Please use this identifier to cite or link to this item:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE

Reproductive biology of Alvinocaris muricola (Decapoda: Caridea: Alvinocarididae) from cold seep in the Congo Basin

AuthorsRamírez-Llodra, Eva CSIC ORCID; Segonzac, Michel
Issue DateDec-2006
PublisherCambridge University Press
CitationJournal of the Marine Biological Association of the UK 86(6): 1347-1356 (2006)
AbstractThe caridean shrimp Alvinocaris muricola has been observed forming high density populations over mussel beds on the giant pockmark cold seep site Regab in the Gulf of Guinea at 3150m depth. Samples were collected using the ROV Victor 6000, a beam trawl and a TV grab from two sites. The specimens were sexed and measured for population structure analysis. In one sample the sex ratio was 1:1, but the other sample had a sex ratio significantly biased towards females. The maximum size of females is larger than males. A sub-sample was used for gametogenesis and fecundity analysis. The oogenesis and spermatogenesis of A. muricola is characteristic of caridean shrimps. The oogonia proliferate from the germinal epithelium and develop into previtellogenic oocytes that migrate to the growth zone. Vitellogenesis starts at 80-100 μm oocyte size and the developing oocytes are surrounded by a monolayer of accessory cells.The maximum oocyte size was 515 μm. There was no evidence of synchrony in oocyte development, with all oocyte stages present in all ovaries analysed. However, seasonal sampling would be necessary to confirm the lack of seasonality in reproduction. In males, the sperm develops in sperm sacs in the testis. As in all caridean shrimp, the broods of A. muricola are held on the pleopods P11 to P14. Total fecundity was related to female size and ranged between 1432 and 5798 embryos. Within a brood all embryos are at the same stage of development, but three different stages were identified in different females, with no clear seasonal trend. The embryos were small, with mean dimensions of 0.66x0.55 mm, suggesting planktotrophic larvae and a potential extended larval development
Description10 pages, 6 figures, 2 tables
Publisher version (URL)
Appears in Collections:(ICM) Artículos

Files in This Item:
File Description SizeFormat
Ramirez_et_al_2006.pdf558,64 kBAdobe PDFThumbnail
Show full item record
Review this work


checked on May 18, 2022


checked on May 16, 2022

Page view(s)

checked on May 22, 2022


checked on May 22, 2022

Google ScholarTM




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