In bullfrogs, larger males have territories that afford the eggs more protection from leech predation. In other cases, females prefer larger males because they fertilize more eggs. This is not because of differences in sperm supply, however, but because there is mechanically a better match of ...
Juvenile American bullfrogs and native amphibians overlap in their diet composition and in their habitat use, suggesting the existence of potential competition between the two species. Ontogenetic dietary–habitat shifts in the American bullfrog, local conditions, and trophic interactions should be ...
North America is huge, meaning we can’t even begin to cover the full scope of wildlife biodiversity in full. However, national boundaries can help break the continent down into smaller pieces and identify the best places for wildlife. TheUnited Statespossesses the most biodiversity in North Amer...
Fig. 10. Summary of the overall effects of increased environmental temperature on the physiological and biochemical changes in American bullfrog crossbreeds (BT = Body temperature; FRAP = Total antioxidant power; PR = Pulse rate; VR = Ventilation rate; H2O2 = Hydrogen peroxide; MDA = Malondialdehy...
The life cycles of species of Hepatozoon that occur naturally ineasterngarter snakes, Thamnophis sirtalis sirtalis, were studied in the mosquito Culex pipiens in various amphibians, including northern leopard frogs, bullfrogs, gray treefrogs,American toads, and blue-spotted salamanders, and in natrici...
The American bullfrog, Lithobates catesbeianus (Shaw, 1802), is considered one of the world's worst invaders because of its potential to affect native fauna adversely, especially amphibians, through predation, competition, breeding interference, and disease transmission. Here, the potential impact of...