FN Archimer Export Format
PT J
TI Reproductive biology of Alvinocarls muricola (Decapoda : Caridea : Alvinocarididae) from cold seeps in the Congo Basin
BT 
AF RAMIREZ LLODRA, Eva
   SEGONZAC, Michel
AS 1:1;2:2;
FF 1:;2:PDG-DOP-DCB-EEP-LEP;
C1 CSIC, CMIMA, Inst Ciencias Mar, E-08003 Barcelona, Spain.
   IFREMER, Ctr Brest, Lab Environm Profond Centob, F-29280 Plouzane, France.
C2 CSIC, SPAIN
   IFREMER, FRANCE
SI BREST
SE PDG-DOP-DCB-EEP-LEP
IN WOS Ifremer jusqu'en 2018
   copubli-europe
IF 0.778
TC 19
UR https://archimer.ifremer.fr/doc/2006/publication-2317.pdf
LA English
DT Article
CR BIOZAIRE 1
   BIOZAIRE 2
   BIOZAIRE 3
BO Unknown
   Anchored Buoy
DE ;Reproduction biology;Oogenesis;Sex ratio;Population structure;Caridean shrimp
AB The caridean shrimp Alvinocaris niuricola has been observed forming high density populations over mussel beds on the giant pockmark cold seep site Regab in the Gulf of Guinea at 3150 m 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 mu m oocyte size and the developing oocytes are surrounded by a monolayer of accessory cells. The maximum oocyte size was 515 mu m. 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 0.66 x 0.55 turn, suggesting planktotrophic larvae and a potential extended larval development.
PY 2006
PD DEC
SO Journal of the Marine Biological Association of the United Kingdom
SN 0025-3154
PU Cambridge University Press
VL 86
IS 6
UT 000243940600010
BP 1347
EP 1356
DI 10.1017/S0025315406014378
ID 2317
ER

EF