Affordable Access

Publisher Website

Ecology ofAmblyomma neumanni(Acari: Ixodidae)

Acta Tropica
Publication Date
DOI: 10.1016/j.actatropica.2009.04.013
  • Amblyommaneumanni
  • Seasonality
  • Life Cycle
  • Distribution
  • Genetic Variation


Abstract The life cycle of Amblyomma neumanni was described studying the seasonal distribution of free-living stages and parasitic phases during two consecutive years. Development periods of engorged ticks under different photoperiod conditions were recorded. Larvae of A. neumanni have the peak of abundance in autumn. Nymphs reach the peak in winter. Females were collected on cattle from autumn to late spring. The seasonal distribution pattern of females showed a bimodal curve, with a peak in autumn and other during early and middle spring. The engorged females exposed at shortest photoperiod regimen (10 h light–14 h dark) under both laboratory and field conditions undergo morphogenetic diapause, expressed as a delay in the oviposition. It is concluded that females of A. neumanni that feed and copulate in autumn undergo morphogenetic diapause, and they will lay eggs in spring, simultaneously with the females that feed and copulate in this season. Climate niche analysis shows that adequate suitability for A. neumanni depends mainly from temperature (mean, absolute maximum and minimum, and mean temperature in wettest and driest quarters) as well as from rainfall in warmest and coldest quarters. Sequences of 16S rDNA gene belonging to different populations of A. neumanni, showed no intraspecific genetic differentiation.

There are no comments yet on this publication. Be the first to share your thoughts.


Seen <100 times

More articles like this

The life-cycle ofAmblyomma variegatum(Acari: Ixodi...

on International Journal for Para... Jan 01, 1995

Acaricidal activity of thymol on larvae and nymphs...

on Veterinary Parasitology Jan 01, 2011

The life cycle of Amblyomma neumanni Ribaga, 1902...

on Experimental and Applied Acaro... February 1999
More articles like this..