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Salmonids form dominance hierarchies in environments, where space or food are limiting. Our first objective was to investigate the physiology of individual rainbow trout in 4-fish hierarchies. Our second was to compare conclusions drawn from grouping physiological data on the basis of social rank with those based on relating individual physiology to individual aggressive behavior. To create a social...
Four different stocking densities (2, 7, 15 and 30 kg m −2 ) of the flatfish Senegalese sole (Solea senegalensis) were assayed using 70 g juveniles throughout a 60 days culture period. No differences were found with regards to growth parameters in terms of biomass production or body weight gain as a function of fish stocking density. Ingested feed increased from 0.134±0.01 to 0.201±0.01% (relative...
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