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Re: Sauropod Necks



On Wed, 12 Jul 2000, Andrea Kirk wrote:
> This brings up a question that I can't quite get a grasp on, but the idea,
> at least, is floating around in my head.
> 
> <snip>
> > > All well-known animals with long necks use them for one purpose - access
> to
> > > elevated food sources.
> >
> > Giraffes use their necks for fighting and courtship.
> <snip>
> > I would say feeding is the primary purpose.
> 
> One would probably say (I think..) that the giraffe *evolved* a long neck
> for feeding, and has since found it useful for other purposes, like an
> elephant hosing itself down with its trunk.  Are there any modern animals
> that have special adaptations with multiple uses, to the point that
> scientists can't tell which use the adaptation was first meant for?
> 
> And can finding multiple uses for these adaptations be an evolutionary
> advantage?

Sexual selection covers a multitude of sins. 

Possible in giraffes, I suppose, but I don't know about sauropods.