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POPULATION ADAPTATION [7 records]

Record 1 2010-06-09

English

Subject field(s)
  • Evolution (Biology)
CONT

Cladogenesis defines those cases of evolution in which one species develops into two or more through adaptation. The classic example is the different species unique to the Galapagos Islands, where small populations of creatures from South America evolved in response to their new ecosystem.... There is disagreement about what constitutes a new species, but it's generally agreed that if the mating of individuals from different populations cannot result in fertile and viable offspring, then they belong to different species. Cladogenesis explains the development of a large assortment of species from a smaller set of ancestral species through evolution. Unlike anagenesis, speciation through cladogenesis does not require the extinction of the ancestral population. Through successive cladogenetic splits, either with or without the extinction of the ancestral population, the total number of species increases over time. Cladogenesis is probably a more common form of evolution and speciation than anagenesis.

French

Domaine(s)
  • Évolution (Biologie)
DEF

Événement de séparation de deux clades, c'est-à-dire de deux groupes de taxons qui partagent le même ancêtre.

OBS

[Les taxons constituent des] unités formelles représentées par un groupe d'organismes à chaque niveau de la classification.

Spanish

Save record 1

Record 2 2009-04-28

English

Subject field(s)
  • Genetics
CONT

Conservation genetics is a mixture of ecology, molecular biology, population genetics, mathematical modeling and evolutionary systematics (the construction of family relationships). It is both a basic and an applied science. Scientists must first understand the genetic relationships of the organisms under study. ... management techniques must then be applied by wildlife managers to preserve biological diversity in these species. ... Information about the genetic diversity of the [plants and] animals under study helps scientists and managers in forming strategies to preserve and protect the diversity of plants and animals worldwide.

CONT

Conservation genetics [is] concerned with the population genetics principles involved in the maintenance of feral species. The maintenance of the populations depends on inbreeding, outbreeding, effective population size, deleterious mutation, reproductive success, adaptation to captivity, reintroduction, vagility, outbreeding depression, extinction, etc.

French

Domaine(s)
  • Génétique
CONT

[...] un but important de la génétique de la conservation est l'identification des gènes ou des régions de génome responsables des traits phénotypiques qui peuvent augmenter l'adaptation locale ou les traits qui peuvent faciliter l'adaptation au futur changement climatique. Cette connaissance peut alors être utilisée pour concevoir des stratégies de conservation donnant priorité à la conservation des populations qui ont une fréquence élevée de ces gènes ou d'une combinaison de ces gènes.

Spanish

Save record 2

Record 3 2000-03-30

English

Subject field(s)
  • Genetics

French

Domaine(s)
  • Génétique
DEF

Ensemble des processus évolutifs, tels que sélection, migration et dérive génétique, qui permettent à une population de s'ajuster au milieu ou aux contraintes de la domestication par un changement des fréquences alléliques.

Spanish

Save record 3

Record 4 1994-07-15

English

Subject field(s)
  • Vegetable Crop Production
CONT

According to "World Conservation Strategy" primitive population of crop and their wild relatives are an important source of pest and disease resistance and of adaptation to difficult environment and of other agronomically valuable characteristics.

French

Domaine(s)
  • Production légumière

Spanish

Save record 4

Record 5 1988-01-21

English

Subject field(s)
  • Ecology (General)
  • Environmental Studies and Analyses
CONT

"There are three issues involved when considering the capability to evolve in impact significance. One is the immediate survival of the population. The second one is the persistence of vigour and evolutionary adaptation of a population in the face of a changing environment; in other words, the adaptability already within the population. The third one is the continued creation of evolutionary novelty".

French

Domaine(s)
  • Écologie (Généralités)
  • Études et analyses environnementales
CONT

"Dans l'interprétation de l'importance des incidences, il faut tenir compte de trois facteurs relatifs à la capacité d'évolution. Le premier concerne la survie immédiate de la population. Le deuxième, le dynamisme et l'adaptation évolutive d'une population dans un milieu en évolution, c'est-à-dire la capacité d'adaptation innée des populations. Le troisième, c'est la création constante de nouvelles possibilités évolutives."

Spanish

Save record 5

Record 6 1988-01-21

English

Subject field(s)
  • Ecology (General)
  • Environmental Studies and Analyses
CONT

"There are three issues involved when considering the capability to evolve in impact significance. One is the immediate survival of the population. The second one is the persistence of vigour and evolutionary adaptation of a population in the face of a changing environment; in other words, the adaptability already within the population. The third one is the continued creation of evolutionary novelty. "

French

Domaine(s)
  • Écologie (Généralités)
  • Études et analyses environnementales
CONT

"Dans l'interprétation de l'importance des incidences, il faut tenir compte de trois facteurs relatifs à la capacité d'évolution. Le premier concerne la survie immédiate de la population. Le deuxième, le dynamisme et l'adaptation évolutive d'une population dans un milieu en évolution, c'est-à-dire la capacité d'adaptation innée des populations. Le troisième, c'est la création constante de nouvelles possibilités évolutives."

Spanish

Save record 6

Record 7 1988-01-19

English

Subject field(s)
  • Ecology (General)
  • Environmental Studies and Analyses
CONT

"There are three issues involved when considering the capability to evolve in impact significance. One is the immediate survival of the population. The second one is the persistence of vigour and evolutionary adaptation of a population in the face of a changing environment; in other words, the adaptability already within the population. The third one is the continued creation of evolutionary novelty. "

French

Domaine(s)
  • Écologie (Généralités)
  • Études et analyses environnementales
CONT

"Dans l'interprétation de l'importance des incidences, il faut tenir compte de trois facteurs relatifs à la capacité d'évolution. Le premier concerne la survie immédiate de la population. Le deuxième, le dynamisme et l'adaptation évolutive d'une population dans un milieu en évolution, c'est-à-dire la capacité d'adaptation innée des populations. Le troisième, c'est la création constante de nouvelles possibilités évolutives."

Spanish

Save record 7

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