New evidence of brooding in the deep-sea brittle star Astrotoma agassizii Lyman, 1876 from a South Western Atlantic Canyon
The reproduction of the brittle star Astrotoma agassizii was studied from deep waters of the South Atlantic Ocean, based on samples collected in August 2012, and May and September 2013. Ten samples from 800 to 1400 m depths off Mar del Plata Canyon were studied. The species was found to be a broodin...
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ftconicet:oai:ri.conicet.gov.ar:11336/37441 2023-10-09T21:55:56+02:00 New evidence of brooding in the deep-sea brittle star Astrotoma agassizii Lyman, 1876 from a South Western Atlantic Canyon Berecoechea, Juan José Brogger, Martin Ignacio Penchaszadeh, Pablo Enrique application/pdf http://hdl.handle.net/11336/37441 eng eng Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr.2017.08.007 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0967063717301231 http://hdl.handle.net/11336/37441 Berecoechea, Juan José; Brogger, Martin Ignacio; Penchaszadeh, Pablo Enrique; New evidence of brooding in the deep-sea brittle star Astrotoma agassizii Lyman, 1876 from a South Western Atlantic Canyon; Elsevier; Deep Sea Research Part I: Oceanographic Research Papers; 127; 8-2017; 105-110 0967-0637 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ ECHINODERMATA OPHIUROIDEA REPRODUCTION DEEP-SEA BROODING https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1016/j.dsr.2017.08.007 2023-09-24T20:14:28Z The reproduction of the brittle star Astrotoma agassizii was studied from deep waters of the South Atlantic Ocean, based on samples collected in August 2012, and May and September 2013. Ten samples from 800 to 1400 m depths off Mar del Plata Canyon were studied. The species was found to be a brooding simultaneous hermaphrodite. Hermaphroditic gonads contained testis and ovaries inside the same sacs. Both, ovary and testis contained different stages of gametogenesis development simultaneously. The largest oocyte recorded was 800 µm diameter. Gonads contained several stages of oocytes in different stages of gametogenesis. Free spermatozoa were observed in the lumen of the testis, together with spermatogenic columns. Five individuals, from a total of 30 examined, resulted brooding, and most contained mature ovotestis at the same time. Incubation occurs in five of the ten bursal sacs, containing 15 to 20 young juveniles each. Maximum disc diameter recorded for a brood was 1120 µm. Herein we hypothesize that Astrotoma agassizii could be continuous breeder species in the deep-sea. Fil: Berecoechea, Juan José. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales Argentina Fil: Brogger, Martin Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Biología de Organismos Marinos; Argentina Fil: Penchaszadeh, Pablo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales Argentina Article in Journal/Newspaper South Atlantic Ocean CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Argentina Argentino Pablo ENVELOPE(-63.717,-63.717,-64.283,-64.283) Deep Sea Research Part I: Oceanographic Research Papers 127 105 110 |
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CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
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English |
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ECHINODERMATA OPHIUROIDEA REPRODUCTION DEEP-SEA BROODING https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
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ECHINODERMATA OPHIUROIDEA REPRODUCTION DEEP-SEA BROODING https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Berecoechea, Juan José Brogger, Martin Ignacio Penchaszadeh, Pablo Enrique New evidence of brooding in the deep-sea brittle star Astrotoma agassizii Lyman, 1876 from a South Western Atlantic Canyon |
topic_facet |
ECHINODERMATA OPHIUROIDEA REPRODUCTION DEEP-SEA BROODING https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
The reproduction of the brittle star Astrotoma agassizii was studied from deep waters of the South Atlantic Ocean, based on samples collected in August 2012, and May and September 2013. Ten samples from 800 to 1400 m depths off Mar del Plata Canyon were studied. The species was found to be a brooding simultaneous hermaphrodite. Hermaphroditic gonads contained testis and ovaries inside the same sacs. Both, ovary and testis contained different stages of gametogenesis development simultaneously. The largest oocyte recorded was 800 µm diameter. Gonads contained several stages of oocytes in different stages of gametogenesis. Free spermatozoa were observed in the lumen of the testis, together with spermatogenic columns. Five individuals, from a total of 30 examined, resulted brooding, and most contained mature ovotestis at the same time. Incubation occurs in five of the ten bursal sacs, containing 15 to 20 young juveniles each. Maximum disc diameter recorded for a brood was 1120 µm. Herein we hypothesize that Astrotoma agassizii could be continuous breeder species in the deep-sea. Fil: Berecoechea, Juan José. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales Argentina Fil: Brogger, Martin Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Biología de Organismos Marinos; Argentina Fil: Penchaszadeh, Pablo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales Argentina |
format |
Article in Journal/Newspaper |
author |
Berecoechea, Juan José Brogger, Martin Ignacio Penchaszadeh, Pablo Enrique |
author_facet |
Berecoechea, Juan José Brogger, Martin Ignacio Penchaszadeh, Pablo Enrique |
author_sort |
Berecoechea, Juan José |
title |
New evidence of brooding in the deep-sea brittle star Astrotoma agassizii Lyman, 1876 from a South Western Atlantic Canyon |
title_short |
New evidence of brooding in the deep-sea brittle star Astrotoma agassizii Lyman, 1876 from a South Western Atlantic Canyon |
title_full |
New evidence of brooding in the deep-sea brittle star Astrotoma agassizii Lyman, 1876 from a South Western Atlantic Canyon |
title_fullStr |
New evidence of brooding in the deep-sea brittle star Astrotoma agassizii Lyman, 1876 from a South Western Atlantic Canyon |
title_full_unstemmed |
New evidence of brooding in the deep-sea brittle star Astrotoma agassizii Lyman, 1876 from a South Western Atlantic Canyon |
title_sort |
new evidence of brooding in the deep-sea brittle star astrotoma agassizii lyman, 1876 from a south western atlantic canyon |
publisher |
Elsevier |
url |
http://hdl.handle.net/11336/37441 |
long_lat |
ENVELOPE(-63.717,-63.717,-64.283,-64.283) |
geographic |
Argentina Argentino Pablo |
geographic_facet |
Argentina Argentino Pablo |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr.2017.08.007 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0967063717301231 http://hdl.handle.net/11336/37441 Berecoechea, Juan José; Brogger, Martin Ignacio; Penchaszadeh, Pablo Enrique; New evidence of brooding in the deep-sea brittle star Astrotoma agassizii Lyman, 1876 from a South Western Atlantic Canyon; Elsevier; Deep Sea Research Part I: Oceanographic Research Papers; 127; 8-2017; 105-110 0967-0637 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1016/j.dsr.2017.08.007 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
127 |
container_start_page |
105 |
op_container_end_page |
110 |
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1779320191329501184 |