Marine Biology

, Volume 111, Issue 1, pp 129–137 | Cite as

Reproduction, larval development and post-larval growth ofNaineris laevigata (Polychaeta, Orbiniidae) in the Mediterranean Sea

  • A. Giangrande
  • A. Petraroli
Article

Abstract

To investigate the life-history adaptations of a brackish-water population ofNaineris laevigata Grube, a population from Acquatina lagoon near Lecce (Italy) was studied. Benthos and plankton samples were collected monthly over a period of ca. 2 yr (1989–1990). Observations of gametogenesis indicate that oogenesis is intraovaric, probably with autosynthetic yolk formation. Oogenesis takes about 7 mo, from November to April–May, for both proliferative and vitellogenetic phases. Reproduction is synchronized within the population. Spawning has also been obtained under laboratory conditions where larval development and post-larval growth were studied. Eggs measured 240 µm in diameter and were spawned within a gelatinous mass. The lecithotrophic pelagic stage was very short. Reproductive effort was high, probably because of high food availability and low level of competition. One of the most interesting findings was the probable presence of a resting stage in the life-cycle. The adaptive significance of enclosing the eggs in gelatiuous masses and of reducing the duration of the pelagic stage is discussed.

Keywords

Food Availability Laboratory Condition High Food Polychaeta Larval Development 

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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • A. Giangrande
    • 1
  • A. Petraroli
    • 1
  1. 1.Dipartimento di BiologiaUniversità degli Studi di LecceLecceItaly

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