It is inevitable that some people will wonder, is it only human beings who have heat stroke? The answer, of course: not necessarily. The weather has gradually warmed up, and now it has entered a three-volt day, and the temperature in most areas has reached thirty degrees and above at any moment. The weather is hot, everyone in the outdoors do not pay attention to sun protection measures will be prone to heat stroke, "Internal Medicine" will be defined as : "in the temperature or humidity is high, impermeable environment, due to the body temperature regulation central dysfunction or sweat gland failure, as well as too much water, electrolyte loss, resulting in the central nervous system or cardiovascular dysfunction as the main manifestation of acute diseases." ”
Not only humans, but also small animals everywhere in life will also have heat stroke, and some will even die of heat stroke! Spiders are typical examples, so why is that? How do they avoid this when they encounter high temperatures? What aspects of spiders will affect spiders other than heat stroke? With these questions in mind, we can explore from the following three aspects:
<h1 class="pgc-h-arrow-right" data-track="22" > why spiders suffer from heat stroke</h1>
For spiders, I believe that everyone knows, and in life, spider webs can be seen everywhere. Indoors and outdoors, it seems to be everywhere, if you are good at observation, then you will definitely find that some spider webs are not spiders, so where did they go? Don't worry, it may be waiting for prey on the side, it may be hiding from the sun in the shade, or it may die because the temperature is too high! So why?
Because spiders are warmer animals like insects. Their body temperature is not like us relying on the physiological role of the body to maintain a constant between 35 ° C and 37 ° C, very susceptible to changes in the influence of external temperature, so when the temperature rises, the spider body temperature also rises, when the temperature is too high, the protein degeneration in the body will cause serious consequences, that is, death due to heat stroke.
Although the body of the warming animal does not have a thermoregulatory function, on the other hand, they do not have to consume energy in order to maintain body temperature. In general, the energy required for thermostatic animals to sustain life is one-tenth of that of the same volume of thermostatic animals; but at the same time, in order to maintain an appropriate body temperature at all times, they must take other measures or avoid sunlight to survive.
<h1 class="pgc-h-arrow-right" data-track="8" > two ways of thermoregulation of spiders</h1>
In the book "Spider Naturalism", it is shown that there are more detailed studies of reptile lizards regarding thermoregulation methods of tempering animals. For example, lizards in Costa Rica, when their body temperature rises to 38 ° C in the sun, they will enter the shade to hunt prey; when the body temperature drops to 36.5 ° C, they will appear in the sun. In the "Spider Naturalism" when it comes to the suitable temperature range of spiders, the general situation is that when the body temperature exceeds 40 ° C, it will have obvious negative effects, and even general paralysis, once it reaches 50 ° C, it will inevitably heat death! Despite this, some knotted spiders still often make webs in direct sunlight and also bask in the sun during the day.
They regulate body temperature in roughly two ways:
One is to adjust the direction of the cobwebs. Garden spiders, for example, weave webs in open spaces with sun exposure, and also stop in the middle of the webs during the day to bask in the sun, but the direction changes according to the seasons: in the middle of summer, it stays on the web with the back of its body facing south; in autumn, when the net is knotted, it changes to the abdomen to the south. Because the back of the garden spider is silver, it can reflect the sunlight in the summer and prevent the body temperature from rising. In autumn, the black belly is used to increase the absorption rate of sunlight.
The second is to change the direction or posture of the body. For example, dish spiders and the like usually lie flat and rest under the dish-like web. The body then moves with the increase in temperature, the head gradually facing the sun, and then the abdomen droops, so that the body axis is parallel to the direction of direct sunlight, so as to reduce the surface area of the body that is exposed to the sun.
Supplement: When the temperature drops, the garden spider will not only change the direction of the net, but also tilt the abdomen at a right angle with the direction of sunlight exposure to improve the absorption rate of sunlight.
<h1 class="pgc-h-arrow-right" data-track="23" > effects of high temperatures on other aspects of spiders</h1>
Due to the high or low temperature, it will affect the speed of metabolism in the spider's body, which will affect its hunting, mate hunting and egg hatching rate. In the case of female tarantulas, it is a type of spider known for its maternal love, often sticking the egg sac to the end of the abdomen to protect it, so it is easy to see the female tarantula sunbathing with the egg sac. It allows the oocyst to bask in the sun, which should be aimed at accelerating the development of the egg and allowing it to hatch early. Maternal love is great, and sometimes she will do her best for her cubs, even life. Female spiders are sluggish during the egg sac, vulnerable to predators, and vulnerable to egg damage when hunting, so they prefer to starve rather than hunt. It can be seen that shortening the egg carrying period is very important for female spiders.
In addition, solarium prevents the formation of parasites in the egg sac and improves the hatching rate of the eggs.
<h1 class="pgc-h-arrow-right" data-track="24" > summary</h1>
In life, there are many places where humans and animals are connected, and spider heat stroke is just one of them. Not only are humans unbearable with heat, but even spiders are inevitable, so it seems that the joys and sorrows of humans and animals have something in common. In the summer high temperature season, we must pay attention to heat prevention, take care of ourselves, and prevent heat stroke.