Complex sentence: Different kinds of prey are found in different abundances depending on location, for example, Antarctic residents mostly feed on Euphausiids, however this is mainly effective for lunge-feeders, whereas gulp-feeders, like the right whales, feed primarily on copepods.
Split into simpler sentences: Different kinds of prey are found in different abundances depending on location, and each type of whale is adapted to a specialized way of foraging. For example, Antarctic residents mostly feed on Euphausiids, however this is mainly effective for lunge-feeders, whereas gulp-feeders, like the right whales, feed primarily on copepods.