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Evolution of Signals: Genetic Architecture, Natural Selection and Adaptive Accuracy
Norwegian University of Science and Technology, Faculty of Natural Sciences and Technology, Department of Biology.
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
NTNU, 2011.
Series
Doctoral theses at NTNU, ISSN 1503-8181 ; 2011:55
Identifiers
URN: urn:nbn:no:ntnu:diva-12514ISBN: 978-82-471-2636-3 (electronic ver.)ISBN: 978-82-471-2635-6 (printed ver.)OAI: oai:DiVA.org:ntnu-12514DiVA: diva2:412875
Public defence
2011-02-11, 00:00
Available from: 2011-04-26 Created: 2011-04-26 Last updated: 2011-04-26Bibliographically approved
List of papers
1. Contrasting responses of ornaments and life-history traits to inbreeding in guppies
Open this publication in new window or tab >>Contrasting responses of ornaments and life-history traits to inbreeding in guppies
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(English)Manuscript (preprint) (Other academic)
Identifiers
urn:nbn:no:ntnu:diva-12516 (URN)
Available from: 2011-04-26 Created: 2011-04-26 Last updated: 2011-04-26Bibliographically approved
2. A deleterious effect of purging
Open this publication in new window or tab >>A deleterious effect of purging
(English)Manuscript (preprint) (Other academic)
Identifiers
urn:nbn:no:ntnu:diva-12517 (URN)
Available from: 2011-04-26 Created: 2011-04-26 Last updated: 2011-04-26Bibliographically approved
3. Direct selection at the blossom level on floral reward by pollinators in a natural population of Dalechampia schottii: full-disclosure honesty?
Open this publication in new window or tab >>Direct selection at the blossom level on floral reward by pollinators in a natural population of Dalechampia schottii: full-disclosure honesty?
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2010 (English)In: New Phytologist, ISSN 0028-646X, E-ISSN 1469-8137, Vol. 188, no 2, 370-384 p.Article in journal (Refereed) Published
Abstract [en]

P>Both floral rewards and advertisements can be important in the attraction of pollinators, but few studies have separated the individual contributions of rewards and advertisements to fitness. Here, we investigated selection by pollinators on individual blossoms in Dalechampia schottii. This Neotropical vine, endemic to the Yucatan Peninsula, rewards bees by secreting fully visible, deep-blue resin from a gland subtended by two conspicuous petaloid bracts that may play the role of advertisement. We used contextual analysis to build a fitness function for four morphological traits of individual blossoms: the amount of the reward as measured by gland area; the size of the advertisement trait as measured by bract length; the flower-pollinator fit as measured by the shortest distance between reward and stigma; and the potential for self-pollination as measured by the shortest distance between anthers and stigma. Larger gland area and increased potential for self-pollination directly increased the seed production of individual blossoms. However, bract size or flower-pollinator fit did not influence the number of seeds produced by blossoms. Therefore, in this Dalechampia species, pollinators seem to select directly on the reward of individual blossoms but not on the advertising bracts.

Keyword
Dalechampia schottii, fitness function, euglossine bees, multivariate selection, natural selection, pollination, selection gradient
Identifiers
urn:nbn:no:ntnu:diva-12518 (URN)10.1111/j.1469-8137.2010.03429.x (DOI)000282225000008 ()
Available from: 2011-04-26 Created: 2011-04-26 Last updated: 2011-04-26Bibliographically approved
4. Pollinators and seed predators generate stabilizing selection on Dalechampia blossoms
Open this publication in new window or tab >>Pollinators and seed predators generate stabilizing selection on Dalechampia blossoms
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(English)Manuscript (preprint) (Other academic)
Identifiers
urn:nbn:no:ntnu:diva-12519 (URN)
Available from: 2011-04-26 Created: 2011-04-26 Last updated: 2011-04-26Bibliographically approved
5. Adaptive accuracy and the adaptive landscape
Open this publication in new window or tab >>Adaptive accuracy and the adaptive landscape
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(English)Manuscript (preprint) (Other academic)
Identifiers
urn:nbn:no:ntnu:diva-12520 (URN)
Available from: 2011-04-26 Created: 2011-04-26 Last updated: 2011-04-26Bibliographically approved

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