Five Natural Hybrid Combinations in Minnows (Cyprinidae)

"Five Natural Hybrid Combinations in Minnows (Cyprinidae)" by Frank B. (Frank Bernard) Cross is a scientific study from the 1960s that investigates natural minnow hybrids in North America. It focuses on five different hybrid combinations, like Chrosomus erythrogaster mixed with Notropis cornutus frontalis, detailing their physical characteristics that fall between their parent species. The study shows how a drought in Kansas and Arkansas made different minnow species breed, resulting in these hybrids. It describes each hybrid's body shape, color, and inner organs to help identify them. The book explains how changes in the environment can affect fish species and their ability to create hybrids.