Larissa Sbeghen Pelegrini

• PhD
• PhD at Federal University of Amazonas

A total of 30 specimens of Mylossoma aureum and 30 of Mylossoma duriventre from the Middle Madeira River Basin were examined between October 2020 to March 2021. Eight species of parasites were identified. About 65% of the hosts were parasitized. A total of 386 parasites was collected in M. aureum and 436 in M. duriventre. Species accumulation curve...

Studies on the production of Pimelodidae catfsh in the Amazon are generally carried out in large fshing centers. However, the data referring to small-scale fsheries have gaps that can represent a risk to the activity. Tis study evaluated the volume produced and the revenue obtained from migratory catfsh of the Pimelodidae family of commercial inter...

Oncoceratiumn. gen. is proposed to accommodate Oncoceratium amphidactylumn. gen. n. sp. (Monogenoidea, Gyrodactylidae). Although the proposed genus is monotypic, the differences presented in the diagnosis clearly establish it as distinct from species from other genera, such as Gyrodactylus von Nordmann, 1832 and especially those that occur exclusiv...

Here, we evaluate the relationships between the infestation rates of five monogenean parasites species with the dry and wet seasons, with the organic and inorganic parameters of the water of two rivers: the Jacaré-Pepira and Jacaré-Guaçú, and with the condition factors of its fish hosts: Serrasalmus maculatus and Astronotus crassipinnis, in the sta...

Raphidascarid nematodes have been the focus of several studies, mainly due to the zoonotic potential of some species, even though the cases are underreported. Due to the difficulty in identifying their larvae, the use of diagnostic techniques involving morphological and molecular analyses has grown in the last 20 years. The present study had as obj...

A new species of Phanerothecium Kritsky & Thatcher, 1977 (Oogyrodactylidae Harris, 1983) is described from locariid fish from southeast Brazil. Phanerothecium macrosomum n. sp. (Oogyrodactylidae) is described from the body surface of Hypostomus regani (Ihering, 1905) (Loricariidae). It is characterized by an armed male copulatory organ containing s...

We recorded the parasitic fauna of Hoplias malabaricus in a Neotropical River from southeastern Brazil, the Jacaré-Pepira River, in the Tietê-Batalha River Basin. The objective of this study was to inventory the composition of the parasitic fauna of H. malabaricus collected, through ecological and biodiversity approaches. A total of 30 specimens of...

A total of 53 tamboatás, Hoplosternum littorale, from the Batalha River, São Paulo, southeastern Brazil, were examined between February 2014 to December 2016. Seventeen species of parasites were identified, and 961 specimens were collected. The richness of each community varied from one to seven species of parasites per fish. The metacercariae of D...

The Amazon is very important regarding the continental extractive fishing as it has the greatest diversity of freshwater fish in the world. Some factors can contribute to identify significant changes in fish production, such as characterization based on common names, and synonyms or classifications only at the genus level. This creates noise in dif...

This paper details and discusses a helix-induced injury to the right anterior shell of a seemingly healthy subadult loggerhead turtle. On 10 September 2018, two of the authors (JBB and JPB) located a loggerhead sea turtle resting on the rocky reef bottom at a depth of about 10 m while freediving off the southeastern coast of Terceira Island, Azores...

Ichthyological collections are an information center for biological materials that put together assemblages of fishes collected and studied for scientific research, being essential for the knowledge of species biodiversity in certain regions. The present study analyzed the current state of knowledge about the fish fauna found through research, fiel...

We analyzed the distribution and ecological relationships in the parasitic infracommunities of four species of the genus Hypostomus: Hypostomus regani, Hypostomus strigaticeps, Hypostomus hermanni, and Hypostomus ancistroides, collected in the Batalha River, State of São Paulo, Brazil. Twenty-four parasite taxa were identified among myxozoans, mono...

Diversity, similarity, and host-parasite relationship in parasitic 13 infracommunities of Hypostomus spp. from the Tietê-Batalha river 14 basin, southeastern Brazil 15 Here we analyze the distribution and ecological relationships in the parasitic 16 infracommunities of four species of the genus Hypostomus: Hypostomus 17 regani, Hypostomus strigatic...

O jundiá, Rhamdia quelen, é um dos Siluriformes mais importantes da região neotropical, principalmente devido ao crescente interesse comercial nesta espécie. Por conta disso, realizou-se no presente estudo uma análise parasitológica de jundiás da bacia do Tietê-Batalha, no interior do estado de São Paulo. Foram coletados 10 exemplares de R. quelen...

Se realizó la identificación molecular de larvas de nemátodos en el tercer estadío del Scomber colias Gmelin, 1789 recogidos en la costa norte de Argentina, y la caracterización morfológica y morfométrica de estos parásitos. Los órganos internos y los músculos de 31 muestras de S. colias fueron analizadas. La identificación genética de larvas se re...

Eighty-one Hoplias malabaricus specimens were collected between February 2014 and June 2016. A total of 29 species of metazoan parasites were found, 13 of which were identified as monogeneans, seven were digenean species, seven of which were nematodes, and two of which were from the subclass Hirudinea. The highest prevalence values were presented b...

A new species of Tereancistrum Kritsky, Thatcher & Kayton, 1980 collected of Prochilodus lineatus gills from the Batalha River, Tietê-Batalha basin, São Paulo State, Brazil is described. The new species can be distinguished from its congeners mainly by the configuration of the ventral bar, which has an anvil-shaped characteristic with corrugated an...

The Diplostomidae include a large group of flatworms with complex life cycles and are frequently found parasitizing the eyes and central nervous system of freshwater fishes. The morphological identification of the metacercariae at species level is not always possible. Thus, molecular tools have become essential to assist in the parasite species det...

Henneguya guanduensis was originally described as a gill parasite of the Hoplosternum litoralle, a siluriform fish belonging to the Callichthyidae family. A study was undertaken with 58 specimens of H. litoralle taken from Batalha River in the state of São Paulo. The fish were collected and examined searching for lesions and/or myxosporean plasmodi...

Biodiversity of fish parasites is a field of significant growth worldwide, whether due to the advancement of fish farms or the important role of these organisms as indicators of environment quality and ecosystem health, making them useful tools in the conservation and maintenance of the biodiversity as a whole. The objectives of this study were to...

The parasitic biodiversity of the Loricaria prolixa, an endemic fish from the Paraná and Prata basins was studied and analyzed the parasitic’s communities dynamics and their ecological relations with this host. Samples were collected in the Batalha River and 39 specimens were analyzed from 2014 to 2016. All fishes were parasitized. The component co...

The present study analyzes the parasites diversity present in fish species of the order Siluriformes, collected during the years 2014 to 2016 in the Batalha River, Tietê-Batalha river basin (BH-TB), in the Central-West Region of the State of São Paulo. Parasites of aquatic organisms, particularly those parasitizing fish, are underestimated as to th...

Keywords: chub mackerel – fish parasites – genetic identification – polymerase chain reaction – South America – zoonotic potential We performed the molecular identification of nematode third-stage larvae parasites of Scomber colias Gmelin, 1789 collected on the northern coast of Argentina, and described the morphological and morphometric features o...

This paper describes the occurrence of digenetic Rhipidocotyle santanaensis Lunaschi, 2004 in Brazil. This parasite was found in the liver, heart, gonads, intestine, pyloric caeca, stomach, swim bladder and cavity of Acestrorhynchus lacustris (Lütken, 1875) from the Batalha River, São Paulo State, with higher incidence in gonads and digestive tract...

We collected 32 specimens of peixe-cachorro, Acestrorhyncus lacustris (Lütken, 1875), in a stretch of the Batalha River where there is the formation of a water catchment pond used to supply the local human population, on the boundary between the cities of Bauru and Piratininga, SP, from May to September 2013 aiming to conduct a qualitative and quan...

Geophagus brasiliensis is a freshwater cichlid distributed throughout the whole South America. It is a territorial fish, generally omnivorous, which preferentially inhabits the bottom of water bodies. Previous studies have reported species of digenetic trematodes parasitizing G. brasiliensis. This study identifies the Sphincterodiplostomum musculos...

From March to April 2010, specimens of Acestrorhynchus lacustris were collected in the Peixe River, Anhembi, São Paulo State, Brazil. This characid, commonly known as peixe-cachorro, has a preference for lentic habitats and it features carnivorous habits, with an important role in the food chain. This study aimed to carry out a parasitological anal...

Quantitative parameters of metazoan parasites fauna of digestive tract of Osteoglossum bicirrhosum (Cuvier, 1829), from Central Amazonia, Brazil Arowana (Osteoglossum bicirrhosum) is distributed throughout the Amazon River basin. It can reach 1 m in length and about 3 kg. It is considered a generalist predator that leaps from the water to capture i...