Biologists have discovered that this process affects the natural selection and evolution of fishes in Lave Victoria, Africa. The physics of light had in fact led to speciation. The cichild species,living in Lake Victoria, have evolved and specific vision tuned to suit the environment they live in. Remember that natural selection always favours traits which excel in a local environment. Picture a murky lake image...
Fish that live in shallow water and deep water portray a variation in habits and nature. Hypothetically,due to the things fish in shallow water see, they are able to prey on other organisms and avoid predators at the same time in a region of water near shore. This is where their reigning zone is. The opposite is true too in deep water regions for fishes that stay there. This is where the genetic variation lies : shallow water fish have higher sensitivity to blue light; deep water fish have higher sensitivity to red light. Now we see the rift in the population and how simple it is created even without allopatric speciation. However,this divergence is further amplified by the sexual selection. As mentioned, shallow wat
er fish would only do well near shore line and would suffer the alienation of other deep water fish when mating partners are chose. Highly beleived that, fishes living in the deep regions are unlikely to possess an optimal sensetivity to blue colouration. Thus, leaving the "blue" fishes alone and selecting the "red" fishes. The occurrance of natural selection is everywhere and keeps the evolution of all living organisms in an ever-changing state. Futhermore,the introduction of human activity would nonetheless be a crucial factor to ourenvironment and biodiversity. If this prolonges, divergance of species would be unavoidable and a species might eventually seperate to form two entirely different species.
By 41952559 (zckry)
Reference link :
http://evolution.berkeley.edu/evolibrary/news/090301_cichlidspeciation
(Video included)
