Preliminary assessment of the jellyfish bycatch captured off southern and southeastern Brazil

Macromedusoid forms of Hydrozoa, Scyphozoa and Cubozoa captured by different fishing gears active in south and southeast of Brazil were recorded on board by scientific observers. After each fishing operation, catch composition was quantified and precise information about the position of the catch wa...

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Autores principales:	Schroeder,Rafael, Branco,Joaquim O, Freitas,Felipe, Resgalla,Charrid
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2014
Materias:	macromedusae Rhacostoma atlanticum Olindias sambaquiensis bycatch southern and southeastern Brazil
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000200002
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spelling	oai:scielo:S0718-560X20140002000022014-05-30Preliminary assessment of the jellyfish bycatch captured off southern and southeastern BrazilSchroeder,RafaelBranco,Joaquim OFreitas,FelipeResgalla,Charrid macromedusae Rhacostoma atlanticum Olindias sambaquiensis bycatch southern and southeastern Brazil Macromedusoid forms of Hydrozoa, Scyphozoa and Cubozoa captured by different fishing gears active in south and southeast of Brazil were recorded on board by scientific observers. After each fishing operation, catch composition was quantified and precise information about the position of the catch was taken between 2008 and 2011. Macromedusae records have been systemized in order to analyze the spatial-temporal distribution, the areas of concentration of the identified species and their relationship with other components of the bycatch. Catch composition analyzed in 986 fishing tows, demonstrated that the participation of these organisms ranged from 6-16%, and the hydromedusae Rhacostoma atlanticum L. Agassiz, 1851 and Olindias sambaquiensis Müller, 1861 were the most abundant and widely distributed species. R. atlanticum was recorded between 20 and 140 m deep while O. sambaquiensis presented registers in shallower waters between 10 and 70 m. No other identified species has been recorded in depths greater than 60 m. Areas of high concentration included the north-central coast of Santa Catarina and Paraná, the northern part of São Paulo and the north-central portion of Rio Grande do Sul State. Although the participation of the macromedusae has been relatively low, in areas of elevated concentration, the relative importance was high, making its participation almost exclusive among other zoological groups. Those registers of abundance and the respective areas of high concentration of macromedusae, which were associated to high primary production sites, may serve as a theoretical reference of the abundance of these organisms for future studies that aim to evaluate possible changes in jellyfish populations.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.42 n.2 20142014-05-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000200002en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	macromedusae Rhacostoma atlanticum Olindias sambaquiensis bycatch southern and southeastern Brazil
spellingShingle	macromedusae Rhacostoma atlanticum Olindias sambaquiensis bycatch southern and southeastern Brazil Schroeder,Rafael Branco,Joaquim O Freitas,Felipe Resgalla,Charrid Preliminary assessment of the jellyfish bycatch captured off southern and southeastern Brazil
description	Macromedusoid forms of Hydrozoa, Scyphozoa and Cubozoa captured by different fishing gears active in south and southeast of Brazil were recorded on board by scientific observers. After each fishing operation, catch composition was quantified and precise information about the position of the catch was taken between 2008 and 2011. Macromedusae records have been systemized in order to analyze the spatial-temporal distribution, the areas of concentration of the identified species and their relationship with other components of the bycatch. Catch composition analyzed in 986 fishing tows, demonstrated that the participation of these organisms ranged from 6-16%, and the hydromedusae Rhacostoma atlanticum L. Agassiz, 1851 and Olindias sambaquiensis Müller, 1861 were the most abundant and widely distributed species. R. atlanticum was recorded between 20 and 140 m deep while O. sambaquiensis presented registers in shallower waters between 10 and 70 m. No other identified species has been recorded in depths greater than 60 m. Areas of high concentration included the north-central coast of Santa Catarina and Paraná, the northern part of São Paulo and the north-central portion of Rio Grande do Sul State. Although the participation of the macromedusae has been relatively low, in areas of elevated concentration, the relative importance was high, making its participation almost exclusive among other zoological groups. Those registers of abundance and the respective areas of high concentration of macromedusae, which were associated to high primary production sites, may serve as a theoretical reference of the abundance of these organisms for future studies that aim to evaluate possible changes in jellyfish populations.
author	Schroeder,Rafael Branco,Joaquim O Freitas,Felipe Resgalla,Charrid
author_facet	Schroeder,Rafael Branco,Joaquim O Freitas,Felipe Resgalla,Charrid
author_sort	Schroeder,Rafael
title	Preliminary assessment of the jellyfish bycatch captured off southern and southeastern Brazil
title_short	Preliminary assessment of the jellyfish bycatch captured off southern and southeastern Brazil
title_full	Preliminary assessment of the jellyfish bycatch captured off southern and southeastern Brazil
title_fullStr	Preliminary assessment of the jellyfish bycatch captured off southern and southeastern Brazil
title_full_unstemmed	Preliminary assessment of the jellyfish bycatch captured off southern and southeastern Brazil
title_sort	preliminary assessment of the jellyfish bycatch captured off southern and southeastern brazil
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000200002
work_keys_str_mv	AT schroederrafael preliminaryassessmentofthejellyfishbycatchcapturedoffsouthernandsoutheasternbrazil AT brancojoaquimo preliminaryassessmentofthejellyfishbycatchcapturedoffsouthernandsoutheasternbrazil AT freitasfelipe preliminaryassessmentofthejellyfishbycatchcapturedoffsouthernandsoutheasternbrazil AT resgallacharrid preliminaryassessmentofthejellyfishbycatchcapturedoffsouthernandsoutheasternbrazil
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Preliminary assessment of the jellyfish bycatch captured off southern and southeastern Brazil

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