Autumn Grasshopper

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ИНО, 07.10.2015 17:33

As I wrote here in the next topic, yesterday we had the last day of the phenological summer. And although the weather was just wonderful: far beyond +20, sunny, windless, but when I heard a very active stridulation of some grasshoppers from the reeds, I was very, very surprised. After all, abnormally warm weather is weather, and males of all the species I know should have passed away due to old age. In any case, in previous years, in October, I never heard the strangulation of grasshoppers, only very rarely - stem crickets (by the way, yesterday I also heard trumpeters, but as it should be for this period - two goons per kilometer of the route). And these grasshoppers, judging by the sound, in the reeds were quite a lot. They couldn't sneak up on any of them - they were very careful, and the dry reeds rustled treacherously under their feet. There is only a record of stridulation (at the same time you can see the biotope): https://www.youtube.com/watch?v=LY5ar4jmmyA&feature=youtu.be

However, the camera has a filthy microphone, so the sound turned out to be terribly distorted. In fact, its tonality is much higher. In general, there is a monotonous "electric" buzzing, characteristic of a huge variety of grasshoppers, from metriopera to onkonotus, but very loud, at the level of tettigonia. Vehicles can be heard in the background. The shooting time is 17: 18.

This post was edited INO-07.10.2015 17: 44

Comments

08.10.2015 1:00, ИНО

As for this Ruspolia: in the summer, I don't remember exactly now, in June or July, I only heard them in the deep twilight. Not a single male chirped in the sunlight. With the definition of the species in this case, the iron singers were caught. Before that, I thought that this is a very rare animal, because there was only one female, completely by accident, and for many years of mowing - zero. It turned out that they only climb the grass at night, before that, probably somewhere near the ground or in the wilds impassable. According to the video, the natural question is: where does the author's confidence in the species of grasshopper come from? if he'd caught it later, that was one thing, but he could have just assumed. And the sound of IMHO is not really reliably distinguished from the same metriopter and many others. Although it may be real for a person with a musical ear. Here you will definitely not dig into this video: the singer is in the frame, and the time of day is correct: https://www.youtube.com/watch?v=-uvQ2eGLqyY. So it is still possible that the grasshopper you are looking for is Ruspolia nitidula, but only adjusted for a much changed daily activity regime compared to summer.

Roma, what does the North Pole have to do with it? The rate of aging of grasshoppers depends on the climate, but certainly in the other direction. It is only in Nikolaev such anomaly - and scolias at you do not grow old, and grasshoppers. If there were no frost, they would probably live forever.

08.10.2015 17:24, Hierophis

I wonder if there will be links to scientific articles about the dependence of grasshopper aging on the climate in the other direction? ))) Is this something about cryobiosis? )
Simply, I did not keep tethygonias and decticus at home for a long time, but mantises and dybok - more than once, so they all usually live until November with good feeding, and on the aquaforum or even here someone wrote that the mantis lived until January.
Well, locust such as skates, fillies, in general in December in nature is not uncommon.

Somehow it seems to me that for weakened and really aged and worn-out grasshoppers, cold, and especially freezing, is a negative factor that contributes to the weakening of the body, overspending of energy, resources and all sorts of diseases. And if there were no frosts, or rather when they are not present until December and temperatures are kept in the morning at least 5C mostly, then it's easy to meet a grasshopper at the end of November.
And if there were no frost at all, then we would have completely different grasshoppers

08.10.2015 18:32, ИНО

So this is a well-known fact of animal biology: the life span of an individual is inversely proportional to the ambient temperature. The connection is very simple: higher temperature - faster metabolism - faster aging. Tested on spiders, fish, mice, rats and many other organisms. I don't see any reason why grasshoppers should have it any other way. Naturally, we mean small deviations of the temperature from the optimal one. And negative values are beyond the lower limit of endurance for most grasshopper species, so this is from a different opera. The data obtained in terrariums - nothing at all, because it is widely known that in captivity, many species of animals live many times longer than in nature. The maximum established life expectancy is also a very far indicator from everyday reality. I won't hide it: I have no idea what it is like for tettigonians. But I know that at the end of August we can't hear them at all, and it's certainly not the cold that's to blame. Here we are dealing not just with some lonely singer-aksakal, but with mass stridulation.

08.10.2015 19:29, Hierophis

Some controversial well-known facts, to put it mildly )) I'm talking about warm-blooded animals in the first place, for example, mice, rats, as well as many other organisms, including humans)) with a decrease in T, the environment, on the contrary, activates the metabolism, begins to tremble, abnormal chains of energy metabolism, fat, peptide, and so on are activated, such fat does not lead to health benefits and longevity ))
Insects yes, but again, I suspect that for this they must have acc. mechanisms..
Well, in general, if your theory is correct, then where are your late scolias, maculae, tetragonia and others? For some reason, we have at T +38C for three weeks in a row scolias maculata in late August massively, and even in early September what will come across, and tettigonia at the end of August is generally a mass species..

I won't hide it: I have no idea what it is like for tettigonians. But I know that at the end of August we can no longer hear them at all"
in general, some kind of pity, there are few things that emphasize the despondency of the beginning of September as tettigonias singing from the thickets of cyclohena =0