The life cycles of Boyeria irene and Onychogomphus uncatus (Odonata: Aeshnidae, Gomphidae) in western Spain: A biometric study
| Autor: | Manuel Ferreras-Romero, Ulf Norling, Tatiana Velasco-Villanueva, Francisco Campos |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Odonata seasonal regulation Aeshnidae Gomphidae 010607 zoology Zoology Onychogomphus uncatus onychogomphus uncatus 01 natural sciences dragonfly life cycle spain voltinism Trophic level Ekologi larval sizes Larva Ecology biology Voltinism permanent streams odonata biology.organism_classification Dragonfly 010602 entomology boyeria irene Boyeria irene QL1-991 Spain Insect Science aeshnidae gomphidae |
| Zdroj: | European Journal of Entomology, Vol 115, Iss 1, Pp 684-696 (2018) |
| ISSN: | 1802-8829 1210-5759 |
| DOI: | 10.14411/eje.2018.067 |
| Popis: | Co-occurrence of species with similar trophic requirements, such as odonates, seems to depend both on them occupying different microhabitats and differing in their life-cycles. The life cycles of the dragonflies Boyeria irene and Onychogomphus uncatus were studied in two consecutive years, mainly by systematic sampling of larvae in seven permanent head courses that constitute the upper basin of the River Agueda, western Spain, in the central part of the ranges of these two species. The size ranges of the last five larval stadia of both species were established based on biometric data. The eggs of the egg-overwintering aeshnid hatched in late spring and early summer and for the gomphid hatching peaked in middle-late summer. Both species showed mixed voltinism with "cohort splitting". B. irene had a dominant three-year development (partivoltinism), with some developing in two years (semivoltinism). O. uncatus requires four, sometimes three years to complete development (all partivoltine). B. irene larvae spent the winter before emergence in the last three, maybe four stadia, as a "summer species". O. uncatus mainly behaved as a "spring species", most larvae spending the last winter in the final larval stadium. |
| Databáze: | OpenAIRE |
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