Biologist Marshall Mackey (Marshall McCue ) from University of Arkansas (University of Arkansas ) undertook a study of the biological mechanism that enables some snakes to starve for up to two years.
For that, he spent 168 days observed 62 individuals of three snake species (distant relatives): Royal Python, white snake and Texas gramatnica.
Macku followed physiological, compositional and morphological changes of the snakes and found that snakes can reduce their metabolic rate by 72%! For this they use a special survival strategy in the absence of food, is not peculiar to any of vertebrates.
The rate at 72% is shocking, as “snakes and so consume little energy, and we still didn’t know how they manage to reduce energy consumption to such a low level”, ” says Marshall.
What’s even more amazing is the fact (also found by Makku) that snakes on loss from 9.3% to 24.4% of initial body weight continued to grow in length (especially increased size of the head – just like those snakes).
Day 168 to study rattlesnakes showed a record decline in the intensity of metabolism. He was only 28 per cent. Snakes reduced the metabolism to the bar in 55%. At the same time, the pythons, the maximum decrease in the intensity Continue reading
Why are people scared of snakes? Why is it so contemptuously call them reptiles, blaming in all sins possible – from the first, inherited from eve and Adam? It’s not only in pathological mobility, visual “slipperiness” and a cold glance, which cause many instinctive disgust. The fact that some of these reptiles to humans are a real threat. Perhaps the fear of the snake – an echo of the genetic memory of those times, when there were no vaccines and medications, so almost every bite of poisonous snakes was deadly for the victim.
To be honest, there’s not that snake would dare attack the person itself – usually they attack only in self-defense. Although there are a particularly aggressive individuals who don’t need any special occasion to show your teeth ” in the full sense of the word. But the anger – is one thing, and the degree of toxicity – more. Today, when there are medications help the bitten people, some “bastards” ceased to be so dangerous, though the joy of a close acquaintance with them is ever going to do. But what kind of snake is anyway to bypass the tenth road, if you do not want to prematurely part with life?
It is widely known that not one snake on land in its ability to kill cannot be compared with the inhabitants of the ocean. The so-called sea serpent, which is often compared to the Cobra, more poisonous than Continue reading
Almost all snakes reproduce sexually, with the participation of female and male. Only certain species are capable of parthenogenesis, i.e. the reproduction is not transmitted sexually, and from unfertilized eggs without the participation of a male. There among the snakes, as a rare exception, and true hermaphrodites, i.e. individuals who are simultaneously female and male. Such exceptional case was recorded on the small island of Queimada-Grande, South America. There were found the snake, dubbed the island bothrops, among which, in addition to ordinary females and males, meet bisexual individuals who make up the majority of the population. These individuals are females, while the ovaries are the male copulatory organs and Mature testes. Such individuals may in some cases play the role of females and to breed, and the males are fertilizing other females (ordinary or hermaphrodite). The existence in the population of the island bothrops such unusual females is so efficient, the need for normal males has dropped, and their share in recent years has declined.
The female from the male in the overwhelming majority of snake species difficult to distinguish. The serpent the visible Continue reading