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Behavioral modifications lead to disparate demographic consequences in two sympatric species

Life‐history theory suggests species that typically have a large number of offspring and high adult mortality may make decisions that benefit offspring survival in exchange for increased adult risks. Such behavioral adaptations are essential to understanding how demographic performance is linked to...

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Autores principales: Tanner, Evan P., Orange, Jeremy P., Davis, Craig A., Elmore, R. Dwayne, Fuhlendorf, Samuel D.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6706238/
https://www.ncbi.nlm.nih.gov/pubmed/31463020
http://dx.doi.org/10.1002/ece3.5472
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author Tanner, Evan P.
Orange, Jeremy P.
Davis, Craig A.
Elmore, R. Dwayne
Fuhlendorf, Samuel D.
author_facet Tanner, Evan P.
Orange, Jeremy P.
Davis, Craig A.
Elmore, R. Dwayne
Fuhlendorf, Samuel D.
author_sort Tanner, Evan P.
collection PubMed
description Life‐history theory suggests species that typically have a large number of offspring and high adult mortality may make decisions that benefit offspring survival in exchange for increased adult risks. Such behavioral adaptations are essential to understanding how demographic performance is linked to habitat selection during this important life‐history stage. Though studies have illustrated negative fitness consequences to attendant adults or potential fitness benefits to associated offspring because of adaptive habitat selection during brood rearing, equivocal relationships could arise if both aspects of this reproductive trade‐off are not assessed simultaneously. To better understand how adaptive habitat selection during brood rearing influences demographics, we studied the brood survival, attendant parental survival, and space use of two sympatric ground‐nesting bird species, the northern bobwhite (hereafter: “bobwhite”; Colinus virgininanus) and scaled quail (Callipepla squamata). During the 2013–2014 breeding seasons, we estimated habitat suitability across two grains (2 m and 30 m) for both species and determined how adult space use of these areas influenced individual chick survival and parental risk. We found the proportion of a brood's home range containing highly suitable areas significantly increased bobwhite chick survival (β = 0.02, SE = 0.006). Additionally, adult weekly survival for bobwhite was greater for individuals not actively brooding offspring (0.9716, SE = 0.0054) as compared to brooding adults (0.8928, SE = 0.0006). Conversely, brood habitat suitability did not influence scaled quail chick survival during our study, nor did we detect a survival cost for adults that were actively brooding offspring. Our research illustrates the importance of understanding life‐history strategies and how they might influence relationships between adaptive habitat selection and demographic parameters.
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spelling pubmed-67062382019-08-28 Behavioral modifications lead to disparate demographic consequences in two sympatric species Tanner, Evan P. Orange, Jeremy P. Davis, Craig A. Elmore, R. Dwayne Fuhlendorf, Samuel D. Ecol Evol Original Research Life‐history theory suggests species that typically have a large number of offspring and high adult mortality may make decisions that benefit offspring survival in exchange for increased adult risks. Such behavioral adaptations are essential to understanding how demographic performance is linked to habitat selection during this important life‐history stage. Though studies have illustrated negative fitness consequences to attendant adults or potential fitness benefits to associated offspring because of adaptive habitat selection during brood rearing, equivocal relationships could arise if both aspects of this reproductive trade‐off are not assessed simultaneously. To better understand how adaptive habitat selection during brood rearing influences demographics, we studied the brood survival, attendant parental survival, and space use of two sympatric ground‐nesting bird species, the northern bobwhite (hereafter: “bobwhite”; Colinus virgininanus) and scaled quail (Callipepla squamata). During the 2013–2014 breeding seasons, we estimated habitat suitability across two grains (2 m and 30 m) for both species and determined how adult space use of these areas influenced individual chick survival and parental risk. We found the proportion of a brood's home range containing highly suitable areas significantly increased bobwhite chick survival (β = 0.02, SE = 0.006). Additionally, adult weekly survival for bobwhite was greater for individuals not actively brooding offspring (0.9716, SE = 0.0054) as compared to brooding adults (0.8928, SE = 0.0006). Conversely, brood habitat suitability did not influence scaled quail chick survival during our study, nor did we detect a survival cost for adults that were actively brooding offspring. Our research illustrates the importance of understanding life‐history strategies and how they might influence relationships between adaptive habitat selection and demographic parameters. John Wiley and Sons Inc. 2019-07-24 /pmc/articles/PMC6706238/ /pubmed/31463020 http://dx.doi.org/10.1002/ece3.5472 Text en © 2019 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research
Tanner, Evan P.
Orange, Jeremy P.
Davis, Craig A.
Elmore, R. Dwayne
Fuhlendorf, Samuel D.
Behavioral modifications lead to disparate demographic consequences in two sympatric species
title Behavioral modifications lead to disparate demographic consequences in two sympatric species
title_full Behavioral modifications lead to disparate demographic consequences in two sympatric species
title_fullStr Behavioral modifications lead to disparate demographic consequences in two sympatric species
title_full_unstemmed Behavioral modifications lead to disparate demographic consequences in two sympatric species
title_short Behavioral modifications lead to disparate demographic consequences in two sympatric species
title_sort behavioral modifications lead to disparate demographic consequences in two sympatric species
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6706238/
https://www.ncbi.nlm.nih.gov/pubmed/31463020
http://dx.doi.org/10.1002/ece3.5472
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