Marine Biology

, Volume 35, Issue 1, pp 79–84 | Cite as

The Hiatt growth diagram for crustacea

  • J. Mauchline


The Hiatt growth diagram relates post-moult to pre-moult size in crustaceans. Size in this context is most frequently defined by a linear measurement of length or width. Linear regression analysis of data on the Hiatt growth diagram is used to define growth constants. This assumes that growth factors (percentage increase in body size) at successive moults remain constant over the length of the line. Growth factors, however, decrease logarithmically at successive moults. Consequently, points on a Hiatt growth diagram are fitted better by a hyperbola than a straight line. The method of fitting an equation for a hyperbola is given. The best growth constant is the moult slope factor which is the factor by which the growth factor decreases at each successive moult. This is comparable with the intermoult period slope factor, the factor by which the intermoult period increases at each successive moult. These constants can be used to determine the moulting and growth sequences throughout the life of a crustacean.


Growth Factor Linear Regression Regression Analysis Body Size Linear Regression Analysis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • J. Mauchline
    • 1
  1. 1.Dunstaffnage Marine Research LaboratoryObanScotland

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