Mechanisms of reproductive suppression in female pine voles (Microtus pinetorum).

In co-operatively breeding birds and mammals, philopatric females are often reproductively suppressed. Many studies have focused on the functional significance of reproductive suppression, but further investigation of the mechanisms involved is required for a complete understanding of this process. This study investigated whether reproductive suppression in non-reproductive female pine voles (Microtus pinetorum) occurs as a result of lack of gamete maturation or lack of increase in LH.

Statistical appraisal of the weight-wing length relationship of mosquitoes.

The relationship between wing length and body weight of mosquitoes was examined by comparing the fit of regressions using logarithmic and cubic transformations. A two-parameter line using a double logarithmic transformation provided the best fit, and we found no evidence to justify the use of wing length cubed as a transformation. Wing length was not directly proportional to body weight, but rather increased at a lesser rate than did body weight.

A new method for monitoring mosquito oviposition in artificial and natural containers.

A new method is described for the direct measurement of Aedes albopictus, Ae. atropalpus, Ae. triseriatus and Orthopodomyia signifera oviposition in artificial and natural containers.

Penetration rate of two pesticide carriers at a large used-tire storage facility in Chicago, Illinois.

During August 1987, a large and concentrated infestation of Aedes albopictus was discovered on the property of a tire recapper and gasket manufacturer in Chicago, IL, in a densely populated urban environment. The infestation called for special abatement procedures because of the large number of tires and the varied ways they were stacked. An effective method for delivering pesticides into the cavity of each tire is described.