Digestive gland alterations in Bivalves (Tivela ponderosa) exposed to Mareb crude oil, dispersed oil with dispersant, dispersant (Histological study)
University of Aden Journal of Natural and Applied Sciences,
Vol. 19 No. 2 (2015),
31-08-2015
Page 341-351
DOI:
https://doi.org/10.47372/uajnas.2015.n2.a08
Abstract
This study includes three laboratory experiments for studying toxicity effects of three test chemicals (Mareb crude oil, dispersed oil with dispersant and dispersant) on the tissue of digestive gland of bivalve (Tivela ponderosa).Acute toxicity test was done by exposed bivalve Tivela ponderosa to the concentrations 5, 10, and 15 ml/l of test chemical (Mareb crude oil, dispersed oil with dispersant and dispersant) which was added to see water (exposure time 96 hours). At chronic toxicity study, bivalve Tivela ponderosa was exposed to 0.5, 1.0, 1.5 ml/l of the same chemical toxicant which was added to see water (exposure time 3 weeks).Biomarkers was observed in the bivalve Tivela ponderosa when exposed to different concentrations of chemical toxicants. The study showed that only dispersant have a less effect than crude oil or a mixture of dispersed oil with dispersant. The histological changes in digestive gland tissues was proportional to the concentrations in both acute and chronic toxicity test. The digestive gland of bivalve in low concentration of both acute and chronic toxicity test showed expansion of lumen, and the epithelial cells became thinner in the tissue exposed to low concentration of the three test chemicals; and at medium concentrations the digestive gland showed increase in vacuoles and secretions, while at high concentrations more changes appeared, such as general degeneration, and the digestive gland became more vacuolated.
Keywords:
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Acute toxicity, Chronic toxicity, Digestive gland, Mareb Crude oil, Dispersed Oil with Dispersant, Dispersant, Bivalves, Tivela ponderosa, Histological study
How to Cite
Al-Shaibani, E., Dobian, A. S., Hassan, N. A., & Al-Shwafi, N. A. (2015). Digestive gland alterations in Bivalves (Tivela ponderosa) exposed to Mareb crude oil, dispersed oil with dispersant, dispersant (Histological study). University of Aden Journal of Natural and Applied Sciences, 19(2), 341–351. https://doi.org/10.47372/uajnas.2015.n2.a08
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