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New insights on chameleon colour shifts
chameleon
A deeper layer of iridophores with larger crystals reflects a substantial amount of sunlight.

Vivid colour changes achieved through crystal rearrangement, study suggests

Scientists have shed new light on how chameleons are able to achieve their famous colour shifts.

It is now thought to be accomplished through the rearrangement of crystals inside specialised cells, rather that the dispersal of pigments.

Chameleons, particularly panther chameleons, are known for their ability to rapidly change between vivid colours in social situations - for example in contests between males or during courtship.

Previously, this was believed to be due to a gathering or dispersal of pigments in different cells. Quantum physicists and evolutionary biologists from the University of Geneva, however, now believe  this is achieved by rearranging crystals in specialised skin cells called iridophores.

According to their findings, which have been published in the journal Nature Communications, a deeper layer of iridophores with larger crystals reflects a substantial amount of sunlight, which may help the reptiles to stay cool.

Senior author, Professor Michel Milinkovitch, told BBC News: "They split the iridophores into two layers, one that is specialised for colour change... and one to reduce the amount of energy absorbed by the animal.

"That's an amazing toolkit that allows them to choose between being hidden or displaying very spectacular colours for communication - and on top of that they have this ability to control their temperature because of the deep iridophores."

For the full study, visit: http://www.nature.com/ncomms/2015/150302/ncomms7368/full/ncomms7368.html

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Webinar to explore history of KC breed registers

News Story 1
 A free webinar exploring the development of the Kennel Club's registration system and the evolution of closed breed registers has been announced.

Hosted by Dr Alison Skipper, veterinary and research advisor at the Kennel Club, the webinar will delve into the development of the registry and how the changing landscape of scientific knowledge has shaped breeding practices. It will also look at what this means for the future of pedigree dogs.

The session will culminate with a look at The Kennel Club's ongoing and future engagement in this area, with a chance for attendees to put forward their thoughts and questions for discussion.

This event takes place on Microsoft Teams on Tuesday, 10 June at 7pm. To learn more, visit events.teams.microsoft.com  

Click here for more...
News Shorts
UK's BSE risk status downgraded

The WOAH has downgraded the UK's international risk status for BSE to 'negligible'.

Defra says that the UK's improved risk status recognises the reputation for having the highest standards for biosecurity. It adds that it demonstrates decades of rigorous animal control.

Outbreaks of Bovine Spongiform Encephalopathy, also known as mad cow disease, have previously resulted in bans on Britain's beef exports.

The UK's new status could lead to expanded trade and better confidence in British beef.

Christine Middlemiss, the UK's chief veterinary officer, said: "WOAH's recognition of the UK as negligible risk for BSE is a significant milestone and is a testament to the UK's strong biosecurity measures and the hard work and vigilance of farmers and livestock keepers across the country who have all played their part in managing the spread of this disease.