Ana Catarina Luscher Albinati

Eugenol como anestésico para a tilápia-do-nilo

Abstract – The objective of this work was to evaluate eugenol as anesthetic for Nile tilapia. For the best concentration of the anaesthetic, six treatments (50, 75, 100, 150, 200, and 250 mg L -1 ) were evaluated, with ten fi shes per treatment, anesthetised individually and monitored during the induction and recovery. Toxicity was estimated in 210 fi sh submitted to seven eugenol concentrations (50, 75, 100, 150, 200, 250, and 300 mg L -1 ) for 600 s; and for safety margin, 120 fi sh were submitted to 75 mg L -1 for fi ve time intervals (600, 1,200, 1,800, and 2,400 s). The effective concentrations were 50 and 75 mg L -1 . Lethal concentration (LC) values for 600 s were: LC01 81.97 mg L -1 , LC50 184.26 mg L , and LC99 286.55 mg L -1 . Times of lethal concentration (TLC) were TLC01 566.97 s, TLC50 1,611.66 s, and TLC99 2,656.34 s. For fast deep anesthesia, 75 mg L -1 of eugenol is recommended, with a safety margin of 484,27 s; for long period anesthesia (600 s) 50 mg L -1 were recommended. The higher therapeutic concentration costs R

Biomarcadores histológicos: toxicidade crônica pelo Roundup em piauçu (Leporinus macrocephalus)

0.065 per liter. Eugenol was effective for euthanasia at 286.55 mg L

Utilização do eugenol como anestésico para o manejo de juvenis de Pintado (Pseudoplatystoma corruscans)

The use of gills, liver, and kidneys as histological biomarkers was evaluated in a chronic toxicity analysis with herbicide Roundup® in piaucu (Leporinus macrocephalus). The animals were exposed to 1/10 of LC50 (1.58mg/L), during a period of 14 and 28 days. Five animals were used for treatment (days 0, 14, and 28). Hepatic hemorrhage and necrosis and renal congestion were the alterations that presented differences between exposed and non-exposed animals. Among the organs used as histological biomarkers, the liver presented the best results, followed by the kidneys.