caa a22 4500 477115543 CHVBK 20180405111621.0 cr unu---uuuuu 170330e19960701xx s 000 0 eng 10.1007/BF00005008 doi (NATIONALLICENCE)springer-10.1007/BF00005008 Živkov Mladen Bulgarian Academy of Sciences, Institute of Zoology, Boulv. Tsar Osvoboditel 1, 1000, Sofia, Bulgaria aut Critique of proportional hypotheses and methods for back-calculation of fish growth [Elektronische Daten] [Mladen Živkov] Synopsis: Hypotheses which assume a contant proportional deviation of the individual size of fish scales (S) or body (L) from mean size throughout life are biologically insignificant. Growth is considered and illustrated as a complex self-regulating process which continuously changes throughout ontogeny. Speed and form of changes of the growth of individual fish depend mainly on the initial size of the specimen and on the habitat. Consider five main types of changes of the L-S regression lines for individual fish with different initial sizes. They are basically different from the current proportional model of individual growth. The regression lines for individual fish cannot and should not be used for back-calculating L from S either by proportional or by regression methods, as individual L(S)/theoretical L(S) ratio, determined at the time of capture, are usually considerably different, compared to the previous years. For back-calculation of the average L values from average S values the use of separate equations for each age-group or for the whole subpopulation are recommended. Kluwer Academic Publishers, 1996 Individual growth nationallicence Growth compensation nationallicence Regulation nationallicence Ontogenetic allometry nationallicence Cyprinus carpio nationallicence Leuciscus cephalus nationallicence Rutilus rutilus nationallicence Abramis brama nationallicence Environmental Biology of Fishes Kluwer Academic Publishers 46/3(1996-07-01), 309-320 0378-1909 46:3<309 1996 46 10641 https://doi.org/10.1007/BF00005008 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00005008 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Živkov Mladen Bulgarian Academy of Sciences, Institute of Zoology, Boulv. Tsar Osvoboditel 1, 1000, Sofia, Bulgaria aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Kluwer Academic Publishers 46/3(1996-07-01), 309-320 0378-1909 46:3<309 1996 46 10641 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer