Beetle behavior

I don't know if there is a similar topic, most likely not , but I think to find out why this sand, you will have to find out everything yourself Just like Fabre with scarab pears. You need to disassemble several cocoons, maybe there is some pattern in finding the pupa in relation to this mound, and also see how the larva makes a cocoon.

But about cannibalism, it is better to put the cocoons in another place, since such things are Well, or feed the bronzes with live food.

I don't know if there is a similar topic, most likely not , but I think to find out why this sand, you will have to find out everything yourself Just like Fabre with scarab pears. You need to disassemble several cocoons, maybe there is some pattern in finding the pupa in relation to this mound, and also see how the larva makes a cocoon.

But as for cannibalism, it is better to put the cocoons in another place, since such things are Well, or feed the bronzes with live food.

there are no more larvae left, and how can you track them when they are underground, and it is not known when they have a desire to start "construction"

Well, Fabre also traced In the book The Life of Insects about scarabs about this is.
In theory, it is necessary to force the larva to pupate in the corner of a glass container or even in a small cube of glass.
Intersense observation in fact, why such grains of sand - it is difficult to understand, for ventilation is unlikely, the ground and so well passes air.
Alas, here it is necessary to disassemble at least one cocoon, and it is still not a fact that the pupa will die in this case, although it is open, it is not so tender, I disassembled the cocoons of aurat, and the pupae survived, only the humidity is normal.

Well, Fabre also traced In the book The Life of Insects about scarabs about this is.
In theory, it is necessary to force the larva to pupate in the corner of a glass container or even in a small cube of glass.
Intersense observation in fact, why such grains of sand - it is difficult to understand, for ventilation is unlikely, the ground and so well passes air.
Alas, here it is necessary to disassemble at least one cocoon, and it is still not a fact that the pupa will die in this case, although it is open, it is not so tender, I disassembled the cocoons of aurat, and the pupae survived, only the humidity is normal.

to survive, they survive, but the elytra spread out badly, the cocoon, you can say, gives them a shape.
In the place where these grains of sand are the thickness of the cocoon is minimal, except for ventilation, nothing comes to mind

I found this picture on the Web. The reason for the phenomenon became interesting. Can anyone explain the reason for such a massive accumulation of floaters in one place?

Pictures:

dtr2r9bw92c.jpg — (1.36мб)

And these are definitely floaters, and not vertyachki?

It seems plavuntsy, but I will not say for sure.

These are turntables.

This is probably a manifestation of mating behavior.

I didn't find a similar topic, so please enlighten me if you have any .
Looking at the cocoons of bronzes (Potosia affinis), they developed in my soil, so the cocoons came out of the ground, and I noticed an interesting thing. some of the many cocoons have a kind of "bump" of large grains of sand on the side. The question arose, why is this modification needed? Maybe the larvae start with this to build a cocoon, or such a "window" is needed for ventilation?

And another question, is cannibalism normal for them?


maybe there is some literature on this?

It seems that the same Fabre wrote that his larvae of one of the species of bronzes (as far as I remember, it was about Oxytherea funesta) often built a cocoon, "growing" to some solid body, for example, a small stone. Surely, this body was used as a kind of foundation for building a cocoon. So, read the relevant section of Fabre, and you can reproduce or modify some of his experiments.

As for ventilation, I don't think that's a very convincing explanation. I didn't hold the affinis cocoons in my hands, but in many other bronzes, the cocoon, whatever it is encrusted with on the outside, is "hermetically" plastered on the inside with a thin, even layer of excrement - in fact, in many ways the cocoon is kept on it. This layer, most likely, is practically not permeable to air, but for a not very intensively breathing pupa, the stock that is there should be enough.

I didn't hold the affinis cocoons in my hands, but in many other bronzes, the cocoon, whatever it is encrusted with on the outside, is "hermetically" plastered on the inside with a thin, even layer of excrement - in fact, in many ways the cocoon is kept on it. This layer, most likely, is practically not permeable to air, but for a not very intensively breathing pupa, the stock that is there should be enough.

from the inside, it looks more like a tub stopper with smeared edges (but most of it is outside)

Pictures:

__________. png — (17.77 k)

Probably only after observing the construction of cocoons and noticing how the larva forms this growth, it will be possible to come up with something..
And Fabre, when describing the construction of the cocoon, did not mention anything like that... Here, after all, is not just a pebble or a hard surface, but clearly specially collected large grains of sand...

What material should I choose for the experiment?

As is known, mating games are observed in malashek beetles at the level of the species. But I have observed something similar between different views. Is interspecific reproduction possible here, or was it just overindulgence?

Pictures:

25.jpg — (303.59 k)

Well, in general, this is not uncommon in beetles, you can observe not only mating games, but even mating of different species, and not always males with females ))))

Today I have collected larvae of Lucanus cervus, and they are all at the pre-pupation stage. what does it mean, they will be like this until spring?

Yesterday, April 12, in a meadow, three kilometers from the village, I was lucky enough to observe (and collect some) water beetles and beetles (plavuntsov, vertyachek, vodolyubov, gladyshey, etc.), although the nearest reservoir (the Dnieper River) is seven kilometers away from this place. Dear experts, who can tell you if this is an anomaly, a mass flight or mating games? But I'm still leaning towards the second option.

This post was edited by Vasily L. - 13.04.2015 10: 02

Yesterday, April 12, in a meadow, three kilometers from the village, I was lucky enough to observe (and collect some) water beetles and beetles (plavuntsov, vertyachek, vodolyubov, gladyshey, etc.), although the nearest reservoir (the Dnieper River) is seven kilometers away from this place. Dear experts, who can tell you if this is an anomaly, a mass flight or mating games? But I'm still leaning towards the second option.

It's not an anomaly. All the insects listed by you are excellent fliers, and they settle in reservoirs just in this way. In the spring, this is normal. At the same time, if any flat surface glistens in the sun on the flight path - the hood (roof) of a car, the freshly painted roof of a building, a greenhouse frame, etc. - they (apparently confused with the water surface) dive and fall on it (like, "diving") .

has anyone besides Fabre studied the development of T-shirts? If there is Russian-language literaturearticles?

Does anyone know if the great oak barbel (Cerambyx cerdo) has already started growing in my area? If so, I would like to hunt it today or tomorrow. Can you bait it with oak juice? Thank you for your answers!

Yesterday, April 12, in a meadow, three kilometers from the village, I was lucky enough to observe (and collect some) water beetles and beetles (plavuntsov, vertyachek, vodolyubov, gladyshey, etc.), although the nearest reservoir (the Dnieper River) is seven kilometers away from this place...

Personally, I consider the use of the epithet "water" to insects a mockery of the Russian language. If on business - do not be surprised in the future, if you meet water insects (and sometimes coastal ones) at a distance of 40-50 km from the nearest reservoir - this is normal, reservoirs appear-they dry up, they are often not connected to each other, and insects need to settle.

Does anyone know if the great oak barbel (Cerambyx cerdo) has already started growing in my area? If so, I would like to hunt it today or tomorrow. Can you bait it with oak juice? Thank you for your answers!

In fact, I will be grateful for any advice about the barbel of Ukraine (the time of summer, where you can meet, what to bait, fishing methods and other features of behavior and collection), because the season has already begun, and I know almost nothing about them (there is no literature yet, so I also thank you for links (only the site is known http://www.zin.ru/Animalia/Coleoptera/rus/index.htm )). Thank you all so much for your answers!

In fact, I will be grateful for any advice about the barbel of Ukraine (the time of summer, where you can meet, what to bait, fishing methods and other features of behavior and collection), because the season has already begun, and I know almost nothing about them (there is no literature yet, so I also thank you for links (only the site is known http://www.zin.ru/Animalia/Coleoptera/rus/index.htm )). Thank you all so much for your answers!

Vasily, dig around about sites in this topic:
http://molbiol.ru/forums/index.php?showtopic=140305
About the literature in this article:
http://molbiol.ru/forums/index.php?showtopic=54556
A very good online library is located at this link: http://ashipunov.info/shipunov/school/sch-ru
By itself: barbels should be looked for mainly in clearings (logs, etc.), on tree trunks, on flowers. Some species fly well to the light

In the spring (in May), I found these bombers while cleaning garbage in a suburban area (about 20-30 pieces were sitting in a pile), I took a couple of pieces to my terrarium, I haven't looked there for a long time, now there is definitely one there. Could they have survived to this point (then how long do they even live?) or is it a new generation (then why only one?)
[attachmentid()=242936][attachmentid()=242937]

I think 99% of them are beetles that were launched in May, so why not live the whole season? I think that most likely they do not have a single-season development cycle, so even if they bred, the offspring would only be for the sl. season, unless of course diapause is needed for development..

Is it possible to somehow influence the eggs/larvae of bronzes, so that the beetles acquire an unusual color?

Maybe it's better to go straight to the pupae? Slightly elevated or lowered temperature, for example. Of course, much more depends on the desired result. I don't recall any outstanding aberrations in our bronzes.

Maybe it's better to go straight to the pupae? Slightly elevated or lowered temperature, for example. Of course, much more depends on the desired result. I don't recall any outstanding aberrations in our bronzes.

if on pupae, then it will not be transmitted to the offspring, and not only our intreat

Depending on what is considered outstanding, the same aurata has a lot of color variations, from bright red to purple, some of them are very rare in nature. However, I don't know if they are related to temperature, diet, genetics, or anything else. I recall a case in my student summer practice: on one side of the Seversky Donets River, the aurats were green, on the other - copper-red.