Marine Biology

, Volume 93, Issue 2, pp 217–223 | Cite as

Population dynamics and secondary production in an estuarine population of Nephtys hombergii (Polychaeta: Nephtyidae)

  • J. A. Oyenekan


From July 1978 to March 1980, a study was made on the distribution, population dynamics and secondary production of Nephtys hombergii Audouin et Edw. occurring in the sublittoral industrialised region of Southampton Water in south England. The distribution of the worm was related to the silt content and copper level of the sediment, the greatest densities of N. hombergii being found in sediment containing 60 to 100% silt. Breeding occurred at a low level throughout the year, with a maximum in July to September and November to January in the second year of growth. Spawning occurred when the oocytes measured 200μm in diameter, and unshed gametes were resorbed. Annual production varied between 0.092 and 4.32 g C m-2 yr-1 (ash-free dry weight) and amounted to 1.9–39.4% of the total macrofaunal production at the sampling stations. The production:biomass (P:B) ratio of the species varied between 1.6 and 2.9.


Copper Biomass Silt Population Dynamic Sampling Station 
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Copyright information

© Springer-Verlag 1986

Authors and Affiliations

  • J. A. Oyenekan
    • 1
  1. 1.Department of OceanographyThe University of SouthamptonSouthamptonEngland

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