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THE DETERMINATION OF RELATIVE GROWTH IN CRUSTACEA BY R. G. HARTNOLL Department of Marine Biology, University of Liverpool, Port Erin, Isle of Man, U.K. INTRODUCTION In the course of growth it is usual for certain dimensions to increase at rates different from others, so that there is a change in proportions with size: this is relative growth, and for several reasons the Crustacea have proved a particularly suitable subject for its investigation. Their hard integument facilitates accurate measurement, the process of ecdysis enables the clear subdivision of ontogeny, and there are frequently wide differences in growth rates between male and female and between immature and mature specimens. So it is not surprising that the Crustacea, and in particular the Brachyura, featured in several of the earliest studies of relative growth (see Huxley, 1932) and in a considerable number of sub- sequent investigations (see Hartnoll, 1974). Most of the examples used here will be drawn from the Brachyura, but most of the conclusions are relevant to all the Crustacea, and some to the general phenomenon of relative growth. At an early stage in the study of relative growth (Huxley, 1924) it was demonstrated that nearly all examples could be
Crustaceana – Brill
Published: Jan 1, 1978
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