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Effects of feeding regime on food consumption, growth rates and tissue nucleic acids in juvenile Arctic charr, Salvelinm alpinus , with particular respect to compensatory growth
Author(s) -
Mlglavs I.,
Jobling M.
Publication year - 1989
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1989.tb03377.x
Subject(s) - biology , juvenile , compensatory growth (organ) , nucleic acid , fish <actinopterygii> , rna , zoology , juvenile fish , dna , endocrinology , fishery , ecology , biochemistry , gene , kidney
Juvenile Arctic charr responded to a change from restricted to satiation feeding by showing a growth spurt (compensatory growth). During this period of rapid growth the fish became hyper‐phagic and in the days immediately following transfer from restricted to satiation feeding showed improved food conversion efficiency compared to their counterparts raised on a liberal feeding regime. Tissue (liver and muscle) nucleic acid concentrations were influenced by feeding regime, and RNA : DNA ratios were low in both starved fish and those fed restricted rations. Following transfer from restricted to satiation feeding, tissue RNA : DNA ratios were rapidly restored to initial levels. The uses of tissue RNA: DNA ratios both in evaluating nutritional status and as growth indices are discussed.