Florida Scrub Jay
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The Florida Scrub Jay Mpb 20 Volume 20
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Author : Glen Everett Woolfenden
language : en
Publisher: Princeton University Press
Release Date : 2020-03-31
The Florida Scrub Jay Mpb 20 Volume 20 written by Glen Everett Woolfenden and has been published by Princeton University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-03-31 with Science categories.
Florida Scrub Jays are an excellent example of a cooperative-breeding species, in which adult birds often help raise offspring not their own. For more than a decade Glen E. Woolfenden and John W. Fitzpatrick studied a marked population of these birds in an attempt to establish a demographic base for understanding the phenomenon of "helping at the nest." By studying both population biology and behavior, the authors found that habitat restraints, rather than kin selection, are the main source of the behavior of Florida Scrub Jays: the goal of increasing the number of close relatives other than descendants in future generations is of relatively minor importance in their cooperative-breeding behavior. The Florida Scrub Jay lives only in the Florida oak scrub. All acceptable habitat is constantly filled with breeders. Each year about half of the pairs are assisted by one to several nonbreeding helpers. This book provides extensive data on fecundity, survivorship, relatedness, and dispersal to establish the demographic milieu and to address questions arising out of observed helping behavior--whom, how, when, and why the helpers help.
Recovery Plan For The Florida Scrub Jay
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Author :
language : en
Publisher:
Release Date : 1990
Recovery Plan For The Florida Scrub Jay written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Birds categories.
Florida Scrub Jay
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Author : Mark Jerome Walters
language : en
Publisher: University Press of Florida
Release Date : 2021-02-08
Florida Scrub Jay written by Mark Jerome Walters and has been published by University Press of Florida this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-02-08 with Nature categories.
Florida Historical Society Stetson Kennedy Award A portrait of a species on the brink The only bird species that lives exclusively in Florida, the Florida scrub-jay was once common across the peninsula. But as development over the last 100 years reduced the habitat on which the bird depends from 39 counties to three, the species became endangered. With a writer’s eye and an explorer’s spirit, Mark Walters travels the state to report on the natural history and current predicament of Florida’s flagship bird. Tracing the millions of years of evolution and migration that led to the development of songbirds and this unique species of jay, Walters describes the Florida bird’s long, graceful tail, its hues that blend from one to the next, and its notoriously friendly manner. He then focuses on the massive land-reclamation and canal-building projects of the twentieth century that ate away at the ancient oak scrub heartlands where the bird was abundant, reducing its population by 90 percent. Walters also investigates conservation efforts taking place today. On a series of field excursions, he introduces the people who are leading the charge to save the bird from extinction—those who gather for annual counts of the species in fragmented and overlooked areas of scrub; those who relocate populations of scrub-jays out of harm’s way; those who survey and purchase land to create wildlife refuges; and those who advocate for the prescribed fires that keep scrub ecosystems inhabitable for the species. A loving portrayal of a very special bird, Florida Scrub-Jay is also a thoughtful reflection on the ethical and emotional weight of protecting a species in an age of catastrophe. Now is the time to act, says Walters, or we will lose the scrub-jay forever.
The Florida Scrub Jay
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Author : Glen Everett Woolfenden
language : en
Publisher:
Release Date : 1984
The Florida Scrub Jay written by Glen Everett Woolfenden and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Science categories.
Florida Scrub Jays are an excellent example of a cooperative-breeding species, in which adult birds often help raise offspring not their own. For more than a decade Glen E. Woolfenden and John W. Fitzpatrick studied a marked population of these birds in an attempt to establish a demographic base for understanding the phenomenon of "helping at the nest." By studying both population biology and behavior, the authors found that habitat restraints, rather than kin selection, are the main source of the behavior of Florida Scrub Jays: the goal of increasing the number of close relatives other than descendants in future generations is of relatively minor importance in their cooperative-breeding behavior. The Florida Scrub Jay lives only in the Florida oak scrub. All acceptable habitat is constantly filled with breeders. Each year about half of the pairs are assisted by one to several nonbreeding helpers. This book provides extensive data on fecundity, survivorship, relatedness, and dispersal to establish the demographic milieu and to address questions arising out of observed helping behavior--whom, how, when, and why the helpers help.
Distribution Habitat And Social Organization Of The Florida Scrub Jay
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Author : Jeffrey Cox
language : en
Publisher:
Release Date : 2019-05-31
Distribution Habitat And Social Organization Of The Florida Scrub Jay written by Jeffrey Cox and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-05-31 with Science categories.
Abstract: Florida Scrub Jays (FSJs) have declined significantly in numbers because of habitat destruction. FSJs have disappeared entirely from six counties in Florida, and their numbers have decreased substantially in seven additional counties. I estimated the total population size in 1982 to be 15,330-22,530 birds, of which 13,100-20,310 were on protected sites. FSJ numbers will continue to decline as the commercial development of Florida proceeds, but the total population size should stabilize at about 12,780-19,780 birds in a few decades. The greatest densities of FSJs are in areas with oak thickets 1-3m tall covering 50-75% of the ground, 10-5-% bare ground, and scattered small trees. Some FSJ populations, however, are found in areas with very few oaks, demonstrating their ability to survive in marginal habitats. Fire is effective, and sometimes essential, in maintaining the habitat in a suitable condition. Mechanical clearing of vegetation, including clear-cutting in Ocala National Forest (ONF), can be an effective substitute for fire. Scrub Jays in ONF inhabit stands of sand pine scrub clearcut from 1965-1978. Clearcuts can support FSJs only from about 3-5 to 12-15 years after clearing. By the time a young male FSJ is old enough to claim part of his parents' territory, the habitat may no longer be suitable. Because of the continual creation of new habitat, FSJs in ONF are found in smaller groups than those at Archbold Biological Station, Florida. Blue Jays in Florida typically breed as pairs, but one nest was found that was attended by two males and one female. Behavior of the adults at this nest suggests that this incident was unusual. Florida Blue Jays do not defend territories, but have broadly overlapping home ranges. The evolution of cooperative breeding in New World jays is discussed. Some of the observed forms of cooperative breeding may not be adaptive, but represent either responses to life in heavily disturbed habitats or the expression of normal parental behavior before a bird becomes a breeder. Dissertation Discovery Company and University of Florida are dedicated to making scholarly works more discoverable and accessible throughout the world. This dissertation, "Distribution Habitat and Social Organization of the Florida Scrub Jay" by Jeffrey A. Cox, was obtained from University of Florida and is being sold with permission from the author. A digital copy of this work may also be found in the university's institutional repository, IR@UF. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation.
Status And Distribution Of The Florida Scrub Jay
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Author : Jeffrey A. Cox
language : en
Publisher:
Release Date : 1987
Status And Distribution Of The Florida Scrub Jay written by Jeffrey A. Cox and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Birds categories.
Habitat Model For The Florida Scrub Jay On John F Kennedy Space Center
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Author : National Aeronautics and Space Adm Nasa
language : en
Publisher:
Release Date : 2018-11-07
Habitat Model For The Florida Scrub Jay On John F Kennedy Space Center written by National Aeronautics and Space Adm Nasa and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-11-07 with categories.
The Florida Scrub Jay is endemic to Florida. The John F. Kennedy Space Center (KSC) provides habitat for one of the three largest populations of the Florida Scrub Jay. This threatened bird occupies scrub, slash pine flatwoods, disturbed scrub, and coastal strand on KSC. Densities of Florida Scrub Jays were shown to vary with habitat characteristics but not necessarily with vegetation type. Relationships between Florida Scrub Jay densities and habitat characteristics were used to develop a habitat model to provide a tool to compare alternative sites for new facilities and to quantify environmental impacts. This model is being tested using long term demographic studies of colorbanded Florida Scrub Jays. Optimal habitat predicted by the model has greater than or equal to 50 percent of the shrub canopy comprised of scrub oaks, 20-50 percent open space or scrub oak vegetation within 100 m of a ruderal edge, less than or equal to 15 percent pine canopy cover, a shrub height of 120-170 cm, and is greater than or equal to 100 m from a forest. This document reviews life history, social behavior, food, foraging habitat, cover requirements, characteristics of habitat on KSC, and habitat preferences of the Florida Scrub Jay. Construction of the model and its limitations are discussed. Breininger, David R. Unspecified Center...
The Molt Of Scrub Jays And Blue Jays In Florida
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Author : G. Thomas Bancroft
language : en
Publisher: American Ornithologists Union
Release Date : 1982
The Molt Of Scrub Jays And Blue Jays In Florida written by G. Thomas Bancroft and has been published by American Ornithologists Union this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Nature categories.
The Love Lives Of Birds
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Author : Laura Erickson
language : en
Publisher: Hachette UK
Release Date : 2020-10-27
The Love Lives Of Birds written by Laura Erickson and has been published by Hachette UK this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-10-27 with Nature categories.
Ornithologist Laura Erickson combines her bird expertise with a touch of romance writing in this exploration of the courtship and mating rituals of 35 bird species, from the tiny ruby-throated hummingbird to the mighty great blue heron.
Reproductive Ecology Of The Florida Scrub Jay Aphelocoma Coerulescens On John F Kennedy Space Center Merritt Island National Wildlife Refuge
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Author : National Aeronautics and Space Adm Nasa
language : en
Publisher:
Release Date : 2018-09-29
Reproductive Ecology Of The Florida Scrub Jay Aphelocoma Coerulescens On John F Kennedy Space Center Merritt Island National Wildlife Refuge written by National Aeronautics and Space Adm Nasa and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-29 with categories.
From 1988 to 2002 we studied the breeding ecology of Florida Scrub-Jays (Aphelocoma coerulescens) on John F. Kennedy Space Center/Merritt Island National Wildlife Refuge. We examined phenology, clutch size, hatching failure rates, fledgling production, nest success, predation rates, sources egg and nestling mortality, and the effects of helpers on these measures. Nesting phenology was similar among sites. Mean clutch size at Titan was significantly larger than at HC or T4. Pairs with helpers did not produce larger clutches than pairs without helpers. Fledgling production at T4 was significantly greater than at HC and similar to Titan. Pairs with helpers at HC produced significantly more fledglings than pairs without helpers; helpers did not influence fledgling production at the other sites. Nest success at HC and Titan was low, 19% and 32% respectively. Nest success at T4 was 48% and was significantly greater than at HC. Average predation rates at all sites increased with season progression. Predation rates at all sight rose sharply by early June. The main cause of nest failure at all sites was predation, 93%. Carter, Geoffry M. and Breininger, David R. and Larson, Vicky L. and Oddy, Donna M. and Smith, Rebecca B. and Stolen, Eric D. Kennedy Space Center NASA/TM-2005-212562...