Aerobic and anaerobic enzyme activity in the hake Merluccius gayi gayi related to the Oxygen Minimum Zone off central-southern Chile

The Humboldt Current System (HCS), off the coast of Chile, has an Oxygen Minimum Zone (OMZ) between 30 and 250 m depth, with oxygen concentrations < 0.5 ml L-1. Densities of Merluccius gayi gayi associated with this zone are highest between 100 and 300 m depth, suggesting metabolic adaptations al...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Saavedra,Luisa M., Quiñones,Renato A, González,Rodrigo R
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2016
Materias:	Merluccius gayi gayi minimum oxygen zone enzymatic activity hypoxia
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572016000300009
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0718-19572016000300009
record_format	dspace
spelling	oai:scielo:S0718-195720160003000092017-01-05Aerobic and anaerobic enzyme activity in the hake Merluccius gayi gayi related to the Oxygen Minimum Zone off central-southern ChileSaavedra,Luisa M.Quiñones,Renato AGonzález,Rodrigo R Merluccius gayi gayi minimum oxygen zone enzymatic activity hypoxia The Humboldt Current System (HCS), off the coast of Chile, has an Oxygen Minimum Zone (OMZ) between 30 and 250 m depth, with oxygen concentrations < 0.5 ml L-1. Densities of Merluccius gayi gayi associated with this zone are highest between 100 and 300 m depth, suggesting metabolic adaptations allowing it to remain in the OMZ. The aerobic and anaerobic potential of this demersal fish was estimated through the measurement of key metabolic enzymes and the electron transport system (ETS) of different body tissues (white muscle, heart, brain and liver). The activities of the citrate synthase (CS) enzyme and the ETS were higher in the brain and lower in muscle, confirming the predominance of aerobic metabolism in vital organs, different of muscle. The typical activity of the anaerobic enzyme lactate dehydrogenase (LDH) fluctuated between 55 ± 17.5 and 263 ± 79 UI g-1 wet weight, with lower activities in heart and brain. The low LDH activity and high MDH/LDH ratio found in these vital organs indicate that they are able to cope with metabolic acidification during long periods of environmental hypoxia. Exceptionally high LDH activity was found in the liver which may be related to environmental factors such as pollution. Considering the low MDH/LDH ratio of muscle, the decreased activity of CS and ETS in this tissue and the high LDH activity in the liver may indicate metabolic profile of M. gayi gayi in order to tolerate hypoxia, and therefore the capability to stay in the OMZ by decreasing its swimming activity.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.51 n.3 20162016-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572016000300009en10.4067/S0718-19572016000300009
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Merluccius gayi gayi minimum oxygen zone enzymatic activity hypoxia
spellingShingle	Merluccius gayi gayi minimum oxygen zone enzymatic activity hypoxia Saavedra,Luisa M. Quiñones,Renato A González,Rodrigo R Aerobic and anaerobic enzyme activity in the hake Merluccius gayi gayi related to the Oxygen Minimum Zone off central-southern Chile
description	The Humboldt Current System (HCS), off the coast of Chile, has an Oxygen Minimum Zone (OMZ) between 30 and 250 m depth, with oxygen concentrations < 0.5 ml L-1. Densities of Merluccius gayi gayi associated with this zone are highest between 100 and 300 m depth, suggesting metabolic adaptations allowing it to remain in the OMZ. The aerobic and anaerobic potential of this demersal fish was estimated through the measurement of key metabolic enzymes and the electron transport system (ETS) of different body tissues (white muscle, heart, brain and liver). The activities of the citrate synthase (CS) enzyme and the ETS were higher in the brain and lower in muscle, confirming the predominance of aerobic metabolism in vital organs, different of muscle. The typical activity of the anaerobic enzyme lactate dehydrogenase (LDH) fluctuated between 55 ± 17.5 and 263 ± 79 UI g-1 wet weight, with lower activities in heart and brain. The low LDH activity and high MDH/LDH ratio found in these vital organs indicate that they are able to cope with metabolic acidification during long periods of environmental hypoxia. Exceptionally high LDH activity was found in the liver which may be related to environmental factors such as pollution. Considering the low MDH/LDH ratio of muscle, the decreased activity of CS and ETS in this tissue and the high LDH activity in the liver may indicate metabolic profile of M. gayi gayi in order to tolerate hypoxia, and therefore the capability to stay in the OMZ by decreasing its swimming activity.
author	Saavedra,Luisa M. Quiñones,Renato A González,Rodrigo R
author_facet	Saavedra,Luisa M. Quiñones,Renato A González,Rodrigo R
author_sort	Saavedra,Luisa M.
title	Aerobic and anaerobic enzyme activity in the hake Merluccius gayi gayi related to the Oxygen Minimum Zone off central-southern Chile
title_short	Aerobic and anaerobic enzyme activity in the hake Merluccius gayi gayi related to the Oxygen Minimum Zone off central-southern Chile
title_full	Aerobic and anaerobic enzyme activity in the hake Merluccius gayi gayi related to the Oxygen Minimum Zone off central-southern Chile
title_fullStr	Aerobic and anaerobic enzyme activity in the hake Merluccius gayi gayi related to the Oxygen Minimum Zone off central-southern Chile
title_full_unstemmed	Aerobic and anaerobic enzyme activity in the hake Merluccius gayi gayi related to the Oxygen Minimum Zone off central-southern Chile
title_sort	aerobic and anaerobic enzyme activity in the hake merluccius gayi gayi related to the oxygen minimum zone off central-southern chile
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572016000300009
work_keys_str_mv	AT saavedraluisam aerobicandanaerobicenzymeactivityinthehakemerlucciusgayigayirelatedtotheoxygenminimumzoneoffcentralsouthernchile AT quinonesrenatoa aerobicandanaerobicenzymeactivityinthehakemerlucciusgayigayirelatedtotheoxygenminimumzoneoffcentralsouthernchile AT gonzalezrodrigor aerobicandanaerobicenzymeactivityinthehakemerlucciusgayigayirelatedtotheoxygenminimumzoneoffcentralsouthernchile
_version_	1714202363483389952

Aerobic and anaerobic enzyme activity in the hake Merluccius gayi gayi related to the Oxygen Minimum Zone off central-southern Chile

Ejemplares similares