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A Nomograph for the Computation of the Growth of Fish from Scale Measurements
Author(s) -
Hile Ralph
Publication year - 1950
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1948)78[156:anftco]2.0.co;2
Subject(s) - graduation (instrument) , fish <actinopterygii> , scale (ratio) , computation , ruler , statistics , mathematics , biology , algorithm , fishery , geometry , geography , cartography , physics , quantum mechanics
Directions are given for the construction and operation of a nomograph that can be employed for the computation of the growth of fish from scale measurements regardless of the nature of the body‐scale relationship, so long as that relationship is known. The essential feature of the nomograph that makes rapid calculations possible is a ruler on which the graduations are in terms of length with the distance of each length graduation from the O graduation equal to the corresponding theoretical scale measurement. The chief advantage of the nomograph lies in the fact that the calculation of the lengths for all years of life of an individual fish requires only one setting of the single movable part.