Effect of Lethal Concentrations of Rubber Extract (Hevea brasiliensis) on the Survival on Fingerlings of Clarias gariepinus under Laboratory Condition.

George, Ubong, Asuquo, Francis, Idung, Joseph, Andem, Andem


The water soluble fraction (WSF) of Hevea brasiliensis was tested against Clarias garienpinus, at 0, 30, 40, 50, 60 and 70mg/l in glass aquaria stocked with ten animals for 96 hours under observation for changes. Moribund swimming, restlessness, respiratory difficulties, depigmentation and mortalities were observed in the WSF exposure groups, but not in the controls. LC50 values were estimated at 50.12mg/l. There was no significant difference in mortalities between the replicate group (P>0.05), leading to the conclusion that the WSF of Hevea brasiliensis had same toxic effects on both batches of the test organism.

Full Text: PDF
Download the IISTE publication guideline!

To list your conference here. Please contact the administrator of this platform.

Paper submission email: JNSR@iiste.org

ISSN (Paper)2224-3186 ISSN (Online)2225-0921

Please add our address "contact@iiste.org" into your email contact list.

This journal follows ISO 9001 management standard and licensed under a Creative Commons Attribution 3.0 License.

Copyright © www.iiste.org