See Species at Risk Act of Canada.
The reduction in relative fitness, and therefore genetic contribution to future generations, of one genotype compared to another.
The difference the mean value of a quantitative trait found in a population as a whole compared to the mean value of the trait in the breeding population.
The rapid increase in frequency by natural selection of an initially rare allele that also fixes (or nearly fixes) alleles at closely linked loci thus reduces the genetic variation in a region of a chromosome.
A method used in population viability analyses where the effects of parameters on the persistence of populations are determined by testing a range of possible values for each parameter.
sequential Bonferroni correction
A method, similar to the Bonferroni correction, that is used to reduce the probability of a Type I statistical error when conducting multiple simultaneous tests.
Chromosomes that pair during meiosis but differ in the hererogametic sex.
A locus that is located on a sex chromosome.
Selection due to differential mating success either through competition for mates or mate choice.
A case usually caused by low marker polymorphism in markrecapture studies in which a novel capture is labeled as a recapture due to identical genotypes at the loci studied.
Short interspersed nuclear elements.
single nucleotide polymorphism (SNP)
A nucleotide site (base pair) in a DNA sequence that is polymorphic in a population either due to transitions or transversions and can be used as a marker to assess genetic variation within and among populations. Usually only two alleles exist for a SNP in a population.
See stepwise mutation model.
See single nucleotide polymorphism.
A group of organisms with a high degree of physical and genetic similarity, that naturally interbreed among themselves and can be differentiated from members of related groups of organisms.
Species at Risk Act of Canada (SARA)
Legislation (passed in 2002) to prevent wildlife species from becoming extinct and secure the necessary actions for their recovery. It provides for the legal protection of wildlife species and the conservation of critical habitat.
The ideas of what constitutes a species, such as reproductive isolation (BSC), or monophyly of a lineage (PSC).
The spatial scale encompassing an entire species’ distribution.
Simple sequence repeats. See microsatellite.
A polymorphism that is maintained at a locus through natural selection.
Selection for a phenotype with a more intermediate state.
stepping stone model of migration
A model of migration in which the probability of migration between nearby or adjacent populations is higher than the probability of migration between distant populations.
stepwise mutation model (SMM)
A model of mutation in which the microsatellite allele length has an equal probability of either increasing or decreasing (usually by a single repeat unit, as in the strict one-step SMM).
The presence of a random variable in determining the outcome of an event.
A term generally used in fisheries management that refers to a population that is demographically independent and often represents a subunit (e.g., MU) of an ESU.
Short tandem repeat. See microsatellite.
Groups within a population delineated by reduced levels of gene flow with other groups.
A taxonomically defined subdivision within a species that is physically or genetically distinct, and often geographically separated.
A statistical rule that states that the probability of ni mutually exclusive, independent events occurring is equal to the sum of the probabilities of each n event.
Allelic combinations found at closely linked loci that affect related traits and are inherited together. An example of a supergene is the major histocompatibility complex (MHC), which in humans contains more than 200 genes adjacently located over several megabases of sequence on chromosome 6.
A chromosome, often present in varying numbers, that is not needed for normal development, lacks functional genes, and does not segregate during meiosis. These small chromosomes, which are also called B chromosomes, are present in addition to the normal complement of functional chromosomes in an organism.
The practice of removing a subset of individuals from a wild population for captive breeding and releasing the captive-born offspring back into their native habitat to intermix with wild-born individuals and increase population size or persistence.
Populations or species that occupy the same geographic area.
A shared derived trait between evolutionary lineages. A homology that evolved in an ancestor common to all species on one branch of a phylogeny, but not common to species on other branches.