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dc.contributor.author
Irigoyen, Alejo Joaquin
dc.contributor.author
Galvan, David Edgardo
dc.contributor.author
Venerus, Leonardo Ariel
dc.contributor.author
Parma, Ana Maria
dc.date.available
2015-05-22T19:00:51Z
dc.date.issued
2013-04-04
dc.identifier.citation
Irigoyen, Alejo Joaquin; Galvan, David Edgardo; Venerus, Leonardo Ariel; Parma, Ana Maria; Variability in Abundance of Temperate Reef Fishes Estimated by Visual Census; Public Library Science; Plos One; 8; 4-4-2013; 1-12;
dc.identifier.issn
1932-6203
dc.identifier.uri
http://hdl.handle.net/11336/530
dc.description.abstract
Identifying sources of sampling variation and quantifying their magnitude is critical to the interpretation of ecological field data. Yet, most monitoring programs of reef fish populations based on underwater visual censuses (UVC) consider only a few of the factors that may influence fish counts, such as the diver or census methodology. Recent studies, however, have drawn attention to a broader range of processes that introduce variability at different temporal scales. This study analyzes the magnitude of different sources of variation in UVCs of temperate reef fishes off Patagonia (Argentina). The variability associated with time-of-day, tidal state, and time elapsed between censuses (minutes, days, weeks and months) was quantified for censuses conducted on the five most conspicuous and common species: Pinguipes brasilianus, Pseudopercis semifasciata, Sebastes oculatus, Acanthistius patachonicus and Nemadactylus bergi. Variance components corresponding to spatial heterogeneity and to the different temporal scales were estimated using nested random models. The levels of variability estimated for the different species were related to their life history attributes and behavior. Neither time-of-day nor tidal state had a significant effect on counts, except for the influence of tide on P. brasilianus. Spatial heterogeneity was the dominant source of variance in all but one species. Among the temporal scales, the intra-annual variation was the highest component for most species due to marked seasonal fluctuations in abundance, followed by the weekly and the instantaneous variation; the daily component was not significant. The variability between censuses conducted at different tidal levels and time-of-day was similar in magnitude to the instantaneous variation, reinforcing the conclusion that stochastic variation at very short time scales is non-negligible and should be taken into account in the design of monitoring programs and experiments. The present study provides baseline information to design and interpret results from visual census programs in temperate reefs.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Public Library Science
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Sampling Variation
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Sampling Design
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Rocky Reef
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Monitoring
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Patagonia
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Mixed Models
dc.subject.classification
Ciencias Naturales y Exactas
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Ciencias Biológicas
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Ecología
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Ciencias Naturales y Exactas
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Ciencias de la Tierra y Relacionadas Con El Medio Ambiente
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Otras Ciencias de la Tierra y Relacionadas Con El Medio Ambiente
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Ciencias Naturales y Exactas
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Ciencias Biológicas
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Biología Marina, Limnología
dc.title
Variability in Abundance of Temperate Reef Fishes Estimated by Visual Census
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-03-30 10:35:44.97925-03
dc.journal.volume
8
dc.journal.pagination
1-12
dc.journal.pais
Estados Unidos
dc.journal.ciudad
San Francisco
dc.description.fil
Fil: Irigoyen, Alejo Joaquin. Consejo Nacional de Invest.cientif.y Tecnicas. Centro Nacional Patagonico;
dc.description.fil
Fil: Galvan, David Edgardo. Consejo Nacional de Invest.cientif.y Tecnicas. Centro Nacional Patagonico;
dc.description.fil
Fil: Venerus, Leonardo Ariel. Consejo Nacional de Invest.cientif.y Tecnicas. Centro Nacional Patagonico;
dc.description.fil
Fil: Parma, Ana Maria. Consejo Nacional de Invest.cientif.y Tecnicas. Centro Nacional Patagonico;
dc.journal.title
Plos One
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1371/journal.pone.0061072
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://dx.plos.org/10.1371/journal.pone.0061072


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