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Re: a question about reproductive strategies, another about
>1) When discussing dinosaur reproductive strategies, the terms
>"r-strategy" and "K-strategy" are used. I understand the definition of the
>terms (I think) but want to know what the "r-" and the "K-" stand for, if
Both of these letters are a part of population dynamic graphs that ecologists
use to describe a particular species.
The "r" is the number of young produced per unit time. Species that are
"r-selected" (note the terminology) are those that have a huge number of
offspring in a breeding season. These tend to have minimal parental
involvement in rearing the young; not suprisingly, they also tend to have
a very high juvenile mortality rate. The individuals tend to be short lived.
Deer is (are?) a good example.
The "K" is a function of the lifespan of the species. Species that are
"K-selected" tend to have almost the exact opposite tendencies of r-selected
species. They tend to have a great deal of parental care and a very low
juvenile mortality rate. The individuals have a long life span. Elephants
are a good example.
Hope this helps,