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MAXIMAL DENSITIES IN SHRIMP, PENAEUS MONODON FABRICIUS, 1798, CULTURES

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From physiological characteristics of a cultured species, the desired harvest weight, and the net oxygen supply to the culture system, the maximal densities at which the species can be cultured can be derived with reasonable accuracy. From this it can be judged whether a culture system is operated at optimal conditions. With higher harvest weights, the density of the cultured animals has to be reduced. As the relation between density and harvest weight is not linear, such a reduction in density does not imply a lower yield. The reduction of animal density with increasing size can be counteracted by forced aeration. Calculations are presented which give a clue to the question whether a shift from a semi-intensive system to a intensive (or super-intensive) system might be considered.

Des caracteristiques physiologiques d'une espece elevee peuvent etre deduites avec une raisonnable exactitude le poids de recolte desire, l'apport net d'oxygene au systeme d'elevage, ainsi que les densites maximales auxquelles l'espece peut etre elevee. On peut ainsi juger si le systeme d'elevage presente les conditions optimales. Avec les poids de recolte plus eleves, la densite des animaux en elevage doit etre reduite. Comme la relation densite/poids de recolte n'est pas lineaire, une telle reduction de densite n'implique pas une production plus faible. La reduction de la densite des animaux avec l'accroissement de taille peut etre contrebalancee par une aeration forcee. Des calculs sont presentes qui permettent de repondre a la question de savoir si on peut envisager un passage d'un systeme semi-intensif a un systeme intensif (ou super-intensif).

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/content/journals/10.1163/156854099502781
1999-01-01
2016-12-07

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