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Aspects of the reproductive strategy of bivalves from reducing-ecosystem
Le Pennec, M.; Beninger, P.G. (1997). Aspects of the reproductive strategy of bivalves from reducing-ecosystem, in: Biologie des sources hydrothermales profondes = Biology of deep-sea hydrothermal vents: Journées d'échanges du Programme DORSALES = DORSALES Workshop Roscoff 6-8 octobre 1997. Cahiers de Biologie Marine, 38(2): pp. 132-133
In: (1997). Biologie des sources hydrothermales profondes = Biology of deep-sea hydrothermal vents: Journées d'échanges du Programme DORSALES = DORSALES Workshop Roscoff 6-8 octobre 1997. Cahiers de Biologie Marine, 38(2)[s.n.][s.l.]. 111-149 pp., more
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Le Pennec, M.
  • Beninger, P.G.

Abstract
    Progress is slowly being made in the understanding of the reproductive biology of reducing-ecosystem bivalves, particularly deep-sea vents and cold seeps. Both continuous and discontinuous reproductive cycles have been reported for these organisms, sometimes within the same genus. In general, reserve tissues are either absent or poorly- developed; an exception is the vent system Mytilidae, which presents an inter-acinal tissue containing large, vacuolized adipo-granular cells which are rich in protein and lipid granules. In the majority of the species, mature oocytes are large (160-180 microm diameter), reaching approx. 600 microm in one solemyid. A puzzling aspect of mature oocyte size is its great variability within a single species (eg 100-482 microm for a vesicomyid); this may be related to individual site characteristics. Once again the deep-sea mytilids constitute an exception, since their oocytes are always in the range of 50-60 microm. Both the oocyte size and the scant knowledge concerning larval life suggest that (with the exception of the mytilids), the larval nutritional strategy is lecithotrophic, compatible with either extended non-feeding dispersal or prolonged benthic development. The deep-sea mytilids, on the other hand, present planktonotrophic larvae which can be dispersive.

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