English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/23750
Share/Impact:
Statistics
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

The ovarian maturation cycle of the Norway lobsterNephrops norvegicus (Linnaeus, 1758) (Crustacea, Decapoda) from the western Mediterranean Sea

AuthorsRotllant, Guiomar ; Ribes, Enric; Company, Joan B. ; Durfort, Mercè
KeywordsCrustacean
Lobster
Nephrops norvegicus
Reproduction
Ovarian maturation
Ovary wall
Issue Date2005
PublisherElsevier
CitationInvertebrate Reproduction and Development, 48:1–3: 161–169 (2005)
AbstractThe Norway lobster Nephrops norvegicus lives in the continental margins of the western Mediterranean Sea at depths between 100 and 600 m. It constitutes an important fisheries resource and presents a seasonal reproductive pattern. Female Norway lobsters were obtained each month from a vessel fishing off Barcelona. One hundred females caught in June 2002 were kept in the laboratory. After spawning, ovarian samples were taken every 30 days with the objective of monitoring the first steps in ovarian maturation. The gonado-somatic index (GSI) remained low over the 6 months during which the females carried their eggs, plus for a further 2–3 months. However, this study suggests that ovarian maturation is a continuous process with two different phases, taking at least 6–8 months during which the female carries its eggs. There is an increase in oocyte numbers; the germinal zone produces oogonia; and the oocytes that develop migrate to the periphery, pushing the post-ovulatory follicles to the wall of the ovary and reinforcing it for subsequent spawning. Besides this increase in the number of oocytes, vitellogenesis begins 2–3 months after the eggs hatch. Oocytes then grow and the ovaries gain weight and change from a cream color to a blackish-green. When the GSI reached 10, spawning occurred and, from then on, the ovary is mainly composed of post-ovulatory follicles.
Description9 pages, 7 figures
URIhttp://hdl.handle.net/10261/23750
ISSN0168-8170
Appears in Collections:(ICM) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work
 


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.