Biologists from the University of Guelph, Canada, analyzing more than 55 000 species of shells, hav

Fruit Growing Vegetable Crop Breeding shells
Biologists from the University of Guelph, Canada, analyzing more than 55 000 species of shells, have concluded that the rarity of the distribution of marine molluscs left-handed shell can be explained by their migration to the ocean currents. The researchers presented the results of the study of the Canadian Conference of the Canadian Zoological Society, wrote Science Now.
During the largest study to date are analyzed about two-thirds of all species of the gastropod. The authors found that "lyavostranostta" in different groups of shells occurred during the evolution of at least 100 times, but this feature did not become shells dominant. In those rare cases when left twisted shells shells were distributed, they belonged to the ground, not marine gastropods.
According shells to the authors, the rarity of left-handed seashells can be explained by the fact that they migrate to the ocean currents and the spread of large areas. shells Land snails, in contrast, usually travel far and are able to form a compact area of chiral minorities.
Left-handed forms are found among snails with individuals, shells special populations, species, and even within families. Hamper the spread of the fact that gastropods may be crossed only by representatives of their chirality. There are exceptions to this rule - for representatives of the genus Amphidromus, chirality is sexual dimorphism.
Acquisition of snails of one or another chirality scientists work-related gene nodal. shells However, researchers have shown that the non-dependence on its action on the shell may be attached to the desired orientation.
Read more: In Tel Aviv found dangerous pests - Giant African snails Heliciculture - snail farming in artificial conditions Snail from Spain are a major threat to British gardens in Australia shells found "lost world" French farmers growing snails prepares revolution shells Previous cosmetics bumblebees take over the nests of birds after scientists discovered fruit that will deliver us from flu and hypertension
Apitoksinoterapiya - treatment with bee venom Prof. Hristo shells Bozukov: SAA should shells have its own budget (INTERVIEW) NOA: earn new depot for the purchase of lambs Overview of Agrarian week 17 to 21 March Minister Grekov will open Forest Week 2014 (forthcoming)
x