004) In Journal of Avian Biology1994-01-01+01:00 35(4). p.360-364
Abstract
Intraspecific brood parasites lay their eggs in the nests of conspecifics. There are a number of methods for detecting intraspecific brood parasitism (IBP) in birds based on egg morphology. Here we test Eadie's (1989) method, which calculates the Euclidean distances between eggs in a given clutch in a three-dimensional space (weight, length and width). A parasitised clutch is predicted to contain an egg (or eggs) that is significantly different from the clutch's other eggs. Data from three species were analysed. Our captive zebra finch Taeniopygia guttata clutches did not include any instances of IBP, the wild jackdaw Corvus monedula data were unlikely to contain any, and for the goldeneye Bucephala clangula data set we had an... (More)
Intraspecific brood parasites lay their eggs in the nests of conspecifics. There are a number of methods for detecting intraspecific brood parasitism (IBP) in birds based on egg morphology. Here we test Eadie's (1989) method, which calculates the Euclidean distances between eggs in a given clutch in a three-dimensional space (weight, length and width). A parasitised clutch is predicted to contain an egg (or eggs) that is significantly different from the clutch's other eggs. Data from three species were analysed. Our captive zebra finch Taeniopygia guttata clutches did not include any instances of IBP, the wild jackdaw Corvus monedula data were unlikely to contain any, and for the goldeneye Bucephala clangula data set we had an observational estimate of IBP. We simulated IBP in the zebra finch, jackdaw and goldeneye data to test whether the method reliably detects an experimentally 'parasitised' clutch. We show that the distributions of the test statistics greatly overlap in 'parasitised' and unmodified clutches, and are dependent on the clutch size. We therefore conclude that the method can only be used with caution, after calibrating it for a given population. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Avian Biology1994-01-01+01:00
volume
35
issue
4
pages
360 - 364
publisher
Federation of European Neuroscience Societies and Blackwell Publishing Ltd
external identifiers
  • wos:000223085900010
  • scopus:3543140712
ISSN
0908-8857
DOI
10.1111/j.0908-8857.2004.03224.x
language
English
LU publication?
yes
id
5535f53c-922a-454f-90d4-366f2c6c5d88 (old id 135406)
date added to LUP
2007-07-03 16:01:50
date last changed
2017-03-19 03:39:07
@article{5535f53c-922a-454f-90d4-366f2c6c5d88,
  abstract     = {Intraspecific brood parasites lay their eggs in the nests of conspecifics. There are a number of methods for detecting intraspecific brood parasitism (IBP) in birds based on egg morphology. Here we test Eadie's (1989) method, which calculates the Euclidean distances between eggs in a given clutch in a three-dimensional space (weight, length and width). A parasitised clutch is predicted to contain an egg (or eggs) that is significantly different from the clutch's other eggs. Data from three species were analysed. Our captive zebra finch Taeniopygia guttata clutches did not include any instances of IBP, the wild jackdaw Corvus monedula data were unlikely to contain any, and for the goldeneye Bucephala clangula data set we had an observational estimate of IBP. We simulated IBP in the zebra finch, jackdaw and goldeneye data to test whether the method reliably detects an experimentally 'parasitised' clutch. We show that the distributions of the test statistics greatly overlap in 'parasitised' and unmodified clutches, and are dependent on the clutch size. We therefore conclude that the method can only be used with caution, after calibrating it for a given population.},
  author       = {Ådahl, Emma and Lindstrom, J and Ruxton, G D and Arnold, K E and Begg, T},
  issn         = {0908-8857},
  language     = {eng},
  number       = {4},
  pages        = {360--364},
  publisher    = {Federation of European Neuroscience Societies and Blackwell Publishing Ltd},
  series       = {Journal of Avian Biology1994-01-01+01:00},
  title        = {Can intraspecific brood parasitism be detected using egg morphology only?},
  url          = {http://dx.doi.org/10.1111/j.0908-8857.2004.03224.x},
  volume       = {35},
  year         = {2004},
}