New insights into the morphology, reproduction and distribution of the large-tuberculate octopus Graneledone macrotyla from the Patagonian slope
The new information reported in this paper is based on 11 specimens of the large-tuberculate octopus Graneledone macrotyla. These specimens were caught in bottom trawl surveys ATLANTIS 2009 and 2010 carried out on the Patagonian slope off the Argentinean Economic Exclusive Zone between 24 February a...
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Centro Oceanográfico de Vigo
2012
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ftieo:oai:repositorio.ieo.es:10508/812 2023-05-15T14:15:44+02:00 New insights into the morphology, reproduction and distribution of the large-tuberculate octopus Graneledone macrotyla from the Patagonian slope Guerra, Á. (Ángel) Roura, A. (Álvaro) Sieiro, M.P. (María Pilar) Portela, J. (Julio) Río-Iglesias, J.L. (José Luis) del Antartic Ocean Atlantic Ocean South Atlantic Southwest Atlantic Patagonian Shelf 2012-08-31 http://hdl.handle.net/10508/812 eng eng Centro Oceanográfico de Vigo 0214-8358 http://hdl.handle.net/10508/812 Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ CC-BY-NC-ND Graneledone macrotyla Cephalopoda systematic reproduction biogeography Patagonian slope southwest Atlantic article 2012 ftieo 2022-08-30T23:46:44Z The new information reported in this paper is based on 11 specimens of the large-tuberculate octopus Graneledone macrotyla. These specimens were caught in bottom trawl surveys ATLANTIS 2009 and 2010 carried out on the Patagonian slope off the Argentinean Economic Exclusive Zone between 24 February and 1 April 2009 and from 9 March to 5 April 2010 respectively. A new diagnosis and a complete description of the species are provided. This is the first time that stylets, beaks and spermatophores are described. This is also the first time in which mature females have been studied and the female genitalia described. Like other eledonid octopods, G. macrotyla does not have spermathecae in the oviducal glands. The presence of fertilized eggs inside the ovary suggests that fertilization takes place within the ovary. The simultaneous occurrence of oocyte cohorts at different oogenic stages suggests that the species is a multiple spawner. G. macrotyla inhabits shallower waters on the Patagonian slope (475-921 m) than in the subantartic area (1647-2044 m). From a biogeographical point of view, our data show that G. macrotyla inhabits the plume of cold subantarctic waters, which is pushed far north into the southwestern Atlantic by the Falkland (Malvinas) Current. Nueva información sobre la morfología, reproducción y distribución del pulpo megatuberculado Graneledone macrotyla del talud continental Patagónico. – La novedosa información que se proporciona en este trabajo se basa en 11 ejemplares del pulpo megatuberculado Graneledone macrotyla. Esos ejemplares se capturaron en las campañas de prospección ATLANTIS 2009 y 2010, realizadas con arte de arrastre bentónico en el talud patagónico por fuera de la Zona Económica Exclusiva de Argentina, entre el 24 de febrero y el 1 de abril de 2009 y desde el 9 de marzo hasta el 5 de abril de 2010, respectivamente. Se ofrece una nueva diagnosis y una descripción completa de la especie. Esta es la primera vez en que se describen los estiletes, picos y espermatóforos. También es ... Article in Journal/Newspaper antartic* Instituto Español de Oceanografía: e-IEO Argentina |
institution |
Open Polar |
collection |
Instituto Español de Oceanografía: e-IEO |
op_collection_id |
ftieo |
language |
English |
topic |
Graneledone macrotyla Cephalopoda systematic reproduction biogeography Patagonian slope southwest Atlantic |
spellingShingle |
Graneledone macrotyla Cephalopoda systematic reproduction biogeography Patagonian slope southwest Atlantic Guerra, Á. (Ángel) Roura, A. (Álvaro) Sieiro, M.P. (María Pilar) Portela, J. (Julio) Río-Iglesias, J.L. (José Luis) del New insights into the morphology, reproduction and distribution of the large-tuberculate octopus Graneledone macrotyla from the Patagonian slope |
topic_facet |
Graneledone macrotyla Cephalopoda systematic reproduction biogeography Patagonian slope southwest Atlantic |
description |
The new information reported in this paper is based on 11 specimens of the large-tuberculate octopus Graneledone macrotyla. These specimens were caught in bottom trawl surveys ATLANTIS 2009 and 2010 carried out on the Patagonian slope off the Argentinean Economic Exclusive Zone between 24 February and 1 April 2009 and from 9 March to 5 April 2010 respectively. A new diagnosis and a complete description of the species are provided. This is the first time that stylets, beaks and spermatophores are described. This is also the first time in which mature females have been studied and the female genitalia described. Like other eledonid octopods, G. macrotyla does not have spermathecae in the oviducal glands. The presence of fertilized eggs inside the ovary suggests that fertilization takes place within the ovary. The simultaneous occurrence of oocyte cohorts at different oogenic stages suggests that the species is a multiple spawner. G. macrotyla inhabits shallower waters on the Patagonian slope (475-921 m) than in the subantartic area (1647-2044 m). From a biogeographical point of view, our data show that G. macrotyla inhabits the plume of cold subantarctic waters, which is pushed far north into the southwestern Atlantic by the Falkland (Malvinas) Current. Nueva información sobre la morfología, reproducción y distribución del pulpo megatuberculado Graneledone macrotyla del talud continental Patagónico. – La novedosa información que se proporciona en este trabajo se basa en 11 ejemplares del pulpo megatuberculado Graneledone macrotyla. Esos ejemplares se capturaron en las campañas de prospección ATLANTIS 2009 y 2010, realizadas con arte de arrastre bentónico en el talud patagónico por fuera de la Zona Económica Exclusiva de Argentina, entre el 24 de febrero y el 1 de abril de 2009 y desde el 9 de marzo hasta el 5 de abril de 2010, respectivamente. Se ofrece una nueva diagnosis y una descripción completa de la especie. Esta es la primera vez en que se describen los estiletes, picos y espermatóforos. También es ... |
format |
Article in Journal/Newspaper |
author |
Guerra, Á. (Ángel) Roura, A. (Álvaro) Sieiro, M.P. (María Pilar) Portela, J. (Julio) Río-Iglesias, J.L. (José Luis) del |
author_facet |
Guerra, Á. (Ángel) Roura, A. (Álvaro) Sieiro, M.P. (María Pilar) Portela, J. (Julio) Río-Iglesias, J.L. (José Luis) del |
author_sort |
Guerra, Á. (Ángel) |
title |
New insights into the morphology, reproduction and distribution of the large-tuberculate octopus Graneledone macrotyla from the Patagonian slope |
title_short |
New insights into the morphology, reproduction and distribution of the large-tuberculate octopus Graneledone macrotyla from the Patagonian slope |
title_full |
New insights into the morphology, reproduction and distribution of the large-tuberculate octopus Graneledone macrotyla from the Patagonian slope |
title_fullStr |
New insights into the morphology, reproduction and distribution of the large-tuberculate octopus Graneledone macrotyla from the Patagonian slope |
title_full_unstemmed |
New insights into the morphology, reproduction and distribution of the large-tuberculate octopus Graneledone macrotyla from the Patagonian slope |
title_sort |
new insights into the morphology, reproduction and distribution of the large-tuberculate octopus graneledone macrotyla from the patagonian slope |
publisher |
Centro Oceanográfico de Vigo |
publishDate |
2012 |
url |
http://hdl.handle.net/10508/812 |
op_coverage |
Antartic Ocean Atlantic Ocean South Atlantic Southwest Atlantic Patagonian Shelf |
geographic |
Argentina |
geographic_facet |
Argentina |
genre |
antartic* |
genre_facet |
antartic* |
op_relation |
0214-8358 http://hdl.handle.net/10508/812 |
op_rights |
Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766288040456617984 |