Megabenthic gastropods in the outer Uruguayan continental shelf: composition, distribution and some effects of trawling

This study aims to advance knowledge on the effects of bottom trawling in the shelled megabenthic gastropods from Uruguayan continental shelf. Composition of by-catch, species distribution, direct shell damage and mortality, and frequency of repaired shell damage were analysed from data collected on...

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Autores principales:	Carranza,Alvar, Horta,Sebastián
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2008
Materias:	Sub lethal effects Adelomelon Odontocymbiola Zidona Fusitriton
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572008000100014
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spelling	oai:scielo:S0718-195720080001000142008-07-21Megabenthic gastropods in the outer Uruguayan continental shelf: composition, distribution and some effects of trawlingCarranza,AlvarHorta,Sebastián Sub lethal effects Adelomelon Odontocymbiola Zidona Fusitriton This study aims to advance knowledge on the effects of bottom trawling in the shelled megabenthic gastropods from Uruguayan continental shelf. Composition of by-catch, species distribution, direct shell damage and mortality, and frequency of repaired shell damage were analysed from data collected on board of the research vessel "Aldebaran". A total of 12 megabenthic gastropod species was registered from 35 stations surveyed, either as live specimens or empty shells. From these, the shelled gastropods Adelomelon beckii, Adelomelon ancilla, Odontocymbiola magellanica, Fusitriton magellanicus and Zidona dufresnei dominated numerically the by-catch. We observed a spatial segregation of the gastropod assemblages along a bathymetric and latitudinal gradient, with O. magellanica, F. magellanicus and A. ancilla occurring at the southern portion of the study area, whereas A. beckii and Z. dufresnei were restricted to the northern and shallower areas respectively. Direct mortality was barely observed, but shells of A. ancilla, O. magellanica and Z. dufresnei were frequently damaged during the fishing operation and capture handling. Accordingly, we found a high positive correlation between the observed frequency of recent shell damage and the presence of scars, suggestive but not conclusive evidence on the relationship between incidence of repaired shell damage and trawling disturbanceinfo:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.43 n.1 20082008-04-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572008000100014en10.4067/S0718-19572008000100014
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Sub lethal effects Adelomelon Odontocymbiola Zidona Fusitriton
spellingShingle	Sub lethal effects Adelomelon Odontocymbiola Zidona Fusitriton Carranza,Alvar Horta,Sebastián Megabenthic gastropods in the outer Uruguayan continental shelf: composition, distribution and some effects of trawling
description	This study aims to advance knowledge on the effects of bottom trawling in the shelled megabenthic gastropods from Uruguayan continental shelf. Composition of by-catch, species distribution, direct shell damage and mortality, and frequency of repaired shell damage were analysed from data collected on board of the research vessel "Aldebaran". A total of 12 megabenthic gastropod species was registered from 35 stations surveyed, either as live specimens or empty shells. From these, the shelled gastropods Adelomelon beckii, Adelomelon ancilla, Odontocymbiola magellanica, Fusitriton magellanicus and Zidona dufresnei dominated numerically the by-catch. We observed a spatial segregation of the gastropod assemblages along a bathymetric and latitudinal gradient, with O. magellanica, F. magellanicus and A. ancilla occurring at the southern portion of the study area, whereas A. beckii and Z. dufresnei were restricted to the northern and shallower areas respectively. Direct mortality was barely observed, but shells of A. ancilla, O. magellanica and Z. dufresnei were frequently damaged during the fishing operation and capture handling. Accordingly, we found a high positive correlation between the observed frequency of recent shell damage and the presence of scars, suggestive but not conclusive evidence on the relationship between incidence of repaired shell damage and trawling disturbance
author	Carranza,Alvar Horta,Sebastián
author_facet	Carranza,Alvar Horta,Sebastián
author_sort	Carranza,Alvar
title	Megabenthic gastropods in the outer Uruguayan continental shelf: composition, distribution and some effects of trawling
title_short	Megabenthic gastropods in the outer Uruguayan continental shelf: composition, distribution and some effects of trawling
title_full	Megabenthic gastropods in the outer Uruguayan continental shelf: composition, distribution and some effects of trawling
title_fullStr	Megabenthic gastropods in the outer Uruguayan continental shelf: composition, distribution and some effects of trawling
title_full_unstemmed	Megabenthic gastropods in the outer Uruguayan continental shelf: composition, distribution and some effects of trawling
title_sort	megabenthic gastropods in the outer uruguayan continental shelf: composition, distribution and some effects of trawling
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572008000100014
work_keys_str_mv	AT carranzaalvar megabenthicgastropodsintheouteruruguayancontinentalshelfcompositiondistributionandsomeeffectsoftrawling AT hortasebastian megabenthicgastropodsintheouteruruguayancontinentalshelfcompositiondistributionandsomeeffectsoftrawling
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Megabenthic gastropods in the outer Uruguayan continental shelf: composition, distribution and some effects of trawling

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