Quantitative Genetics of Life History Traits in Coprophagous and Necrophagous Insects

2015 ◽  
pp. 333-360 ◽  
Author(s):  
Wolf Blanckenhorn
Keyword(s):  
Life History ◽  
Quantitative Genetics ◽  
Life History Traits

Quantitative genetics of life-history traits in a long-lived wild mammal

Heredity ◽  
2000 ◽  
Vol 85 (6) ◽  
pp. 593-603 ◽  
Author(s):  
Denis Réale ◽  
Marco Festa-Bianchet
Keyword(s):  
Life History ◽  
Quantitative Genetics ◽  
Life History Traits ◽  
Wild Mammal

scholarly journals NATURAL SELECTION AND QUANTITATIVE GENETICS OF LIFE-HISTORY TRAITS IN WESTERN WOMEN: A TWIN STUDY

Evolution ◽  
2001 ◽  
Vol 55 (2) ◽  
pp. 423-435 ◽  
Author(s):  
Katherine M. Kirk ◽  
Simon P. Blomberg ◽  
David L. Duffy ◽  
Andrew C. Heath ◽  
Ian P. F. Owens ◽  
...  
Keyword(s):  
Life History ◽  
Natural Selection ◽  
Quantitative Genetics ◽  
Twin Study ◽  
Life History Traits

scholarly journals Unidirectional response to bidirectional selection on body size II Quantitative genetics

2020 ◽  
Author(s):  
Arnaud Le Rouzic ◽  
Clémentine Renneville ◽  
Alexis Millot ◽  
Simon Agostini ◽  
David Carmignac ◽  
...  
Keyword(s):  
Life History ◽  
Body Size ◽  
Body Length ◽  
Quantitative Genetics ◽  
Artificial Selection ◽  
Life History Traits ◽  
Random Effect ◽  
Control Line ◽  
Early Maturity ◽  
And Control

AbstractAnticipating the genetic and phenotypic changes induced by natural or artificial selection requires reliable estimates of trait evolvabilities (genetic variances and covariances). However, whether or not multivariate quantitative genetics models are able to predict precisely the evolution of traits of interest, especially fitness-related, life-history traits, remains an open empirical question. Here, we assessed to what extent the response to bivariate artificial selection on both body size and maturity in the medaka Oryzias latipes, a model fish species, fits the theoretical predictions. Three lines (Large, Small, and Control lines) were differentially selected for body length at 75 days of age, conditional on maturity. As maturity and body size were phenotypically correlated, this selection procedure generated a bi-dimensional selection pattern on two life history traits. After removal of non-heritable trends and noise with a random effect (’animal’) model, the observed selection response did not match the expected bidirectional response. For body size, Large and Control lines responded along selection gradients (larger body size and stasis, respectively), but, surprisingly, the Small did not evolve a smaller body length, and remained identical to the Control line throughout the experiment. The magnitude of the empirical response was smaller than the theoretical prediction in both selected directions. For maturity, the response was opposite to the expectation (the Large line evolved late maturity compared to the Control line, while the Small line evolved early maturity, while the opposite pattern was predicted due to the strong positive genetic correlation between both traits). The mismatch between predicted and observed response was substantial and could not be explained by usual sources of uncertainties (including sampling effects, genetic drift, and error in G matrix estimates).

NATURAL SELECTION AND QUANTITATIVE GENETICS OF LIFE-HISTORY TRAITS IN WESTERN WOMEN: A TWIN STUDY

Evolution ◽  
2001 ◽  
Vol 55 (2) ◽  
pp. 423 ◽  
Author(s):  
Katherine M. Kirk ◽  
Simon P. Blomberg ◽  
David L. Duffy ◽  
Andrew C. Heath ◽  
Ian P. F. Owens ◽  
...  
Keyword(s):  
Life History ◽  
Natural Selection ◽  
Quantitative Genetics ◽  
Twin Study ◽  
Life History Traits

Prey tell: what quillback rockfish early life history traits reveal about their survival in encounters with juvenile coho salmon

2020 ◽  
Vol 650 ◽  
pp. 7-18 ◽  
Author(s):  
HW Fennie ◽  
S Sponaugle ◽  
EA Daly ◽  
RD Brodeur
Keyword(s):  
Life History ◽  
Early Life ◽  
Life History Traits ◽  
Direct Evidence ◽  
Coho Salmon ◽  
Larval Fish ◽  
Early Life History ◽  
In The Wild ◽  
Otolith Microstructure Analysis ◽  
Pelagic Juvenile

Predation is a major source of mortality in the early life stages of fishes and a driving force in shaping fish populations. Theoretical, modeling, and laboratory studies have generated hypotheses that larval fish size, age, growth rate, and development rate affect their susceptibility to predation. Empirical data on predator selection in the wild are challenging to obtain, and most selective mortality studies must repeatedly sample populations of survivors to indirectly examine survivorship. While valuable on a population scale, these approaches can obscure selection by particular predators. In May 2018, along the coast of Washington, USA, we simultaneously collected juvenile quillback rockfish Sebastes maliger from both the environment and the stomachs of juvenile coho salmon Oncorhynchus kisutch. We used otolith microstructure analysis to examine whether juvenile coho salmon were age-, size-, and/or growth-selective predators of juvenile quillback rockfish. Our results indicate that juvenile rockfish consumed by salmon were significantly smaller, slower growing at capture, and younger than surviving (unconsumed) juvenile rockfish, providing direct evidence that juvenile coho salmon are selective predators on juvenile quillback rockfish. These differences in early life history traits between consumed and surviving rockfish are related to timing of parturition and the environmental conditions larval rockfish experienced, suggesting that maternal effects may substantially influence survival at this stage. Our results demonstrate that variability in timing of parturition and sea surface temperature leads to tradeoffs in early life history traits between growth in the larval stage and survival when encountering predators in the pelagic juvenile stage.

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