Evaluación de la macrofauna de lechos de Eisenia foetida (lombriz roja californiana) sometida a la descomposición de excretas de caninos tratados con fluralaner

Abstract

The use of antiparasitics in pets has a severe environmental impact due to possible ecotoxicological effects, since 90% of the active molecule is eliminated through the feces, so we must take into account the complications that could be caused in the environment. For this reason, the objective of this research was to evaluate the macrofauna of Eisenia foetida (Californian red worm) beds subjected to the decomposition of canine excreta treated with Fluralaner. Three treatments were used for the experiment (rabbit feces, canine feces without Fluralaner, canine feces with Fluralaner) in 12 beds. A completely randomized design was applied, with 4 replications per experimental unit. The experimental work lasted 2 months, the presence of macrofauna was verified every 15 days; each treatment was constantly watered and removed. The results obtained from the present investigation were subjected to an ADEVA analysis of variance, regression and correlation analysis and for the separation of means of the treatments the Duncan test was applied. The treatment (TECF) using canine excreta treated with Fluralaner yielded 256.25 individuals/m2 and 3.06 kg of humus, and consequently no profit margin was obtained. On the contrary, the treatment where rabbit excreta (TEC) was used was the best with 1074.37 individuals/m2 where the highest humus production is evidenced with 16.6 kg and a profitability of 0.32 dollars for each dollar invested. It was concluded that the use of dog excreta in which Fluralaner was used directly affected the macrofauna, humus production and profitability, so it is recommended not to use dog excreta if they were treated with Fluralaner and are destined for composting.