6 Rethinking Avian Demography: Understanding Landscapes, Sources, Sinks, and Dispersal

2002 ◽  
pp. 77-96
Keyword(s):  
Avian Demography

Matrix Methods for Avian Demography

1993 ◽  
pp. 139-185 ◽  
Author(s):  
David B. McDonald ◽  
Hal Caswell
Keyword(s):  
Matrix Methods ◽  
Avian Demography

Avian demography: statistics and ornithology

Ostrich ◽  
1999 ◽  
Vol 70 (1) ◽  
pp. 61-70 ◽  
Author(s):  
L. G. Underhill
Keyword(s):  
Avian Demography

Application of a global age-coding system (“WRP”), based on molts and plumages, for use in demographic and other studies of birds

The Auk ◽  
2021 ◽  
Author(s):  
Peter Pyle ◽  
Marcel Gahbauer ◽  
Erik I Johnson ◽  
Thomas B Ryder ◽  
Jared D Wolfe
Keyword(s):  
Coding System ◽  
Molt Cycle ◽  
Tropical Regions ◽  
Coding Systems ◽  
Global Age ◽  
Evolutionary Context ◽  
Core Concepts ◽  
Avian Demography ◽  
Occurrence Patterns

Abstract Determination of a bird’s age or cohort is critical for studies on avian demography, occurrence patterns, behavior, and conservation management. Age designations have largely been developed in north-temperate regions and utilize calendar-based or seasonally based codes; however, in tropical regions and in the southern hemisphere, these coding systems have limited utility at best. To address these issues, we had previously devised the “WRP system,” based on the nomenclature of Humphrey and Parkes (H–P) and Howell et al., which defines molts in an evolutionary context applicable to birds globally. Here we refine and build upon core concepts and definitions of the WRP coding system, resolving key limitations that were identified during its first decade of use. The WRP system employs a three-letter alpha code in which each letter describes a different aspect of H–P terminology: the molt cycle (which informs a bird’s age) and molt and plumage status within the cycle (each of which can also inform age). Here we recommend the continued use of most of the original (“core”) WRP coding while augmenting the system with an optional adjunct-code entry for comprehensiveness, clarity, and flexibility, and we clarify a few additional codes to cover less common molting and plumage strategies. For most users, from 7 to 13 core and 1 adjunct WRP code will be sufficient to describe all plumages and provide molt status and ages for demographic studies or other purposes. The revised WRP system is flexible enough to be adapted to the specific goals of programs while also providing core codes that can facilitate the comparison of avian age, molt, and plumage status on a global basis. We anticipate that our revised and standardized version of the WRP system will be easily adopted and could eventually replace calendar-based and seasonally based coding.

scholarly journals SURVIVAL RATES OF A NEOTROPICAL PARROT: IMPLICATIONS FOR LATITUDINAL COMPARISONS OF AVIAN DEMOGRAPHY

Ecology ◽  
2000 ◽  
Vol 81 (5) ◽  
pp. 1351-1370 ◽  
Author(s):  
Brett K. Sandercock ◽  
Steven R. Beissinger ◽  
Scott H. Stoleson ◽  
Rebecca R. Melland ◽  
Colin R. Hughes
Keyword(s):  
Survival Rates ◽  
Avian Demography

Avian Demography, Community Ecology and Biogeography

Ecology ◽  
1994 ◽  
Vol 75 (4) ◽  
pp. 1194-1194
Author(s):  
Nicholas J. Gotelli
Keyword(s):  
Community Ecology ◽  
Avian Demography

Comparative Avian Demography

1983 ◽  
pp. 1-32 ◽  
Author(s):  
Robert E. Ricklefs
Keyword(s):  
Avian Demography
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