Truncated power laws reveal a link between low-level behavioral processes and grouping patterns in a colonial bird.

<h4>Background</h4>Departures from power law group size frequency distributions have been proposed as a useful tool to link individual behavior with population patterns and dynamics, although examples are scarce for wild animal populations.<h4>Methodology/principal findings</h4&...

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Autores principales:	Roger Jovani, David Serrano, Esperanza Ursúa, José L Tella
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2008
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/fbb15ea0991a4991a2139fb5e8571aec
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spelling	oai:doaj.org-article:fbb15ea0991a4991a2139fb5e8571aec2021-11-25T06:12:45ZTruncated power laws reveal a link between low-level behavioral processes and grouping patterns in a colonial bird.1932-620310.1371/journal.pone.0001992https://doaj.org/article/fbb15ea0991a4991a2139fb5e8571aec2008-04-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/18431479/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>Departures from power law group size frequency distributions have been proposed as a useful tool to link individual behavior with population patterns and dynamics, although examples are scarce for wild animal populations.<h4>Methodology/principal findings</h4>We studied a population of Lesser kestrels (Falco naumanni) breeding in groups (colonies) from one to ca. 40 breeding pairs in 10,000 km(2) in NE Spain. A 3.5 fold steady population increase occurred during the eight-year study period, accompanied by a geographical expansion from an initial subpopulation which in turn remained stable in numbers. This population instability was mainly driven by first-breeders, which are less competitive at breeding sites, being relegated to breed solitarily or in small colony sizes, and disperse farther than adults. Colony size frequency distributions shifted from an initial power law to a truncated power law mirroring population increase. Thus, we hypothesized that population instability was behind the truncation of the power law. Accordingly, we found a power law distribution through years in the initial subpopulation, and a match between the power law breakpoint (at ca. ten pairs) and those colony sizes from which the despotic behavior of colony owners started to impair the settlement of newcomers. Moreover, the instability hypothesis was further supported by snapshot data from another population of Lesser kestrels in SW Spain suffering a population decline.<h4>Conclusions/significance</h4>Appropriate analysis of the scaling properties of grouping patterns has unraveled the link between local agonistic processes and large-scale (population) grouping patterns in a wild bird population.Roger JovaniDavid SerranoEsperanza UrsúaJosé L TellaPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 3, Iss 4, p e1992 (2008)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Roger Jovani David Serrano Esperanza Ursúa José L Tella Truncated power laws reveal a link between low-level behavioral processes and grouping patterns in a colonial bird.
description	<h4>Background</h4>Departures from power law group size frequency distributions have been proposed as a useful tool to link individual behavior with population patterns and dynamics, although examples are scarce for wild animal populations.<h4>Methodology/principal findings</h4>We studied a population of Lesser kestrels (Falco naumanni) breeding in groups (colonies) from one to ca. 40 breeding pairs in 10,000 km(2) in NE Spain. A 3.5 fold steady population increase occurred during the eight-year study period, accompanied by a geographical expansion from an initial subpopulation which in turn remained stable in numbers. This population instability was mainly driven by first-breeders, which are less competitive at breeding sites, being relegated to breed solitarily or in small colony sizes, and disperse farther than adults. Colony size frequency distributions shifted from an initial power law to a truncated power law mirroring population increase. Thus, we hypothesized that population instability was behind the truncation of the power law. Accordingly, we found a power law distribution through years in the initial subpopulation, and a match between the power law breakpoint (at ca. ten pairs) and those colony sizes from which the despotic behavior of colony owners started to impair the settlement of newcomers. Moreover, the instability hypothesis was further supported by snapshot data from another population of Lesser kestrels in SW Spain suffering a population decline.<h4>Conclusions/significance</h4>Appropriate analysis of the scaling properties of grouping patterns has unraveled the link between local agonistic processes and large-scale (population) grouping patterns in a wild bird population.
format	article
author	Roger Jovani David Serrano Esperanza Ursúa José L Tella
author_facet	Roger Jovani David Serrano Esperanza Ursúa José L Tella
author_sort	Roger Jovani
title	Truncated power laws reveal a link between low-level behavioral processes and grouping patterns in a colonial bird.
title_short	Truncated power laws reveal a link between low-level behavioral processes and grouping patterns in a colonial bird.
title_full	Truncated power laws reveal a link between low-level behavioral processes and grouping patterns in a colonial bird.
title_fullStr	Truncated power laws reveal a link between low-level behavioral processes and grouping patterns in a colonial bird.
title_full_unstemmed	Truncated power laws reveal a link between low-level behavioral processes and grouping patterns in a colonial bird.
title_sort	truncated power laws reveal a link between low-level behavioral processes and grouping patterns in a colonial bird.
publisher	Public Library of Science (PLoS)
publishDate	2008
url	https://doaj.org/article/fbb15ea0991a4991a2139fb5e8571aec
work_keys_str_mv	AT rogerjovani truncatedpowerlawsrevealalinkbetweenlowlevelbehavioralprocessesandgroupingpatternsinacolonialbird AT davidserrano truncatedpowerlawsrevealalinkbetweenlowlevelbehavioralprocessesandgroupingpatternsinacolonialbird AT esperanzaursua truncatedpowerlawsrevealalinkbetweenlowlevelbehavioralprocessesandgroupingpatternsinacolonialbird AT joseltella truncatedpowerlawsrevealalinkbetweenlowlevelbehavioralprocessesandgroupingpatternsinacolonialbird
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Truncated power laws reveal a link between low-level behavioral processes and grouping patterns in a colonial bird.

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