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Microplastics worse for crabs and other marine life than previously thought, study shows
Date:7/18/2014

The tiny plastic particles polluting our seas are not only orally ingested by marine creatures, but also enter their systems through their gills, according to a new study led by the University of Exeter.

Scientists also discovered that when microplastics are drawn in through this method they take over six times longer to leave the body compared with standard digestion.

Lead author Dr Andrew Watts of the University of Exeter said: "Many studies on microplastics only consider ingestion as a route of uptake into animals. The results we have just published stress other routes such as ventilation. We have shown this for crabs, but the same could apply for other crustaceans, molluscs and fish simply any animal which draws water into a gill-like structure to carry out gas exchange.

"This is highly important from an ecological point of view, as if these plastics are retained longer within the animal there is more chance of them being passed up the food chain."

The researchers used fluorescently labelled polystyrene microspheres to show how ingested microplastics were retained within the body tissues of the common shore crab, Carcinus maenas. Multiphoton imaging suggested that most microspheres were retained in the foregut after sticking to hair-like 'setae' structures within the crabs.

Plastic is part of our everyday lives and has grown in use substantially over the past seven decades from 1.7 million tonnes in 1950 to an estimated 288 million tonnes in 2013. Around 40 per cent of this is believed to come from packaging material, most of which is single use and therefore disposed of.

It has been suggested that 10 per cent of plastic which is thrown away ends up in the marine environment. At 2013 production levels this equates to 11 million tonnes of packaging ending up in the marine environment every year. This plastic is then degraded by wave action, heat or UV damage and is created into microplastic (parti
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Contact: Eleanor Gaskarth
e.f.gaskarth@exeter.ac.uk
44-078-273-09332
University of Exeter
Source:Eurekalert  

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Microplastics worse for crabs and other marine life than previously thought, study shows
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