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Biomedical subjects

W L Bidlingmayer

Publications and source records attributed to W L Bidlingmayer.

8 recordsLinked to original sources
PubMed1995

Effect of wind velocity on suction trap catches of some Florida mosquitoes.

The correlations between wind velocity and suction trap catches of mosquitoes when taken at 15-min intervals during the night were studied at 2 locations. Although normal mosquito flight speeds are approximately 1 m/sec, trap catches were reduced about 50% by winds of 0.5 m/sec and 75% at 1.0 m/sec. Trap catches were inversely related to winds of all velocities and even the lightest winds reduced trap catches. No evidence was found for a threshold below which wind velocity had no effect.

Animals↗
PubMed1994

How mosquitoes see traps: role of visual responses.

The visual responses of female mosquitoes during appetitive and attraction flights to conspicuous features of their environment were reviewed. These studies showed for both flights long-range orientation (positive) could be followed by a short-range response (negative) to avoid the goal. In conjunction with the optomotor anemotactic response, appetitive flights are controlled by visual orientation toward more or less distant targets, which permits females to make a wider search than upwind flight along could accomplish. Most attraction flights are controlled primarily by visual and olfactory cues. The influence of visual targets upon mosquito flight behavior and the effect of this behavior upon trap catches is discussed.

Animals↗
PubMed1987

The distribution of female mosquitoes about a flight barrier.

A 6.1 m long suction trap, with multiple air inlets located on its upwind, top, ends and downwind sides, was placed on a freely pivoting raft moored in a large borrow pit. Air inlets on the downwind side made larger captures than those on the upwind side. Inlets near the top edge of the trap captured larger numbers than those at the bottom. Larger proportions of Culex nigripalpus and Cx. erraticus accumulated behind the horizontal and vertical edges of the trap than did other species. Mosquitoes near the ends of the trap could choose whether to fly over or around the trap; most Cx. nigripalpus and Cx. erraticus flew over the trap while only Cx. pilosus favored going around the ends. Other species appeared to fly over and around the trap in approximately equal numbers. No evidence was found that flight patterns changed with differing wind velocities.

Animals↗
PubMed1985

A telescoping collection cup changer for insect traps.

A description is provided of a time interval insect sampler that has been used in suction traps but would also be useful with light traps. The device is capable of taking 27 successive samples. Principle of operation involves 2 telescoping concentric cylinders. The collection cups, mounted in the motor driven inner cylinder, are closed by the wall of the outer cylinder as the inner cylinder spirals inward about a helix screw.

Animals↗
PubMed1985

The measurement of adult mosquito population changes--some considerations.

Day-to-day changes in adult mosquito populations are difficult to measure due to the interactions between specific mosquito behavior, environmental influences upon behavior, and the mode of operation of the sampling technique. Mosquito responses to terrain features and various meteorological factors are briefly summarized with the object of improving our understanding of the samples provided by several classes of sampling techniques. The two major environmental influences upon the composition of a sample are the terrain features and several meteorological factors. As each sampling site is unique, a sample provides little direct information of the numbers of mosquitoes within the much broader area it is supposed to represent but it can reflect population changes at the site. However, the population changes usually are masked by meteorological effects upon flight activity. Data from Florida field studies were utilized to adjust trap catches to compensate for meteorological conditions during the catch period to provide more standard samples.

Animals↗