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Offspring size-number trade-off in a lizard with small clutch sizes: tests of invariants and potential implications

Uller, Tobias LU and Olsson, Mats (2009) In Evolutionary Ecology 23(3). p.363-372
Abstract
Models of small clutch sizes predict a number of invariant relationships between means and variances of measures of reproductive investment. However, empirical tests of the models have been lagging behind theoretical work. We tested the predictions using data on the mallee dragon, Ctenophorus fordi, a species where the basic assumptions of the models are likely to be fulfilled. Some, but not all, qualitative predictions of the models were shown to hold true, but the data fitted poorly to quantitative predictions. The patterns of deviation from theory may suggest the presence of a lower, and potentially an upper, limit on egg mass. We also argue that multiple and non-independent allocation decisions between total reproductive effort, growth... (More)
Models of small clutch sizes predict a number of invariant relationships between means and variances of measures of reproductive investment. However, empirical tests of the models have been lagging behind theoretical work. We tested the predictions using data on the mallee dragon, Ctenophorus fordi, a species where the basic assumptions of the models are likely to be fulfilled. Some, but not all, qualitative predictions of the models were shown to hold true, but the data fitted poorly to quantitative predictions. The patterns of deviation from theory may suggest the presence of a lower, and potentially an upper, limit on egg mass. We also argue that multiple and non-independent allocation decisions between total reproductive effort, growth and maintenance, and offspring size-number allocation could be important factors in the evolution of size-number strategies in lizards and thus need to be taken into account in theoretical models. The present study shows the potential to use small clutch size models to gain further insights into reproductive investment and allocation decisions in squamates (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Evolutionary Ecology
volume
23
issue
3
pages
363 - 372
publisher
Springer
external identifiers
  • scopus:63849175208
ISSN
1573-8477
DOI
10.1007/s10682-007-9231-3
language
English
LU publication?
no
id
5f3ece07-463a-4eb4-8c50-22b05a9d4f4f (old id 4739157)
date added to LUP
2014-11-10 13:42:42
date last changed
2017-08-20 04:06:11
@article{5f3ece07-463a-4eb4-8c50-22b05a9d4f4f,
  abstract     = {Models of small clutch sizes predict a number of invariant relationships between means and variances of measures of reproductive investment. However, empirical tests of the models have been lagging behind theoretical work. We tested the predictions using data on the mallee dragon, Ctenophorus fordi, a species where the basic assumptions of the models are likely to be fulfilled. Some, but not all, qualitative predictions of the models were shown to hold true, but the data fitted poorly to quantitative predictions. The patterns of deviation from theory may suggest the presence of a lower, and potentially an upper, limit on egg mass. We also argue that multiple and non-independent allocation decisions between total reproductive effort, growth and maintenance, and offspring size-number allocation could be important factors in the evolution of size-number strategies in lizards and thus need to be taken into account in theoretical models. The present study shows the potential to use small clutch size models to gain further insights into reproductive investment and allocation decisions in squamates},
  author       = {Uller, Tobias and Olsson, Mats},
  issn         = {1573-8477},
  language     = {eng},
  number       = {3},
  pages        = {363--372},
  publisher    = {Springer},
  series       = {Evolutionary Ecology},
  title        = {Offspring size-number trade-off in a lizard with small clutch sizes: tests of invariants and potential implications},
  url          = {http://dx.doi.org/10.1007/s10682-007-9231-3},
  volume       = {23},
  year         = {2009},
}