Why zebrafish represent a miracle for the economics of lab-testing?—?and why rats are overpriced. Maybe the biggest advantages of zebrafish, though, is the species’ expansive reproductive capacity. “One of the benefits is the number of offspring they can produce,” says Cara Moravec, a postdoctoral fellow in the genetics department at the University of Wisconsin–Madison. “A single female can lay several hundred eggs per week,” according to Sirotkin.
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