Night Distribution Of Certain Species Of Coleoptera As Indicated By Captures In A Light Trap At Quena

Abstract

The night distribution of nineteen species over a whole trapping period can be considered under the following headings: a. Early flyers b. Species with two peaks of activity. The effect of light of low intensity, temperature and humidity on the activity of those species is discussed. c. Species with three peaks of activity. The night distribution of above mentioned species has been compared in each group of the nights. a. Species with one peak in group A and two in group B. This section includes 2 species, while the reverse was found in four species. b. Species with two maximum flight activity in group A and one in group B. This division includes one species whereas the reverse was found in five species. c. Species with similar or different night distribution in both the two groups. These two sections include four and two species respectively. Eighteen species were chosen to study their night distribution on nights with high and low catches. They can be divided into: (a) Species with the same or different night distribution on both nights with high and low catches, (b) Species with the same night distribution on night distribution on night with high catches and different on nights with low catches.