<< They are naturally filter feeders and tend to collect below the out
fall of sewage treatment plants or in the case of the ones I caught below
spillway of a very nutrient polluted lake. They like water with a high
bacterial count so they can filter the bacteria out of the water but they
also like a high oxygen content. Two things that don't go together often.
at the bottom of the lake spillway the tumbling water becomes concentrated
with oxygen and phytoplankton which results in ideal conditions for the
That's odd; I knew that other shad were planktivores but I had always thought
that gizzard shad ate filamentous algae instead of diatoms. The reason I
thought this was because my Audubon guide states that alewives feed on
plankton, whereas with the gizzard shad it says that they're herbivorous.
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