RNA—DNA ratio and other nucleic acid-based indicators for growth and condition of marine fishes

  • L. Buckley
  • E. Caldarone
  • T.-L. Ong
Chapter
Part of the Developments in Hydrobiology book series (DIHY, volume 138)

Abstract

Nucleic acid analysis has provided useful tools to study recent growth and mortality of young fishes and their responses to environmental variability. The ratio of RNA-DNA (R/D) has been shown to respond to changes in feeding conditions and growth after periods as short as 1-3 days in a variety of fish species. The earliest studies used primarily UV-based methods, but most investigators now use more sensitive, fluorometric dye-binding assays to estimate RNA and DNA in individual larvae. These newer methods are very sensitive to procedural details and choice of standards. Analytical methods, normalization and calibration procedures to optimize information obtained from nucleic acid analysis are discussed. We present examples illustrating the technique’s utility, and problems encountered when applying nucleic acid-based indices to fish larvae and early juveniles. The wide use of R/D analysis in studies of fish early life stages, together with a proliferation of analytical methods, demands a major intercalibration exercise.

Key words

nucleic acids fish larvae RNA/DNA condition growth 
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Copyright information

© Springer Science+Business Media Dordrecht 1999

Authors and Affiliations

  • L. Buckley
    • 1
  • E. Caldarone
    • 2
  • T.-L. Ong
    • 3
  1. 1.URI/NOAA CMER Program, Graduate School of OceanographyUniversity of Rhode IslandNarragansettUSA
  2. 2.NOAA, National Marine Fisheries ServiceNortheast Fisheries Science CenterNarragansettUSA
  3. 3.Graduate School of OceanographyUniversity of Rhode IslandNarragansettUSA

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