Temperature effects on growth and nucleic acids in laboratory-reared larval coregonid fish

A. M. Malzahn, C. Clemmesen, H. Rosenthal

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Somatic growth and nucleic acid content were studied in North Sea houting Coregonus oxyrhinchus larvae fed exclusively on dry diets at 2 temperatures (8. 4 and 17.5°C) during a 32 d rearing experiment. The higher temperature enhanced growth significantly. Mean dry weights at the end of the experiment were 3.6 mg (SD = 1.07, range 1.4 to 5.7 mg) and 31.5 mg (SD = 21.9, range 3.6 to 96.0 mg), and mean standard lengths were 17.7 ± mm (SD = 1.6, range 11.8 to 19.6 mm) and 25.5 mm (SD = 4.2, range 17.0 to 35 mm), respectively. Significant responses to temperature were also found in the nucleic acids. However, these differences were not as remarkable and gave indications that differences in protein growth between treatments was based on protein biosynthesis being driven by the activity of the ribosomes, rather than their number. The use of the degree-day approach to normalize the data clearly showed the temperature-dependence of somatic growth. Only small differences in growth and nucleic acid content were observed in the comparable range of the first 280 degree-days in fed fish. In non-fed fish, the starving potential was very similar (approx. 350 degree-days). Shifts in growth pattern from predominantly hyperplasia to predominantly hypertrophy were detected, with ongoing growth at both temperatures.

Original languageEnglish
Pages (from-to)285-293
Number of pages9
JournalMarine Ecology Progress Series
Volume259
Publication statusPublished - Sep 12 2003

Fingerprint

nucleic acid
temperature effect
nucleic acids
heat sums
fish
temperature
Coregonus
ribosomes
hypertrophy
hyperplasia
North Sea
fish feeds
protein
rearing
protein synthesis
laboratory
larvae
experiment
diet
larva

Keywords

  • Coregonus
  • Larvae
  • RNA:DNA ratio
  • Temperature effects
  • Whitefish

ASJC Scopus subject areas

  • Aquatic Science
  • Ecology

Cite this

Temperature effects on growth and nucleic acids in laboratory-reared larval coregonid fish. / Malzahn, A. M.; Clemmesen, C.; Rosenthal, H.

In: Marine Ecology Progress Series, Vol. 259, 12.09.2003, p. 285-293.

Research output: Contribution to journalArticle

Malzahn, A. M. ; Clemmesen, C. ; Rosenthal, H. / Temperature effects on growth and nucleic acids in laboratory-reared larval coregonid fish. In: Marine Ecology Progress Series. 2003 ; Vol. 259. pp. 285-293.
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