Distribution of Oikopleura dioica (Tunicata, Appendicularia) associated with a coastal frontal system (39°- 41°S) of the SW Atlantic Ocean in the spawning area of Engraulis anchoita anchovy

Among tunicates, the small planktonic appendicularians generally comprise a significant fraction of the mesozooplankton in frontal systems. The summer 2011 distribution (vertical and spatial) of Oikopleura dioica was studied in terms of abundance, biomass, estimation of egg production and population...

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Autores principales:	Spinelli, M., Guerrero, R., Pájaro, M., Capitanio, F.
Formato:	JOUR
Materias:	Engraulis anchoita Frontal systems Oikopleuridae
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_16798759_v61_n2_p141_Spinelli
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_16798759_v61_n2_p141_Spinelli
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spelling	todo:paper_16798759_v61_n2_p141_Spinelli2023-10-03T16:29:46Z Distribution of Oikopleura dioica (Tunicata, Appendicularia) associated with a coastal frontal system (39°- 41°S) of the SW Atlantic Ocean in the spawning area of Engraulis anchoita anchovy Spinelli, M. Guerrero, R. Pájaro, M. Capitanio, F. Engraulis anchoita Frontal systems Oikopleuridae Among tunicates, the small planktonic appendicularians generally comprise a significant fraction of the mesozooplankton in frontal systems. The summer 2011 distribution (vertical and spatial) of Oikopleura dioica was studied in terms of abundance, biomass, estimation of egg production and population structure in the different sectors of the El Rincón coastal front, in the light of thermal and salinity gradients. Peaks of abundance of Engraulis anchoita larvae were compared to O. dioica patterns. Samples were collected with plankton nets of 67 μm and 200 μm at two layers, below and above the thermocline depth. CTD data profiles were also recorded. During this campaign high salinity waters were predominant in the estuarine area. Conversely, a thermal stratification was found, being more marked at the external stations of the front where the highest densities and biomass of O. dioica coincided with the highest E. anchoita larvae densities. The size structure of O. dioica was also associated with the thermal gradient. The smaller sizes were found in the homogeneous area at the coast where the temperature was higher around 22°C. This front constitutes a suitable environment for O. dioica reproduction enhancing the survival rate and growth of several small pelagic fishes such as E. anchoita. Fil:Capitanio, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_16798759_v61_n2_p141_Spinelli
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Engraulis anchoita Frontal systems Oikopleuridae
spellingShingle	Engraulis anchoita Frontal systems Oikopleuridae Spinelli, M. Guerrero, R. Pájaro, M. Capitanio, F. Distribution of Oikopleura dioica (Tunicata, Appendicularia) associated with a coastal frontal system (39°- 41°S) of the SW Atlantic Ocean in the spawning area of Engraulis anchoita anchovy
topic_facet	Engraulis anchoita Frontal systems Oikopleuridae
description	Among tunicates, the small planktonic appendicularians generally comprise a significant fraction of the mesozooplankton in frontal systems. The summer 2011 distribution (vertical and spatial) of Oikopleura dioica was studied in terms of abundance, biomass, estimation of egg production and population structure in the different sectors of the El Rincón coastal front, in the light of thermal and salinity gradients. Peaks of abundance of Engraulis anchoita larvae were compared to O. dioica patterns. Samples were collected with plankton nets of 67 μm and 200 μm at two layers, below and above the thermocline depth. CTD data profiles were also recorded. During this campaign high salinity waters were predominant in the estuarine area. Conversely, a thermal stratification was found, being more marked at the external stations of the front where the highest densities and biomass of O. dioica coincided with the highest E. anchoita larvae densities. The size structure of O. dioica was also associated with the thermal gradient. The smaller sizes were found in the homogeneous area at the coast where the temperature was higher around 22°C. This front constitutes a suitable environment for O. dioica reproduction enhancing the survival rate and growth of several small pelagic fishes such as E. anchoita.
format	JOUR
author	Spinelli, M. Guerrero, R. Pájaro, M. Capitanio, F.
author_facet	Spinelli, M. Guerrero, R. Pájaro, M. Capitanio, F.
author_sort	Spinelli, M.
title	Distribution of Oikopleura dioica (Tunicata, Appendicularia) associated with a coastal frontal system (39°- 41°S) of the SW Atlantic Ocean in the spawning area of Engraulis anchoita anchovy
title_short	Distribution of Oikopleura dioica (Tunicata, Appendicularia) associated with a coastal frontal system (39°- 41°S) of the SW Atlantic Ocean in the spawning area of Engraulis anchoita anchovy
title_full	Distribution of Oikopleura dioica (Tunicata, Appendicularia) associated with a coastal frontal system (39°- 41°S) of the SW Atlantic Ocean in the spawning area of Engraulis anchoita anchovy
title_fullStr	Distribution of Oikopleura dioica (Tunicata, Appendicularia) associated with a coastal frontal system (39°- 41°S) of the SW Atlantic Ocean in the spawning area of Engraulis anchoita anchovy
title_full_unstemmed	Distribution of Oikopleura dioica (Tunicata, Appendicularia) associated with a coastal frontal system (39°- 41°S) of the SW Atlantic Ocean in the spawning area of Engraulis anchoita anchovy
title_sort	distribution of oikopleura dioica (tunicata, appendicularia) associated with a coastal frontal system (39°- 41°s) of the sw atlantic ocean in the spawning area of engraulis anchoita anchovy
url	http://hdl.handle.net/20.500.12110/paper_16798759_v61_n2_p141_Spinelli
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Distribution of Oikopleura dioica (Tunicata, Appendicularia) associated with a coastal frontal system (39°- 41°S) of the SW Atlantic Ocean in the spawning area of Engraulis anchoita anchovy

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