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Cultivation of ornamental molly (Poecilia sp.) fish in treated sewage: zootechnical performance and animal welfare evaluation

This work evaluated the treated sewage reuse in ornamental molly fish creation, evaluating the zootechnical performance and animal welfare. Three treatments were tested: ET - supplied with treated sewage; ED - supplied with sewage and raw water in the same proportion; AB - supplied with raw water. The physical-chemical results indicated that the treated sewage from stabilization ponds was adequate for the species cultivation only when diluted in raw water. Among the welfare indicators, only histopathological evaluation was able to provide conclusive results, which showed that the treated sewage diluted treatment was the best in terms of comfort for the cultivated species. The ornamental characteristics of farmed fish were not influenced by the use of treated sewage, in which the patterns of color and shape of fins were not changed.

ornamental aquaculture; stabilization ponds; molly fish (Poecilia sp.); water reuse


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