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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| Format: | Article |
| Language: | English |
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Consejo Superior de Investigaciones Científicas
2012-06-01
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| Series: | Scientia Marina |
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| Online Access: | http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1342 |
| _version_ | 1819297149243883520 |
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| author | Ángel Guerra Álvaro Roura Maria Pilar Sieiro Julio M. Portela José Luis del Río |
| author_facet | Ángel Guerra Álvaro Roura Maria Pilar Sieiro Julio M. Portela José Luis del Río |
| author_sort | Ángel Guerra |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-24T05:09:25Z |
| format | Article |
| id | doaj.art-8f0a0b0167bf4ec39e29222a225ee26b |
| institution | Directory Open Access Journal |
| issn | 0214-8358 1886-8134 |
| language | English |
| last_indexed | 2024-12-24T05:09:25Z |
| publishDate | 2012-06-01 |
| publisher | Consejo Superior de Investigaciones Científicas |
| record_format | Article |
| series | Scientia Marina |
| spelling | doaj.art-8f0a0b0167bf4ec39e29222a225ee26b2022-12-21T17:13:44ZengConsejo Superior de Investigaciones CientíficasScientia Marina0214-83581886-81342012-06-0176231932810.3989/scimar.03473.07A1328New insights into the morphology, reproduction and distribution of the large-tuberculate octopus Graneledone macrotyla from the Patagonian slopeÁngel Guerra0Álvaro Roura1Maria Pilar Sieiro2Julio M. Portela3José Luis del Río4Instituto de Investigaciones Marinas (CSIC)Instituto de Investigaciones Marinas (CSIC)Instituto de Investigaciones Marinas (CSIC)Instituto Español de Oceanografía (IEO)Instituto Español de Oceanografía (IEO)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.http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1342graneledone macrotylacephalopodasystematicreproductionbiogeographypatagonian slopesouthwest atlantic |
| spellingShingle | Ángel Guerra Álvaro Roura Maria Pilar Sieiro Julio M. Portela José Luis del Río New insights into the morphology, reproduction and distribution of the large-tuberculate octopus Graneledone macrotyla from the Patagonian slope Scientia Marina graneledone macrotyla cephalopoda systematic reproduction biogeography patagonian slope southwest atlantic |
| title | 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_short | 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 |
| topic | graneledone macrotyla cephalopoda systematic reproduction biogeography patagonian slope southwest atlantic |
| url | http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1342 |
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