Removal of pinon seeds by birds and rodents in San Luis Potosí, México Article uri icon

abstract

  • Removal of pinon seeds by birds before the period of seed production was higher on a northeast-facing slope (as opposed to a level area and a southwest-facing slope), probably as a result of better perches. Arrival of migrant birds after the period of seed production eliminated differences in seed removal. Removal of pińon seeds by rodents was highest, on the southwest-facing slope due to higher densities of Peromyscus. On clear nights, rodents foraged preferentially near the base of the trunks. In captivity, one Peromyscus difficilis and one P. maniculatus preferred pinon seeds from Pinus cembroides over those of P. discolor, and rejected empty seeds.

publication date

  • 1996-01-01