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Marine Biology

, Volume 22, Issue 2, pp 159–166 | Cite as

Observations sur le développement larvaire de Nyctiphanes couchii (Crustacea: Euphausiacea) au laboratoire

  • A. Le Roux
Article

Résumé

  1. 1.

    Les larves de Nyctiphanes couchii (Bell) ont été élevées au laboratoire, à partir des stades calyptopis II et III, en utilisant des régimes alimentaires animaux végétaux et mixtes.

     
  2. 2.

    N. couchii se nourrit par prédation et par filtration dès la phase calyptopis.

     
  3. 3.

    L'étude a permis de recueillir des informations sur l'ontogénèse des larves (développement des appendices, formation des photophores, réduction du nombre d'épines du telson).

     
  4. 4.

    La vitesse de croissance peut atteindre 0,13 mm par jour, en moyenne, dans les lots nourris de nauplii d'Artemia salina.

     
  5. 5.

    La durée du stade calyptopis III est de 3,7 jours, en moyenne, et celle des stades furcilia est généralement comprise entre 3 et 4 jours, sous nos conditions d'élevage. La durée des stades tend à s'allonger lorsque les larves vieillissent.

     
  6. 6.

    Les régimes alimentaires à base d'algues permettent une croissance plus faibe que les nauplii d'A. salina et provoquent und allongement des intermues et de l'ontogénèse. Un apport limité de nauplii d'A. salina produit des effects comparables.

     

Abstract

Larvae of Nyctiphanes couchii (Bell) were reared in the laboratory from the second and third calyptopis stages; they were fed animal, algal and mixed diets. Data are presented on larval morphology, growth and moulting rates. It is demonstrated that N. couchii is capable of filter-feeding and of capturing prey from the calyptopis phase onwards. The influence of diet on larval development is discussed: algal diets induce a slower growth rate than that achieved by feeding with Artemia salina nauplii alone, and increase the length of intermoult periods and of ontogenesis. A limited supply of A. salina nauplii has similar effects.

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Copyright information

© Springer-Verlag 1973

Authors and Affiliations

  • A. Le Roux
    • 1
  1. 1.Station Biologique de BailleronUniversité de RennesVannesFrance

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