International Journal of Fisheries and Aquatic Studies
2016, Vol. 4, Issue 4, Part B
Preliminary investigations on effects of polycyclic aromatic hydrocarbons on embryos of widow tetra, Gymnocorymbus ternetzi BoulengerAuthor(s):
Justin David Clifton and TJ PandianAbstract:
Polycyclic aromatic hydrocarbons (PAHs) present in crude oil effluents, when released into aquatic ecosystem pose a major threat to fishes and humans. We investigated the harmful effects of PAHs on early embryonic and larval development of Gymnocorymbus ternetzi
. Embryos when exposed to samples containing Dibenzothiophene (3 rings), Phenanthrenes (3 rings) and Pyrenes (4 rings) at varying concentrations (15–90 µg/L) exhibited defective embryonic and larval development. As PAHs targets aryl hydrocarbon receptor (AhR) pathway, cardiac deformities were persistent in embryos exposed to PAHs for >48 hrs; concentration specific defects included arrested embryonic development (36 ± 2.6%), cytoplasmic blubbing (24%), pericardial edema and cardiac looping (43 ± 4.2%) and tail bents and body curvature (19%). However, embryonic defects were reversible (>47%) when transferred to clean water immediately after <24hrs of exposure. Suitability of tetras for eco-toxicology studies to investigate effects of aquatic pollutants on embryonic development, advantages and disadvantages are discussed.Pages: 120-124 | 756 Views 8 DownloadsDownload Full Article:
How to cite this article:
Justin David Clifton and TJ Pandian. Preliminary investigations on effects of polycyclic aromatic hydrocarbons on embryos of widow tetra, Gymnocorymbus ternetzi Boulenger. International Journal of Fisheries and Aquatic Studies. 2016; 4(4): 120-124.