There are two cool articles on two related topics, but the articles themselves don’t deal with the area in which these topic overlap. Confused? Here’s a quick description of the two articles:
One article is on the change in fecundity cost of Wolbachia infections in a population of Drosophila simulans. Wolbachia are bacterial symbionts which can do all kinds of cool stuff to their hosts, including preventing infected males from mating with uninfected females (cytoplasmic incompatibility) and causing male zygotes to die before fully developing (male killing). Wolbachia can really do a number on sex ratios and can override chromosomal sex determination systems. Jonathan Eisen has more.
The other paper deals with sex determination in lizards (it’s currently embargoed, but Nobel Intent has a summary). Different species of lizards use different mechanisms for sex determination (reviewed here), including XY, ZW, and temperature dependent. The authors of this study report that a species of lizard that uses a ZW system (males are ZZ and females are ZW) is also sensitive to temperature dependent sex determination. At high temperature (above 34°C) half of the ZZ individuals develop into females. This is a cool example of a mix between chromosomal and environmental sex determination.