Premium
Acute toxicity of Trichlorfon (Dipterex) to fry of Cichlasoma urophthalmus Günther
Author(s) -
FLORESNAVA A.,
VIZCARRAQUIROZ J. J.
Publication year - 1988
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.1988.tb00583.x
Subject(s) - biology , organophosphate , toxicology , fish <actinopterygii> , pesticide , toxicity , acute toxicity , fishery , zoology , fish mortality , veterinary medicine , ecology , medicine
. Fry of Cichlasoma urophthalmus Günther were exposed to various concentrations of the organophosphate pesticide Trichlorfon, ranging from 1·25 to 80 mg/l in laboratory conditions. Mortality reached 100% in the highest concentrations (60 and 80 mg/l) in the first 24h. The intermediate concentration (40 mg/l) resulted in 50% mortality after 24h, and no mortality was observed in lower levels of the pesticide. LC50 at 24, 48 and 72h were 26·5, 23·7 and 17·2 mg/l respectively. Some of the surviving fish were transferred to clean fresh water for a post‐treatment growth trial. All the fish grew well with no apparent adverse effects as judged by their growth indices after 8 weeks.