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The smell of danger: Rats instinctively avoid compound in carnivore urine - 0 views

www.sciencedaily.com/...110628163325.htm

smell carnivore urine compound rats danger ratas olor ciencia carnívoros

shared by pepa garcía on 04 Jul 11 - No Cached
  • Ferrero discovered that one of the 14 TAARs, TAAR4, detected the odor of several carnivores.
  • a kairomone, a chemical that works like a pheromone, except that it communicates between members of different species instead of members of the same species.
  • "One of the things that's really new here is that this is a generalized predator kairomone that's volatile," s
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  • It's been known so long that predator odors are great rodent deterrents, but we've discovered one molecule that's a key part of this ecological relationship,
pepa garcía

Crittervision: What a dog's nose knows - 22 August 2011 - New Scientist - 0 views

www.newscientist.com/...on-what-a-dogs-nose-knows.html

dog nose knows august scientist perros olfato

shared by pepa garcía on 22 Aug 11 - No Cached
  • "The smells have different layers, which probably give dogs a much bigger range of types of information."
  • But the dog's eyes are just a back-up.
  • The dog could imagine the future by picking up the scent of the dogs, humans or other objects coming towards them on the breeze.
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  • they inhale air from two distinct regions of space, allowing the dog to decipher the direction of a scent.
  • The sniff also funnels stale air out through the sides of the nostrils, an action which pulls new air into the nose.
  • Once inside the nose the air swirls around up to 300 million olfactory receptors, compared with our measly 6 million
  • the dog olfactory cortex, which processes scent information, takes up 12.5 per cent of their total brain mass, while ours accounts for less than 1 per cent.
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