Title

A comparative study of the acute toxicity of 2,4-dichlorophenoxyacetic acid (hedonal), Metamidophos (tamaron) and Monocrotophos (nuvacron) to Tilapia nilotica

Date of Publication

1997

Document Type

Bachelor's Thesis

Degree Name

Bachelor of Science in Biology

College

College of Science

Department/Unit

Biology

Abstract/Summary

Acute toxicity tests were conducted to determine the percent mortality of T. nilotica exposed to different concentrations of 2,4-dichlorophenoxyacetic acid with the brand name of Hedonal (4-10 mg/l), metamidophos with the brand name of Tamaron (2-8 mg/l) and monocrotophos with the brand name of Nuvacron (2-8 mg/l). The 96-hr LC50 of the three pesticides was estimated using the Trimmed Spearman-Karber. A 28.9% mortality was observed in the 4 mg/l, 47.8% for 6 mg/l, 60% for 8 mg/l, and 93.3% in 10 mg/l in the pesticide Hedonal. For Tamaron, 17.8% mortality was observed for 2 mg/1, 38.9% for 4 mg/l, 53.3% for 6 mg/l, and 85.4% for 8 mg/l. For Nuvacron, the average percent mortality obtained were 21.3% for 2 mg/l, 35.7% for 4 mg/l, 51% for 6 mg/l, and 76.7% for 8 mg/l. An average percent mortality of 5.67% was observed in the control. The 96-hr LC50 was 6.218 mg/l for Hedonal, 4.975 mg/l for Nuvacron, and 4.797 mg/l for Tamaron. Tamaron was found to be more toxic to T. nilotica than Nuvacron and Hedonal. In general, as the concentration of the pesticide increased, the mortality of T. nilotica also increased.

Abstract Format

html

Language

English

Format

Print

Accession Number

TU07609

Shelf Location

Archives, The Learning Commons, 12F, Henry Sy Sr. Hall

Physical Description

41 leaves ; Computer print-out.

Keywords

Acute toxicity testing; Fishes--Mortality; Tilapia; Hedonal; Pesticides--Toxicology

This document is currently not available here.

Share

COinS