Evaluación de dos tipos de balanceados comerciales para la etapa de alevinaje de la trucha arco iris (Oncorhynchus mykiss) en la parroquia Río Negro del cantón Baños, provincia de Tungurahua.

Abstract

The aim of the research was to evaluate two commercial types of feeding for juvenile rainbow trout (Oncorhynchus mykiss) in Rio Negro, Baños town. To evaluate the effect of the feeding formula, 4000 seven-day juvenile trout were selected. For each treatment 2000 trout in each tank were the feeding took place by spreading the food supplement randomly 4 times a day, during a time period of 105 days. Data related to weight and length was recorded every 7 days until the final weight measurement, in order to compare both types of feeding the following data was documented: initial weight (g), final weight (g), total weight gain (g), initial size (cm), final size (cm), total amount of food consumption (g), mortality rate (%); each of the feeding formulas have their own characteristics, therefore the changes were registered measuring the juvenile trout. The technology used for the elaboration of the Acuario feeding, and its formula allows to obtain feedings with high nutritional value to achieve better growing rates, development and better economic benefits provided in the pigmentation required by the market. The results were tasted by using the t-students al (P<0, 01) y (P>0, 05) test. The results were obtained by implementing the Acuario feeding against the other commercial one, this due to significant differences in the final weight with 32,21 g, final size 10,71 cm, a mortality rate of 4,5% and a cost/benefit rate of 1, 29 USD. Finally, it has been concluded the Acuario feeding shows better results for both productive and reproductive rates, and this study is recommended as a foundation for future research in the area.