Following the arrival of gentoo penguins along the West Antarctic Peninsula, native Adelie penguins have experienced population declines. However, researchers are unsure whether increased food competition among the two species or climate change is ultimately to blame.
Asian carp pose a major risk to Lake Erie's ecosystem. New computer models suggest these invasive fish could soon throw off the balance of the natural food chain and account for nearly a third of the lake's total fish population.
Tiny chameleons have surprisingly powerful tongues, researchers reveal in a new study. Like all small animals, these lizards need to consume more energy per body weight to survive. Therefore they have to shoot out their tongues unusually fast and far in order to compete with larger relatives for insect meals.
Humpback whales are spending some extra time up north in Alaska this season. Experts say the whales are slow to arrive at breeding grounds in Hawaii because of possible food competition or El Niño disruptions.
Japanese macaques are exposed to various stressful situations in the wild, including rank fights and mating competitions. Researchers recently took a closer look at how genetics ultimately control the release of stress hormones in these animals.
Marine animals are altering their diets and natural habitat range as a result of climate change. For instance, melting sea ice is opening new waters to humpback and fin whales, which could lead to increased food competition among the areas' native species.