Junior Chuctaya- Blgo Msc PhD
- Posdoc at Federal University of Uberlândia
Junior Chuctaya
- Blgo Msc PhD
- Posdoc at Federal University of Uberlândia
About
53
Publications
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353
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Introduction
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March 2017 - February 2021
Publications
Publications (53)
We mapped the inferred long-distance migrations of four species of Amazonian goliath catfishes (Brachyplatystoma rousseauxii, B. platynemum, B. juruense and B. vaillantii) based on the presence of individuals with mature gonads and conducted statistical analysis of the expected long-distance downstream migrations of their larvae and juveniles. By l...
A new species of Odontostilbe is described from the rio Jaciparaná, rio Madeira basin, Rondônia, Brazil. Odontostilbe pacaasnovos differs from all its congeners, except O. pequira, by the colour pattern. Additionally, it differs from its congeners by the terminal mouth, number of cusps in the teeth of the premaxilla (5–7), number of branched rays i...
![PCA between sex [male (circles), female (squares)] for Pseudocorynopoma...](publication/344434744/figure/fig4/AS:11431281245801347@1716256875134/PCA-between-sex-male-circles-female-squares-for-Pseudocorynopoma-heterandria_Q320.jpg)
Species delimitation is a permanent issue in systematics. The increasing recognition of geographically isolated populations as independent lineages allowed by new methods of analysis has inflated the species‐populations dilemma, which involves deciding whether to consider separate lineages as different species or structured genetic populations. Thi...
Prodontocharax species are revised and the genus Amblystilbe is revalidated based on analysis of type-material and additional specimens. Both genera are diagnosed based on unique synapomorphies among members of the Cheirodontinae related to shape, size, number and arrangement of teeth in the jaw bones. Prodontocharax melanotus, from the upper rio M...
A new species of Corydoras is described from the Itaya and Nanay river basins, tributaries of the Río Amazonas in Peru. The new species can be distinguished from its congeners by the following features: (I) branch of the temporal sensory canal at sphenotic, which gives rise to the supraorbital canal, with two pores, (II) upper tooth plate of branch...
Quantitative traits are a source of evolutionary information often difficult to handle in cladistics. Tools exist to analyse this kind of data without subjective discretization, avoiding biases in the delimitation of categorical states. Nonetheless, our ability to accurately infer relationships from continuous characters is incompletely understood,...
The transition from the Andes to the Amazon lowland hosts a high biodiversity and currently is facing several anthropogenic activities, including hydropower infrastructure projects. Little is known about the geomorphology of the Andean gorges, rivers and the interaction with the fish diversity upstream and downstream of gorges. The Marañón River is...
This study focuses on the genus Chrysobrycon , particularly Chrysobrycon mojicai , which was initially described in the Amacayacu National Natural Park in Colombia. Here, we document a new geographical record of C. mojicai in various locations of the Peruvian Amazon, including the Nanay, Putumayo, Tapiche, and Tigre Rivers basins. Based on morpholo...
[This corrects the article DOI: 10.1371/journal.pone.0287120.].
Length-weight relationship (LWR) studies are important for fish taxonomical analysis, ecological assessments, management, and conservation practices. Although LWR studies can use measurements of either fresh or preserved specimens, few studies have directly compared these methods. This study analyzed the effect of preservation on LWR of ten small-s...
En 2023, se describieron 242 nuevas especies de peces en el mundo, incluyendo un corydoras, un bujurqui y varias mojarritas, según el catálogo de peces de Eschmeyer, la principal base de datos para nombres científicos y estatus taxonómico de peces, dirigida por Ron Fricke, William Eschmeyer y Jon David Fong. Estas especies se distribuyen en América...
A checklist of recent and fossil fishes of the Order Characiformes is presented herein and believed to be complete through 2022. A total of 47 collaborators checked and provided information about their taxa of expertise. The list is arranged in alphabetical order by family and then genus and includes all available synonyms. From a total of 3,087 sp...
A checklist of recent and fossil fishes of the Order Characiformes is presented herein and believed to be complete through 2022. A total of 47 collaborators checked and provided information about their taxa of expertise. The list is arranged in alphabetical order by family and then genus and includes all available synonyms. From a total of 3,087 sp...
Quantitative traits are a source of evolutionary information often difficult to handle in cladistics. Tools exist to analyze this kind of data without subjective discretization, avoiding biases in the delimitation of categorical states. Nonetheless, the ability of continuous characters to accurately infer relationships is incompletely understood, p...
The study focuses on the Huachana lake, a vulnerable ecosystem in the Peruvian Amazon region that receives wastewater from the city of Iquitos. Despite its significance in ichthyology and its role as a type locality for various species, water bodies near Iquitos face threats. While a portion of the ichthyological diversity in the Loreto region is k...
Rhyacoglanis pulcher is a rare Neotropical rheophilic bumblebee catfish known only from the type locality in the Cis-Andean Amazon region, Ecuador, and the type-species of the genus. So far, the three syntypes collected in 1880 were the only specimens unambiguously associated to the name R. pulcher available in scientific collections. Recently, a s...
En este trabajo se presenta una lista actualizada de los registros de especies de peces de la cuenca del río Ucayali, Perú, provenientes de datos publicados y no publicados. Los resultados muestran que la cuenca del Ucayali presenta una ictiofauna rica y diversificada con el registro de 734 especies distribuidas en 15 órdenes, 49 familias y 292 gén...
A new species of Geophagus sensu stricto is described from the Tapajos River basin, Brazil, elevating the number of species of the genus to 21. The new species is of commercial importance and is known in the aquarist trade as Geophagus ‘red head’. The new species is diagnosed using an integrative approach, based on mitochondrial DNA analysis along...
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 departme...
Two specimens of Micromyzon akamai, an eyeless and miniaturized species previously known only from the deep channels of the eastern Amazon basin in Brazil, are reported from the Curaray River, a tributary of the Napo River in Ecuador. The new specimens are the first records of Micromyzon in the headwaters of the Amazon River and the first records o...
This book provides comparative data on fish ecology and small-scale fisheries between Tapajos (clear water) and Negro (black water) rivers, in the Brazilian Amazon. These rivers are less studied than white water rivers and few books on Amazon fishes have addressed more than one river basin. These data can serve as a baseline to check future changes...
This book provides comparative data on fish ecology and small-scale fisheries between Tapajos (clear water) and Negro (black water) rivers, in the Brazilian Amazon. These rivers are less studied than white water rivers and few books on Amazon fishes have addressed more than one river basin. These data can serve as a baseline to check future changes...
This book provides comparative data on fish ecology and small-scale fisheries between Tapajos (clear water) and Negro (black water) rivers, in the Brazilian Amazon. These rivers are less studied than white water rivers and few books on Amazon fishes have addressed more than one river basin. These data can serve as a baseline to check future changes...
• Assessing the effectiveness of protected areas for sustaining species and identifying priority sites for their conservation is vital for decision making, particularly for freshwater fishes in South America, the global centre of freshwater fish diversity. Several conservation planning studies have used threatened freshwater fishes or species that...
Cynopoecilus, assim como as espécies de Campellolebias, possuem modificações nos primeiros raios da nadadeira anal dos machos, que possivelmente estão relacionadas à inseminação (Costa et al., 2016). Cynopoecilus é endêmico de uma vasta área do sul do Brasil e nordeste do Uruguai, sendo a maioria das espécies encontradas em formações abertas de pas...
Acipenser gueldenstaedtii is a species of sturgeon described from Caspian Sea and Black Sea and their tributaries, occurring in the Eastern Atlantic, Europe and Middle East. This and other two sturgeon species have been accidentally introduced in the Rio Negro, Uruguay, a tributary of the Rio de La Plata. Recently, it has been demonstrated the pres...
A new species of Bryconops is described from upper rio Juruena drainage, rio Tapajós basin, Amazon basin, state of Mato Grosso, Brazil. The new species is hypothesized as belonging to the subgenus Creatochanes by presenting the posterior extension of maxilla reaching to the junction of second and third infraorbital bones, and the ventroposterior ma...
Specimens historically identified as Odontostilbe microcephala from the upper rio Paraná and Andean piedmont tributaries of the río Paraguay are reviewed and split in three species. We found that the distribution of O. microcephala is restricted to the Andean slope of the río Paraguay basin. The species is distinguished from congeners with subtermi...
The first occurrence of Phallotorynus victoriae is reported from the Uruguay river basin associated with the grasslands of the Pampa Biome, southern Brazil. The record includes only one specimen from a tributary to Ibicuí River located in the municipality of Uruguaiana, Rio Grande do Sul state. Citation: Chuctaya JA, Donin LM, Vieira CS, Faustino-F...
Orestias Valenciennes 1839 pertence à
família Cyprinodontidae Gill, 1865, endêmico dos sistemas
aquáticos do Altiplano andino entre os países de Perú, Bolivia
e Chile, desde o lago Lacsha nos andes centrais do Peru
até o Salar de Ascotán no Norte de Chile (Parenti, 1984;
Costa, 2003; Ortega et al., 2012; Cruz-Jofré et al., 2013). O
gênero inclui 45...
Length–weight relationships (LWRs) for 23 freshwater fish species from the Andean Amazon piedmont in Peru are presented in this study. Fishes were captured between 2009 and 2010 on lagoons from three basins; Amazonas (Ampiyacu and Apayacu) and Ucayali (Pachitea) using gillnets. In this study, new LWRs are reported for 20 species of 23 species analy...
The morphometric relationships of three native and one exotic freshwater fish species from the Lower San Juan and Lower Pisco River basins, central Coast of Peru, are presented. Specimens were collected in May and November 2010 using seine nets and electrofishing. Length-Weight (LWR) relationships for Andinoacara stalsbergi, Trichomycterus punctula...
http://inambari.org/
WCS trabaja en la conservación de paisajes desde una visión de gestión integrada del territorio, buscando abordar los impactos acumulativos de grandes proyectos de inversión con información técnica basada en investigación científica. En este marco, presentamos un estudio de caso llevado a cabo en la cuenca del río Inambari (su...
El agua es considerada como uno de los recursos naturales más esenciales para la vida. Esto se ve relejado en el hecho de que el agua es el elemento común a la mayoría de los Objetivos de Desarrollo Sostenible de las Naciones Unidas. Así, el agua conecta la salud pública, la seguridad alimentaria, la energía para todos, el bienestar del medio ambie...
This species is listed as Vulnerable because it has a very restricted distribution (known only from two locations) and there is the potential for mining activities and construction of dams that may drive it to CR or EX in the near future.
Although this species has a very restricted distribution, it occurs in a remote and well-preserved area and there are no known major threats affecting it. Therefore, it is listed as Least Concern.
This species is listed as Vulnerable because it has a very restricted distribution (known only from one location) and there is the potential for mining activities and construction of dams that may drive it to CR or EX in the near future.
This species is listed as Data Deficient because the locality where the species was originally collected is uncertain
Although this species has a very restricted distribution, its population is presumed to be stable and there are no known major threats affecting it.
This species has a very restricted distribution (area of occupancy (AOO) = 9 km²) and it occurs at only one location that is being affected by deforestation for livestock raising, which is causing a continuous decline in the quality of its habitat due to erosion and sedimentation. The species is also being collected for the ornamental trade, sugges...
This species is listed as Least Concern because it is widely distributed, is locally abundant, there are no major threats affecting it, and also occurs in many protected areas.
This species is listed as Least Concern because its population is presumed to be stable and there are no known major threats affecting it.
This species is assessed as Least Concern because it has a wide distribution, is common, and there are no known major threats currently affecting it.
This species is listed as Least Concern because it is widely distributed, is common, is present in
protected areas and because there are no major widespread threats currently affecting its population.
During 16 days of fieldwork we evaluated 35 sampling stations in three types of habitats (rivers, streams and lakes), comprising an area extending from the town of Iberia to the control and surveillance post of the Alto Purus National Park located in the limit of the Madre de Dios Territorial Reserve. Of all stations evaluated, 26 were in lotic env...
Según el Taller participativo realizado con los Pescadores Artesanales de Iberia, denominado “Problemática y Soluciones a la Pesca Artesanal en el Río Tahuamanu”, los principales problemasde la actividad pesquera artesanal en la cuenca del río Tahuamanu fueron: en el Tema de Control y Vigilancia la existencia de pescadores ilegales, la falta de con...
El Pongo de Manseriche es como una puerta por donde toda el agua del río Marañón pasa desde los Andes en dirección a la selva amazónica.
The Peruvian Amazon has one of the highest concentrations of aquatic biodiversity in the world, with almost 1,000 fish species currently known, and more described every year. This book shows 502 images representing 274 fish species from the Alto Purús National Park, a remote wilderness area located in the Fitzcarrald region of southeastern Peru. Sp...
Questions
Questions (2)
When sequencing a marker such as COI, sequences with different size of base pairs are obtained.
After aligning the sequences, it is observed that some sequences extend in the 3'-direction and in other cases in the 5'-direction.
What is the best way to carry out a phylogenetic analysis? Perform the analysis using the original size of the sequences, keeping as much information as possible and completing the information of the short sequences with "?".
Or cut the sequences is recommended and perform an analysis using as information, sequences of the same size.
Can you recommend an article that talks about this?
After taxonomic revision of a genus X that is distributed in South America, a researcher sinonimizes all the species in a single species X, that has the lost HOLOTYPE, and designates a NEOTYPE of a locality (Peruvian Amazonia) very far from the type locality (coastal river , in southern Brazil) and further studies conclude that the NEOTYPE does not correspond to species X. Does anyone have a similar experience, or do they know cases of Neotype correction?
Thank you
