Mesoscale distribution and population structure of the chaetognath Serratosagitta tasmanica (Thomson, 1947) from Southwestern Atlantic Ocean

Although Serratosagitta tasmanica is widely distributed, there is little information on how hydrology affects its distribution, abundance and demography. In this study we analyzed the distribution, carbon content and population structure of S. tasmanica in the Southwestern Atlantic Ocean. Samples we...

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Autores principales: Sotelo, I., Thompson, G., Sabatini, M., Reta, R., Daponte, M.C.
Formato: JOUR
Materias:
Argentine Continental Shelf
Chaetognatha
maturity stages
population structure
Southwestern Atlantic Ocean
Tone Falkenhaug
Serratosagitta tasmanica
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_17451000_v14_n9-10_p945_Sotelo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_17451000_v14_n9-10_p945_Sotelo2023-10-03T16:31:53Z Mesoscale distribution and population structure of the chaetognath Serratosagitta tasmanica (Thomson, 1947) from Southwestern Atlantic Ocean Sotelo, I. Thompson, G. Sabatini, M. Reta, R. Daponte, M.C. Argentine Continental Shelf Chaetognatha maturity stages population structure Southwestern Atlantic Ocean Tone Falkenhaug Chaetognatha Serratosagitta tasmanica Although Serratosagitta tasmanica is widely distributed, there is little information on how hydrology affects its distribution, abundance and demography. In this study we analyzed the distribution, carbon content and population structure of S. tasmanica in the Southwestern Atlantic Ocean. Samples were collected at 34°–39°S (Northern Argentine Continental Shelf in winters of 1999 and 2000) and at 47°–55°S (Southern Argentine Continental Shelf in spring 2005, summer 2006 and winter 2006). The analysis of more than 8500 individuals showed that its dominance decreased spatially from south to north, whereas biomass (mgC/m 2 ) increased temporally by three orders of magnitude between spring (4.06) and summer (12.7). In the southern area the presence of all maturity stages in all seasons suggests year-round reproduction, with maximum reproductive activity in winter. Body length increased with increasing latitude and decreased with temperature. We detected differences in the morphology of seminal vesicles and ovary length between mature specimens. In the northern area all individuals exhibited short-type ovaries whereas in the southern area individuals had either short or long ovaries, suggesting that some individuals of the latter area had been advected from the Southern Pacific Ocean through the water discharged from the Magellan Strait. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_17451000_v14_n9-10_p945_Sotelo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Argentine Continental Shelf
Chaetognatha
maturity stages
population structure
Southwestern Atlantic Ocean
Tone Falkenhaug
Chaetognatha
Serratosagitta tasmanica
spellingShingle Argentine Continental Shelf
Chaetognatha
maturity stages
population structure
Southwestern Atlantic Ocean
Tone Falkenhaug
Chaetognatha
Serratosagitta tasmanica
Sotelo, I.
Thompson, G.
Sabatini, M.
Reta, R.
Daponte, M.C.
Mesoscale distribution and population structure of the chaetognath Serratosagitta tasmanica (Thomson, 1947) from Southwestern Atlantic Ocean
topic_facet Argentine Continental Shelf
Chaetognatha
maturity stages
population structure
Southwestern Atlantic Ocean
Tone Falkenhaug
Chaetognatha
Serratosagitta tasmanica
description Although Serratosagitta tasmanica is widely distributed, there is little information on how hydrology affects its distribution, abundance and demography. In this study we analyzed the distribution, carbon content and population structure of S. tasmanica in the Southwestern Atlantic Ocean. Samples were collected at 34°–39°S (Northern Argentine Continental Shelf in winters of 1999 and 2000) and at 47°–55°S (Southern Argentine Continental Shelf in spring 2005, summer 2006 and winter 2006). The analysis of more than 8500 individuals showed that its dominance decreased spatially from south to north, whereas biomass (mgC/m 2 ) increased temporally by three orders of magnitude between spring (4.06) and summer (12.7). In the southern area the presence of all maturity stages in all seasons suggests year-round reproduction, with maximum reproductive activity in winter. Body length increased with increasing latitude and decreased with temperature. We detected differences in the morphology of seminal vesicles and ovary length between mature specimens. In the northern area all individuals exhibited short-type ovaries whereas in the southern area individuals had either short or long ovaries, suggesting that some individuals of the latter area had been advected from the Southern Pacific Ocean through the water discharged from the Magellan Strait. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.
format JOUR
author Sotelo, I.
Thompson, G.
Sabatini, M.
Reta, R.
Daponte, M.C.
author_facet Sotelo, I.
Thompson, G.
Sabatini, M.
Reta, R.
Daponte, M.C.
author_sort Sotelo, I.
title Mesoscale distribution and population structure of the chaetognath Serratosagitta tasmanica (Thomson, 1947) from Southwestern Atlantic Ocean
title_short Mesoscale distribution and population structure of the chaetognath Serratosagitta tasmanica (Thomson, 1947) from Southwestern Atlantic Ocean
title_full Mesoscale distribution and population structure of the chaetognath Serratosagitta tasmanica (Thomson, 1947) from Southwestern Atlantic Ocean
title_fullStr Mesoscale distribution and population structure of the chaetognath Serratosagitta tasmanica (Thomson, 1947) from Southwestern Atlantic Ocean
title_full_unstemmed Mesoscale distribution and population structure of the chaetognath Serratosagitta tasmanica (Thomson, 1947) from Southwestern Atlantic Ocean
title_sort mesoscale distribution and population structure of the chaetognath serratosagitta tasmanica (thomson, 1947) from southwestern atlantic ocean
url http://hdl.handle.net/20.500.12110/paper_17451000_v14_n9-10_p945_Sotelo
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AT thompsong mesoscaledistributionandpopulationstructureofthechaetognathserratosagittatasmanicathomson1947fromsouthwesternatlanticocean
AT sabatinim mesoscaledistributionandpopulationstructureofthechaetognathserratosagittatasmanicathomson1947fromsouthwesternatlanticocean
AT retar mesoscaledistributionandpopulationstructureofthechaetognathserratosagittatasmanicathomson1947fromsouthwesternatlanticocean
AT dapontemc mesoscaledistributionandpopulationstructureofthechaetognathserratosagittatasmanicathomson1947fromsouthwesternatlanticocean
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