With the objective of evaluating the effect of formalin and the aqueous extract of the leaves of Mansoa alliacea "ajos sacha" (EAHAS) in the control of monogeneous parasites present in adults of Otocinclus affinis, parasitological examinations were carried out on 400 specimens, analyzing skin, fins and gills; the monogeneans were fixed in permanent sheets using the Gray & Wess method, and their parasitic indices were determined: prevalence, average intensity, average abundance. For the bioassay of the lethal median concentration (LC50-96h), 720 specimens were used, distributed in a completely random design, in 6 treatments with 3 repetitions, evaluating the formalin concentrations (0, 0.05, 0.1, 0.15, 0.2 and 0.25 mL/L) and the EAHAS (0.5, 15, 25, 35, 45 mL/L). For the efficacy bioassay of formalin and Mansoa alliacea "ajos sacha" leaf extract (EAHAS) in controlling monogeneans, a total ...

Con el objetivo de evaluar el efecto del formol y el extracto acuoso de las hojas de Mansoa alliacea “ajos sacha” (EAHAS) en el control de parásitos monogeneos presentes en adultos de Otocinclus affinis, se realizaron exámenes parasitológicos a 400 especímenes, analizándose piel, aletas y branquias; los monogeneos fueron fijados en láminas permanentes mediante el método de Grey & Wess, y se determinó sus índices parasitarios: prevalencia, intensidad media, abundancia media. Para el bioensayo de la concentración media letal (CL50-96h), se utilizaron 720 especímenes, distribuidos en un diseño complemente al azar, en 6 tratamientos con 3 repeticiones, evaluando las concentraciones de formol (0, 0.05, 0.1, 0.15, 0.2 y 0.25 mL/L) y del EAHAS (0.5, 15, 25, 35, 45 mL/L). Para el bioensayo de eficacia del formol y del extracto de las hojas de Mansoa alliacea “ajos sacha” (EAH...

The exotic fish Trichopodus trichopterus, popularly known as gourami, is a species native to Asia, which has been introduced globally, being present in all continents of the world. This species has all the necessary characteristics to be considered a "dangerous" exotic species for natural environments, being necessary to carry out studies to determine its possible impacts on natural environments. In this context, the main objective of this study was to evaluate the populations of gourami and their possible impacts on native species in waters adjacent to the city of Iquitos, Peru. The results of the study revealed the presence of the gourami in more than 70% of the sampled premises, with dominance of approximately 30% in relation to the presence of other fish species; The stomach contents revealed the presence of food items that helped determine that this species is generalist and opportu...

En la empresa exportadora de peces ornamentales ACUATRADE SAC, de la Región Loreto, la mortandad interna era de hasta 12%, detectándose que tales pérdidas obedecían a la inconstante calidad de agua, la cual proviene del sub suelo y es tratada con floculación diariamente luego de extraerla. El uso de humedales artificiales para reciclar y reusar las aguas efluentes de los peces en acopio, redujo drásticamente la tasa de mortandad y el uso de agua del subsuelo.

In Acuatrade SAC, tropical fish export company in the Loreto Region, the mortality rate was up to 12%, it was detected that such loses were due to the un constant water quality, this is well water and is treated every day with flocculation immediately after be extracted. The use of artificial wetlands for reuse and recycling of the effluent waters from the tropical fish facility reduced drastically the mortality rate and the use of well water

El comercio de peces ornamentales es una de las actividades económicas más importantes para miles de personas en la región amazónica. Entre los peces que se exportan desde Perú, Apistogramma sp., Cichlasoma amazonarum (Kullander, 1983) y Pterophyllum scalare (Schultze, 1823) son muy demandados en las actividades comerciales de peces ornamentales. A la fecha, en el Perú, los estudios referentes a los parásitos que afectan las actividades acuícolas son escasos, es así que el presente estudio registra por primera vez en la Amazonía peruana la ocurrencia de Clinostomum sp. parasitando tres especies de cíclidos. Se recolectaron muestras de Apistogramma sp., C. amazonarum y P. scalare en un estanque de piscicultura del “Centro de Investigación de Peces Ornamentales de la Amazonía (ARCOF) en Iquitos, Perú. Las muestras analizadas revelaron la presencia de Clinostomum sp. parasit...

Platynematichthys notatus (Jardine, 1841), popularly known as "lince cat" stands out for being a very popular species in the ornamental fish market, being exported to different parts of the world. Despite its economic importance, the existing information on helminths that parasitize this species is very scarce. In this sense, the present study identified monogenoids that parasitize the gills of this fish. The gills of ten specimens of P. notatus from the commercial aquarium AQUATRADE SAC, placed in Iquitos-Peru were analyzed. After taxonomic identification, Boegeriella conica Mendoza-Palmero, Mendoza-Franco, Acosta & Scholz, 2019 was reported as the species that parasitizes the gills of P. notatus. The main morphological characteristics of the species are: a coiled tubular male copulatory organ forming approximately 2 1/2 rings, an accessory piece of a sigmoid shape, bars with anteri...

            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.

The ornamental fish trade is one of the most important economic activities for thousands of people in the Amazon region. Among fish that are exported from Peru, Apistogramma sp., Cichlasoma amazonarum (Kullander, 1983) and Pterophyllum scalare (Schultze, 1823) are highly demanded in the ornamental fish trade activities. To date, in Peru, studies concerning to parasites that affect aquaculture activities are scarce, in that way, the present study registers for the first time in the Peruvian Amazonia the occurrence of Clinostomum sp. parasitizing three species of cichlids. Samples of Apistogramma sp., C. amazonarum and P. scalare were collected in a fish farming pond of the “Amazon Research Center for Ornamental Fishes (ARCOF) in Iquitos, Peru. Analyzed samples revealed the presence of Clinostomum sp. parasitizing the fins of the fish. As some species of cichlids are cultivated in the Pe...

The present work corresponds to a fish inventory, carried out between August and September 2019, in three sampling sites in the Pintuyacu stream, a tributary of the Itaya River basin, in the Peruvian Amazon. Based on 504 individuals analyzed, 117 species were identified, corresponding to 33 families and 8 orders. The most diverse order was Characiformes (65 species, 55.6%), followed by Siluriformes (31 species, 26.5%). At the Characidae family level, it presents the highest species richness with 24 species (20.5%). The most abundant species were Stethaprion erythrops (13.1%, 66 individuals), Knodus smithi (13.1%, 66 individuals) and Bujurquina peregrinabunda (6.2%, 31 individuals). Species for ornamental and consumer use were recorded. No threatened species were recorded and most were classified as Least Concern (LC), according to IUCN criteria. The present study is the first to present ...

The present work corresponds to a fish inventory, carried out between August and September 2019, in three sampling sites in the Pintuyacu stream, a tributary of the Itaya River basin, in the Peruvian Amazon. Based on 504 individuals analyzed, 117 species were identified, corresponding to 33 families and 8 orders. The most diverse order was Characiformes (65 species, 55.6%), followed by Siluriformes (31 species, 26.5%). At the Characidae family level, it presents the highest species richness with 24 species (20.5%). The most abundant species were Stethaprion erythrops (13.1%, 66 individuals), Knodus smithi (13.1%, 66 individuals) and Bujurquina peregrinabunda (6.2%, 31 individuals). Species for ornamental and consumer use were recorded. No threatened species were recorded and most were classified as Least Concern (LC), according to IUCN criteria. The present study is the first to present ...

Trichopodus trichopterus (Pallas, 1770) es una especie nativa del sudeste asiático que se introdujo en el Perú como un controlador biológico de los vectores de la malaria y para la ornamentación. Teniendo en cuenta que las especies hospedadoras exóticas pueden co-introducir sus parásitos en ambientes naturales, el presente estudio tiene como objetivo identificar los monogenoideos que parasitan las branquias del gourami de los tres puntos, dando una descripción morfológica de sus especies de parásitos y sus índices parasitológicos. Treinta especímenes de T. trichopterus fueron capturados en julio de 2018 de un estanque natural en Iquitos, Perú. Las muestras se sacrificaron y luego se analizaron en el Laboratorio de Parasitología y Sanidad Acuícola del Instituto de Investigaciones de la Amazonía Peruana (IIAP), Iquitos, Perú. Se encontró al monogenoideo Trianchoratus acle...

Poecilia reticulata (Peters, 1859), popularly known as the guppy, is a small fi sh commonly confined to the shallow edges of pools and streams and also found in heavily polluted water bodies. In natural and artificial environments, this fish species can be infected by a wide range of pathogens and parasites. In the present study, we reported for the first time in the Peruvian Amazon, the infestation of metacercariae of Clinostomum marginatum (Rudolphi, 1819) in the body of specimens of P. reticulata. Between May and June 2024, fifty specimens of P. reticulata were collected from an urban stream in the city of Iquitos, Loreto, Peru. Samples were collected at the “Laboratorio de Parasitolog.a y Sanidad Acuícola” from the “Instituto de Investigaciones de la Amazon.a Peruana” (IIAP) in Loreto, Peru. Metacercariae of C.marginatum were observed embedded in the muscle tissue of 100% of...

Proyecto Aplicación de marcadores moleculares (Barcoding y Metabarcoding) en la caracterización de peces ornamentales y de consumo de la Amazonia peruana (PIAP-2-P-098-14).