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becoming stunted
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ITHURTZ
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Joined: 30 Nov 2006
Location: Chicagoland

PostPosted: 2007.01.17(Wed)13:28    Post subject: becoming stunted Reply with quote

how does a fish choose to. How big can this fish get in a certain tank before it stunts ifself, how does it know when to unstunt?
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fiffy
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Joined: 26 Jun 2004
Location: Arizona

PostPosted: 2007.01.17(Wed)14:02    Post subject: Reply with quote

I doubt a fish choses to become stunted, and I'm not even sure it can become "unstunted". and considering that the stunting is very stressful for the fish I doubt any of them would ever chose to become stunted.
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number6
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Joined: 07 Feb 2003
Location: Ontario, Canada

PostPosted: 2007.01.17(Wed)14:17    Post subject: Reply with quote

fish do not become stunted intentionally...

it happens one of two ways usually...

1.) stress hormones... secreted by fish under stress such as touching, damage, predators, etc. the purpose is to assist the fish in reacting to the stress and learning to avoid it. Side effect is a growth inhibiting effect. The hormone shuts down some normal bodily functions for many reasons, one of which is because energy is being spent elsewhere and shouldn't be used for growth. Once stress is removed, normal physiological processes resume.
Internal organs are not slowed in growth as much as skeletal and structural tissue generation. This is why you may hear about organs outgrowing the fish, or bursting... it's a bit of a myth but comes from this bunching up of organs as they outgrow the cavity they are housed in.

2.) The other stunting is a phenotypical expression in males due to the presence of a dominant male. The males continue in female garb to avoid aggression but still occupy prime territory. Many of these "sneaker" males will sneak an opportunity to mate on the sly.


Hope tht helps
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Kit-Kat
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Joined: 12 Aug 2006

PostPosted: 2007.01.17(Wed)21:56    Post subject: Reply with quote

when you say touching, what do you mean, by a human hand?
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number6
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Joined: 07 Feb 2003
Location: Ontario, Canada

PostPosted: 2007.01.18(Thu)8:12    Post subject: Reply with quote

Kit-Kat wrote:
when you say touching, what do you mean, by a human hand?
all physical contact... nets are so so, other fish are bad, your hand is sandpaper... all show a spike in stress hormones in test fish.
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