Population structure and maturity stages of Fritillaria borealis (Appendicularia, Tunicata): seasonal cycle in Ushuaia Bay (Beagle Channel)
AbstractFritillaria borealis is a cosmopolitan species, very frequent in sub-antarctic and antarctic waters. The objective of this paper was to analyze its size structure and maturity stages at two sites in Ushuaia Bay: a coastal site exposed to anthropogenic pressure (E1) and a reference site (E2)...
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ftdatacite:10.6084/m9.figshare.14325525.v1 2023-05-15T14:02:06+02:00 Population structure and maturity stages of Fritillaria borealis (Appendicularia, Tunicata): seasonal cycle in Ushuaia Bay (Beagle Channel) Presta, María Laura Hoffmeyer, Mónica Susana Capitanio, Fabiana Lia 2021 https://dx.doi.org/10.6084/m9.figshare.14325525.v1 https://scielo.figshare.com/articles/dataset/Population_structure_and_maturity_stages_of_Fritillaria_borealis_Appendicularia_Tunicata_seasonal_cycle_in_Ushuaia_Bay_Beagle_Channel_/14325525/1 unknown SciELO journals https://dx.doi.org/10.1590/s1679-87592015087206303 https://dx.doi.org/10.6084/m9.figshare.14325525 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Oceanography FOS Earth and related environmental sciences Marine Biology dataset Dataset 2021 ftdatacite https://doi.org/10.6084/m9.figshare.14325525.v1 https://doi.org/10.1590/s1679-87592015087206303 https://doi.org/10.6084/m9.figshare.14325525 2021-11-05T12:55:41Z AbstractFritillaria borealis is a cosmopolitan species, very frequent in sub-antarctic and antarctic waters. The objective of this paper was to analyze its size structure and maturity stages at two sites in Ushuaia Bay: a coastal site exposed to anthropogenic pressure (E1) and a reference site (E2) located in the external zone of the bay. Zooplankton was collected during the 2012 seasonal cycle. The sampling method involved the use of a 67 µm-mesh net. Appendicularians were classified in four maturity stages: I) undifferentiated gonads, II) testis and ovary differentiated, III) expanded testis, IV) discharged testis, expanded ovary. Our results showed that the highest densities of F. borealisoccurred in spring and summer at both sites; coinciding with high values of chlorophyll-a. The percentage of juveniles (I and II) exhibited a spatial and temporal pattern similar to that observed for chlorophyll-a values. During spring-summer, juveniles and mature specimens (III and IV) showed a greater gonadal development than those individuals found in autumn-winter. In conclusion, the mismatching in the population structure and the pattern of densities of F. borealis between coastal and external zones would suggest the existence of two sub-populations susceptible to the influence of the anthropogenic impact in the bay. Dataset Antarc* Antarctic DataCite Metadata Store (German National Library of Science and Technology) Antarctic Ushuaia ENVELOPE(-40.000,-40.000,-82.167,-82.167) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Oceanography FOS Earth and related environmental sciences Marine Biology |
spellingShingle |
Oceanography FOS Earth and related environmental sciences Marine Biology Presta, María Laura Hoffmeyer, Mónica Susana Capitanio, Fabiana Lia Population structure and maturity stages of Fritillaria borealis (Appendicularia, Tunicata): seasonal cycle in Ushuaia Bay (Beagle Channel) |
topic_facet |
Oceanography FOS Earth and related environmental sciences Marine Biology |
description |
AbstractFritillaria borealis is a cosmopolitan species, very frequent in sub-antarctic and antarctic waters. The objective of this paper was to analyze its size structure and maturity stages at two sites in Ushuaia Bay: a coastal site exposed to anthropogenic pressure (E1) and a reference site (E2) located in the external zone of the bay. Zooplankton was collected during the 2012 seasonal cycle. The sampling method involved the use of a 67 µm-mesh net. Appendicularians were classified in four maturity stages: I) undifferentiated gonads, II) testis and ovary differentiated, III) expanded testis, IV) discharged testis, expanded ovary. Our results showed that the highest densities of F. borealisoccurred in spring and summer at both sites; coinciding with high values of chlorophyll-a. The percentage of juveniles (I and II) exhibited a spatial and temporal pattern similar to that observed for chlorophyll-a values. During spring-summer, juveniles and mature specimens (III and IV) showed a greater gonadal development than those individuals found in autumn-winter. In conclusion, the mismatching in the population structure and the pattern of densities of F. borealis between coastal and external zones would suggest the existence of two sub-populations susceptible to the influence of the anthropogenic impact in the bay. |
format |
Dataset |
author |
Presta, María Laura Hoffmeyer, Mónica Susana Capitanio, Fabiana Lia |
author_facet |
Presta, María Laura Hoffmeyer, Mónica Susana Capitanio, Fabiana Lia |
author_sort |
Presta, María Laura |
title |
Population structure and maturity stages of Fritillaria borealis (Appendicularia, Tunicata): seasonal cycle in Ushuaia Bay (Beagle Channel) |
title_short |
Population structure and maturity stages of Fritillaria borealis (Appendicularia, Tunicata): seasonal cycle in Ushuaia Bay (Beagle Channel) |
title_full |
Population structure and maturity stages of Fritillaria borealis (Appendicularia, Tunicata): seasonal cycle in Ushuaia Bay (Beagle Channel) |
title_fullStr |
Population structure and maturity stages of Fritillaria borealis (Appendicularia, Tunicata): seasonal cycle in Ushuaia Bay (Beagle Channel) |
title_full_unstemmed |
Population structure and maturity stages of Fritillaria borealis (Appendicularia, Tunicata): seasonal cycle in Ushuaia Bay (Beagle Channel) |
title_sort |
population structure and maturity stages of fritillaria borealis (appendicularia, tunicata): seasonal cycle in ushuaia bay (beagle channel) |
publisher |
SciELO journals |
publishDate |
2021 |
url |
https://dx.doi.org/10.6084/m9.figshare.14325525.v1 https://scielo.figshare.com/articles/dataset/Population_structure_and_maturity_stages_of_Fritillaria_borealis_Appendicularia_Tunicata_seasonal_cycle_in_Ushuaia_Bay_Beagle_Channel_/14325525/1 |
long_lat |
ENVELOPE(-40.000,-40.000,-82.167,-82.167) |
geographic |
Antarctic Ushuaia |
geographic_facet |
Antarctic Ushuaia |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://dx.doi.org/10.1590/s1679-87592015087206303 https://dx.doi.org/10.6084/m9.figshare.14325525 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.14325525.v1 https://doi.org/10.1590/s1679-87592015087206303 https://doi.org/10.6084/m9.figshare.14325525 |
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1766272193988132864 |