Papers by Noé U de la Sancha
Urban Rats ( <i>Rattus norvegicus</i> ) through a One Health Lens: Social and Ecological Factors Promote Opportunities for Urban Leptospirosis in Rats, Dogs, and People
One health cases, Jan 31, 2024
New progress in exploring the mechanisms underlying extraordinarily high biodiversity in global hotspots and their implications for conservation
Diversity and Distributions, Nov 29, 2022
BMC Ecology and Evolution
Background The speckled-pelage brush-furred rats (Lophuromys flavopunctatus group) have been diff... more Background The speckled-pelage brush-furred rats (Lophuromys flavopunctatus group) have been difficult to define given conflicting genetic, morphological, and distributional records that combine to obscure meaningful accounts of its taxonomic diversity and evolution. In this study, we inferred the systematics, phylogeography, and evolutionary history of the L. flavopunctatus group using maximum likelihood and Bayesian phylogenetic inference, divergence times, historical biogeographic reconstruction, and morphometric discriminant tests. We compiled comprehensive datasets of three loci (two mitochondrial [mtDNA] and one nuclear) and two morphometric datasets (linear and geometric) from across the known range of the genus Lophuromys. Results The mtDNA phylogeny supported the division of the genus Lophuromys into three primary groups with nearly equidistant pairwise differentiation: one group corresponding to the subgenus Kivumys (Kivumys group) and two groups corresponding to the subge...
A solution to the challenges of interdisciplinary aggregation and use of specimen-level trait data
iScience
A Content Analysis of the Implementation of Biological Corridor Networks
University of Wisconsin-Superior McNair Scholars Journal, 2001
This paper compares the implementation strategies of five major biological corridor networks in N... more This paper compares the implementation strategies of five major biological corridor networks in North and Central America using six criteria based on their believed contribution to the long–term sustainable success of the corridors. The criteria used for comparison are biological, educational, economic, treatment of indigenous people, political, and the use of media campaigns. Of these the biological component is the strongest in all of the networks. The treatment of indigenous people needed the most work. Except for the Yellowstone to Yukon and the Mesoamerican Corridor, little if any attention has been devoted to the development of a job market, which creates high quality jobs for local people and at the same time works to advance the ideal of implementing a biological corridor system.
Using graph theory on the highly fragmented Atlantic Forest of eastern Paraguay to identify structural connectivity
Scientific Reports, 2021
Additional file 1 of Historical biogeography, systematics, and integrative taxonomy of the non-Ethiopian speckled pelage brush-furred rats (Lophuromys flavopunctatus group)
Additional file 1: Figure S1. The phylogeny of the genus Lophuromys inferred from the Cytochrome ... more Additional file 1: Figure S1. The phylogeny of the genus Lophuromys inferred from the Cytochrome b gene using Bayesian Inference in MrBayes. There were a total of 238 sequences in the analysis, representing all unique haplotypes from the initial alignment of 803 sequences. The numbers above branches represent the percentage posterior probability values. Figure S2. Map showing the type localities (red, green outlined crosses '+') of the non-Ethiopian L. flavopunctatus members, with the corresponding species names labeled in red fonts. The sampling points of samples used in the study are also shown, outlined to illustrate their distribution extents. Figure S3. A Maximum likelihood phylogeny of the non-Ethiopian L. flavopunctatus members inferred from the concatenated mitochondrial genes (Cytochrome b gene + cytochrome oxidase subunit 1) in IQ-TREE. The taxa labels represent the consensus species identities of main OTUs identified by species delimitation. Values above branches ...
Mammalia, 2019
The mammals of Paraguay are still poorly known. We report a new genus for the country, Abrawayaom... more The mammals of Paraguay are still poorly known. We report a new genus for the country, Abrawayaomys, a spiny cricetid rodent endemic for the Interior Atlantic Forest. This record extends the distribution of the genus approximately 100 km, and west of the Paraná River. This addition increases the number of mammals in Paraguay to 184 and verifies that rodents are the most diverse group of mammals in the country. We outline identifying morphological characters of Abrawayaomys and elaborate on the significance of this finding for conservation and biogeography in the region.
Journal of Mammalogy, 2018
Analyses of the dimensions and morphology of spermatozoa can be useful in the identification of m... more Analyses of the dimensions and morphology of spermatozoa can be useful in the identification of mammalian species. We compared and contrasted sperm morphology and dimensions in 9 genera and 18 species of the family Cricetidae. Spermatozoa were obtained from the cauda epididymes of animals previously fixed in 10% formalin, and stained with Giemsa or silver-nitrate staining methods. At least 50 spermatozoa from different specimens were examined for each species. Discriminant function analysis was used to distinguish between the spermatozoa of different species and to identify the best discriminating characteristics. MANOVA revealed that differences between species were significant. Species in the same genus tended to group together. Qualitative characteristics that discriminate between species are discussed. El análisis de las dimensiones y la morfología de los espermatozoides puede ser útil en la identificación de especies de mamíferos. La morfología y dimensiones de espermatozoides (largo y ancho de la cabeza, longitud de la pieza intermedia, pieza principal con la pieza final y longitud total) de 9 géneros y 18 especies de cricétidos fueron comparados y contrastados. Los mismos se obtuvieron de la cola del epidídimo de animales previamente fijados en formalina al 10%, y fueron teñidos con Giemsa o con nitrato de plata. Al menos 50 espermatozoides (de diferentes especímenes) por especie fueron estudiados. El análisis de la función discriminante se utilizó para distinguir entre los espermatozoides de las diferentes especies e identificar las mejores características discriminantes. Una prueba de MANOVA reveló que las diferencias entre especies son altamente significativas. Las especies del mismo género tienden a agruparse juntas. También se discuten las características cualitativas que ayudaron a discriminar entre especies.
Additions to the Paraguayan mammal fauna: the first records of two marsupials (Didelphimorphia, Didelphidae) with comments on the alpha taxonomy of Cryptonanus and Philander
Mammalia, 2015
Even though Paraguay has had a long history of Mammalogy, since 2007, several new rodent, bat, ma... more Even though Paraguay has had a long history of Mammalogy, since 2007, several new rodent, bat, marsupial, and armadillo species have been added to the list of known species for the country. Herein, we add two new species of marsupials to the fauna of Paraguay,
Patterns of small mammal diversity in fragments of subtropical Interior Atlantic Forest in eastern Paraguay
mammalia, 2014
ABSTRACT The deforestation of eastern Paraguay is a relatively recent phenomenon, starting as ear... more ABSTRACT The deforestation of eastern Paraguay is a relatively recent phenomenon, starting as early as the 1940s. Assuming that larger forest fragments retain mechanisms and patterns of biodiversity resembling the original forests, understanding these patterns is valuable for comparative, management, and conservation purposes. In this study, I document diversity patterns in four of the largest reserves of subtropical rainforest in eastern Paraguay as part of a 3-year field study. Forty grids, totaling 31,600 trap nights per reserve, resulted in 19 captured species. Spearman correlations were used to understand effects of distance to edge, and various diversity metrics and multivariate analyses were implemented to compare assemblages between remnants. Trapping revealed an increase in biodiversity toward forest edges. Medium-sized remnants showed the highest diversity (D) and evenness (J). Statistically significant differences were found between and among forest fragments. Given that biodiversity includes both richness and abundances, high biodiversity metrics are not the best indicator for ecosystem &amp;quot;health,&amp;quot; as population explosions closer to edges result in greater biodiversity. More edge, more biodiversity. Thus, more emphasis needs to be given to understanding the natural history of native fauna and common assemblage patterns when addressing conservation and management strategies.
Journal of Chemical Education, 1998
Journal of Chemical & Engineering Data, 1997
Experimental solubilities are reported for anthracene dissolved in ten binary mixtures containing... more Experimental solubilities are reported for anthracene dissolved in ten binary mixtures containing 3-methoxy-1-butanol with 1-propanol, 2-propanol, 1-butanol, 2-butanol, 1-pentanol, 2-pentanol, 3-methyl-1-butanol, 4-methyl-2-pentanol, 1-octanol, and 2-ethyl-1-hexanol at 25°C. Results of these measurements are used to test two mathematical representations based upon the combined nearly ideal binary solvent (NIBS)/Redlich-Kister equation and modified Wilson model. For the ten systems studied, both equations were found to provide an accurate mathematical representation of the experimental data, with an overall average absolute deviation between measured and calculated values being 0.4% and 0.5% for the combined NIBS/Redlich-Kister and modified Wilson equations, respectively.
Journal of Chemical & Engineering Data, 1996
Experimental solubilities are reported for pyrene dissolved in five binary alcohol + cyclohexanol... more Experimental solubilities are reported for pyrene dissolved in five binary alcohol + cyclohexanol and seven binary alcohol + 1-pentanol solvent mixtures at 26°C. Alcohol cosolvents include 1-propanol, 2-propanol, 1-butanol, 2-butanol, 2-methyl-1-propanol, 3-methyl-1-butanol, and 2-pentanol. Results of these measurements are used to test two mathematical representations based upon the combined nearly ideal binary solvent (NIBS)/Redlich-Kister equation and modified Wilson model. For the 12 systems studied, both equations were found to provide an accurate mathematical representation of the experimental data, with an overall average absolute deviation between measured and calculated values being on the order of 0.5%.
Rodentia: los roedores
Los roedores son uno de los grupos de mamíferos más diversos, incluyendo poco más del 42% del tot... more Los roedores son uno de los grupos de mamíferos más diversos, incluyendo poco más del 42% del total de especies vivientes reconocidas actualmente. Estos animales ocupan una gran diversidad de hábitats, con formas que viven en ambientes extremos, como las tundras del Hemisferio Norte, o desiertos andinos sumamente secos, hasta bosques tropicales y praderas templadas. Están presentes en todos los continentes, excepto la Antártida. Su suceso ecológico ha sido atribuido a su dieta oportunista, tamaño generalmente pequeño y propensión a la reproducción. Aunque la mayoría de los roedores son de hábitos cursoriales, otras especies son casi exclusivamente subterráneas y las hay arborícolas y semiaquáticas. Si bien no hay roedores voladores, en el Hemisferio Norte y Asia, algunas ardillas se han especializado en planear entre los árboles. Por regla general, los roedores son omnívoros, pero su espectro de dietas abarca desde la granivoría y herbivoría hasta la insectivoría y carnivoría.Fil: T...
Andean rain shadow effect drives phenotypic variation in a widely distributed Austral rodent
Journal of Biogeography, Aug 31, 2022
Check List, Jun 1, 2010
Notes o N GeoGraphic DistributioN 332 Proceratophrys avelinoi is one of the four species included... more Notes o N GeoGraphic DistributioN 332 Proceratophrys avelinoi is one of the four species included in the P. biggibosa species group, revised by Kwet and Faivovich (2001). The members of this group are characterized by the presence of postocular swellings and the absence of palpebral appendages, accompanied by cryptic, dorsal brownish coloration with red, orange, or tan colored ventral surface which is black spotted (Kwet and Baldo 2003), note many collection specimens loose their ventral coloration. P. avelinoi is a small sized member of this group (Table 1). This species can be identified by its small postocular swelling, light brown coloration on the suprascapular region, and orange reddish blotches on the venter (Figure 1). It is distinguished from P. bigibbosa by the much smaller size, fainter postocular swelling; from P. brauni by the smaller size, rounded snout, and lessdeveloped palpebral tubercles; from P. palustris because P. avelinoi has lighter coloration on the suprascapular region, better defined dorsal row of tubercles, and significantly smaller size in males (Kwet and Faivovich 2001).
Bioindicators of edge effects within Atlantic Forest remnants: Conservation implications in a threatened biodiversity hotspot
Diversity and Distributions, 2023
Andean rain shadow effect drives phenotypic variation in a widely distributed Austral rodent
Journal of Biogeography, 2021
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Papers by Noé U de la Sancha