An emergence study ofPetalura gigantea(Odonata: Petaluridae)

Autor:	Ian R. C. Baird, Shelley Burgin
Rok vydání:	2013
Předmět:	education.field_of_study geography geography.geographical_feature_category biology Ecology Population Zoology biology.organism_classification Odonata Swamp Petalura gigantea Habitat Insect Science Cohort Petaluridae education Ecology Evolution Behavior and Systematics Sex ratio
Zdroj:	International Journal of Odonatology. 16:193-211
ISSN:	2159-6719 1388-7890
DOI:	10.1080/13887890.2013.798580
Popis:	Emergence studies in Odonata provide information on the behaviour, ecology and fundamental demographic parameters in population studies. This paper reports on a study of sex ratio at emergence, pattern and duration of the emergence season, and potential cohort splitting in Petalura gigantea. Sex ratio at emergence varied among years, habitat patches and swamp types. Across all collections, sex ratio varied significantly from a 1:1 ratio, with a bias towards females. The duration of the emergence season varied between sites and years, from at least 45 to at least 70 days, potentially commencing by late October and extending into early January and possibly beyond. Although some evidence suggested cohort splitting, it was not confirmed. Observations of spatially and temporally aggregated emergence clusters are consistent with observed oviposition patterns of individual females, suggesting cohort emergence. Observations of mortalities at emergence and of emergence location are provided; the latter should assi...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::aeac55a8e9dbb5d66b44fa67605e554b https://doi.org/10.1080/13887890.2013.798580 Zobrazit plný text záznamu