Generalized additive models to predict adult and young brown trout (Salmo trutta Linnaeus, 1758) densities in Mediterranean rivers

Habitat suitability models (HSM) are concerned with the abundance or distribution of species as a consequence of interactions with the physical environment. Generalized Additive Models (GAMs) were used to model brown trout (Salmo trutta L.) density as a function of environmental variables at the sca...

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Autores: Alcaraz-Hernández, Juan Diego, Muñoz Mas, Rafael, Vezza, Paolo, Martinez-Capel, Francisco|||0000-0003-4991-0251, Garófano-Gómez, Virginia|||0000-0001-5516-5695
Formato: artículo
Fecha de publicación:2016
País:España
Recursos:Universitat Politècnica de València (UPV)
Repositorio:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglés
OAI Identifier:oai:riunet.upv.es:10251/64821
Acesso em linha:https://riunet.upv.es/handle/10251/64821
Access Level:acceso abierto
Palavra-chave:Generalized additive models
Salmo trutta
Habitat suitability models
Hydromorphological units
Mesohabitat
TECNOLOGIA DEL MEDIO AMBIENTE
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dc.title.none.fl_str_mv Generalized additive models to predict adult and young brown trout (Salmo trutta Linnaeus, 1758) densities in Mediterranean rivers
title Generalized additive models to predict adult and young brown trout (Salmo trutta Linnaeus, 1758) densities in Mediterranean rivers
spellingShingle Generalized additive models to predict adult and young brown trout (Salmo trutta Linnaeus, 1758) densities in Mediterranean rivers
Alcaraz-Hernández, Juan Diego
Generalized additive models
Salmo trutta
Habitat suitability models
Hydromorphological units
Mesohabitat
TECNOLOGIA DEL MEDIO AMBIENTE
title_short Generalized additive models to predict adult and young brown trout (Salmo trutta Linnaeus, 1758) densities in Mediterranean rivers
title_full Generalized additive models to predict adult and young brown trout (Salmo trutta Linnaeus, 1758) densities in Mediterranean rivers
title_fullStr Generalized additive models to predict adult and young brown trout (Salmo trutta Linnaeus, 1758) densities in Mediterranean rivers
title_full_unstemmed Generalized additive models to predict adult and young brown trout (Salmo trutta Linnaeus, 1758) densities in Mediterranean rivers
title_sort Generalized additive models to predict adult and young brown trout (Salmo trutta Linnaeus, 1758) densities in Mediterranean rivers
dc.creator.none.fl_str_mv Alcaraz-Hernández, Juan Diego
Muñoz Mas, Rafael
Vezza, Paolo
Martinez-Capel, Francisco|||0000-0003-4991-0251
Garófano-Gómez, Virginia|||0000-0001-5516-5695
author Alcaraz-Hernández, Juan Diego
author_facet Alcaraz-Hernández, Juan Diego
Muñoz Mas, Rafael
Vezza, Paolo
Martinez-Capel, Francisco|||0000-0003-4991-0251
Garófano-Gómez, Virginia|||0000-0001-5516-5695
author_role author
author2 Muñoz Mas, Rafael
Vezza, Paolo
Martinez-Capel, Francisco|||0000-0003-4991-0251
Garófano-Gómez, Virginia|||0000-0001-5516-5695
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Departamento de Ingeniería Hidráulica y Medio Ambiente
Departamento de Economía y Ciencias Sociales
Escuela Politécnica Superior de Gandia
Instituto de Investigación para la Gestión Integrada de Zonas Costeras
Ministerio de Ciencia e Innovación
Universitat Politècnica de València
Confederación Hidrográfica del Júcar
Generalitat Valenciana
Repositorio Institucional de la Universitat Politècnica de València Riunet
dc.subject.none.fl_str_mv Generalized additive models
Salmo trutta
Habitat suitability models
Hydromorphological units
Mesohabitat
TECNOLOGIA DEL MEDIO AMBIENTE
topic Generalized additive models
Salmo trutta
Habitat suitability models
Hydromorphological units
Mesohabitat
TECNOLOGIA DEL MEDIO AMBIENTE
description Habitat suitability models (HSM) are concerned with the abundance or distribution of species as a consequence of interactions with the physical environment. Generalized Additive Models (GAMs) were used to model brown trout (Salmo trutta L.) density as a function of environmental variables at the scale of river reach and hydromorphological units (HMU) in the Jucar River Basin (Eastern Spain). After 4years of observations (2003-2006) the data representing trout density were split into two categories, young (<2years) and adult (2years), for modelling independently. The environmental descriptors at reach-scale described the geographical position, hydrological conditions, proportions and diversity of habitats. At the scale of HMUs (pool, glide, riffle or rapid), habitat descriptors representing dimensions, substrate, cover and velocity were used. The best and parsimonious GAM for each category was selected after a comprehensive trial of all possible combinations of input variables. The models explained 61% (adult) and 75% (young) of the variability of the data (R(2)adj). The results demonstrated the relevance of mean width, mean depth, cover index, mean velocity and slope for adult brown trout. Young trout densities were mainly related to maximum depths, cover index, mean velocity, elevation, average distance between rapids and number of slow water HMUs. This article shows the relevance of considering geographical and habitat-related requirements at different scales to describe the patterns of trout density. Furthermore, the importance of considering non-linear relationships with habitat variables was demonstrated. The results are useful for environmental managers to design effective and science-based restoration measures, and result in a more efficient management of brown trout populations.
publishDate 2016
dc.date.none.fl_str_mv 2016
2016-02-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://riunet.upv.es/handle/10251/64821
url https://riunet.upv.es/handle/10251/64821
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Ministerio de Ciencia e Innovación http://dx.doi.org/10.13039/501100004837 CSD2009-00065 Evaluación y predicción de los efectos del cambio global en la cantidad y la calidad del agua en ríos ibéricos
Universitat Politècnica de València https://doi.org/10.13039/501100004233 UPPTE%2F2012%2F294
Universitat Politècnica de València https://doi.org/10.13039/501100004233 PAID-06-12
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Reserva de todos los derechos
http://rightsstatements.org/vocab/InC/1.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Reserva de todos los derechos
http://rightsstatements.org/vocab/InC/1.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley: 12 months
publisher.none.fl_str_mv Wiley: 12 months
dc.source.none.fl_str_mv reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
instname:Universitat Politècnica de València (UPV)
instname_str Universitat Politècnica de València (UPV)
reponame_str RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
collection RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
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repository.mail.fl_str_mv
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spelling Generalized additive models to predict adult and young brown trout (Salmo trutta Linnaeus, 1758) densities in Mediterranean riversAlcaraz-Hernández, Juan DiegoMuñoz Mas, RafaelVezza, PaoloMartinez-Capel, Francisco|||0000-0003-4991-0251Garófano-Gómez, Virginia|||0000-0001-5516-5695Generalized additive modelsSalmo truttaHabitat suitability modelsHydromorphological unitsMesohabitatTECNOLOGIA DEL MEDIO AMBIENTEHabitat suitability models (HSM) are concerned with the abundance or distribution of species as a consequence of interactions with the physical environment. Generalized Additive Models (GAMs) were used to model brown trout (Salmo trutta L.) density as a function of environmental variables at the scale of river reach and hydromorphological units (HMU) in the Jucar River Basin (Eastern Spain). After 4years of observations (2003-2006) the data representing trout density were split into two categories, young (<2years) and adult (2years), for modelling independently. The environmental descriptors at reach-scale described the geographical position, hydrological conditions, proportions and diversity of habitats. At the scale of HMUs (pool, glide, riffle or rapid), habitat descriptors representing dimensions, substrate, cover and velocity were used. The best and parsimonious GAM for each category was selected after a comprehensive trial of all possible combinations of input variables. The models explained 61% (adult) and 75% (young) of the variability of the data (R(2)adj). The results demonstrated the relevance of mean width, mean depth, cover index, mean velocity and slope for adult brown trout. Young trout densities were mainly related to maximum depths, cover index, mean velocity, elevation, average distance between rapids and number of slow water HMUs. This article shows the relevance of considering geographical and habitat-related requirements at different scales to describe the patterns of trout density. Furthermore, the importance of considering non-linear relationships with habitat variables was demonstrated. The results are useful for environmental managers to design effective and science-based restoration measures, and result in a more efficient management of brown trout populations.This study was partially funded by the Generalitat Valenciana (Conselleria de Territorio y Vivienda) and the Spanish Ministry of Economy and Competitiveness with the project SCARCE (Consolider-Ingenio 2010 CSD2009-00065). This work was also funded by the Universitat Politecnica de Valencia, through the project UPPTE/2012/294 (PAID-06-12). Authors also give thanks to the help of the Confederacion Hidrografica del Jucar (Gobierno de Espana), which provided environmental data, and to all colleagues who collaborated in the field data collection.Wiley: 12 monthsDepartamento de Ingeniería Hidráulica y Medio AmbienteDepartamento de Economía y Ciencias SocialesEscuela Politécnica Superior de GandiaInstituto de Investigación para la Gestión Integrada de Zonas CosterasMinisterio de Ciencia e InnovaciónUniversitat Politècnica de ValènciaConfederación Hidrográfica del JúcarGeneralitat ValencianaRepositorio Institucional de la Universitat Politècnica de València Riunet20162016-02-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://riunet.upv.es/handle/10251/64821reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valénciainstname:Universitat Politècnica de València (UPV)InglésengMinisterio de Ciencia e Innovación http://dx.doi.org/10.13039/501100004837 CSD2009-00065 Evaluación y predicción de los efectos del cambio global en la cantidad y la calidad del agua en ríos ibéricosUniversitat Politècnica de València https://doi.org/10.13039/501100004233 UPPTE%2F2012%2F294Universitat Politècnica de València https://doi.org/10.13039/501100004233 PAID-06-12open accesshttp://purl.org/coar/access_right/c_abf2Reserva de todos los derechoshttp://rightsstatements.org/vocab/InC/1.0/info:eu-repo/semantics/openAccessoai:riunet.upv.es:10251/648212026-06-13T07:49:27Z
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