Claudio Quezada-Romegialli

University of Tarapacá | UTA · Departamento de Recursos Ambientales

The present study combined uniparental mtDNA and biparental SNPs to illuminate the invasion and colonization pathways of rainbow trout, Oncorhynchus mykiss, one of the world's most widespread invasive fishes, that has been intensively propagated in Chile, South America. The specific goals of the study were: (i) to evaluate potential donor populatio...

The Neotropical region hosts 4,225 freshwater fish species, ranking first among the world’s most diverse regions for freshwater fishes. Our NEOTROPICAL FRESHWATER FISHES data set is the first to produce a large-scale Neotropical freshwater fish inventory, covering the entire Neotropical region from Mexico and the Caribbean in the north, to the sout...

The Oxfordian El Profeta Formation in northern Chile was an important place of teleosteomorph or stem teleostean diversification in the southern Paleo-Pacific Ocean. Among the diverse fish fauna recovered in this formation is †Atacamichthys greeni, which exhibits an interesting combination of amiiform and teleostean morphological features. As a con...

The Oxfordian El Profeta Formation in northern Chile was an im- portant place of teleosteomorph or stem teleostean diversification in the southern Paleo-Pacific Ocean. Among the diverse fish fauna recovered in this formation is †Atacamichthys greeni, which exhibits an interesting combination of amiiform and teleostean morphologi- cal features. As a...

Archaeological remains from the prehispanic cemetery Topater-1 (223BC) near Calama were recovered between 1981 and 1985, and among them was a complete individual of silverside fish associated to a piece of ceramic. A recent compilation by Benjamin Ballester and collaborators registers over 20 marine species that formed part of the so called “fish...

Species diagnosis is essential to assess the level of mislabeling or misnamed seafood products such as sushi. In Chile, sushi typically includes salmon as the main ingredient, but species used are rarely declared on the menu. In order to identify which species are included in the Chilean sushi market, we analyzed 84 individual sushi rolls sold as "...

Resumen ejecutivo Los ecosistemas de agua dulce o humedales presentan una enorme diversidad en Chile, desde bofedales, vegas y salares en el norte a bosques pantanosos o hualves, ñadis y turberas en el sur, incluyendo lagos, lagunas, pantanos, ríos, esteros y arroyos, entre otros. Todos ellos tienen en común contar con un cuerpo de agua permanente...

A study including morphological characters and mitogenomics of South American and Australian fishes previously assigned to Percichthyidae was conducted. Results generated from these different data sets reveal major disagreements concerning the content and interpretation of the so-called percichthyids. A phylogenetic analysis based on 54 morphologic...

A new genus and species, Pseudorestias lirimensis, is described from the southern part of the Chilean Altiplano. While sharing several characters that clearly align the new species with Orestias, this new fish is characterized by numerous autapomorphies: the Meckel cartilage is a continuous cartilage that broadly expands posteriorly (in large speci...

Diagram of Pseudorestias lirimensis gen. et sp. now. Illustrating how the body measurements were taken. (DOCX)

Meristic and karyotype characteristics of Pseudorestias lirimensis gen. et sp. nov. compared with species of Orestias inhabiting the Chilean Altiplano. (DOCX)

Raw measurements of Pseudorestias lirimensis gen. et sp. now. (XLSX)

List of species of the tribe Orestiini, new usage of the Chilean Altiplano, with map illustrating their geographical distribution. (DOCX)

Terms of use of Open Topography. The landscapes used in Fig 1A and 1B are from Open Topography, whereas the geographic position of the Lirima village and rivers are from one of the authors (CQR). (DOCX)

Following study of the external morphology and its unmatched variability throughout ontogeny and a re-examination of selected morphological characters based on many specimens of diplomystids from Central and South Chile, we revised and emended previous specific diagnoses and consider Diplomystes chilensis , D. nahuelbutaensis , D. camposensis , and...

La Dirección General de Aguas debe velar por mantener un caudal ecológico mínimo al momento de otorgar los derechos de agua. La metodología utilizada para determinar dicho caudal ecológico es netamente hidrológica, ante lo cual puede carecer de una conceptualización ecológica. En este trabajo se pretende evaluar si dicha metodología presenta un com...

The killifish Orestias ascotanensis is endemic to the small isolated springs of Ascotán salt pan in the Central High Andes, Chile. Due to small populations, mining activity, and increasing aridity, this species is catalogued in danger of extinction. The complete mitochondrial genome of O. ascotanesis was assembled with an Ion Torrent sequencer (chi...

The killifish genus Orestias is endemic to freshwater ecosystems in the High Andes of Peru, Bolivia and Chile. Phylogenetic and phylogeographic studies with partial mitochondrial genes have failed to resolve relationship among species, needing more comprehensive approaches. In this study, we described the complete mitochondrial genome of Orestias s...

Cheilodactylus variegatus is a common benthivorous marine fish inhabiting in rocky subtidal habitats in the eastern south Pacific coast of Chile and Peru. However, its biology and ecology are relatively understudied and its taxonomic assignment has been debated recently. The complete mitochondrial genome was assembled de novo and mapped to a refere...

Abstract The complete sequence of the mitochondrial genome for the Chilean silverside Basilichthys microlepidotus is reported for the first time. The entire mitochondrial genome was 16,544 bp in length (GenBank accession no. KM245937); gene composition and arrangement was conformed to that reported for most fishes and contained the typical structur...

La Dirección General de Aguas en Chile (DGA) establece un caudal ecológico mínimo al momento de otorgar derechos de agua con el fin de mantener la ecología del sistema fluvial. Este caudal ecológico se obtiene mediante métodos exclusivamente hidrológicos, los cuales no necesariamente presentan un fundamento ecológico, por lo tanto, se hace necesari...

La Dirección General de Aguas en Chile (DGA) establece un caudal ecológico mínimo al momento de otorgar derechos de agua con el fin de mantener la ecología del sistema fluvial. Este caudal ecológico se obtiene mediante métodos exclusivamente hidrológicos, los cuales no necesariamente presentan un fundamento ecológico, por lo tanto, se hace necesari...

A total of ten microsatellite loci were isolated and characterized in the endangered freshwater catfish Trichomycterus areolatus from Chile. Samples from three separate watersheds were also analyzed. The mean number of alleles per locus in a sample of 63 individuals was 4 (1–13 alleles per locus) and the observed heterozygosities ranged from 0 to 0...

We tested the amplification potential of 8 microsatellites initially described for Odontesthes perugiae and O. argentinensis in 3 species of Odontesthes and 4 species of Basilichthys. Most of the microsatellites amplified and showed polymorphism; thus they will be useful in genetic conservation plans for these species.

To describe comparative population genetic structure of the Chilean silverside Basilichthys microlepidotus and the catfish Trichomycterus areolatus, four rivers and three sites within each river were investigated by the analysis of haplotype polymorphisms of the mitochondrial Control Region. For both species, analyses revealed significant different...