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Unread postPosted: Sat Mar 15, 2008 1:04 pm 
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Difficult to say without a pic. Deformities are normally a result of injury.

Being part of a croc family is a risky buisness :wink:

Genetically it does not seem to pose a problem at this stage although our croc poppulations are living in isolated pockets due to our doing.. :?


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Unread postPosted: Sat Mar 15, 2008 1:10 pm 
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Hmmm... Yes of course.. I wish I could find the picture.

I'm still not sure it was a deformity/injury though, as it seemed to be a very well "formed" nob on his head. One way I can explain its appearance... You know on some Colt bakkies? They have that "breathing hole" on the bonnet for the inter-cooler what-you-call-it.. Anyways... It's shape was a lot like that.


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Unread postPosted: Sat Mar 15, 2008 6:27 pm 
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gwendolen wrote:
Crocs eat very little. They don't really need much food because they get their energy from the sun.
Hi Gwendolen and others.A somewhat misleading statement. Crocodiles are like most reptiles poikilothermic. In other words they rely on external factors, like the sun, to heat their bodies to the desired temperature. Once they reach their desired temperature they thermoregulate, moving into and out of water or into shade to maintain the desired temperature. That is where it stops. They do not tap energy from the sun that will enable them to survive with the minimum intake of food. They can and do consume huge meals and in summertime eat regularly. They, like all reptiles eat less frequent in the colder months of our winters and may in this time go without food for lengthy periods. If they did not have ample food intake during the summer they may die during winter, because they do not have the reserves to see them through winter. This may explain why one will sometimes see photo's of impala etc. in close proximity of crocodiles. It may also explain why they have not eaten on the hippopotamus. In cold weather the cannot digest food. I recall seeing a vast number of crocodiles feeding on a hippopotamus years ago at night at Impala Ranch, close to KNP. This was in December. Mid summer in South Africa. Regards, Agama


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Unread postPosted: Mon Mar 17, 2008 12:04 pm 
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Pilane wrote:
Deformities are normally a result of injury.
Being part of a croc family is a risky buisness :wink:

Once I saw this one.
Image

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Unread postPosted: Mon Mar 17, 2008 12:16 pm 
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Aha! I found the picture!!

He was in the water by the Lower Sabie bridge.

Image


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Unread postPosted: Mon Mar 17, 2008 2:47 pm 
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Thats a perfectly normal crocodile. They develop these "knobs" and it gets more pronounced with age. The black "hole" is just a shadow. (See the shadows of the scales on his neck.)

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Unread postPosted: Mon Mar 17, 2008 3:13 pm 
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Not Croc-specific, but interesting (I think):

Alligators can stealthily maneuver through the water leaving nary a ripple, despite having neither fins nor flippers like other adept swimmers. Instead, they use special muscles to shift the position of their lungs.

[scientists] said American alligators use their diaphragm, pelvic, abdominal and rib muscles to change their center of buoyancy, forcing the lungs toward the tail when they dive, toward the head when they surface, and sideways to roll.

The full article at Reuters.

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Unread postPosted: Tue Mar 18, 2008 8:02 pm 
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Quote:
diaphragm
:shock:

That is someting that all of the croc family do not have!!! :roll:


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Unread postPosted: Tue Mar 18, 2008 10:03 pm 
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"... :rtfm: crocodiles have both a septate lung and a diaphragm—an organ not found in snakes, lizards, or birds. But the crocodile diaphragm is also somewhat different from that in mammals. It is not muscular but is attached to the liver and movement of this liver/diaphragm acts like a piston to inflate the lungs, with muscles attaching to the pelvis. (The mammalian [including human] diaphragm pulls the liver in the same way a crocodilian one does, creating a visceral piston, but the way this is accomplished differs in crocodiles and mammals..." I Googled crocodile diaphragm and amongst others this came up. The scaly skin hides a lot of secrets!


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Unread postPosted: Wed Mar 19, 2008 6:13 pm 
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I know agama but it does fuction differently an also looks very different although called a 'diaphragm' by some. It is very different as you pointed out yourself and it should't be called a diaphragm as it is not a muscular partition.... The liver actually pull on this 'diaphragm' and not the other way around...
To breathe in, a croc has to move its liver and other organs backwards
:wink:


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 Post subject:
Unread postPosted: Thu Mar 20, 2008 3:47 pm 
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here's an unusual way of posing... Biyamithi Weir. :D

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 Post subject: Crocodile
Unread postPosted: Thu Mar 20, 2008 4:21 pm 
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Laine, You captured the business end of this crocodile beautifully! Well spotted!:thumbs_up: Agama


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 Post subject: Re: Nile crocodile
Unread postPosted: Tue Oct 21, 2008 4:09 pm 
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Image

Lion Buffalo and croc !!!!!! what a sight

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 Post subject: Re: Nile crocodile
Unread postPosted: Mon Mar 16, 2009 1:49 pm 
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This is one of those photos that float around the internet from time to time. Does anybody have any idea where it came from?

Image

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 Post subject: Re: Nile crocodile
Unread postPosted: Wed Mar 18, 2009 5:52 pm 
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:big_eyes: Wow!

Sorry, no idea...

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