Emergence patterns of Coenagrion hastulatum (Charpentier) in northern Germany (Zygoptera: Coenagrionidae)

Abstract

The emergence patterns were followed closely at a pond E of Braunschweig. The emergence period lasted 24 days and the EM50 was reached after 11 days. Due to its emergence phenology. C. hastulatum is classified as a summer species. The date of emergence was negatively correlated with head width in 9 2 but not in <J cj. In tJ <? , a negative correlation occurred between the date of emergence and the body mass at emergence. These findings are contrasting previous studies and are discussed with respect to sexual differences. The results are compared with the emergence patterns of other odonates.