Scientists have found that bluegill sunfish receive the highest energy return from large Daphnia, an intermediate return from medium Daphnia and the smallest return from small Daphnia. If you were to stock aquaria with equal proportions of small, medium, and large Daphnia, but vary the density of Daphnia from very low to very high, how do you think bluegills would react? Check all that apply.

Question

_____ Bluegills would consume a larger proportion of small Daphnia in the very low density aquaria compared with the medium or high density aquaria.
_____ Bluegills would consume equal proportions of large Daphnia in all aquaria.
_____ In medium density aquaria, bluegills would select medium sized Daphnia over small or large Daphnia.
_____ The tendency to select large Daphnia over small or medium Daphnia will increase as the density of Daphnia in the aquaria increases.

Answer 1

__X__ Bluegills would consume a larger proportion of small Daphnia in the very low density aquaria compared with the medium or high density aquaria.
_____ Bluegills would consume equal proportions of large Daphnia in all aquaria.
_____ In medium density aquaria, bluegills would select medium sized Daphnia over small or large Daphnia.
__X__ The tendency to select large Daphnia over small or medium Daphnia will increase as the density of Daphnia in the aquaria increases.