A stocking ratio of 1 male to 3 females is used. Advantages of the tank system 1. Fry can be produced where space and water are limited. Fry are easy to collect from tanks. Disadvantages of the tank system 1.
Tanks are expensive to build or buy compared with an equivalent area of earthen ponds.
Disease, parasites, and poor water quality are more common problems in tanks than in earthen ponds. Glossary of terms brood fish - sexually mature fish selected for reproduction. Funding for this series was provided by the United States Agency for International Development.