Invertebrate bycatch in Patagonian scallop fishing grounds: a study case with data obtained by the On Board Observers Program

Since the beginning of the Patagonian scallop fishery Zygochlamys patagonica, in the Argentine Sea in 1996, an On-Board Observers Program (OBOP) was established at the National Institute of Fishery Research and Development (INIDEP). The general trends of the bycatch composition and biomass were anal...

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Autores principales:	Escolar,Mariana, Diez,Mariano, Hernández,Daniel, Marecos,Ángel, Campodónico,Silvana, Bremec,Claudia
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2009
Materias:	Argentine Sea fishing effort non-target species scallop fishery Zygochlamys patagonica
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572009000200010
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id	oai:scielo:S0718-19572009000200010
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spelling	oai:scielo:S0718-195720090002000102010-04-08Invertebrate bycatch in Patagonian scallop fishing grounds: a study case with data obtained by the On Board Observers ProgramEscolar,MarianaDiez,MarianoHernández,DanielMarecos,ÁngelCampodónico,SilvanaBremec,Claudia Argentine Sea fishing effort non-target species scallop fishery Zygochlamys patagonica Since the beginning of the Patagonian scallop fishery Zygochlamys patagonica, in the Argentine Sea in 1996, an On-Board Observers Program (OBOP) was established at the National Institute of Fishery Research and Development (INIDEP). The general trends of the bycatch composition and biomass were analysed from information on catches and fishing effort (219 trips, 575 samples), collected in five scallop beds between 39º and 44º S during the period 1997-2002, provided by the OBOP. Large variations in average density of bycatch and the presence of eight taxonomic groups were determined during the study period. Echinodermata was the dominant taxon in most of the scallop beds. Echinoderms and gastropods showed an increase in biomass and sessile organisms were scarce in the SWSAO bed, subjected to high and continuous fishing effort. In the SWTB bed, with the lowest fishing effort, sessile organisms showed a decrease during the study period, while no variations occurred in the case of echinoderms and gastropods. The mentioned groups, mainly scavengers and predators, would be favoured by fishing activity that increased food availability (discards and damaged organisms). Contrarily, potential settlement substrates as sessile organisms, decreased in areas with intensive fishing activities. We stress out the validity of this source of data, which widens the spatio-temporal coverage of the yearly stock assessment cruises and is optimal for producing long-term databases.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.44 n.2 20092009-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572009000200010en10.4067/S0718-19572009000200010
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Argentine Sea fishing effort non-target species scallop fishery Zygochlamys patagonica
spellingShingle	Argentine Sea fishing effort non-target species scallop fishery Zygochlamys patagonica Escolar,Mariana Diez,Mariano Hernández,Daniel Marecos,Ángel Campodónico,Silvana Bremec,Claudia Invertebrate bycatch in Patagonian scallop fishing grounds: a study case with data obtained by the On Board Observers Program
description	Since the beginning of the Patagonian scallop fishery Zygochlamys patagonica, in the Argentine Sea in 1996, an On-Board Observers Program (OBOP) was established at the National Institute of Fishery Research and Development (INIDEP). The general trends of the bycatch composition and biomass were analysed from information on catches and fishing effort (219 trips, 575 samples), collected in five scallop beds between 39º and 44º S during the period 1997-2002, provided by the OBOP. Large variations in average density of bycatch and the presence of eight taxonomic groups were determined during the study period. Echinodermata was the dominant taxon in most of the scallop beds. Echinoderms and gastropods showed an increase in biomass and sessile organisms were scarce in the SWSAO bed, subjected to high and continuous fishing effort. In the SWTB bed, with the lowest fishing effort, sessile organisms showed a decrease during the study period, while no variations occurred in the case of echinoderms and gastropods. The mentioned groups, mainly scavengers and predators, would be favoured by fishing activity that increased food availability (discards and damaged organisms). Contrarily, potential settlement substrates as sessile organisms, decreased in areas with intensive fishing activities. We stress out the validity of this source of data, which widens the spatio-temporal coverage of the yearly stock assessment cruises and is optimal for producing long-term databases.
author	Escolar,Mariana Diez,Mariano Hernández,Daniel Marecos,Ángel Campodónico,Silvana Bremec,Claudia
author_facet	Escolar,Mariana Diez,Mariano Hernández,Daniel Marecos,Ángel Campodónico,Silvana Bremec,Claudia
author_sort	Escolar,Mariana
title	Invertebrate bycatch in Patagonian scallop fishing grounds: a study case with data obtained by the On Board Observers Program
title_short	Invertebrate bycatch in Patagonian scallop fishing grounds: a study case with data obtained by the On Board Observers Program
title_full	Invertebrate bycatch in Patagonian scallop fishing grounds: a study case with data obtained by the On Board Observers Program
title_fullStr	Invertebrate bycatch in Patagonian scallop fishing grounds: a study case with data obtained by the On Board Observers Program
title_full_unstemmed	Invertebrate bycatch in Patagonian scallop fishing grounds: a study case with data obtained by the On Board Observers Program
title_sort	invertebrate bycatch in patagonian scallop fishing grounds: a study case with data obtained by the on board observers program
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2009
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572009000200010
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Invertebrate bycatch in Patagonian scallop fishing grounds: a study case with data obtained by the On Board Observers Program

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