Checklist of freshwater fishes from Loreto, Peru

Abstract

This study presents an extensive review of published and unpublished occurrence records of fish species in the Loreto department. Located in the northeast of the country, Loreto is the most geographically extensive region in the Peruvian territory. Despite the increase in fish collections in Loreto in recent years, the ichthyofauna of this department needs to be more documented. Based on a database of scientific collections and bibliographic information, an updated checklist of the freshwater fishes from Loreto is presented. The results reveal a rich and diversified ichthyofauna, with 873 species distributed in 331 genera, 50 families and 15 orders. The main groups are Characiformes (42.6%), Siluriformes (34.8%), Gymnotiformes (8.6%) and Cichliformes (7.4%). Part of the ichthyofauna has restricted distribution for Loreto (4.7%). In addition, 9.0% of species from Loreto are used in fisheries. Meanwhile, 219 species (25%) were categorized according to the IUCN criteria where only six species (0.7%) are currently considered threatened species (CR, EN or VU). The results presented in this work indicate that this department needs more studies to know the biodiversity of fish, likewise, the information presented constitutes a contribution to the knowledge of fish diversity that would support environmental management actions and decision-making aimed at conserving one of the most diverse departments of Peru.

Assessing fish diversity in abandoned mining ponds in Madre de Dios, Peru, using environmental DNA

“…Nevertheless, our eDNA‐based analysis was able to detect a total of nine genera and 11 species of fish not found in previous sampling campaigns in any of the sites surveyed (Table 2). From this set, the species Moenkhausia sanctaefilomenae and the genus Ituglanis found in the pristine lakes were not previously reported for Peru (Chuctaya et al., 2022; Meza‐Vargas et al., 2021; Ortega et al., 2012).…”

“…From this set, the species Moenkhausia sanctaefilomenae and the genus Ituglanis found in the pristine lakes were not previously reported for Peru (Chuctaya et al, 2022;Meza-Vargas et al, 2021;Ortega et al, 2012).…”

“…For instance, in our study, we detected the species Moenkhausia sanctaefilomenae (99.06% similarity) and Liosomadoras morrowi (99.04% similarity), and the genus Ituglanis (specifically, the species Ituglanis metae with 100% similarity). These species have never been reported for the Madre de Dios River basin or even for Peru (Dagosta & de Pinna, 2019; Ortega et al., 2012), with the exception of L. morrowi (Chuctaya et al., 2022; Meza‐Vargas et al., 2021). Their finding in this study might possibly be a case of misidentification, considering that most barcode sequences available in genomic databases correspond to fish diversity from the Amazon River near the coastal basins in Brazil, Guyana, and even in the Colombian Orinoco basin (Dr.…”

“…Assignments were made to the lowest possible taxonomic level where there was consistency in the matches, with minimum similarity thresholds of 99%, 97%, and 95% for species, genus, and higher‐level assignments, respectively. Country‐based sense‐checking against GBIF occurrence records was used to manually improve identifications in cases where there were equally good reference matches (rgbif; Chamberlain et al., 2022), as well as the CAS Eschmeyer's Catalog of Fishes database (Fricke et al., 2020), and the reports in Peru (Chuctaya et al., 2022; Meza‐Vargas et al., 2021; Ortega et al., 2012). zOTUs were clustered at 98% similarity with USEARCH to obtain OTUs.…”

PRIMER REGISTRO DE Dianema urostriatum (Miranda Ribeiro 1912) (SILURIFORMES: CALLYCHTHIDAE), EN EL RÍO PUTUMAYO, CUENCA DEL AMAZONAS, PERÚ

“…2001 (ver Littmann, 2007) A pesar que en los últimos años se han intensificado las colectas de peces en la cuenca del río Putumayo (Hidalgo & Oliveira, 2004;Ortega et al, 2006;Hidalgo & Ortega-Lara, 2011;Hidalgo & Maldonado-Ocampo, 2016;Faustino-Fuster et al, 2021), y teniendo en cuenta que la reciente lista de peces de agua dulce referente a la región Loreto no se reporta la presencia de la especie en mención (Meza-Vargas et al, 2021), este nuevo registro para la Amazonía peruana amplia la distribución de Dianema urostriatum, para uno de los mayores afluentes de la cuenca alta del río Amazonas como el río Putumayo después de más de 100 años desde su descripción original. Este nuevo patrón de distribución de esta especie se encaja mejor a las "tierras bajas" exclusiva del Amazonas conforme indicado por Dagosta & de Pina(2019) y también se corrobora con la interpretación de Vari (1988) de que la distribución de algunas especies de curimátidos están vinculada a la distribución ecológica (agua blanca, en este caso) más que por factores históricos.…”