The blue antelope (Hippotragus leucophaeus) was an African antelope with a bluish-gray pelt related to the sable and the roan antelope. The last blue antelope was shot around 1800, just 34 years after it was first described ...
Plants & Animals
Apr 15, 2024
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Fossilized mating insects are an irreplaceable find for understanding the evolution of mating behaviors and life history traits in the deep-time record of insects.
Paleontology & Fossils
Apr 3, 2024
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Due to its economic growth and large population, the People's Republic of China is widely viewed as a rising economic and military superpower. But declining fertility rates and increased life expectancies over the last few ...
Social Sciences
Apr 4, 2024
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Some Australian desert mammals use distinct strategies to promote evolutionary fitness in response to changing environmental conditions over short timescales, according to a new study.
Evolution
Apr 16, 2024
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A new evaluation from The Australian National University (ANU) of the number of swift parrots left in the wild has confirmed their population size is likely only a few hundred and declining rapidly.
Plants & Animals
Mar 25, 2024
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In population genetics and population ecology, population size (usually denoted N) is the number of individual organisms in a population.
The effective population size (Ne) is defined as "the number of breeding individuals in an idealized population that would show the same amount of dispersion of allele frequencies under random genetic drift or the same amount of inbreeding as the population under consideration." Ne is usually less than N (the absolute population size) and this has important applications in conservation genetics.
Small population size results in increased genetic drift. Population bottlenecks are when population size reduces for a short period of time.
Overpopulation may indicate any case in which the population of any species of animal may exceed the carrying capacity of its ecological niche.
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