Water or Food? Accumulation of Arsenic through water and food by the Brown shrimp, Crangon crangon from The Upper Mersey Estuary

Under natural conditions, exposure to contaminants can take place via different possible routes, including water intake and food ingestion. However, the availability of contaminants to an aquatic organism depends not only on its concentration but also on its chemical nature, physical state, and whether the source of exposure is the surrounding water or the diet. The brown shrimp, Crangon crangon is an ecologically and commercially important species. We investigated its arsenic accumulation, dosing the water or the food to determine the most important route of exposure. Shrimp were collected from a naturally contaminated area in the Upper Mersey estuary and exposed to two different treatments, under lab conditions: 1ppm arsenic dosed water with clean food and 5ppm arsenic dosed food in clean water. Few shrimp were sacrificed randomly over time and the Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) was used to measure the concentration of arsenic accumulated by the shrimp within the period of dosage. The effect of size, moulting, sex and other trace metals on arsenic accumulation by the shrimp was investigated. Crangon crangon did not accumulate arsenic via food nor water. The impact of arsenic on the colour behaviour was also investigated.

Promotor(s) & Supervisor: Mondal Debapriya, Chiara Benvenuto

ISCED Categories

The highlighted icons, represent the fields of education (in compliance with ISCED Classification) engaged during this course/programme.

0511 - Biology", "0512 - Toxicology