English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Ecology and adaptations of the tiger beetle Pentacomia egregia (Chaudoir) (Cicindelinae: Carabidae) to Central Amazonian floodplains.

MPS-Authors
/persons/resource/persons56570

Adis,  Joachim
Working Group Tropical Ecology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

External Ressource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Amorim, M. A., Adis, J., & Paarmann, W. (1997). Ecology and adaptations of the tiger beetle Pentacomia egregia (Chaudoir) (Cicindelinae: Carabidae) to Central Amazonian floodplains. Ecotropica, 3(2), 71-82.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000F-E26D-C
Abstract
The diurnal soil-dwelling cicindelid species Pentacomia egregia (Chaud.) inhabits Central Amazonian inundation forests. Adults pass the aquatic phase of several months duration on tree trunks. Experiments under simulated flood conditions with young beetles in climate-controlled chambers and in natural climatic conditions showed: (1) males have a shorter life span than females, (2) the mean temperature of the air influences gonad development in females but not in males, males will even copulate with immature females; (3) the presence of soil prevents gonad dormancy in females and continuous oviposition is observed. Results suggest, that the availability of soil is the primary or proximate (eco)factor which induces a rapid maturation of gonads and subsequent oviposition in females. The mean temperature of the air induces gonad dormancy and enhances longevity in females during inundation. It apparently has evolved as a cue for an adaptation to survive inundation as an ultimate factor. An increase in the mean ambient air temperature is correlated with seasonal changes in the water-level of the Solimões-Amazon River and the general climate in Central Amazonia