Bibliographic citations
Chipollini, V., (2023). Dieta de la Trucha Arcoíris en el área de estudio de tres proyectos mineros en Apurímac, Cuzco y Ancash [Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/5851
Chipollini, V., Dieta de la Trucha Arcoíris en el área de estudio de tres proyectos mineros en Apurímac, Cuzco y Ancash []. PE: Universidad Nacional Agraria La Molina; 2023. https://hdl.handle.net/20.500.12996/5851
@misc{renati/246249,
title = "Dieta de la Trucha Arcoíris en el área de estudio de tres proyectos mineros en Apurímac, Cuzco y Ancash",
author = "Chipollini Zapata, Vanessa Angélica",
publisher = "Universidad Nacional Agraria La Molina",
year = "2023"
}
The rainbow trout, Oncorhynchus mykiss, is considered one of the 100 invasive species of worldwide concern due to, among other aspects, predation on endemic fish. In Peru, it was introduced for commercial purposes in the 1920s and is already considered a naturalized species due to its wide distribution in the Andean region. Some specialists state that it is a predatory species that feeds on endemic fish and, therefore, has affected these populations in our country. On the other hand, the rainbow trout is an important aquaculture resource for domestic and foreign trade, and it is a protein source of protein for the population at the national level. In this context and aiming to identify the main dietary items of the rainbow trout, three hydrobiological baselines of environmental impact studies approved by the Ministry of Energy and Mines (MINEM) in the regions of Apurimac, Cuzco and Ancash were analyzed. The results of the stomach contents of 224 specimens were examined and the food importance and trophic breadth indexes were calculated to describe their feeding behavior. As part of the results, mainly aquatic insects of the orders Ephemeroptera, Diptera, Coleoptera, Trichoptera; Amphipoda crustaceans; and gastropods in smaller percentages were found. Fish remains and eggs were also found in the stomach contents of 5 specimens, which would prove that fish are not a major food item. Due to the presence of endemic fishes of the genera Astroblepus, Orestias, and Trichomycterus, with which it cohabits in the tested watersheds and because they share some food items in common, it is concluded that the trophic relationship between the rainbow trout and endemic fishes requires full attention for the food resource. An evaluation is recommended at all maturity stages of the rainbow trout to confirm these results. Finally, due to the pressure of the trout rainbows on benthic macroinvertebrates, it is also advisable to evaluate the possible impact on this biological community and the implications for nutrient cycling of water environments.
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