Evaluating environmental forcing on nutritional condition of Engraulis anchoita larvae in a productive area of the Southwestern Atlantic Ocean

The main goal of this study was to examine the nutritional condition of Engraulis anchoita larvae during the austral spring-summer seasons of 2010/2011 and 2012/2013 in highly productive waters in the southwestern Atlantic Ocean called El Rincón. RNA/DNA (RDs) index and derived index of Growth perfo...

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Autores principales:	Diaz, M.V., Marrari, M., Casa, V., Gattás, F., Pájaro, M., Macchi, G.J.
Formato:	JOUR
Materias:	Anchovy Engraulis anchoita Growth Nutritional condition RNA/DNA index Chlorophyll Growth (materials) RNA Chlorophyll concentration Environmental forcing Nutritional conditions Reproductive success Satellite Ocean Color Southwestern Atlantic Ocean Population statistics chlorophyll concentration (composition) DNA ecosystem dynamics environmental effect finfish growth growth response larva nutritional status ocean color reproductive success Atlantic Ocean Atlantic Ocean (Southwest) Engraulidae
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00796611_v168_n_p13_Diaz
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00796611_v168_n_p13_Diaz
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spelling	todo:paper_00796611_v168_n_p13_Diaz2023-10-03T14:54:29Z Evaluating environmental forcing on nutritional condition of Engraulis anchoita larvae in a productive area of the Southwestern Atlantic Ocean Diaz, M.V. Marrari, M. Casa, V. Gattás, F. Pájaro, M. Macchi, G.J. Anchovy Engraulis anchoita Growth Nutritional condition RNA/DNA index Chlorophyll Growth (materials) RNA Anchovy Chlorophyll concentration Engraulis anchoita Environmental forcing Nutritional conditions Reproductive success Satellite Ocean Color Southwestern Atlantic Ocean Population statistics chlorophyll concentration (composition) DNA ecosystem dynamics environmental effect finfish growth growth response larva nutritional status ocean color reproductive success RNA Atlantic Ocean Atlantic Ocean (Southwest) Engraulidae Engraulis anchoita The main goal of this study was to examine the nutritional condition of Engraulis anchoita larvae during the austral spring-summer seasons of 2010/2011 and 2012/2013 in highly productive waters in the southwestern Atlantic Ocean called El Rincón. RNA/DNA (RDs) index and derived index of Growth performance (Gpf) were used. Significant differences were observed in average RDs indices for 2010/2011 (5.27 ± 3.26) and 2012/2013 (0.81 ± 0.44). A difference in the years was also observed in Growth performance with higher values in 2010/2011 (2.45 ± 1.83) compared to 2012/2013 (−0.03 ± 0.25). Anchovy larvae captured in 2010/2011 were in good condition (Gpf > 1). During 2012/2013, extremely high larval densities were observed although Gpf values were very low indicating poor larval condition. Chlorophyll dynamics differed between sampled periods, with higher maximum values during spring 2012 as compared to 2010. Concerning chlorophyll concentrations showed a sharp decline in the values for the rest of the 2012/2013 season. We propose that the low larval growth and condition observed during 2012/2013 may have resulted from a decrease in chlorophyll concentrations together with very large larval densities which enhanced the competition for food within the larval population. Our results reinforce the idea that satellite ocean color products can be valuable tools for understanding variability in ecosystem dynamics and its effects on reproductive success in fish. © 2018 Elsevier Ltd JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00796611_v168_n_p13_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 Engraulis anchoita Growth Nutritional condition RNA/DNA index Chlorophyll Growth (materials) RNA Anchovy Chlorophyll concentration Engraulis anchoita Environmental forcing Nutritional conditions Reproductive success Satellite Ocean Color Southwestern Atlantic Ocean Population statistics chlorophyll concentration (composition) DNA ecosystem dynamics environmental effect finfish growth growth response larva nutritional status ocean color reproductive success RNA Atlantic Ocean Atlantic Ocean (Southwest) Engraulidae Engraulis anchoita
spellingShingle	Anchovy Engraulis anchoita Growth Nutritional condition RNA/DNA index Chlorophyll Growth (materials) RNA Anchovy Chlorophyll concentration Engraulis anchoita Environmental forcing Nutritional conditions Reproductive success Satellite Ocean Color Southwestern Atlantic Ocean Population statistics chlorophyll concentration (composition) DNA ecosystem dynamics environmental effect finfish growth growth response larva nutritional status ocean color reproductive success RNA Atlantic Ocean Atlantic Ocean (Southwest) Engraulidae Engraulis anchoita Diaz, M.V. Marrari, M. Casa, V. Gattás, F. Pájaro, M. Macchi, G.J. Evaluating environmental forcing on nutritional condition of Engraulis anchoita larvae in a productive area of the Southwestern Atlantic Ocean
topic_facet	Anchovy Engraulis anchoita Growth Nutritional condition RNA/DNA index Chlorophyll Growth (materials) RNA Anchovy Chlorophyll concentration Engraulis anchoita Environmental forcing Nutritional conditions Reproductive success Satellite Ocean Color Southwestern Atlantic Ocean Population statistics chlorophyll concentration (composition) DNA ecosystem dynamics environmental effect finfish growth growth response larva nutritional status ocean color reproductive success RNA Atlantic Ocean Atlantic Ocean (Southwest) Engraulidae Engraulis anchoita
description	The main goal of this study was to examine the nutritional condition of Engraulis anchoita larvae during the austral spring-summer seasons of 2010/2011 and 2012/2013 in highly productive waters in the southwestern Atlantic Ocean called El Rincón. RNA/DNA (RDs) index and derived index of Growth performance (Gpf) were used. Significant differences were observed in average RDs indices for 2010/2011 (5.27 ± 3.26) and 2012/2013 (0.81 ± 0.44). A difference in the years was also observed in Growth performance with higher values in 2010/2011 (2.45 ± 1.83) compared to 2012/2013 (−0.03 ± 0.25). Anchovy larvae captured in 2010/2011 were in good condition (Gpf > 1). During 2012/2013, extremely high larval densities were observed although Gpf values were very low indicating poor larval condition. Chlorophyll dynamics differed between sampled periods, with higher maximum values during spring 2012 as compared to 2010. Concerning chlorophyll concentrations showed a sharp decline in the values for the rest of the 2012/2013 season. We propose that the low larval growth and condition observed during 2012/2013 may have resulted from a decrease in chlorophyll concentrations together with very large larval densities which enhanced the competition for food within the larval population. Our results reinforce the idea that satellite ocean color products can be valuable tools for understanding variability in ecosystem dynamics and its effects on reproductive success in fish. © 2018 Elsevier Ltd
format	JOUR
author	Diaz, M.V. Marrari, M. Casa, V. Gattás, F. Pájaro, M. Macchi, G.J.
author_facet	Diaz, M.V. Marrari, M. Casa, V. Gattás, F. Pájaro, M. Macchi, G.J.
author_sort	Diaz, M.V.
title	Evaluating environmental forcing on nutritional condition of Engraulis anchoita larvae in a productive area of the Southwestern Atlantic Ocean
title_short	Evaluating environmental forcing on nutritional condition of Engraulis anchoita larvae in a productive area of the Southwestern Atlantic Ocean
title_full	Evaluating environmental forcing on nutritional condition of Engraulis anchoita larvae in a productive area of the Southwestern Atlantic Ocean
title_fullStr	Evaluating environmental forcing on nutritional condition of Engraulis anchoita larvae in a productive area of the Southwestern Atlantic Ocean
title_full_unstemmed	Evaluating environmental forcing on nutritional condition of Engraulis anchoita larvae in a productive area of the Southwestern Atlantic Ocean
title_sort	evaluating environmental forcing on nutritional condition of engraulis anchoita larvae in a productive area of the southwestern atlantic ocean
url	http://hdl.handle.net/20.500.12110/paper_00796611_v168_n_p13_Diaz
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Evaluating environmental forcing on nutritional condition of Engraulis anchoita larvae in a productive area of the Southwestern Atlantic Ocean

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