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[23 Dec 12: 13:20]
Inbox zero! I don't even remember the last time I could say that!

[06 Aug 12: 14:21]
Phew! Done with nine 20min oral exams, three more to go. To be continued tomorrow...

[14 Oct 11: 11:45]
Just received an email from a computer science student - with an AOL email address?

[03 Jul 11: 22:26]
Google citation alerts suck: I just found out by accident I rolled over h-index of 13 and 500 citations

[21 May 11: 18:14]
6.15pm: Does god have Alzheimer? No #rapture in Europe...

[01 May 11: 11:31]
w00t! Just been invited to present at OKCon 2011! #OKCon2011


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Research papers by Björn Brembs
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Science Blog Directory
Random Video
Kenneth Catania compared the sensory systems of the Star Nosed Mole and the Water Shrew.
The nose of the Star Nosed Mole is covered with specialized sensory organs called Eimer's organs. In order to smell, the mole exhales air (it hunts in water) bubbles and then inhales them again (sniffing). Water Shrews also forage under water and also blow air bubbles in and out to sniff for their prey. Both species do this about 10 times per second. Importantly, terrestrial shrews trained to get food from water do not do this underwater sniffing, showing that this behavior is a functional specialization of the semi aquatic animals.
Water shrew are very quick under water and can catch fish and crayfish at night. The shrews don't see well in general, so vision does not guide them in finding its prey. Instead, the shrew senses water currents with their vibrissae: if a pulse of current is experimentally induced, the shrew will attack it. Their mechanosensory system is so accurate, that they can even distinguish the shape of the prey object. Undesirable prey shapes can be made to elicit an attack by moving them realistically.
So the mole uses its Eimer's organs and the shrew its vibrissae to accomplish prey localization and capture. Both species perform underwater sniffing. These differences and commonalities are reflected in the overall brain organization (work in progress).

Posted on Friday 27 July 2007 - 21:27:23 comment: 0
meeting   neuroethology   evolution of behavior   Katania   

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