Modeled day-night biases in decapod assessment by bottom trawling survey

7 páginas, 3 figuras, 1 tabla.

Detalles Bibliográficos
Autores: Aguzzi, Jacopo, Bahamon, Nixon
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2009
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/56831
Acceso en línea:http://hdl.handle.net/10261/56831
Access Level:acceso abierto
Palabra clave:MEDITS
Diel pattern
Bottom trawl survey
Population assessment
Irradiance
Decapods
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spelling Modeled day-night biases in decapod assessment by bottom trawling surveyAguzzi, JacopoBahamon, NixonMEDITSDiel patternBottom trawl surveyPopulation assessmentIrradianceDecapods7 páginas, 3 figuras, 1 tabla.The activity rhythms of marine species may consistently bias demographic evaluation by bottom trawl survey, depending on the time of day. In this study, we examine occurrence data of selected commercial and non-commercial decapod species at different depths (0–800 m) of the western Mediterranean as produced by the Mediterranean international trawl survey (MEDITS) UE Program by sampling during daytime. In order to show how the activity rhythms and types of displacement (pelagic, nektobenthic and endobenthic) of different species can alter the occurrences determined by bottomtrawling, and to quantify relative bias, we modeled potential outcomes of a putative nocturnal MEDITS sampling. MEDITS and published data for studies with 24-h hauls were compared in order to obtain a folding correction factor. We found that the temporal bias of sampling is moderate when trawling is performed on the continental slope and more important when it occurs on the continental shelf. The configuration of daytime and nighttime occurrence data by depth was performed using non-metric multidimensional scaling (nMDS). For the daytime configuration, association with irradiance (PAR) was evaluated by fitting occurrence data with a generalized additive model (GAM). Symmetry in species assemblages was found according to depth (inflection point at 200 m depth) as a significant irradiance-dependence distribution pattern of occurrences that took place on the shelf, above 200 m depth. For the night configuration, the inflection point relaxed due to the active displacements of some species, mixing the assemblages reported in daytime data. Results of the present study indicated that a deep knowledge of the autoecology of decapod species as it relates to activity rhythms (including a precise assessment of displacement typology) is of importance in population distribution and biomass evaluation and also influences locally perceived biodiversity. Accordingly, bottom trawl surveys for population assessment should take into account the timing of sampling as a factor potentially biasing obtained abundances.This work was financed by the NORIT project (CTM20055-02034/MAR) and also funded by the Spanish Ministry of Education (CYCT, MEC). Jacopo Aguzzi is a Postdoctoral Fellow of the “JAE” Program (Education and Science Ministry-MEC, Spain).Peer reviewedElsevierConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201220122009info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttp://hdl.handle.net/10261/56831reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.fishres.2009.08.010Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/568312026-05-22T06:33:51Z
dc.title.none.fl_str_mv Modeled day-night biases in decapod assessment by bottom trawling survey
title Modeled day-night biases in decapod assessment by bottom trawling survey
spellingShingle Modeled day-night biases in decapod assessment by bottom trawling survey
Aguzzi, Jacopo
MEDITS
Diel pattern
Bottom trawl survey
Population assessment
Irradiance
Decapods
title_short Modeled day-night biases in decapod assessment by bottom trawling survey
title_full Modeled day-night biases in decapod assessment by bottom trawling survey
title_fullStr Modeled day-night biases in decapod assessment by bottom trawling survey
title_full_unstemmed Modeled day-night biases in decapod assessment by bottom trawling survey
title_sort Modeled day-night biases in decapod assessment by bottom trawling survey
dc.creator.none.fl_str_mv Aguzzi, Jacopo
Bahamon, Nixon
author Aguzzi, Jacopo
author_facet Aguzzi, Jacopo
Bahamon, Nixon
author_role author
author2 Bahamon, Nixon
author2_role author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv MEDITS
Diel pattern
Bottom trawl survey
Population assessment
Irradiance
Decapods
topic MEDITS
Diel pattern
Bottom trawl survey
Population assessment
Irradiance
Decapods
description 7 páginas, 3 figuras, 1 tabla.
publishDate 2009
dc.date.none.fl_str_mv 2009
2012
2012
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/56831
url http://hdl.handle.net/10261/56831
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.fishres.2009.08.010
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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