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Effects of oil exposure and dispersant use upon environmental adaptation performance and fitness in the European sea bass, Dicentrarchus labrax ArchiMer
Claireaux, Guy; Theron, Michael; Prineau, Michel; Dussauze, Matthieu; Merlin, Francois Xavier; Le Floch, Stephane.
The worldwide increasing recourse to chemical dispersants to deal with oil spills in marine coastal ecosystems is a controversial issue. Yet, there exists no adequate methodology that can provide reliable predictions of how oil and dispersant-treated oil can affect relevant organism or population-level performance. The primary objective of the present study was to examine and compare the effects of exposure to untreated oil (weathered Arabian light crude oil), chemically dispersed oil (Finasol, TOTAL-Fluides) or dispersant alone, upon the ability of fish for environmental adaptation. To reach that goal, we implemented high-throughput, non-lethal challenge tests to estimate individual hypoxia and heat tolerance as surrogate measures of their capacity to...
Tipo: Text Palavras-chave: Oil-spill; Dispersant; Fish; Temperature; Hypoxia; Survival; Growth; Environmental adaptation ability; Darwinian fitness.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00137/24831/23045.pdf
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Gene flow and local adaptation: Antagonistic forces shape populations of Ilex dumosa (Aquifoliaceae) Boletín de la Sociedad
Coulleri,Juan Pablo.
The evolutionary forces acting in a set of populations may vary in space, resulting in Genotype x Environment interaction for Darwinian fitness, fixing in some populations adaptative traits of a local population to a specific environmental conditions or, by gene flow homogenize the genes frequencies and make a set of population adapted to a group of environments. This paper tries to elucidate the population dynamics of a set of populations of Ilex dumosa Reiss., in which was measured quantitative traits of six populations from six geographic regions and test their responses to environmental changes. The experimental approach was made in common garden experiment and by reciprocal transplant experiment. Local adaptation was investigated both by native...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Darwinian fitness; Genotype x environment interaction; Marginal speciation; Reciprocal transplant experiment; Stabilizing selection.
Ano: 2010 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722010000200012
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