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Continuous and stepwise oocyte production in Libellulidae (Anisoptera)
Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS).
Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS).
University of Mainz.
2010 (English)In: Odonatologica, ISSN 0375-0183, Vol. 39, no 2, p. 107-119Article in journal (Refereed) Published
Abstract [en]

Compared to other insect groups, libellulids have a rather high mean number of ovarioles. In addition, the mean ovariole diameter differs greatly between and within species. In general, 2 different types of ovariole arrangement exist: (1) all developing oocytes mature and equal in size; in some species without, and in others with, surrounding connective tissue and (2) oocytes displaying gradual maturation, with only the outermost ovarioles mature. These differences have ecological consequences: the first arrangement occurs in spp. that have stepwise egg production. These spp. will lay one or more clutches, after which an interclutch interval of ovariole regrowth follows. Spp. with the second arrangement have continuous egg production and are able to lay at least some eggs all the time, reducing the length of interclutch intervals. However, no direct connection between mate-guarding strategies and ovariole arrangements can be seen. Nevertheless, it is believed that the process of ovariole maturation differs between these groups. It is concluded that ovary morphology in libellulids may exhibit evolutionary fixed traits, although the whole picture still remains complex. The ovariole arrangement may have a crucial impact on the reproductive ecology of the species.

Place, publisher, year, edition, pages
Utrecht, Netherlands: Societas Internationalis Odonatologica , 2010. Vol. 39, no 2, p. 107-119
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:hh:diva-6024ISI: 000278533300002Scopus ID: 2-s2.0-77953244844OAI: oai:DiVA.org:hh-6024DiVA, id: diva2:353789
Available from: 2010-09-28 Created: 2010-09-28 Last updated: 2018-03-23Bibliographically approved

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Karlsson, MariaSahlén, Göran

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CiteExportLink to record
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