Identification of Orthoptera (grasshoppers, crickets, etc.)

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01.11.2011 8:25, PVOzerski

Actually, a possible subject of research

. In principle, you can check this: whether the change in color depends on a change in the surrounding background or simply on age. In a decent university - the topic of a course course, in a less decent one-a bachelor's attestation work. Instead of caudata, you can use cantans - there is the same effect there. Should I give my students a free ride, or something? The research algorithm is more or less clear.

To begin with, we take only imago-a good sample in the middle of summer (when only winged individuals appear). First, we put everyone on a green background (fresh branches of plants with leaves) And we start once in a few days to plant several individuals on a background of yellow leaves (you can specially arrange chlorosis for plants), and then we look at the dynamics of color. Well, based on the results, we decide whether to check two things - the reversibility of yellowing and the ability to change the color of larvae.

BTW, I once met a male T. cantans not even yellow, but red-brown in autumn on a reddened aronia aronia.

This post was edited by PVOzerski - 01.11.2011 15: 01

01.11.2011 23:38, Dichelima

... possible subject of research .

Tell me, PVOzerski, are you aware of any scientific papers that attempt (or are already not just attempts, but good results) to develop methods for determining species of orthoptera from the genus Chortippus, especially from the problem group brunneus-biggutulus-mollis, based on DNA analysis? As far as I understand, there are already such methods of molecular biology that allow us to determine paternity (fingerprinting), identify individual people from their blood samples, and also distinguish species of living organisms from each other. If such methods are not very expensive, but only require simple devices (for PCR) and reagents, then it would be possible to send samples to the laboratory and get the results-determination of hard-to-distinguish insects by morphology to a species.

This post was edited by Dichelima - 01.11.2011 23: 42

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03.11.2011 21:11, Dichelima

Just don't overestimate the possibilities of such a hike. The level of differences can be estimated in this way, but the taxonomic rank of the resulting groups is unlikely. Gomphocerini s. l. is an extremely uniform group, even karyologically. In my opinion, acoustics and the morphology associated with acoustics can give more-although this is just my opinion, nothing more.

Thank you, but let me clarify - if I understand correctly, it is impossible to determine the species from a DNA sample from a captured insect if there is no DNA sample for comparison. And you can only find out the degree of difference in the DNA of different species among themselves. So, if there is an insect in the jar and it is not clear what kind of species, then you will need to find such a sample, the similarity with which is 100% - this will be the species. But to do this, you need to have samples of all the species from this genus for comparison-right? I apologize if I didn't make it clear.

PS: I am interested in whether the species whose photos are presented on OSF Online is a multi-humped fat man? Its end of the ovipositor is bifurcated, unlike the one posted by Zlopastnyi Brandashmyg.

This post was edited by Dichelima - 03.11.2011 21: 15

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