Prolonged exposure to captive conditions has led to the development of a rainbow trout 'farmed' phenotype, which is different from that of wild trout. Selection for desirable productive traits in hatcheries has resulted in the development of some morphological traits that are maladaptive in nature. The recent development of organic aquaculture, guided by the well-being of the fish, could potentially produce a new farmed phenotype that would be more adaptive in nature. In this study, rainbow trout reared in intensive and organic farms were compared by means of shape analysis, to detect patterns of shape variation associated with rearing environment. The results of this study highlight a significant effect of the rearing method on rainbow trout shape: organically reared trout showed a higher body profile, in particular in the head and trunk regions, shorter median fins and a deeper caudal peduncle. A combined effect of density and habitat complexity could have contributed to the observed shape differences: in organic rearing systems, lower densities and steady water could increase territoriality and aggressive interactions, promoting body designs more functional in rapid attacks and escapes.

Pulcini, D., Russo, T., Reale, P., Massa Gallucci, A., Brennan, G., Cataudella, S. (2014). Rainbow trout (Oncorhynchus mykiss, Walbaum ) develop a more robust body shape under organic rearing. AQUACULTURE RESEARCH, 45(3), 397-409 [doi: 10.1111/j.1365-2109.2012.03236.x].

Rainbow trout (Oncorhynchus mykiss, Walbaum ) develop a more robust body shape under organic rearing

RUSSO, TOMMASO;CATAUDELLA, STEFANO
2014-02-01

Abstract

Prolonged exposure to captive conditions has led to the development of a rainbow trout 'farmed' phenotype, which is different from that of wild trout. Selection for desirable productive traits in hatcheries has resulted in the development of some morphological traits that are maladaptive in nature. The recent development of organic aquaculture, guided by the well-being of the fish, could potentially produce a new farmed phenotype that would be more adaptive in nature. In this study, rainbow trout reared in intensive and organic farms were compared by means of shape analysis, to detect patterns of shape variation associated with rearing environment. The results of this study highlight a significant effect of the rearing method on rainbow trout shape: organically reared trout showed a higher body profile, in particular in the head and trunk regions, shorter median fins and a deeper caudal peduncle. A combined effect of density and habitat complexity could have contributed to the observed shape differences: in organic rearing systems, lower densities and steady water could increase territoriality and aggressive interactions, promoting body designs more functional in rapid attacks and escapes.
feb-2014
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore BIO/07 - ECOLOGIA
English
Con Impact Factor ISI
Domestication; Organic aquaculture; Rainbow trout; Shape analysis;
Italian Minister for Agricultural, Alimentary and Forestry Policies Law 41/82
http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2109.2012.03236.x/abstract;jsessionid=A958470BE7244AA1AB60DFE4DBB0FC76.f03t01
Pulcini, D., Russo, T., Reale, P., Massa Gallucci, A., Brennan, G., Cataudella, S. (2014). Rainbow trout (Oncorhynchus mykiss, Walbaum ) develop a more robust body shape under organic rearing. AQUACULTURE RESEARCH, 45(3), 397-409 [doi: 10.1111/j.1365-2109.2012.03236.x].
Pulcini, D; Russo, T; Reale, P; Massa Gallucci, A; Brennan, G; Cataudella, S
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/101918
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