Reproductive cycle and energy allocation of Octopus vulgaris in Galician waters, NE Atlantic

8 páginas, 6 figuras, 1 tabla Reproductive and energy allocation analyses were performed on 1418 common octopus (Octopus vulgaris) from the Galician creel fishery (NE Atlantic) between May 2000 and December 2005. Individuals ranged from 8 to 35 cm dorsal mantle length (DML) and 136–6303 g body weigh...

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Published in:Fisheries Research
Main Authors: Otero, Jaime, González, Ángel F., Sieiro, Pilar, Guerra, Ángel
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier 2007
Subjects:
DML
Online Access:http://hdl.handle.net/10261/53832
https://doi.org/10.1016/j.fishres.2007.01.007
id ftcsic:oai:digital.csic.es:10261/53832
record_format openpolar
spelling ftcsic:oai:digital.csic.es:10261/53832 2024-02-11T10:03:23+01:00 Reproductive cycle and energy allocation of Octopus vulgaris in Galician waters, NE Atlantic Otero, Jaime González, Ángel F. Sieiro, Pilar Guerra, Ángel 2007 http://hdl.handle.net/10261/53832 https://doi.org/10.1016/j.fishres.2007.01.007 en eng Elsevier http://dx.doi.org/10.1016/j.fishres.2007.01.007 Fisheries Research 85(1-2): 122-129 (2007) 0165-7836 http://hdl.handle.net/10261/53832 doi:10.1016/j.fishres.2007.01.007 open Octopus vulgaris Reproductive cycle Spawning Conditions Energy allocation NE Atlantic artículo http://purl.org/coar/resource_type/c_6501 2007 ftcsic https://doi.org/10.1016/j.fishres.2007.01.007 2024-01-16T09:39:39Z 8 páginas, 6 figuras, 1 tabla Reproductive and energy allocation analyses were performed on 1418 common octopus (Octopus vulgaris) from the Galician creel fishery (NE Atlantic) between May 2000 and December 2005. Individuals ranged from 8 to 35 cm dorsal mantle length (DML) and 136–6303 g body weight (BW). The length–weight relationship for whole animals was BW= 2.9(±1.1)×DML2.17(±0.04) (r = 0.86; P < 0.00001). The sex ratio only differed from 1:1 during May and September. Spawning of O. vulgaris in this area extends from December to September with a unique peak in spring months. Size-at-maturity was 1788 g for females (n = 508); and 903 g for males (n = 467). Mean (±S.D.) potential fecundity was estimated at 221,447±116,031 oocytes and mean oocyte length at 3.0±0.8 mm. The mean number of fully developed spermatophores was 182±88 with mean length of 48.8±10.6 mm. Potential fecundity was significantly correlated with length and weight in both sexes. The condition (digestive gland to body weight ratio) of females increased proportionally with maturity stage and mature individuals had higher gonad investment suggesting that energy for gonad growth was derived from the diet rather than endogenous reserves. On the other hand, mature males showed poorer condition. The general picture of the reproductive biology of this species in Galician waters is discussed taking into account the seasonal wind-driven upwelling that governs this ecosystem. This research was founded in part by the EU (CFP-99/063), CICYT (REN2002-02111/MAR and VEM2003-20010) and Xunta de Galicia (PGIDIT02-RMAC40203PR) contracts. J. Otero was supported by a fellowship of the Diputaci´on de Pontevedra and an I3P postgraduate fellowship Peer reviewed Article in Journal/Newspaper DML Digital.CSIC (Spanish National Research Council) Fisheries Research 85 1-2 122 129
institution Open Polar
collection Digital.CSIC (Spanish National Research Council)
op_collection_id ftcsic
language English
topic Octopus vulgaris
Reproductive cycle
Spawning
Conditions
Energy allocation
NE Atlantic
spellingShingle Octopus vulgaris
Reproductive cycle
Spawning
Conditions
Energy allocation
NE Atlantic
Otero, Jaime
González, Ángel F.
Sieiro, Pilar
Guerra, Ángel
Reproductive cycle and energy allocation of Octopus vulgaris in Galician waters, NE Atlantic
topic_facet Octopus vulgaris
Reproductive cycle
Spawning
Conditions
Energy allocation
NE Atlantic
description 8 páginas, 6 figuras, 1 tabla Reproductive and energy allocation analyses were performed on 1418 common octopus (Octopus vulgaris) from the Galician creel fishery (NE Atlantic) between May 2000 and December 2005. Individuals ranged from 8 to 35 cm dorsal mantle length (DML) and 136–6303 g body weight (BW). The length–weight relationship for whole animals was BW= 2.9(±1.1)×DML2.17(±0.04) (r = 0.86; P < 0.00001). The sex ratio only differed from 1:1 during May and September. Spawning of O. vulgaris in this area extends from December to September with a unique peak in spring months. Size-at-maturity was 1788 g for females (n = 508); and 903 g for males (n = 467). Mean (±S.D.) potential fecundity was estimated at 221,447±116,031 oocytes and mean oocyte length at 3.0±0.8 mm. The mean number of fully developed spermatophores was 182±88 with mean length of 48.8±10.6 mm. Potential fecundity was significantly correlated with length and weight in both sexes. The condition (digestive gland to body weight ratio) of females increased proportionally with maturity stage and mature individuals had higher gonad investment suggesting that energy for gonad growth was derived from the diet rather than endogenous reserves. On the other hand, mature males showed poorer condition. The general picture of the reproductive biology of this species in Galician waters is discussed taking into account the seasonal wind-driven upwelling that governs this ecosystem. This research was founded in part by the EU (CFP-99/063), CICYT (REN2002-02111/MAR and VEM2003-20010) and Xunta de Galicia (PGIDIT02-RMAC40203PR) contracts. J. Otero was supported by a fellowship of the Diputaci´on de Pontevedra and an I3P postgraduate fellowship Peer reviewed
format Article in Journal/Newspaper
author Otero, Jaime
González, Ángel F.
Sieiro, Pilar
Guerra, Ángel
author_facet Otero, Jaime
González, Ángel F.
Sieiro, Pilar
Guerra, Ángel
author_sort Otero, Jaime
title Reproductive cycle and energy allocation of Octopus vulgaris in Galician waters, NE Atlantic
title_short Reproductive cycle and energy allocation of Octopus vulgaris in Galician waters, NE Atlantic
title_full Reproductive cycle and energy allocation of Octopus vulgaris in Galician waters, NE Atlantic
title_fullStr Reproductive cycle and energy allocation of Octopus vulgaris in Galician waters, NE Atlantic
title_full_unstemmed Reproductive cycle and energy allocation of Octopus vulgaris in Galician waters, NE Atlantic
title_sort reproductive cycle and energy allocation of octopus vulgaris in galician waters, ne atlantic
publisher Elsevier
publishDate 2007
url http://hdl.handle.net/10261/53832
https://doi.org/10.1016/j.fishres.2007.01.007
genre DML
genre_facet DML
op_relation http://dx.doi.org/10.1016/j.fishres.2007.01.007
Fisheries Research 85(1-2): 122-129 (2007)
0165-7836
http://hdl.handle.net/10261/53832
doi:10.1016/j.fishres.2007.01.007
op_rights open
op_doi https://doi.org/10.1016/j.fishres.2007.01.007
container_title Fisheries Research
container_volume 85
container_issue 1-2
container_start_page 122
op_container_end_page 129
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