Effect of hook size and seasonality on the artisanal long-line fishery of southern hake (Merluccius australis Hutton, 1872) in Chile

The effect of hook size and seasonality on the artisanal long-line fishery of southern hake (Merluccius australis) in Chile was studied. We analyzed the effect of four hook sizes on the size-at-catch and catch rates of southern hake (Merluccius australis) caught with mixed long-lines between Seno de...

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Autores principales:	Queirolo,Dante, Ahumada,Mauricio
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2009
Materias:	Selectivity fishing gear artisanal fishery catch rates Southeast Pacific Ocean
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572009000300003
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spelling	oai:scielo:S0718-195720090003000032010-03-31Effect of hook size and seasonality on the artisanal long-line fishery of southern hake (Merluccius australis Hutton, 1872) in ChileQueirolo,DanteAhumada,Mauricio Selectivity fishing gear artisanal fishery catch rates Southeast Pacific Ocean The effect of hook size and seasonality on the artisanal long-line fishery of southern hake (Merluccius australis) in Chile was studied. We analyzed the effect of four hook sizes on the size-at-catch and catch rates of southern hake (Merluccius australis) caught with mixed long-lines between Seno de Reloncaví and Golfo de Ancud (41º42'S-42º48'S). Sixty fishing hauls were done in four periods (March, May, July, September); a total of 59,294 hooks were set and 14,358 specimens (26,165 kg) were caught. The analysis showed overlapping retention sizes for each hook size in the months studied, indicating no significant effects in either catch size composition or in catch rates between hooks of different size. Nevertheless, significant differences were observed between periods in the catch rates, fluctuating between 31.75 and 16.17 individuals per 100 hooks from March to September. The above results suggest that it is necessary to analyze alternative fishing gear and management measures for the fishery.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.44 n.3 20092009-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572009000300003en10.4067/S0718-19572009000300003
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Selectivity fishing gear artisanal fishery catch rates Southeast Pacific Ocean
spellingShingle	Selectivity fishing gear artisanal fishery catch rates Southeast Pacific Ocean Queirolo,Dante Ahumada,Mauricio Effect of hook size and seasonality on the artisanal long-line fishery of southern hake (Merluccius australis Hutton, 1872) in Chile
description	The effect of hook size and seasonality on the artisanal long-line fishery of southern hake (Merluccius australis) in Chile was studied. We analyzed the effect of four hook sizes on the size-at-catch and catch rates of southern hake (Merluccius australis) caught with mixed long-lines between Seno de Reloncaví and Golfo de Ancud (41º42'S-42º48'S). Sixty fishing hauls were done in four periods (March, May, July, September); a total of 59,294 hooks were set and 14,358 specimens (26,165 kg) were caught. The analysis showed overlapping retention sizes for each hook size in the months studied, indicating no significant effects in either catch size composition or in catch rates between hooks of different size. Nevertheless, significant differences were observed between periods in the catch rates, fluctuating between 31.75 and 16.17 individuals per 100 hooks from March to September. The above results suggest that it is necessary to analyze alternative fishing gear and management measures for the fishery.
author	Queirolo,Dante Ahumada,Mauricio
author_facet	Queirolo,Dante Ahumada,Mauricio
author_sort	Queirolo,Dante
title	Effect of hook size and seasonality on the artisanal long-line fishery of southern hake (Merluccius australis Hutton, 1872) in Chile
title_short	Effect of hook size and seasonality on the artisanal long-line fishery of southern hake (Merluccius australis Hutton, 1872) in Chile
title_full	Effect of hook size and seasonality on the artisanal long-line fishery of southern hake (Merluccius australis Hutton, 1872) in Chile
title_fullStr	Effect of hook size and seasonality on the artisanal long-line fishery of southern hake (Merluccius australis Hutton, 1872) in Chile
title_full_unstemmed	Effect of hook size and seasonality on the artisanal long-line fishery of southern hake (Merluccius australis Hutton, 1872) in Chile
title_sort	effect of hook size and seasonality on the artisanal long-line fishery of southern hake (merluccius australis hutton, 1872) in chile
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2009
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572009000300003
work_keys_str_mv	AT queirolodante effectofhooksizeandseasonalityontheartisanallonglinefisheryofsouthernhakemerlucciusaustralishutton1872inchile AT ahumadamauricio effectofhooksizeandseasonalityontheartisanallonglinefisheryofsouthernhakemerlucciusaustralishutton1872inchile
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Effect of hook size and seasonality on the artisanal long-line fishery of southern hake (Merluccius australis Hutton, 1872) in Chile

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