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Growth model of the reared sea urchin Paracentrotus ... - SciViews

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Aim <strong>of</strong> <strong>the</strong> <strong>the</strong>sis<br />

AIM OF THE THESIS<br />

The ultimate goal <strong>of</strong> this work is to formulate a mechanistic <strong>model</strong> –that is, whose<br />

parameters are functionally interpretable– <strong>of</strong> somatic growth <strong>of</strong> <strong>the</strong> <strong>sea</strong> <strong>urchin</strong><br />

<strong>Paracentrotus</strong> lividus in cultivation. Artificial culture conditions <strong>of</strong>fer <strong>the</strong> opportunity<br />

to work with echinoids whose age, genetic origin, environmental and food conditions<br />

are perfectly known. However, we need to set up a rearing protocol adapted to P.<br />

lividus. We have also to define which is <strong>the</strong> best measurement <strong>of</strong> body size, and what<br />

it exactly represents (an overall trend in growth, or just <strong>the</strong> growth <strong>of</strong> one<br />

compartment or one organ <strong>of</strong> <strong>the</strong> echinoid). Once <strong>the</strong>se issues are solved, we will<br />

have to conduct experiments on <strong>reared</strong> <strong>sea</strong> <strong>urchin</strong>s to reveal underlying processes that<br />

influence growth. Using <strong>the</strong> results <strong>of</strong> <strong>the</strong>se experiments we can <strong>the</strong>n elaborate an<br />

original ma<strong>the</strong>matical <strong>model</strong> that functionally describes growth <strong>of</strong> P. lividus <strong>reared</strong> in<br />

an aquaculture system, including those underlying processes.<br />

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