Skip to main content

Pesticides ingested with microplastics by fish

We are more aware than ever before that microplastics (plastic particles under 5 mm) are an abundant type of debris found in salt and freshwater environments.  They can be readily ingested along with food and enter the 'food' chain.  

It is not yet clear what harm if any the ingestion of microplastics has in the food chain, although some studies have found depressed growth and lethargy.

In a Limnology & Oceanography Letters study, researchers demonstrated the transfer of microplastics through the food chain between microscopic prey and larval fish that live in coastal ecosystems. They also found that microplastic ingestion interferes with healthy growth in fish larvae.

The investigators also looked at the effects of a common pollutant (the pesticide DDT) that attaches to microparticles in coastal waters. Organisms were not able to detect or discriminate against ingesting microparticles with high levels of DDT.

"Even short exposure to high levels of microplastics can impair growth of an important prey fish.”

“Our findings indicate that trophic transfer may be an important route for microplastic exposure in estuarine food webs and that even short exposure to high levels of microplastics can impair growth of an important prey fish,” said lead author Samantha Athey, of the University of Toronto. 

“Because estuaries are incredibly productive habitats that are home to many of our commercial seafood species in the United States, it is important to understand the sources, fate, and effects of microplastics and associated pollutants in these systems.”

Comments

Popular posts from this blog

Prioritising people in nursing care.

There has been in recent years concern that care in the NHS has not been sufficiently 'patient centred', or responsive to the needs of the patient on a case basis. It has been felt in care that it as been the patient who has had to adapt to the regime of care, rather than the other way around. Putting patients at the centre of care means being responsive to their needs and supporting them through the process of health care delivery.  Patients should not become identikit sausages in a production line. The nurses body, the Nursing and Midwifery Council has responded to this challenge with a revised code of practice reflection get changes in health and social care since the previous code was published in 2008. The Code describes the professional standards of practice and behaviour for nurses and midwives. Four themes describe what nurses and midwives are expected to do: prioritise people practise effectively preserve safety, and promote professionalism and trust. The

Ian Duncan-Smith says he wants to make those on benefits 'better people'!

By any account, the government's austerity strategy is utilitarian. It justifies its approach by the presumed potential ends. It's objective is to cut the deficit, but it has also adopted another objective which is specifically targeted. It seeks to drive people off benefits and 'back to work'.  The two together are toxic to the poorest in society. Those least able to cope are the most affected by the cuts in benefits and the loss of services. It is the coupling of these two strategic aims that make their policies ethically questionable. For, by combining the two, slashing the value of benefits to make budget savings while also changing the benefits system, the highest burden falls on a specific group, those dependent on benefits. For the greater good of the majority, a minority group, those on benefits, are being sacrificed; sacrificed on the altar of austerity. And they are being sacrificed in part so that others may be spared. Utilitarian ethics considers the ba

When Finance Drives Destruction

Tackling climate change means stopping the funding of rainforest destruction, says a significant study commissioned by the World Wildlife Fund.  The UK's financial services have provided directly over £8.7 billion to 167 different traders, processors, and buyers of forest-risk commodities (cocoa, rubber, timber, soy, beef, palm oil, pulp & paper) from 2013 to 2021.   With direct and indirect investment,  the figure rises to a staggering £200 bn.  Whilst not all that investment is in destructive projects,  the study concludes there is little transparency on the risk.  Finance is the oil in the economic machine.  But it also drives decisions. We all know the importance of money. We borrow to invest. So much depends on it, such as company pensions.  Do we really know what our pension pots are doing? We invest for the future. But what kind of future? Is all investment good?  Much investment is bad. Investment drives the nature of our economy. It drives our decisions as individuals,