Marine Biology

, Volume 102, Issue 4, pp 519–527 | Cite as

Effect of food type and ration on growth of juvenile Capitella sp. I (Annelida: Polychaeta): macro- and micronutrients

  • A. G. Marsh
  • A. Gémare
  • K. R. Tenore


Growth rates of juvenile Capitella sp. I were determined on different rations of six food types: Gerber's mixed cereal, TetraMin fish flakes, benthic diatoms, Ulva sp., spring detritus, and summer detritus. A simple growth model estimated maximum growth rate and maintenance ration for each food. There were differences in the growth response among foods relative to nitrogen content. As juveniles increased in size, differences in growth between foods became more pronounced. For all juveniles, growth rates were correlated with levels of the amino acids histidine, phenylalanine, threonine, and valine, and the polyunsaturated fatty acid 20:5w3; correlations with histidine and phenylalanine levels were the most significant. Regressions of growth rates as a function of these two amino acids suggest a daily maintenance ration of 300 pg histidine and phenylalanine mg-1 nitrogen biomass. Juvenile worms grew on spring detritus but not on summer detritus, indicating the probable importance of micronutrients (polyunsaturated fatty acids, amino acids) for growth of juvenile Capitella sp. I in the field.


Histidine Phenylalanine Polyunsaturated Fatty Acid Detritus Polychaeta 
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Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • A. G. Marsh
    • 1
  • A. Gémare
    • 1
  • K. R. Tenore
    • 1
  1. 1.Chesapeake Biological LaboratoryUniversity of MarylandSolomonsUSA

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