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Brainwashed by a parasite

[es] :: Nauka :: Brainwashed by a parasite

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Ivan Dimkovic

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icon Brainwashed by a parasite12.08.2009. u 12:46 - pre 178 meseci
Priroda nekada stvarno izgleda kao horor film... OK, ose koje ubadaju bube na tacno precizno odredjeno mesto u nervnom sistemu i ubrizgavaju otrov koji im omogucava da njima upravljaju kao sa dzojstikom je jedna stvar...

Ali ovo je jos ludje - u pitanju je gljiva, cije spore izazivaju brainwash nesrecnog mrava koji ga tera da ode na tacno predvidjeno mesto (list biljke) i onda se svojim kljestima zakaci za isti... posle cega mu gljiva unisti nervni sistem i nastavlja da lepo raste iz njega:

Scary, a?

http://neurophilosophy.wordpre.../20/brainwashed-by-a-parasite/

Citat:

The carpenter ant in the picture on the right (genus Campanotus), and the bullet ant in the first film clip below (Paraponera clavata), have fallen victim to parasitic fungi of the genus Cordyceps, which manipulate the behaviour of their host in order to increase their own chances of reproducing.

The spores of the fungus attach themselves to the external surface of the ant, where they germinate. They then enter the ant’s body through the tracheae (the tubes through which insects breathe), via holes in the exoskeleton called spiracles. Fine fungal filaments called mycelia then start to grow inside the ant’s body cavity, absorbing the host’s soft tissues but avoiding its vital organs.

When the fungus is ready to sporulate, the mycelia grow into the ant’s brain. The fungus then produces chemicals which act on the host’s brain and alter its perception of pheromones. This causes the ant to climb a plant and, upon reaching the top, to clamp its mandibles around a leaf or leaf stem, thus securing it firmly to what will be its final resting place.

The fungus then devours the ant’s brain, killing the host. The fruiting bodies of the fungus sprout from the ant’s head, through gaps in the joints of the exoskeleton. Once mature, the fruiting bodies burst, releasing clusters of capsules into the air. These in turn explode on their descent, spreading airborne spores over the surrounding area. These spores then infect other ants, completing the life cycle of the fungus. Depending on the type of fungus and the number of infecting spores, death of an infected insect takes between 4-10 days.



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Mikky

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icon Re: Brainwashed by a parasite12.08.2009. u 13:58 - pre 178 meseci
Fascinantno. Samo nije mi jasno sta ce joj mrav, kao izvor hrane?
-I know UNIX, PASCAL, C, FORTRAN,
COBOL, and nineteen other high-tech
words.
 
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Shadowed
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icon Re: Brainwashed by a parasite12.08.2009. u 14:17 - pre 178 meseci
Kao izvor hrane i da je popne na vecu visinu tako da bolje rasprsi spore.
 
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brainbuger

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icon Re: Brainwashed by a parasite12.08.2009. u 14:28 - pre 178 meseci
Izmedju mrava i gljiva ima dosta takvih oblika medjusobne zavisnosti (poznato jos kao Ant-fungus mutualism) gde i jedna i druga vrsta imaju obostranu korist. U nekim slucajevima mravi gaje gljive kojima se hrane, bukvalno kao ljudi u svojoj basti. No, ovaj primer je ipak neobican, suvise je poguban za mrava. Mada, opet, koliko mi znamo o tome, i kakav je pravi uticaj spore na njegov mozak?

Sta ako je u pitanju opsta nirvana koja se postepeno pretvara u potpunu oduzetost gde on umire u najlsladjim iluzijama drzeci se za list :))

Btw, evo jednog BBC-jevog dokumentarca o tome, vredi odgledati :
http://www.metacafe.com/watch/331826/ant_fungus/
 
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Backy
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icon Re: Brainwashed by a parasite12.08.2009. u 14:47 - pre 178 meseci
Citat:
brainbuger: Mada, opet, koliko mi znamo o tome, i kakav je pravi uticaj spore na njegov mozak?

Sta ako je u pitanju opsta nirvana koja se postepeno pretvara u potpunu oduzetost gde on umire u najlsladjim iluzijama drzeci se za list :))


da, možda su u pitanju mravlje magic shrooms :D
aka Vitez Koja
::
日本光学工業株式会社 :: One photo out of focus is a mistake, ten
photo out of focus are an experimentation, one hundred photo out of focus are a
style.
 
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