1998
Life history patterns of Onychogomphus uncatus (Charpentier) (Anisoptera: Gomphidae)
Publication
Publication
Odonatologica , Volume 27 - Issue 1 p. 71- 86
The results of a 4-yr study are reported. Data from Surber-samples of 3 running waters in southern France were compared with results from field enclosure experiments. Egg development lasted about one month under field conditions and two weeks at 25°C in the laboratory. O. uncatus has usually but not strictly 13 larval instars and a 3-yr life cycle. Each year emergence started in early June. The emergence curve was typical of a summer sp. Several aspects of seasonal regulation are discussed. The monitoring of population structure indicated a high mortality of final instar larvae (up to 99%) during winter. This mortality differed between the sample sites of one of the running waters. These differences depend on prey availability and on larval density. A field enclosure experiment revealed density dependence of larval size and growth.
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Odonatologica | |
CC BY-SA 4.0 NL ("Naamsvermelding-GelijkDelen") | |
Organisation | Societas Internationalis Odonatologica |
C. Schütte, P. Schridde, & F. Suhling. (1998). Life history patterns of Onychogomphus uncatus (Charpentier) (Anisoptera: Gomphidae). Odonatologica, 27(1), 71–86. |