Evolutionary potential of a large marine vertebrate: Quantitative genetic parameters in a wild population

Joseph D. DiBattista, Kevin A. Feldheim, Dany Garant, Samuel H. Gruber, Andrew P. Hendry

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Estimating quantitative genetic parameters ideally takes place in natural populations, but relatively few studies have overcome the inherent logistical difficulties. For this reason, no estimates currently exist for the genetic basis of life-history traits in natural populations of large marine vertebrates. And yet such estimates are likely to be important given the exposure of this taxon to changing selection pressures, and the relevance of life-history traits to population productivity. We report such estimates from a long-term (1995-2007) study of lemon sharks (Negaprion brevirostris) conducted at Bimini, Bahamas. We obtained these estimates by genetically reconstructing a population pedigree (117 dams, 487 sires, and 1351 offspring) and then using an "animal model" approach to estimate quantitative genetic parameters. We find significant additive genetic (co)variance, and hence moderate heritability, for juvenile length and mass. We also find substantial maternal effects for these traits at age-0, but not age-1, confirming that genotype-phenotype interactions between mother and offspring are strongest at birth; although these effects could not be parsed into their genetic and nongenetic components. Our results suggest that human-imposed selection pressures (e.g., size-selective harvesting) might impose noteworthy evolutionary change even in large marine vertebrates. We therefore use our findings to explain how maternal effects may sometimes promote maladaptive juvenile traits, and how lemon sharks at different nursery sites may show "constrained local adaptation." We also show how single-generation pedigrees, and even simple marker-based regression methods, can provide accurate estimates of quantitative genetic parameters in at least some natural systems.

Original languageEnglish
Pages (from-to)1051-1067
Number of pages17
JournalEvolution
Volume63
Issue number4
DOIs
StatePublished - Apr 1 2009

Fingerprint

Negaprion brevirostris
quantitative genetics
wild population
Vertebrates
vertebrate
vertebrates
Sharks
Pedigree
maternal effect
pedigree
Population
Bahamas
life history
shark
life history trait
Pressure
genetic covariance
Nurseries
dams (mothers)
sires

Keywords

  • Heritability
  • Lemon shark
  • Maternal effects
  • Morphological traits
  • Power and sensitivity analysis
  • Sibship reconstruction

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Ecology, Evolution, Behavior and Systematics
  • Genetics

Cite this

DiBattista, J. D., Feldheim, K. A., Garant, D., Gruber, S. H., & Hendry, A. P. (2009). Evolutionary potential of a large marine vertebrate: Quantitative genetic parameters in a wild population. Evolution, 63(4), 1051-1067. https://doi.org/10.1111/j.1558-5646.2008.00605.x

Evolutionary potential of a large marine vertebrate : Quantitative genetic parameters in a wild population. / DiBattista, Joseph D.; Feldheim, Kevin A.; Garant, Dany; Gruber, Samuel H.; Hendry, Andrew P.

In: Evolution, Vol. 63, No. 4, 01.04.2009, p. 1051-1067.

Research output: Contribution to journalArticle

DiBattista, JD, Feldheim, KA, Garant, D, Gruber, SH & Hendry, AP 2009, 'Evolutionary potential of a large marine vertebrate: Quantitative genetic parameters in a wild population', Evolution, vol. 63, no. 4, pp. 1051-1067. https://doi.org/10.1111/j.1558-5646.2008.00605.x
DiBattista, Joseph D. ; Feldheim, Kevin A. ; Garant, Dany ; Gruber, Samuel H. ; Hendry, Andrew P. / Evolutionary potential of a large marine vertebrate : Quantitative genetic parameters in a wild population. In: Evolution. 2009 ; Vol. 63, No. 4. pp. 1051-1067.
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