Too many baby perch is the same as too many small BG. Over crowding, Food shortage and Poor growth.
Viable developing eggs will darken in color within a few days of hatching.
Bright white individual eggs means the egg was not fertilized and egg is in early stages of decomposition.
Don't count on the large spotfins to eat very many fry.
Research from South Dakota State Univ. Dr Willis indicated colder water temps after egg laying did not significantly reduce hatching.
Clear water, depends on how clear, means proportionally reduced zooplankton density and lack of fry food.
Your spawning results indicates you should be harvesting adult perch. A small pond really only needs one or two fully hatched egg ribbons to replace annual natural adult mortality.
Last edited by Bill Cody; 03/25/2107:43 PM.
aka Pond Doctor & Dr. Perca Read Pond Boss Magazine - America's Journal of Pond Management
