Journal ArticleDOI
The effect of food availability, age or size on the RNA/DNA ratio of individually measured herring larvae: laboratory calibration
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TLDR
RNA/DNA ratios in individual herring larvae (Clupea harengus) were measured and proved suitable for determining nutritional status and showed an increase with age or length of the larvae and was less pronounced in starving larvae compared to fed larvae.Abstract:
RNA/DNA ratios in individual herring (Clupea harengus) larvae (collected from Kiel Bay, Baltic Sea, in 1989) were measured and proved suitable for determining nutritional status. Significant differences between fed and starving larvae appeared after 3 to 4 d of food deprivation in larvae older than 10 d after hatching. The RNA/DNA ratio showed an increase with age or length of the larvae and was less pronounced in starving larvae compared to fed larvae. The individual variability of RNA/DNA ratios in relation to larval length of fed larvae and of larvae deprived of food for intervals of 6 to 9 d is presented. Based on the length dependency and the individual variability found within the RNA/DNA ratios, a laboratory calibration is given to determine whether a larva caught in the field has been starving or not. An example for a field application is shown.read more
Citations
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Journal ArticleDOI
Biological stoichiometry from genes to ecosystems.
James J. Elser,Robert W. Sterner,Elena Gorokhova,William F. Fagan,Therese A. Markow,James B. Cotner,Jon F. Harrison,Sarah E. Hobbie,G. M. Odell,L. W. Weider +9 more
TL;DR: It is hypothesized that the continuous generation of variation in the rDNA may also play a role in how species interactions develop in ecosystems under different conditions of energy input and nutrient supply.
Book ChapterDOI
An Appraisal of Condition Measures for Marine Fish Larvae
A. Ferron,William C. Leggett +1 more
TL;DR: The chapter illustrates that, future research on condition indices is likely to be more productive if it is devoted to the refinement of existing methods, rather than to search for the ideal condition index.
Journal ArticleDOI
RNA:DNA ratio and other nucleic acid derived indices in marine ecology.
TL;DR: Using indicators, such RNA:DNA ratios and other nucleic acids derived indices concomitantly with organism and ecosystems measures of responses to climate change will allow for the development of more rigorous and realistic predictions of the effects of anthropogenic climate change on marine systems.
Journal ArticleDOI
Nutrient limitation of primary producers affects planktivorous fish condition
TL;DR: The results show that mineral nutrient requirements of consumers have to be satisfied first before fatty acids can promote further growth, and challenges the match/mismatch hypothesis, and could imply that reduced nutrient releases into the environment may affect fish stocks even more severely than previously believed.
Journal ArticleDOI
Effect of ocean acidification on early life stages of Atlantic herring ( Clupea harengus L.)
Andrea Franke,Catriona Clemmesen +1 more
TL;DR: The results indicate that an increased pCO2 can affect the metabolism of herring embryos negatively, which can have consequences for the larval fish, since smaller and slow growing individuals have a lower survival potential due to lower feeding success and increased predation mortality.
References
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Book
Fluctuations in the Great Fisheries of Northern Europe: Viewed in the Light of Biological Research
Journal ArticleDOI
The physiology of digestion in fish larvae
TL;DR: Assimilation efficiency may be lower in larvae than it is in adult fishes, due to a lack of a morphological and functional stomach in larvae, but the question of improving assimilation efficiencies during larval development before transformation remains unresolved.
Journal ArticleDOI
RNA-DNA ratio: an index of larval fish growth in the sea
TL;DR: Water temperature and larval RNA-DNA ratio explained 92% of the variability in growth rate of laboratory-reared larvae and suggest that short-term growth under favorable conditions may be considerably higher than expected from long-term indicators.
Journal ArticleDOI
The relative importance of muscle protein synthesis and breakdown in the regulation of muscle mass.
TL;DR: The effects of growth-suppressing and muscle-wasting treatments on muscle protein turnover and amino acid concentrations were determined in vivo and the increased concentrations of the branched-chain amino acids indicate that they are unlikely to be involved in regulation.