At the end of the study, ponds and tanks were seined and drained to collect all fish. In
Experiment 1, all fish were counted and batch weighed. Total and standard lengths were
measured for 20 T. renuizlli and 20 0. shirunus per pond. All fry and fingerlings were
collected, counted and batch weighed. In Experiment 2, all fish were weighed and total
and standard lengths measured.