Development, validation and field application of an RNA-based growth index in juvenile plaice Pleuronectes platessa

A general mechanism relating RNA concentration and growth rate is derived from four physiological assumptions and developed into a growth index for juvenile plaice Pleuronectes platessa. The index describing instantaneous growth rates (G, day-1) in the laboratory with the lowest Akaike information c...

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Bibliographic Details
Published in:Journal of Fish Biology
Main Authors: Ciotti, Benjamin J., Targett, Timothy E., Nash, Richard DM, Batty, Robert S, Burrows, Michael, Geffen, Audrey J.
Format: Article in Journal/Newspaper
Language:English
Published: 2010
Subjects:
PROTEIN SYNTHETIC CAPACITY
RAINBOW-TROUT
TROUT ONCORHYNCHUS-MYKISS
Marine & Freshwater Biology
Fisheries
COD GADUS-MORHUA
NUCLEIC-ACID CONTENT
SOFT-SEDIMENT BENTHOS
FLOUNDER PSEUDOPLEURONECTES-AMERICANUS
DRUM SCIAENOPS-OCELLATUS
DUTCH WADDEN SEA
OTOLITH MICROSTRUCTURE ANALYSIS
Gadus morhua
Sciaenops ocellatus
Online Access:https://pure.uhi.ac.uk/en/publications/740f7aa0-41e4-4259-9514-fd0b8c596e3a
https://doi.org/10.1111/j.1095-8649.2010.02786.x
Description
Summary:A general mechanism relating RNA concentration and growth rate is derived from four physiological assumptions and developed into a growth index for juvenile plaice Pleuronectes platessa. The index describing instantaneous growth rates (G, day-1) in the laboratory with the lowest Akaike information criterion with small-sample bias adjustment was a function of RNA concentration (R, ), temperature (T, degrees K), body mass (M, g) and DNA concentration (D, ): G = beta(0) + beta(R) R + beta T-T + beta(T2)T2 + beta M-M + beta D-D + beta RTRT. RNA concentration began to respond to changes in feeding conditions within 8 days, suggesting that the index reflects growth rate in the short-term. Furthermore, the index distinguished between rapid growth and negative growth of juvenile P. platessa measured directly in laboratory and field enclosures, respectively. An application of the RNA-based growth index at two beaches on the west coast of Scotland suggested that the growth of juvenile P. platessa varies considerably in space and time and is submaximum in late summer.

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