English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/21922
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

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

AutorRamírez-Llodra, Eva ; Segonzac, Michel
Fecha de publicacióndic-2006
EditorCambridge University Press
CitaciónJournal of the Marine Biological Association of the UK 86(6): 1347-1356 (2006)
ResumenThe 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
Descripción10 pages, 6 figures, 2 tables
Versión del editorhttp://dx.doi.org/10.1017/S0025315406014378
Aparece en las colecciones: (ICM) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
S0025315406014378a.pdf558,64 kBAdobe PDFVista previa
Mostrar el registro completo

Artículos relacionados:

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.