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Dragonfly nymph, what's wrong with it?

Community and Forum → Other questions. Insects topics → Dragonfly nymph, what's wrong with it?

rockhero, 26.05.2020 22:53

Nymph dragonflies found in the course of hydrobiological research as later tried to find out like it was Aeschna (rocker) It weighed 0.8078 g. It lived in the laboratory for 7 months. They tried to feed him bokoplavom whether he ate them or not is difficult to say ( while watching exactly did not eat) regularly changed the water (gaining a new one in the rates) user posted image


user posted image


but yesterday he stopped moving and an unknown thing started sticking out of his chest

user posted image

user posted image


Forumchane explain that yes how and why the dragonfly did not eat and is it dead?

Comments

26.05.2020 23:04, rockhero

Sorry for the size of the photo I can't figure out how to make normal

27.05.2020 0:26, ИНО

Even to determine the death of a person, a full-time medical examination is required. And here's a dragonfly. In addition, you have said very little about the conditions of detention. How gas exchange was provided. Was there somewhere to get out of the water?

You can see a lot of dead bokoplavs, which is not good. It was necessary to regularly remove the corpses, they are decomposing. Yes, and the cause of this pestilence would not hurt to establish, perhaps she also killed the dragonfly.

Transfer to a container with clean water, preferably with aeration. Suddenly it fades. Although unlikely.

27.05.2020 10:07, rockhero

I lived in a high jar with a stick that I could stay without water the jar is closed with a lid with many holes bokoplavy were bought already dead corpses were removed regularly.

28.05.2020 14:29, ИНО

eek.gifYou'd probably try to feed her dog food, too. It remains to be noted that there is an almost complete lack of knowledge about the biology of dragonfly larvae. Why did you even have this idea?

28.05.2020 17:28, molek

Dragonfly larvae hunt mobile prey. Dead bokoplavov, respectively, it is not food. The "unknown thing" that started to "stick out" is the so-called mask.
Simply put, its jaws, which it grabs prey. Usually they are tightly pressed and not visible. You can watch a video on the Internet about how she hunts.
The mask began to stick out, most likely because after death, the muscles relaxed and nothing kept it pressed against the underside of the head.

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