Publication: Influence of the stocking density on the growth, feeding,
survival rate and muscle cellularity of juvenile specimens of
common name shi drum, Umbrina cirrosa L.
Authors
Ayala Florenciano, María Dolores ; Molera, Ángela ; García Alcázar, Alicia ; Arizcun, Marta
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Publisher
Iranian Fisheries Science Research Institute (IFSRI)
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Description
© 2020. This manuscript version is made available under the CC-BY-NC 4.0 license http://creativecommons.org/licenses/by-nc/4.0/
This document is the Published Manuscript version of a Published Work that appeared in final form in Iranian Journal of Fisheries Sciences. To access the final edited and published work see https://doi.org/0.22092/ijfs.2019.118830
Abstract
Common name Umbrina cirrosa specimens (mean weight 9.5 g, mean length 9 cm)
were categorized in three densities (4, 9 and 15 kg m-3) in order to study the influence
of stocking density on the growth, survival rate and feed conversion rates. The body
and muscle parameters were studied at 0, 43 and 84 days of the experiment. After 43
days, the highest body parameters values (body length and weight) were found in
specimens reared at 9 kg m-3, followed by the specimens reared at 4 kg m-3, showing
the specimens reared at 15 kg m-3 the lowest growth. These results showed a negative
effect of high density on the growth, being the intermediate density (9 kg m-3) the most
favorable density for the growth at this stage. Muscle cellularity was different among
the groups, being the hypertrophy values higher at high density of rearing (15 kg m-3)
than at 4 and 9 kg m-3. In contrast, the hyperplasia was higher at 4 kg m-3 than in the
rest of densities. The group reared at 9 kg m-3 showed intermediate values of
hypertrophy and hyperplasia. At 84 days of the experiment, the muscle cellularity was
similar at 4 and 9 kg m-3, this indicating a compensatory hypertrophic growth at 4 kg m-
3. The highest values of body weight were reached at 9 kg m-3. Moreover, the feed
conversion rates and the percentage of survival rate were better at 9 than at 4 kg m-3
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