التفاصيل البيبلوغرافية
| العنوان: |
On the threshold of dispersal: hitchhiking on a giant fly favours exaggerated male traits in a male-dimorphic pseudoscorpion |
| المؤلفون: |
David W. Zeh, Jeanne A. Zeh |
| المصدر: |
Biological Journal of the Linnean Society. 108:509-520 |
| بيانات النشر: |
Oxford University Press (OUP), 2013. |
| سنة النشر: |
2013 |
| مصطلحات موضوعية: |
education.field_of_study, Reproductive success, Ecology, media_common.quotation_subject, Population, Zoology, Biology, Competition (biology), Sexual dimorphism, Sexual selection, Biological dispersal, Chela, Mating, education, Ecology, Evolution, Behavior and Systematics, media_common |
| الوصف: |
The evolution of exaggerated male traits is frequently driven by competition between males to control resources critical for female survival and/or reproductive success. For flightless arthropods specializing on patchy habitats, dispersal agents may represent one such critical resource. The Neotropical pseudoscorpion, Semeiochernes armiger, disperses to new habitats by attaching to the giant timber fly, Pantophthalmus tabaninus, as it ecloses from pupal boreholes within decaying Ficus trees. In a study that combined field observations of mating with experimental removal of individuals from a large, pre-dispersal population, our morphometric analyses revealed that S. armiger is among the most highly sexually dimorphic pseudoscorpions known, with males possessing unusual, triangular-shaped pedipalpal chelae (hands) and a male-specific, dimorphic chela peg that exhibits threshold trait expression. Several lines of evidence indicate that extreme sexual dimorphism in S. armiger results from male competition to monopolize pantophthalmid bores as strategic sites for inseminating females on the verge of dispersal. Sexually dimorphic pedipalpal characters were significantly larger in males located in and around pantophthalmid boreholes, compared with males collected at the periphery of the pantophthalmid emergence zone. Removal of pseudoscorpions resulted in a significant decline in pedipalpal size of males associated with pantophthalmid bores, followed by a rebound in size after collected individuals were returned to the tree. Most significantly, field observations of mating indicate that this competition translates into intense selection for exaggerated male traits, with all traits of the sexually dimorphic chelae exhibiting highly significant sexual selection differentials in males. © 2013 The Linnean Society of London |
| تدمد: |
0024-4066 |
| DOI: |
10.1111/bij.12011 |
| URL الوصول: |
https://explore.openaire.eu/search/publication?articleId=doi_________::575879f55f30119568cc2e61a654370b
https://doi.org/10.1111/bij.12011 |
| Rights: |
OPEN |
| رقم الانضمام: |
edsair.doi...........575879f55f30119568cc2e61a654370b |
| قاعدة البيانات: |
OpenAIRE |