Nom du corpus

Corpus Systématique Animale

Titre du document

Toxicity evaluation of ammonium sulphate and urea to three developmental stages of freshwater snails

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Mollusques_v2b_00331
Auteur(s)
  • P. B. Tchounwou 1
  • A. J. Englande Jr. 1
  • E. A. Malek 2
Affiliation(s)
  • 1) Department of Environmental Health Sciences, Tulane University Medical Center, 1430 Tulane Avenue, 70112, New Orleans, Louisiana, USA
  • 2) Department of Tropical Medicine and Parasitology, School of Public Health and Tropical Medicine, Tulane University Medical Center, 1430 Tulane Avenue, 70112, New Orleans, Louisiana, USA
Résumé

Studies were performed to evaluate the toxic effects of ammonium sulphate and urea (chemical fertilizers currently applied in ricelands of Cameroon) against eggs, juveniles, and adults of two species of freshwater snails (Helisoma trivolvis andBiomphalaria havanensis). Results obtained from ammonium sulphate tests indicated 24-h LC50 values of 558 mg/L and 669 mg/L for eggs; 393 mg/L and 526 mg/L for juveniles, and 701 mg/L and 657 mg/L for adults ofH. trivolvis andB. havanensis, respectively. Similar analysis with urea revealed LC50 values of 14,241 mg/L and 13,532 mg/L for eggs; 18,255 mg/L and 24,504 mg/L for juveniles and 30,060 mg/L and 26,024 mg/L for adults ofH. trivolvis andB. havanensis, respectively. Following 48 h exposure, the concentrations of ammonium sulphate killing 100% of snails were 1,250 mg/L and 1,000 mg/L for the adults ofH. trivolvis and ofB. havanensis, respectively. Those of urea were computed to be 25,000 mg/L forH. trivolvis and 35,000 mg/L forB. havanensis. In rice culture in Cameroon, these fertilizers are applied at doses of 100 kg/ha (ammonium sulphate) and of 150 kg/ha (urea); hence, the above found concentrations lethal to snails appeared to be 10 to 13 times (ammonium sulphate) and to be 165 to 235 times (urea) higher assuming an average water depth of 10 cm in these ricefields. Therefore, the use of ammonium sulphate and urea as chemical fertilizers in ricelands of the Republic of Cameroon might adversely affect the survival of freshwater snails only in the case of spills or of stressful environmental conditions. Under normal laboratory conditions, both chemicals show a low molluscicidal activity with urea being about 25 to 35 times less potent than ammonium sulphate.

Catégories Science-Metrix
  • 1 - health sciences
  • 2 - biomedical research
  • 3 - toxicology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - vecteurs d'importance medicale, nuisances, depredateurs des denrees et materiaux: surveillance des populations et lutte
Catégories Scopus
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Health, Toxicology and Mutagenesis
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Pollution
  • 1 - Life Sciences ; 2 - Pharmacology, Toxicology and Pharmaceutics ; 3 - Toxicology
  • 1 - Health Sciences ; 2 - Medicine ; 3 - General Medicine
Catégories WoS
  • 1 - science ; 2 - toxicology
  • 1 - science ; 2 - environmental sciences
Identifiant ISTEX
7BA7796A689A6B092F3C1D60E989C45FA4B8D9AF
Revue

Archives of Environmental Contamination and Toxicology

Année de publication
1991
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
6.921
Sous-corpus
  • Mollusques
Type de publication
Journal
ark:/67375/1BB-10DKW3F2-3
Powered by Lodex 9.3.8