Common yellow-toothed cavy levels in males. Testosterone levels and aggression levels in males are not correlated. In fact females avoid above average aggressive males. Common yellow-toothed cavy The common yellow-toothed cavy (Galea musteloides) is a species of rodent in the family Caviidae, closely related to the domesticated guinea pig. It is found in Argentina, Bolivia, Chile, and Peru. It's karyotype has 2n = 68 and FN = 136. "G. musteloides" is the most common and widely found member of "Galea", and is present at elevations ranging from 20 to 5000 m above sea level. It has yellow teeth. A recent study reveals there
Rock cavy pile, she indirectly chooses the builder as her mate. Females weigh 700-800 g and give birth to one or two young only, but several litters per year are common. The gestation period averages 75 days. The newborn cavies weigh 90 g. The placenta for a rock cavy is similar to other hystricomorph rodents. They have several lobes that are lined with blood vessels and undergo a counter-current blood flow. There are blood vessels running from the mother along the placenta and then vessels running from the fetus back over the mothers vessels. This allows for a better flow of oxygen