Sentences with phrase «low effective population size»

Comparison of these sequences with present day humans suggests that Neandertals had a long term low effective population size.

Many higher order vertebrates have low effective population sizes resulting from reduced efficiency of selection [10], suggesting that neutral or mildly deleterious mutations such as some transposon insertions can easily reach fixation.

Not exact matches

In 2008 a federal recovery plan stated that the white abalone «was driven to such low levels during the height of the commercial fishery that adults do not occur in high enough densities to successfully reproduce, contributing to repeated recruitment failure and an effective population size near zero.»

Applying high - throughput sequencing technologies to obtain sequences from most of the genome, we calculated that the passenger pigeon's effective population size throughout the last million years was persistently about 1/10, 000 of the 1800's estimated number of individuals, a ratio 1,000 - times lower than typically found.

Genetic studies using samples along the distribution range of both subspecies and based on a few dozen nuclear markers have revealed loci of relatively high divergence (0.3 — 1.2 %) between subspecies embedded in a genome otherwise characterized by low levels of differentiation and high levels of bidirectional gene flow [21], [24]--[26], likely facilitated by high effective population sizes, high dispersal, and a relatively short generation time [21], [24]--[26].

The tip branch effective population size is lowest in Finland (∼ 12,000), consistent with previous observations22, 23, and highest in Kent (∼ 191,000) and in the Netherlands (∼ 184,000).