22182614
not annotated - annotated - LINNAEUS only
Short-Term Population Redistribution of Pseudacteon tricuspis (Diptera: Phoridae) From Point Source Releases.
There is a need for quantitative data on patterns and rates of movement of organisms to understand their movement behavior and predict their rates of spread. Opportunities for studying movement of biological control agents are presented during release programs. However, despite these opportunities, patterns and range of dispersal are often not considered. For example, information about effects of wind on dispersal patterns and heterogeneities in rates of movement is critical to predicting future range expansion of biological control agents and determining proximity of multiple releases. Here, the pattern and range of movement of a fire ant parasitoid, Pseudacteon tricuspis Borgmeier, was investigated by performing a series of mass-release-resighting experiments. Flies were released at a central location surrounded by radial transects containing trays of host ants at variable distances along four axes. Resighted flies were censused at these trays at 30 min intervals, up to 2 h postrelease. The dispersal pattern of P. tricuspis in the short term was consistent with a simple diffusion model. On average, 50% of P. tricuspis dispersed =<10 m, and 95% dispersed =<29 m. Diffusion rates were variable, depending on release densities, but tended to decline over time after release. Drift of dispersing flies was detected in several trials, and was attributed to prevailing wind dynamics. Data from this assessment of the short term redistribution pattern of P. tricuspis could be useful in determining proximity of releases of this, and other fire ant parasitoids.
Ann file
T1 Species 40 61 Pseudacteon tricuspis
N1 Reference T1 Taxonomy:378805
T2 Species 772 793 Pseudacteon tricuspis
N2 Reference T2 Taxonomy:378805
T3 Species 1141 1153 P. tricuspis
N3 Reference T3 Taxonomy:378805
T4 Species 1237 1249 P. tricuspis
N4 Reference T4 Taxonomy:378805
T5 Species 1580 1592 P. tricuspis
N5 Reference T5 Taxonomy:378805
T6 Species 751 759 fire ant
N6 Reference T6 Taxonomy:13686 Solenopsis invicta
T7 Species 1665 1673 fire ant
N7 Reference T7 Taxonomy:13686 Solenopsis invicta