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Offspring size and timing of hatching determine survival and reproductive output in a lizard

Uller, Tobias LU and Olsson, Mats (2010) In Oecologia 162(3). p.663-671
Abstract
Selection on offspring size and timing of birth or hatching could have important consequences for maternal investment strategies. Here we show consistent viability selection on hatchling body length across 2 consecutive years in a lizard that lays several clutches per season. There was no effect of hatching date on survival to maturity. However, both early hatching and large hatchling size increased adult size, which has a positive effect on total reproductive output. Earlier hatching also led to an earlier onset of reproduction. Overall, increased survival probability for large hatchlings and a positive effect of clutch size on recruitment suggest consistent directional selection on both egg size and clutch size within and across years.... (More)
Selection on offspring size and timing of birth or hatching could have important consequences for maternal investment strategies. Here we show consistent viability selection on hatchling body length across 2 consecutive years in a lizard that lays several clutches per season. There was no effect of hatching date on survival to maturity. However, both early hatching and large hatchling size increased adult size, which has a positive effect on total reproductive output. Earlier hatching also led to an earlier onset of reproduction. Overall, increased survival probability for large hatchlings and a positive effect of clutch size on recruitment suggest consistent directional selection on both egg size and clutch size within and across years. Because offspring size and timing of hatching are strongly affected by environmental and maternal effects, there should be potential for strong transgenerational effects on reproductive output in this species. We briefly discuss the implications of these results for the evolutionary ecology of maternal investment and population fluctuations in short-lived lizards (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Oecologia
volume
162
issue
3
pages
663 - 671
publisher
Springer
external identifiers
  • scopus:77949264224
ISSN
1432-1939
DOI
10.1007/s00442-009-1503-x
language
English
LU publication?
no
id
8fcc43c1-b229-4a11-a13a-a998f76447d2 (old id 4739086)
date added to LUP
2014-11-11 09:59:36
date last changed
2018-06-03 03:50:40
@article{8fcc43c1-b229-4a11-a13a-a998f76447d2,
  abstract     = {Selection on offspring size and timing of birth or hatching could have important consequences for maternal investment strategies. Here we show consistent viability selection on hatchling body length across 2 consecutive years in a lizard that lays several clutches per season. There was no effect of hatching date on survival to maturity. However, both early hatching and large hatchling size increased adult size, which has a positive effect on total reproductive output. Earlier hatching also led to an earlier onset of reproduction. Overall, increased survival probability for large hatchlings and a positive effect of clutch size on recruitment suggest consistent directional selection on both egg size and clutch size within and across years. Because offspring size and timing of hatching are strongly affected by environmental and maternal effects, there should be potential for strong transgenerational effects on reproductive output in this species. We briefly discuss the implications of these results for the evolutionary ecology of maternal investment and population fluctuations in short-lived lizards},
  author       = {Uller, Tobias and Olsson, Mats},
  issn         = {1432-1939},
  language     = {eng},
  number       = {3},
  pages        = {663--671},
  publisher    = {Springer},
  series       = {Oecologia},
  title        = {Offspring size and timing of hatching determine survival and reproductive output in a lizard},
  url          = {http://dx.doi.org/10.1007/s00442-009-1503-x},
  volume       = {162},
  year         = {2010},
}