Thread subject: Diptera.info :: mosquito-gnat ?
Posted by pat_der2003 on 31-03-2012 19:47
#1
4 km from Paris center, France. riverbanks of La Seine, March 24 2012.
3-4 mm
Edited by pat_der2003 on 31-03-2012 19:48
Posted by Xespok on 31-03-2012 19:51
#2
Chironomidae, around Cricotopus, male.
Posted by pat_der2003 on 31-03-2012 19:57
#3
Many thanks Gabor !!! ;)
If I remember well my university cursus, Chironomidae, if they are abundant, are not a good sign for water quality ?
Or are they usually met in big rivers, independent of water quality ?
Thanks !!:)
Posted by John Carr on 31-03-2012 19:58
#4
Many species are sensitive to pollution, some tolerate pollution. Some are very abundant in polluted water bodies.
Posted by pat_der2003 on 31-03-2012 20:09
#5
John Carr wrote:
Many species are sensitive to pollution, (...)
Oh, it's a new information to me ! Many thanks for your answers !! ;)
So what is called in french "indice biotique" (Biotic indice ?) should identify water larvae to species level to qualify water quality ? (sorry my cursus was in the 80's, a bit old for nowadays !! B))