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Re: Nocturnal dinosaurs in Science magazine



Looks like it is good for carnivorous vertebrates to be active when
herbivores which are their prey are not, and have better sense
equipment in these times of the day represent an advantage. This way,
carnivores may get herbivores while they are not active, their senses
are relatively less acute to fight or flee (there is a Spanish
documentary on a gente able to capture a rather large crow in the
night even when the latter escaped a first attempt when it was asleep,
and was later captured awake, but likely seeing very little). In
addtion, following trails with smell instead of sight may be easier
with non-moving prey items. This way, predators may not need to run
faster or fight better than prey in order to actually prey on it.

2011/4/14 Jura <pristichampsus@yahoo.com>:
> If the results are still the same as from their talk at SVP, you can't. 
> Scleral morphology mostly let one determine if an animal was either diurnal, 
> or nocturnal. Anything in between could be in between.
>
> Jason
>
>> Is crepuscular not a 'major' diel activity type? Although I
>> wonder how you'd tell crepuscular from
>> nocturnal or cathemeral based on scleral morphology alone.
>>
>> --
>> _____________________________________________________________
>>
>> Dann Pigdon
>> Spatial Data Analyst
>>      Australian Dinosaurs
>> Melbourne, Australia
>>      http://home.alphalink.com.au/~dannj
>> _____________________________________________________________
>>
>>
>