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I just read that an article has been published about sex determination in Zebrafish: "Hypoxia affects sex differentiation and development, leading to a male-dominated population in Zebrafish (Danio rerio)". Environmental Science and Technology, Vol.40, p.3118-3122, 2006.
Allegedly this research gives evidence that hypoxia (low concentrations of oxygen) develops more males in broods of Zebrafish.
I could not stop wondering if oxygen levels is also the real cause behind sex ratios in apistos. I know that Römer's studies show temperature as the most important effect on sex ratios, with increasingly more males with higher temperature for most species. Does anyone know if oxygen was monitored in this study? If it was not, then temperature could just be a way of varying oxygen levels, because waters ability to contain oxygen varies with temperature. The higher temperature the less oxygen is in the water.
Any thoughts?
Lars
Allegedly this research gives evidence that hypoxia (low concentrations of oxygen) develops more males in broods of Zebrafish.
I could not stop wondering if oxygen levels is also the real cause behind sex ratios in apistos. I know that Römer's studies show temperature as the most important effect on sex ratios, with increasingly more males with higher temperature for most species. Does anyone know if oxygen was monitored in this study? If it was not, then temperature could just be a way of varying oxygen levels, because waters ability to contain oxygen varies with temperature. The higher temperature the less oxygen is in the water.
Any thoughts?
Lars
