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Hermit crab behaviour affected by microplastics
"This study shows how the microplastic pollution crisis is threatening biodiversity more than is currently recognised" - Mánus Cunningham.

The microplastics impede the crabs' ability to attack and defend. 

New research from Queen's University Belfast has discovered microplastics affect hermit crabs' ability to fight during shell fight contests, which are vital for the species' survival.

The study expands upon previous research by Queen's University which demonstrated that hermit crabs were less likely to touch or enter high-quality shells when exposed to microplastics. 

Published in Royal Society Open Science, the study explores how hermit crabs' behaviour is effected when exposed to microplastics, and discovered that the microplastics impair both the attacking and defending behaviour of hermit crabs during contests, affecting their ability to secure the larger shell necessary for growth and survival. 

The research process involved keeping hermit crabs in two tanks, one containing polyethylene spheres, and one with plastic for five days. The researchers stimulated the environment to encourage a hermit crab contest through placing pairs of hermit crabs in an arena, and giving each crab the wrong sized-shell to encourage a fight.

Crabs exposed to the plastic displayed weaker attacking behaviour during fights than those not exposed to plastic, and it was found that the microplastics also reduced the crabs' defending ability to properly assess their attackers during contests. 

Mánus Cunningham, one of the paper's lead researchers, commented: “These findings are hugely significant as they illustrate how both the information-gathering and shell evaluations were impaired when exposed to microplastics.

“Although 10% of global plastic production ends up in the ocean, there is very limited research on how this can disrupt animal behaviour and cognition. 

“This study shows how the microplastic pollution crisis is threatening biodiversity more than is currently recognised.”

Dr Gareth Arnott, principal investigator of the project, added: “This study provides an insight into the potential for microplastics to alter important aspects of animal behaviour that are critical for survival and reproduction.

“We need to further investigate how microplastics affect their behaviour and the consequences, armed with this knowledge to advocate for change to protect our ecosystem.”

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Practices urged to audit neutering data

News Story 1
 RCVS Knowledge has called on vet practices to audit their post-operative neutering outcomes.

It follows the release of the 2024 NASAN benchmarking report, which collates data from neutering procedures performed on dogs, cats and rabbits.

The benchmarking report enables practices in the UK and Ireland to compare their post-operative outcomes to the national average. This includes the rate of patients lost to follow-up, which in 2024 increased to 23 per cent.

Anyone from the practice can submit the data using a free template. The deadline for next report is February 2026.

Visit the RCVS Knowledge website to complete an audit. 

Click here for more...
News Shorts
RCVS pays tribute to well-loved equine vet

The RCVS and the Riding Establishments Subcommittee has paid tribute to well-loved veterinary surgeon and riding establishment inspector, Rebecca Hamilton-Fletcher MRCVS.

Linda Belton MRCVS, RCVS President, said: "I, along with my colleagues on the RESC, RCVS Council, RCVS Standards Committee, as well as RCVS staff, was very saddened to hear of the sudden death of Rebecca, or Becca as we knew her, last week.

"She was a true advocate for equine welfare and in her many years on the RESC worked to continually improve the quality and consistency of riding establishment inspections, all in the interests of enhanced horse welfare and rider safety."