[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
re: parental care in dinosaurs
Tom Holtz wrote:
>> In Montana, alleged eggs of Troodontids also were laid in a linear
>>row.>So does this tell us anything about brooding behavior in the
>>Tyrannosauridae >and the Troodontidae? Could these theropods be
engaged >>in "drop 'em and >forget 'em" egg-laying? Does this indicate
that T. >>rex chicks were deadly >12-inch terrors right after hatching
(requiring >>no matriarchal or patriarchal >care-taking)? And if
Oviraptor chicks >>required parental care-taking in a >nest, what was
unusual about the >>Tyrannisauridae and Troodontidae chicks >such that
they didn't need a >>nest?
>The null hypothesis, on phylogenetic basis, is that all dinosaurs used
>some degree of parental care, as both the in-group (birds) and the
>closest surviving outgroup (crocodillians) protect the nest and the
>young for some duration.
Megapode birds care for the nest to maintain proper incubation
temperature, however, once the young are hatched, there is no parental
care. Therefore, a blanket statement that there must have been some
degree of parental care in dinosaurs is not necessarily true.