Author: Mark Thomas Stanback
Publisher:
ISBN:
Category :
Languages : en
Pages : 386
Book Description
Causes and Consequences of Nestling Size Variation in the Cooperatively Breeding Acorn Woodpecker (Melanerpes Formicivorus)
Author: Mark Thomas Stanback
Publisher:
ISBN:
Category :
Languages : en
Pages : 386
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 386
Book Description
Competition and Cooperation in the Communally Breeding Acorn Woodpecker (melanerpes Formicivorus)
Author: Ronald Lane Mumme
Publisher:
ISBN:
Category :
Languages : en
Pages : 392
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 392
Book Description
Demographic and Fitness Consequences of Delayed Dispersal in the Cooperatively Breeding Acorn Woodpecker
Author: Justyn T. Stahl
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
ABSTRACT: Cooperative breeding in birds occurs when more than two individuals provide care for a single nest. In many species, the additional adults present are offspring from a previous year who have delayed dispersal, and provision young who are non-descendant kin. Delaying dispersal and age of first breeding can influence the demography and fitness of individuals, but the fitness and demographic consequences of helping behavior are poorly understood. Using long-term data (1972-2004), I examined the demographic and fitness consequences of helping behavior in acorn woodpeckers Melanerpes formicivorus. Using a multi-state capture-mark-recapture framework, I found that the apparent survival of breeders was higher than helpers, and the survival of males was higher than females. Juveniles were much more likely to become helpers rather than breeders following fledging, and helpers were more likely to remain helpers rather than becoming a breeder. Both survival and transition rates varied annually and were positively influenced by the acorn crop. For fitness estimation, I focused only on reproductive females who were banded as juveniles. Although helpers began reproduction significantly later and lived significantly longer than breeders, there was no significant difference in lifetime reproductive success or individual fitness between the two groups. However, birds that successfully bred at age 1 without helping had a significantly higher fitness than those who helped and successfully bred at age 2 or older. My results suggest that delayed dispersal and reproduction in the acorn woodpecker lead to a loss of fitness when conditions are favorable for successful reproduction. However, if constraints in the environment prevent an individual from breeding at age 1, helping is a viable option until reproduction is possible.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
ABSTRACT: Cooperative breeding in birds occurs when more than two individuals provide care for a single nest. In many species, the additional adults present are offspring from a previous year who have delayed dispersal, and provision young who are non-descendant kin. Delaying dispersal and age of first breeding can influence the demography and fitness of individuals, but the fitness and demographic consequences of helping behavior are poorly understood. Using long-term data (1972-2004), I examined the demographic and fitness consequences of helping behavior in acorn woodpeckers Melanerpes formicivorus. Using a multi-state capture-mark-recapture framework, I found that the apparent survival of breeders was higher than helpers, and the survival of males was higher than females. Juveniles were much more likely to become helpers rather than breeders following fledging, and helpers were more likely to remain helpers rather than becoming a breeder. Both survival and transition rates varied annually and were positively influenced by the acorn crop. For fitness estimation, I focused only on reproductive females who were banded as juveniles. Although helpers began reproduction significantly later and lived significantly longer than breeders, there was no significant difference in lifetime reproductive success or individual fitness between the two groups. However, birds that successfully bred at age 1 without helping had a significantly higher fitness than those who helped and successfully bred at age 2 or older. My results suggest that delayed dispersal and reproduction in the acorn woodpecker lead to a loss of fitness when conditions are favorable for successful reproduction. However, if constraints in the environment prevent an individual from breeding at age 1, helping is a viable option until reproduction is possible.
Dispersal Dynamics of the Cooperatively Breeding Acorn Woodpecker
Author: Philip Norman Hooge
Publisher:
ISBN:
Category : Acorn woodpecker
Languages : en
Pages : 400
Book Description
Publisher:
ISBN:
Category : Acorn woodpecker
Languages : en
Pages : 400
Book Description
Movement Patterns and Nest Site Selection in the Cooperatively Breeding Acorn Woodpecker Melanerpes Formicivorus
Author: Philip Norman Hooge
Publisher:
ISBN:
Category :
Languages : en
Pages : 222
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 222
Book Description
Population Ecology of the Cooperatively Breeding Acorn Woodpecker. (MPB-24), Volume 24
Author: Walter D. Koenig
Publisher: Princeton University Press
ISBN: 0691209626
Category : Science
Languages : en
Pages : 458
Book Description
Ever since the acorn woodpecker was observed and described by Spanish explorers, its behavior--particularly the unique habit of caching acorns in specialized storage trees or granaries--has impressed observers. Acorn woodpeckers are also one of the few temperate zone species in which young are reared communally in family groups. This demographic study investigates the complexities of acorn storage and group living in acorn woodpeckers at Hastings Reservation in central coastal California. It is one of the most thorough studies of any avian social system to date.
Publisher: Princeton University Press
ISBN: 0691209626
Category : Science
Languages : en
Pages : 458
Book Description
Ever since the acorn woodpecker was observed and described by Spanish explorers, its behavior--particularly the unique habit of caching acorns in specialized storage trees or granaries--has impressed observers. Acorn woodpeckers are also one of the few temperate zone species in which young are reared communally in family groups. This demographic study investigates the complexities of acorn storage and group living in acorn woodpeckers at Hastings Reservation in central coastal California. It is one of the most thorough studies of any avian social system to date.
The Birds of North America
Author:
Publisher:
ISBN:
Category : Birds
Languages : en
Pages : 424
Book Description
Publisher:
ISBN:
Category : Birds
Languages : en
Pages : 424
Book Description
Hatching Asynchrony in the Green-rumped Parrotlet
Author: Scott Harley Stoleson
Publisher:
ISBN:
Category :
Languages : en
Pages : 308
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 308
Book Description
American Doctoral Dissertations
Author:
Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 724
Book Description
Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 724
Book Description
Dissertation Abstracts International
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 792
Book Description
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 792
Book Description