Latest Character displacement Stories
Canadian scientists say they have conducted the first experiment that shows the evolution of new species impacts the environment. Scientists at the University of British Columbia created mini-ecosystems in large aquatic tanks using different species of three-spine stickleback fish and saw substantial differences in the ecosystems within 11 weeks. Stickleback fish originated in the ocean, but began populating freshwater lakes and streams following the last ice age.
By Huntley, John Warren Yanes, Yurena; Kowalewski, Michal; Castillo, Carolina; Delgado-Huertas, Antonio; Ibanez, Miguel; Alonso, Maria R; Ortiz, Jose E; de Torres, Trinidad Abstract.- The hypothesis of limiting similarity, which postulates that morphologically and/or ecologically similar species will differ enough in shape, size, or other variables to minimize competition, has been controversial among ecologiste and paleoecologists.
Finches on the Galapagos Islands that inspired Charles Darwin to develop the concept of evolution are now helping confirm it - by evolving.
The Three-Spined Stickleback, Gasterosteus aculeatus, is a fish native to much of northern Europe, northern Asia and North America. It has been introduced into parts of southern and central Europe. Three subspecies that are currently recognized by the IUCN are Gasterosteus aculeatus aculeatus, which is found in most of the species range, and is the subspecies most strictly termed the Three-Spined Stickleback; its common name in England is the Tiddler, although "tittlebat" is also sometimes...
- An uxorious, effeminate, or spiritless man.
- A timorous, cowardly fellow.