Expertfråga

[Spawn]

Ni vet när de säger att hajar kan känna "doften" av blod på flera kilometers avstånd. Jag undrar bara hur fasen de går till? Om de har "luktsinne" eller något? fast hur kan blodets "lukt" gå genom flera kilometers avstånd på några få minuter?

[DanielF]

Actually, sharks cannot smell anything from a great distance. What they can do phenomenally well is sense extremely minute quantities of dissolved chemical 1,300 feet (400 metres) or more from their source. But, before it can be detected as a 'smell', a tiny sample of that chemical must come into direct contact with specialized chemically-sensitive tissue known as 'olfactory epithelium'.


Läs hela texten här:
http://www.elasmo-research.org/education/topics/s_nose.htm

[Spawn]

Actually, sharks cannot smell anything from a great distance. What they can do phenomenally well is sense extremely minute quantities of dissolved chemical 1,300 feet (400 metres) or more from their source. But, before it can be detected as a 'smell', a tiny sample of that chemical must come into direct contact with specialized chemically-sensitive tissue known as 'olfactory epithelium'.


Läs hela texten här:
http://www.elasmo-research.org/education/topics/s_nose.htm

hehe Okey thanks :)

[Rahf]

Hajar har alltså ett jävligt välutvecklat organ i form av olfactory epithelium.

På nära håll använder de dock Ampullae of Lorenzini för att snappa upp elektriska fält från både fisk och hav.

[soulsplinter]

där lärde man sig något nytt!!