Some Aspects of the Thorny Skate, Amblryraja radiata, Reproductive Biology in NAFO Division 3N (Elasmobranch Fisheries – Oral)
Thorny skate samples from August to December 2000 were examined to determine both sexes maturity stages, length at maturity and females potential fecundity. The size and number of the ovarian oocytes increase as the maturation progress. In fully mature ovaries the average number of developed eggs is...
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ftcsic:oai:digital.csic.es:10261/329139 2024-02-11T10:06:26+01:00 Some Aspects of the Thorny Skate, Amblryraja radiata, Reproductive Biology in NAFO Division 3N (Elasmobranch Fisheries – Oral) Río-Iglesias, José Luis del Atlantic Ocean North Atlantic Northwest Atlantic NAFO 2002-09 http://hdl.handle.net/10508/739 http://hdl.handle.net/10261/329139 en eng Centro Oceanográfico de Vigo Río Iglesias, J.L. del. 2002. Some Aspects of the Thorny Skate, Amblryraja radiata, Reproductive Biology in NAFO Division 3N (Elasmobranch Fisheries-Oral). NAFO Sci. Coun. Res. Doc. 02/118, Serial Nº N4739: 14p. http://hdl.handle.net/10508/739 http://hdl.handle.net/10261/329139 open Centro Oceanográfico de Vigo Pesquerías working paper 2002 ftcsic 2024-01-16T11:49:41Z Thorny skate samples from August to December 2000 were examined to determine both sexes maturity stages, length at maturity and females potential fecundity. The size and number of the ovarian oocytes increase as the maturation progress. In fully mature ovaries the average number of developed eggs is between 40 and 45 and its final mean size is 12.5 mm. The minimum number of developing eggs per female found in the ovaries was 2 and the maximum 88. Very few females at either the capsule extrusion or other of the active uterine stages have been found. On the contrary most part of the adult males were at the fully mature stages, suggesting that the samples could be taken on a mating aggregation season. Using data from 1997, 1999 and 2000, both maturity ogives have been fitted. The females length at maturity obtained ranged between 60 and 54 cm and that of the males between 43 and 51 cm. Report North Atlantic Northwest Atlantic Digital.CSIC (Spanish National Research Council) |
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Open Polar |
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Digital.CSIC (Spanish National Research Council) |
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ftcsic |
language |
English |
topic |
Centro Oceanográfico de Vigo Pesquerías |
spellingShingle |
Centro Oceanográfico de Vigo Pesquerías Río-Iglesias, José Luis del Some Aspects of the Thorny Skate, Amblryraja radiata, Reproductive Biology in NAFO Division 3N (Elasmobranch Fisheries – Oral) |
topic_facet |
Centro Oceanográfico de Vigo Pesquerías |
description |
Thorny skate samples from August to December 2000 were examined to determine both sexes maturity stages, length at maturity and females potential fecundity. The size and number of the ovarian oocytes increase as the maturation progress. In fully mature ovaries the average number of developed eggs is between 40 and 45 and its final mean size is 12.5 mm. The minimum number of developing eggs per female found in the ovaries was 2 and the maximum 88. Very few females at either the capsule extrusion or other of the active uterine stages have been found. On the contrary most part of the adult males were at the fully mature stages, suggesting that the samples could be taken on a mating aggregation season. Using data from 1997, 1999 and 2000, both maturity ogives have been fitted. The females length at maturity obtained ranged between 60 and 54 cm and that of the males between 43 and 51 cm. |
format |
Report |
author |
Río-Iglesias, José Luis del |
author_facet |
Río-Iglesias, José Luis del |
author_sort |
Río-Iglesias, José Luis del |
title |
Some Aspects of the Thorny Skate, Amblryraja radiata, Reproductive Biology in NAFO Division 3N (Elasmobranch Fisheries – Oral) |
title_short |
Some Aspects of the Thorny Skate, Amblryraja radiata, Reproductive Biology in NAFO Division 3N (Elasmobranch Fisheries – Oral) |
title_full |
Some Aspects of the Thorny Skate, Amblryraja radiata, Reproductive Biology in NAFO Division 3N (Elasmobranch Fisheries – Oral) |
title_fullStr |
Some Aspects of the Thorny Skate, Amblryraja radiata, Reproductive Biology in NAFO Division 3N (Elasmobranch Fisheries – Oral) |
title_full_unstemmed |
Some Aspects of the Thorny Skate, Amblryraja radiata, Reproductive Biology in NAFO Division 3N (Elasmobranch Fisheries – Oral) |
title_sort |
some aspects of the thorny skate, amblryraja radiata, reproductive biology in nafo division 3n (elasmobranch fisheries – oral) |
publishDate |
2002 |
url |
http://hdl.handle.net/10508/739 http://hdl.handle.net/10261/329139 |
op_coverage |
Atlantic Ocean North Atlantic Northwest Atlantic NAFO |
genre |
North Atlantic Northwest Atlantic |
genre_facet |
North Atlantic Northwest Atlantic |
op_relation |
Centro Oceanográfico de Vigo Río Iglesias, J.L. del. 2002. Some Aspects of the Thorny Skate, Amblryraja radiata, Reproductive Biology in NAFO Division 3N (Elasmobranch Fisheries-Oral). NAFO Sci. Coun. Res. Doc. 02/118, Serial Nº N4739: 14p. http://hdl.handle.net/10508/739 http://hdl.handle.net/10261/329139 |
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open |
_version_ |
1790604169974906880 |