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Changements adaptatifs induits par la pêche chez les populations halieutiques ArchiMer
Marty, Lise.
Fishing is an important source of mortality in harvested populations and therefore may induce adaptive responses. These responses affect life-history traits in particular, which have consequences for stocks’ dynamics, and thus can alter the demographic direct effect of fishing (i.e. the reduction in stock’s biomass). Fishing-induced adaptive changes depend, non-exclusively, on two processes: evolution and phenotypic plasticity. These two components are observed at the phenotypic level because functional genes coding for the traits undergoing adaptive changes have not yet been identified. These two origins are confounded in individual phenotypes, and the impact of adaptive changes in the long run remains therefore unclear: evolutionary changes are expected...
Tipo: Text Palavras-chave: : Pêche; Évolution adaptative; Plasticité phénotypique; Norme de réaction; Dérive génétique; Érosion génétique; Age et taille à maturation; Croissance; Survie; Trade-offs; Densité-dépendance; Gadidées de mer du nord; Fishing; Adaptive evolution; Phenotypic plasticity; Reaction norm; Genetic drift; Genetic erosion; Age and size at maturation; Growth; Survival; Trade-offs; Density-dependence; North sea Gadoids.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00079/19013/16591.pdf
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Enrichment of repeats in proteins of protozoan parasites relates to the ability to invade host cells and evade host immune response. Repositório Alice
MENDES, T. A. de O.; LOBO, F. P.; RODRIGUES, T. S.; LUIZ, G. F. R.; ROCHA, W. D. da; FUJIWARA, R. T.; TEIXEIRA, S. M. R.; BARTHOLOMEU, D. C..
Here, we investigated whether there is a bias in the repetitive content found in the predicted proteomes of six exclusively extracellular, and seventeen obligate intracellular protozoan parasites, as well as four free-living protists and tried to correlate the results with the distinct ecological niches they occupy and with distinct protein functions.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Evolução do genoma; Evolução adaptativa; Interação hóspede-parasita; Adaptive evolution; Genome evolution; Host-parasite interaction; Genome.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/946661
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Epigenetic origin of adaptive phenotypic variants in the human blood fluke Schistosoma mansoni ArchiMer
Fneich, Sara; Theron, Andre; Cosseau, Celine; Rognon, Anne; Aliaga, Benoit; Buard, Jerome; Duval, David; Arancibia, Nathalie; Boissier, Jerome; Roquis, David; Mitta, Guillaume; Grunau, Christoph.
Background: Adaptive evolution is not possible without the generation of phenotypic variants. The origin of these variations has been a central topic in evolutionary biology. Up to now, it was commonly accepted that standing genetic variation is the only cause of phenotypic variants. However, epigenetic information is emerging as a complementary source of heritable phenotypic variation that contributes to evolution. The relative importance of genetics and epigenetics in generating heritable phenotypic variation is nevertheless a matter of debate. Results: We used a host-parasite system to address this question. The human blood fluke Schistosoma mansoni can adapt rapidly to new intermediate snail hosts. The interaction between parasite and mollusk is...
Tipo: Text Palavras-chave: Epigenetics; Adaptive evolution; Compatibility polymorphism; Schistosoma mansoni.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00615/72708/71730.pdf
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Phylogeny and molecular dating of the cerato-platanin-encoding genes Genet. Mol. Biol.
Yu,Hanying; Li,Lin.
The cerato-platanin family consists of proteins that can induce immune responses, cause necrosis, change chemotaxis and locomotion and may be related to the growth and development of various fungi. In this work, we analyzed the phylogenetic relationships among genes encoding members of the cerato-platanin family and computed the divergence times of the genes and corresponding fungi. The results showed that cerato-platanin-encoding genes could be classified into 10 groups but did not cluster according to fungal classes or their functions. The genes transferred horizontally and showed duplication. Molecular dating and adaptive evolution analyses indicated that the cerato-platanin gene originated with the appearance of saprophytes and that the gene was under...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Adaptive evolution; Cerato-platanin gene; Phylogeny; Relaxed clock.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000300015
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