Density, Aggregation, and Survival of the Bush Tick, Haemaphysalis longicornis Neumann (Acari: Ixodi
June 27th, 2008 | by admin |Density, Aggregation, and Survival of the Bush Tick, Haemaphysalis longicornis Neumann (Acari: Ixodidae) in the Off-Host Phase.
The survival of all stages of Haemaphysalis longicornis was investigated at different densities and at three levels of humidity. Larvae survived longer when the density was higher and/or the size of a cluster was larger. However, in nymphs and adults, there was no significant relationship between the density and the survival period. These results suggest that the effect of advantage gained from a higher density and/or from taking part in a cluster differed between stages. Furthermore, the fact that the survival period of larvae and nymphs was influenced by cohort suggests that a maternal effect as well as aggregation influences the survival of immature ticks.
Tsunoda T.