El presente trabajo se realizó entre octubre y diciembre de 2016, teniendo como objetivo evaluar el efecto de la inclusión del probiótico EM-Camarón (0, 5, 10 y 15%/kg) en el crecimiento de alevinos de Paco, Piaractus barchypomus. Se trabajó con 240 alevinos de Piaractus brachypomus (9.83 ± 0.105 g y 7.47 ± 0.04 cm), producidos mediante la reproducción artificial en el Centro de Investigación Dale E. Bandy del Instituto de Investigaciones de la Amazonía Peruana, sede Ucayali. Los alevinos fueron distribuidos en 12 tanques, a una densidad de 20 alevinos/0.4m3. Se suministró un alimento comercial extrusado de 28% PB, la tasa alimenticia de 5% y frecuencia de alimentación 3 veces al día, durante 90 días. Quincenalmente se realizó biometría (peso y longitud total) para determinar los índices zootécnicos: ganancia longitud (GL), ganancia de peso (GP), ganancia de peso diario...

The aim of this study was to determine the presence of the copepod Perulernaea gamitanae in juveniles of Colossoma macropomum and to relate the abundance of the parasite with the length and weight of the hosts. Thirty specimens of 29.1 ± 2.8 cm of total length and 506.3 ± 124.6 g of body weight from a semi-intensive fish farm in Maynas, Loreto (Peru) were evaluated. It was collected 120 individuals of P. gamitanae located in the buccal cavity and in the cartilages of the gills. The prevalence was 90%, the mean intensity was 4.4 parasites/infested fish, the average abundance was 4 parasites/fish, with an intensity range of 1 to 10 parasites/fish. The abundance of this copepod was related to the length and weight of the host. This is the second record of P. gamitanae in C. macropomun in fish farms in the Peruvian Amazon.

The aim of this study was to determine the presence of the copepod Perulernaea gamitanae in juveniles of Colossoma macropomum and to relate the abundance of the parasite with the length and weight of the hosts. Thirty specimens of 29.1 ± 2.8 cm of total length and 506.3 ± 124.6 g of body weight from a semi-intensive fish farm in Maynas, Loreto (Peru) were evaluated. It was collected 120 individuals of P. gamitanae located in the buccal cavity and in the cartilages of the gills. The prevalence was 90%, the mean intensity was 4.4 parasites/infested fish, the average abundance was 4 parasites/fish, with an intensity range of 1 to 10 parasites/fish. The abundance of this copepod was related to the length and weight of the host. This is the second record of P. gamitanae in C. macropomun in fish farms in the Peruvian Amazon.

            The aim of this study was to describe a case of Piscinoodinium pillulare infestation and mortality in juveniles of Colossoma macropomum. In March 2019, 21 juvenile specimens of a semi-intensive fish farm were collected in the Maynas area, Loreto (Peru). Parasitological analysis of the external parts of the fish was performed and the presence of P. pillulare located on the skin, fins, gills, and nostrils was observed. Furthermore, a 30% mortality was recorded (1500 out of 5000 seeded). The non-disinfection of the pond, the inadequate control in the feeding, and the proliferation of Oreochromis niloticus (tilapia) in the culture were the causes of the proliferation of P. pillulare. This is the first reported case of P. pillulare infestation in juveniles of C. macropomum grown in the Peruvian Amazon.

            The aim of this study was to describe a case of Piscinoodinium pillulare infestation and mortality in juveniles of Colossoma macropomum. In March 2019, 21 juvenile specimens of a semi-intensive fish farm were collected in the Maynas area, Loreto (Peru). Parasitological analysis of the external parts of the fish was performed and the presence of P. pillulare located on the skin, fins, gills, and nostrils was observed. Furthermore, a 30% mortality was recorded (1500 out of 5000 seeded). The non-disinfection of the pond, the inadequate control in the feeding, and the proliferation of Oreochromis niloticus (tilapia) in the culture were the causes of the proliferation of P. pillulare. This is the first reported case of P. pillulare infestation in juveniles of C. macropomum grown in the Peruvian Amazon.