Estimation of waste generated by the production of rainbow trout in Lake Tota, Colombia

Abstract

In this study, the total waste from the production of rainbow trout, Oncorhynchus mykiss ( Wa l b a u m ) (Salmoniformes: Salmonidae) in Lake Tota freshwater ecosystem, located in the Department of Boyaca, Colombia, and its potential impact on the lake was estimated. This economic activity has been carried out intensively since 2005 using submerged cages in the lake. With data obtained from the National Authority for Aquaculture and Fisheries (Aunap), the Autonomous Regional Corporation of Boyaca (Corpoboyaca), and the Chamber of Commerce of Sogamoso, fish farmers, their geographical location on the lake, production by these farms were identified, and with this information the amount of waste produced, including the amounts of nitrogen and phosphorus generated in this process was calculated. The results indicate that the lake is polluted due to intensive trout production. It is recommended to improve or modify trout production methods that will minimize water pollution.