| prey fish returned to forster's tern colonies suggest spatial and temporal differences in fish composition and availability. | predators sample the available prey community when foraging; thus, changes in the environment may be reflected by changes in predator diet and foraging preferences. we examined forster's tern (sterna forsteri) prey species over an 11-year period by sampling approximately 10,000 prey fish returned to 17 breeding colonies in south san francisco bay, california. we compared the species composition among repeatedly-sampled colonies (≥ 4 years), using both relative species abundance and the compositi ... | 2018 | 29543811 |