Juan Gabriel Albornoz-GarzónUniversity of Michigan | U-M · Department of Ecology and Evolutionary Biology
Juan Gabriel Albornoz-Garzón
M.Sc.
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30
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Introduction
Skills and Expertise
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Education
March 2015 - June 2018
March 2008 - October 2014
Publications
Publications (30)
The ichthyological collection of the Unillanos Natural History Museum (MHNU-I) is the first fish collection of the Colombian Orinoquia. The collection harbors 78 806 specimens in 3229 lots, collected between 2012 and 2019, representing 10 orders, 42 families, 170 genera, and 272 species, coming mostly from freshwater environments of the Orinoco Riv...
La colección ictiológica del Museo de Historia Natural Unillanos (MHNU-I) es la primera colección de peces de la Orinoquia colombiana. La colección alberga 78 806 especímenes en 3229 lotes, recolectados entre 2012 y 2019, que representan 10 órdenes, 42 familias, 170 géneros y 272 especies, provenientes en su gran mayoría de ambientes dulceacuícolas...
Creagrutus affinis is a trans-Andean species occurring along different basins in Panamá
and Colombia. The purpose of the present study is to expand its distributional range into the Río
San Jorge basin, Colombia. The specimens studied were identified on the basis of a morphological
comparison using descriptions, modern keys and comparative material...
Catfishes of the family Astroblepidae form a group composed by 82 valid species of the genus Astroblepus inhabiting high-gradient streams and rivers throughout tropical portions of the Andean Cordillera. Little has been advanced in the systematics and biodiversity of astroblepids other than an unpublished thesis, a single regional multilocus study...
An annotated list of the freshwater fishes of the Río Alvarado drainage, Upper Río Magdalena Basin is presented. Fishes were captured from nine localities, quarterly sampled between September 2012 and July 2013. A total of 36 species belonging to 14 families, distributed in five orders were collected. The most abundant species was Trichomycterus ba...
DESDE 1995 LAS COLECCIONES BIOLÓGICAS DEL INSTITUTO HUMBOLDT HAN TRABAJADO PARA LLEGAR A SER HOY EL SEGUNDO REPOSITORIO DE BIODIVERSIDAD MÁS GRANDE Y REPRESENTADO POR SU TIPO, CONVIRTIÉNDOSE EN UNA HERRAMIENTA PARA RESPONDER A LOS DESAFÍOS EN CONSERVACIÓN, GENÉTICA Y EDUCACIÓN DESDE LA INVESTIGACIÓN Y DOCUMENTACIÓN DE LA BIODIVERSIDAD.
A new species of Creagrutus is described from the Amazonian Piedmont, Colombia. The new species can be distinguished from congeners by presenting the following unique combination of characters: a dark mid-lateral stripe starting at anteriormost scale of lateral line, a vertically elongated humeral blotch, absence of dark blotches on dorsal fin and...
A new species from rapids of Rio Aripuanã, Rio Madeira basin, in Brazil, and from the same type of habitat in the upper Rio Negro and upper Rio Orinoco basins in Brazil, Colombia, and Venezuela is described and assigned to the genus Hyphessobrycon. The new species presents an interrupted lateral line plus a single perforated scale on caudal peduncl...
A new species of Pristella is described from the Río Meta drainage, Río Orinoco basin, Colombia. Pristella ariporo, new
species, is described as the second known species of the genus and differs from P. maxillaris by lacking maxillary teeth,
possessing all teeth of premaxilla and dentary conical, by the absence of a dark blotch on the pelvic fin an...
A new species of Pimelodella is described from northern coastal drainages of the Sierra Nevada de Santa Marta (SNSM), Colombia. The new species is diagnosed from all trans-Andean congeners by the following unique combination of characters: head length 22.2–23.7% SL, bony interorbital width 17.6–21.6% HL, maxillary barbels length 53.0–68.3% SL, inne...
A new species of Hemigrammus is described from the Amazon Basin near Leticia, Departamento Amazonas, Colombia. In common with some congeners and some Hyphessobrycon spp., the new species colour pattern lacks a humeral blotch but has a caudal‐peduncle blotch. It can be distinguished from congeners with a similar colour pattern by having: a relativel...
Tatia caudosignata, new species, is described from terra firme streams of the Colombian Amazon. The new species is distinguished from congeners by its unique coloration pattern consisting of dorsal region of head and body cloaked in dark pigment, fading to pale towards ventral region; dorsal fin almost completely dark (excepting distal margin and l...
DNA barcoding has been used as a universal tool for delimiting species boundaries in taxonomically challenging animal groups and currently appear to be a method in systematic studies. Additionally, the growing of methods to analyze multilocus datasets in the coalescent-based framework has provided better resolution of species limits in cases of cry...
The monotypic Astroblepidae fish family includes 81 species distributed along Central and Northern Andes in South America and Panamá in Central America; most aspects regarding its biology, taxonomy, and chromosomal features remain largely unknown. This study reports the karyotype of two sympatric Astroblepus species from the Colombian Andes, aiming...
The Neotropical family Scoloplacidae is a monogeneric group of miniature freshwater catfishes that includes 6 species. Scoloplax dicra has the widest distribution across the Amazon basin, except in the western upper portions. We collected 3 specimens from localities close to Leticia in Colombia, corresponding to S. baileyi and S. dicra , constituti...
A new species of Creagrutus is described from several localities in the upper Río Magdalena drainage, Colombia. Creagrutus dulima n. sp. differs from all trans-Andean congeners by the combination of a relatively small orbital diameter, the shape and position of hooks on the pelvic-fin rays, in having the third infraorbital not in contact with the p...
Hemibrycon iqueima sp. nov., is described from small streams in the Magdalena drainage at the foothills of the western slope of the Eastern Cordillera of the Colombian Andes, Suarez municipality, Tolima Department, Colombia. The new species is distinguished from its congeners in the Magdalena–Cauca River basin by a combination of characters related...
La Autoridad Nacional de Acuicultura y Pesca (AUNAP), en cooperación con la Universidad del Tolima, ejecutó el monitoreo biológicopesquero durante el segundo semestre de 2016, identificando los sitios de pesca, las unidades económicas
(embarcaciones, artes, pescadores) y su eficiencia, así como el perfil socio- económico de las comunidades de pesca...
Malacoglanis gelatinosus, a species of miniature catfish of the family Trichomycteridae, is only known from 4 specimens from the Amazon basin. Recently, we collected 3 specimens from the upper basin of the Meta River, a tributary of the Orinoco. This is the first record of M. gelatinosus from the Orinoco river basin, which significantly expands the...
Ecomorphological patterns of the fish community were evaluated in the trans-Andean Alvarado River drainage, Colombia. A total of 29 species using 25 ecomorphological indices were analyzed to test how well the ecomorphological patterns are related to the fish assemblage. Although a significant correlation was found (Mantel test) between morphologica...
The distribution of Microgenys minuta (Characiformes, Characidae) is expanded to include the area from the
mid-upper section of the Cauca River and the high stretch of the Magdalena River to the middle portion of
the Magdalena River Basin, based on specimens collected in piedmont streams of Santander Department,
Colombia.
This study reports the expansion of the known distribution of the invasive fish Xiphophorus maculatus (Günther, 1866) into the upper Magdalena river basin. The new record comes from a wetland in the Dry Tropical Forest biome in Tolima and represents the first collection of this species from the upper Magdalena river basin. An updated distribution f...
Omacha Foundation researchers, universities Quindio, Tolima, Amazon and the National Parks, held from 3rd to 11th July, the expedition to the Caquetá River and tributaries such as Yari, Mirití, goal, Cahunarí and pipes Solarte and San Francisco. The objectives of the research was the estimation of densities and population size for river dolphins In...
In Colombia a dam, Betania Reservoir, has been constructed on the main cannel of the Magdalena River, and another, the El Quimbo Hydroelectric Project which is located upstream of the first, is under construction. The dams not only generate fragmentation processes in the aquatic ecosystems, but also create artificial hybrid systems that impact the...
Se han descrito siete especies transandinas del género Pimelodella, de las cuales sólo Pimelodella chagresi (Steindachner, 1876) se distribuye en el Alto Magdalena. Este análisis preliminar intenta determinar si existen variaciones morfométricas entre las poblaciones de P. chagresi que habitan las principales cuencas hidrográficas del departamento...
Questions
Questions (4)
I need the book Rohlf, F. J. & Sokal, R. R (1995). Statistical tables, 3rd edn. New York: W. H. Freeman. Could anyone help me?
Anyone could facilitate me the critical values table for the one-sample Kolmogorov-Smirnov intrinsic hypothesis from Rohlf and Sokal 1995?
I have read little about the CDI but not found much information available, does someone have information or references?
I do not know what technique is most useful to assess the anthropic activities effect in lotic ecosystems .