Fig 1.

Hypothesized path diagram considering Ae. aegypti age, wing length, blood meal size, and the number of eggs. (A) The Wolbachia-uninfected field strain; (B) the two strains with Wolbachia (wMel and wAlbB strains). The notations of the path diagram are as follows: age is an exogenous variable, whereas wing length, blood meal size, Wolbachia density, and the number of eggs are endogenous variables. The arrows represent the directional relationship, and circled double arrows represent the variance and the residual errors of exogenous and endogenous variables, respectively.