Alberta Ministry of Justice and Solicitor General. Ecologically, Western Painted Turtle distribution is best described as suitable ponds and small lakes at low elevations in the drier subzones of Bunchgrass, Ponderosa Pine, and Interior Douglas-fir biogeoclimatic zones Meidinger and Pojar ; BC Ministry of Forests and Range undated.
Major watersheds are indicated by shading.
Turtle range narrows north to south toward the west, with native range limited to the Missouri watershed in southeastern Alberta Figure 6. Environmental Sex Determination - Developmental Biology. Somers and R.
They conjectured that disruptive selection produced by variation in the environment could result in an evolutionary transition from ESD to GSD Bull, Vogt, and Bulmer, These chemicals block the conversion of testosterone to estradiol during development so each sex offspring can be produced at all temperatures.
This compounds already high surface water use e. Habitat loss, both of productive pond habitat and natural nesting habitat, is a primary threat to the Western Painted Turtle in parts of its range.
It arose from the need for a single, official, scientifically sound, national listing of wildlife species at risk. January One cause of TSD is the enzyme aromatase.