Eat or be eaten: Factors that determine nutritional condition of engraulis anchoita larvae from patagonian population of the species

Mostrar todas las versiones(4)

The Patagonian population of Engraulis anchoita inhabits the coastal sector comprised between 42° and 46° S. Its spawning and rearing areas are associated with the tidal frontal system of Peninsula Valdés, which forms in late spring and breaks during early autumn. Oceanographic frontal conditions ca...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Diaz, Marina Vera, Saraceno, Martin, Capitanio, Fabiana Lía
Publicado: 2016
Materias:
Anchovy larvae
Peninsula Valdés frontal system
RNA/DNA ratio
abundance
biomass
chlorophyll
clupeoid
crustacean
frontal feature
jellyfish
larva
primary production
RNA-DNA ratio
seasonal variation
zooplankton
Argentina
Chubut
Patagonia
Valdes Peninsula
Engraulidae
Engraulis anchoita
Nica
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03275477_v26_n2_p120_Diaz
http://hdl.handle.net/20.500.12110/paper_03275477_v26_n2_p120_Diaz
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_03275477_v26_n2_p120_Diaz
record_format dspace
spelling paper:paper_03275477_v26_n2_p120_Diaz2023-06-08T15:33:22Z Eat or be eaten: Factors that determine nutritional condition of engraulis anchoita larvae from patagonian population of the species Diaz, Marina Vera Saraceno, Martin Capitanio, Fabiana Lía Anchovy larvae Peninsula Valdés frontal system RNA/DNA ratio abundance biomass chlorophyll clupeoid crustacean frontal feature jellyfish larva primary production RNA-DNA ratio seasonal variation zooplankton Argentina Chubut Patagonia Valdes Peninsula Engraulidae Engraulis anchoita Nica The Patagonian population of Engraulis anchoita inhabits the coastal sector comprised between 42° and 46° S. Its spawning and rearing areas are associated with the tidal frontal system of Peninsula Valdés, which forms in late spring and breaks during early autumn. Oceanographic frontal conditions can enhance primary production and zooplankton biomass, representing an enriched food source for fish larvae. Larval nutritional condition was estimated using three indices: Fulton’s Condition Index, RNA/DNA ratio and growth performance. Two oceanographic sections were compared, one in which the presence of the frontal system was observed and another devoid of such effect. Condition indices reflected an enhanced nutritional condition of anchovy larvae in the section where the front persisted. Generalized linear models were applied to determine the effect of environmental variables on larval condition. RNA/DNA ratio was considered as the dependent variable, whereas surface chlorophyll concentration, copepod nauplii abundance, jellyfish volume and larval standard length were used as predictors. In general, the nutritional condition improved with the abundance of copepod nauplii, potential food source for the anchovy larvae. In contrast, the RNA/DNA ratio decreased with the increase of jellyfish abundance, suggesting that, in the study area, these organisms might act as competitors of anchovy larvae. © 2016, Asociacion Argentina de Ecologia. All Rights Reserved. Fil:Diaz, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Saraceno, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Capitanio, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03275477_v26_n2_p120_Diaz http://hdl.handle.net/20.500.12110/paper_03275477_v26_n2_p120_Diaz
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Anchovy larvae
Peninsula Valdés frontal system
RNA/DNA ratio
abundance
biomass
chlorophyll
clupeoid
crustacean
frontal feature
jellyfish
larva
primary production
RNA-DNA ratio
seasonal variation
zooplankton
Argentina
Chubut
Patagonia
Valdes Peninsula
Engraulidae
Engraulis anchoita
Nica
spellingShingle Anchovy larvae
Peninsula Valdés frontal system
RNA/DNA ratio
abundance
biomass
chlorophyll
clupeoid
crustacean
frontal feature
jellyfish
larva
primary production
RNA-DNA ratio
seasonal variation
zooplankton
Argentina
Chubut
Patagonia
Valdes Peninsula
Engraulidae
Engraulis anchoita
Nica
Diaz, Marina Vera
Saraceno, Martin
Capitanio, Fabiana Lía
Eat or be eaten: Factors that determine nutritional condition of engraulis anchoita larvae from patagonian population of the species
topic_facet Anchovy larvae
Peninsula Valdés frontal system
RNA/DNA ratio
abundance
biomass
chlorophyll
clupeoid
crustacean
frontal feature
jellyfish
larva
primary production
RNA-DNA ratio
seasonal variation
zooplankton
Argentina
Chubut
Patagonia
Valdes Peninsula
Engraulidae
Engraulis anchoita
Nica
description The Patagonian population of Engraulis anchoita inhabits the coastal sector comprised between 42° and 46° S. Its spawning and rearing areas are associated with the tidal frontal system of Peninsula Valdés, which forms in late spring and breaks during early autumn. Oceanographic frontal conditions can enhance primary production and zooplankton biomass, representing an enriched food source for fish larvae. Larval nutritional condition was estimated using three indices: Fulton’s Condition Index, RNA/DNA ratio and growth performance. Two oceanographic sections were compared, one in which the presence of the frontal system was observed and another devoid of such effect. Condition indices reflected an enhanced nutritional condition of anchovy larvae in the section where the front persisted. Generalized linear models were applied to determine the effect of environmental variables on larval condition. RNA/DNA ratio was considered as the dependent variable, whereas surface chlorophyll concentration, copepod nauplii abundance, jellyfish volume and larval standard length were used as predictors. In general, the nutritional condition improved with the abundance of copepod nauplii, potential food source for the anchovy larvae. In contrast, the RNA/DNA ratio decreased with the increase of jellyfish abundance, suggesting that, in the study area, these organisms might act as competitors of anchovy larvae. © 2016, Asociacion Argentina de Ecologia. All Rights Reserved.
author Diaz, Marina Vera
Saraceno, Martin
Capitanio, Fabiana Lía
author_facet Diaz, Marina Vera
Saraceno, Martin
Capitanio, Fabiana Lía
author_sort Diaz, Marina Vera
title Eat or be eaten: Factors that determine nutritional condition of engraulis anchoita larvae from patagonian population of the species
title_short Eat or be eaten: Factors that determine nutritional condition of engraulis anchoita larvae from patagonian population of the species
title_full Eat or be eaten: Factors that determine nutritional condition of engraulis anchoita larvae from patagonian population of the species
title_fullStr Eat or be eaten: Factors that determine nutritional condition of engraulis anchoita larvae from patagonian population of the species
title_full_unstemmed Eat or be eaten: Factors that determine nutritional condition of engraulis anchoita larvae from patagonian population of the species
title_sort eat or be eaten: factors that determine nutritional condition of engraulis anchoita larvae from patagonian population of the species
publishDate 2016
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03275477_v26_n2_p120_Diaz
http://hdl.handle.net/20.500.12110/paper_03275477_v26_n2_p120_Diaz
work_keys_str_mv AT diazmarinavera eatorbeeatenfactorsthatdeterminenutritionalconditionofengraulisanchoitalarvaefrompatagonianpopulationofthespecies
AT saracenomartin eatorbeeatenfactorsthatdeterminenutritionalconditionofengraulisanchoitalarvaefrompatagonianpopulationofthespecies
AT capitaniofabianalia eatorbeeatenfactorsthatdeterminenutritionalconditionofengraulisanchoitalarvaefrompatagonianpopulationofthespecies
_version_ 1768546021322784768

Ejemplares similares