Apparent Survival of Adult Magnificent Frigatebirds in the Breeding Colony of Isla Isabel, Mexico

  • González M
  • Cueva H
  • 28

    Readers

    Mendeley users who have this article in their library.
  • 4

    Citations

    Citations of this article.

Abstract

Annual apparent survival rates of the Magnificent Frigatebird ( Fregata magnificens ) were estimated from 1998 to 2003 using a capture-resight model with 870 marked adult birds on Isla Isabel, México (21°51’N, 105°54’W). The most parsimonious model was a time since marking model (or two age class model) with constant m resighting rate for males and females ( p m and p f ), constant apparent survival rate for males in both age classes ( φ 1 and φ 2+ m ), and time-dependent apparent survival rate for females ( φ 1 f and φ 2+ f ) in both age classes. We found higher resighting rates in males than in females, a tendency of higher apparent survival in females than in males in 1999, a clear higher apparent survival rates in females than in males in 2000, nearest the same apparent survival rates of the two age classes of males throughout, and differences in apparent survival between age classes of females showing considerable annual variation within age classes. The results suggest permanent emigration of females from the breeding colony, whereas males showed site fidelity.

Author-supplied keywords

  • apparent survival rate
  • demography
  • emigration
  • magnificent frigatebird
  • mark-resighting meth-

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • Monica González

  • Horacio De La Cueva

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free