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546,196 artículos
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Año:
2023
ISSN:
2007-3364
Patton, James L.; Museum of Vertebrate Zoology, University of California.; Fisher, Robert N.; U.S. Geological Survey, Western Ecological Research Center.
Asociación Mexicana de Mastozoología A. C.
Resumen
The Little pocket mouse (Perognathus longimembris) encompasses 15 to 16 currently recognized subspecies, six of which are restricted to southern California and adjacent northern Baja California. Using cranial geomorphometric shape parameters and dorsal color variables we delineate six regional groups of populations from this area that we recognize as valid, but these differ in name combination and geographic range from the current taxonomy. We resurrect two names from their current placement in synonymies, synonymize two currently recognized subspecies, and we reassign a third. Importantly, we restrict the U. S. Federally endangered Pacific pocket mouse (P. l. pacificus Mearns) to the vicinity of its type locality at the mouth of the Tijuana River in the southwestern corner of San Diego County and resurrect P. l. cantwelli von Bloeker for the other two population segments along the coast, those that span the northwestern corner of San Diego County and adjacent Orange County and that in coastal Los Angeles County. The name cantwelli would now apply to the only extant populations of the Pacific pocket mouse, a reassignment with obvious management implications. Our taxonomic decisions also reconfigure the ranges of other subspecies of conservation concern, notably P. l. bangsi Mearns and P. l. brevinasus Osgood.
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Año:
2023
ISSN:
2007-3364
Arellano, Elizabeth; Universidad Autónoma del Estado de Morelos; Almendra, Ana L.; Universidad Autónoma del Estado de Morelos; Martínez-Borrego, Daily; Universidad Autónoma del Estado de Morelos; González-Cózatl, Francisco X.; Universidad Autónoma del Estado de Morelos; Rogers, Duke S.; Brigham Young University
Asociación Mexicana de Mastozoología A. C.
Resumen
Reithrodontomys sumichrasti is distributed from central México to Panama. Previous studies using DNA sequences suggest the existence of distinct clades that may deserve species-level recognition. Here, we use multiple methods of species delimitation to evaluate if this taxon is a complex of cryptic species. DNA sequences from the genes Cyt-b, Fgb-I7, and Acp5 were obtained from GenBank to perform molecular analyses. Species boundaries were tested using the bGMYC, STACEY, and BPP species delimitation methods. Divergence times were estimated as well as the Cyt-b genetic distances. We developed Ecological Niche Models and tested hypotheses of niche conservatism. Finally, we estimated the spatiotemporal history of lineage dispersal. The bGMYC proposed two species while STACEY and BPP proposed 4 species (genetic distances ranged from 5.43 % to 7.52 %). The ancestral position of clade I was recovered, with a Pleistocene diversification time within R. sumichrasti at ~2.15 Ma. For clade pairwise niche comparisons, the niche identity hypothesis was rejected. The ancestral distribution of R. sumichrasti was centered in Central America and spread to the west crossing the Isthmus of Tehuantepec and extending to the mountain regions of Central México. Our taxonomic considerations included the recognition of four clades as distinct species within R. sumichrasti.
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Año:
2023
ISSN:
2007-3364
Woodman, Neal; U.S. Geological Survey, Eastern Ecological Science Center. Department of Vertebrate Zoology, National Museum of Natural History, Smithsonian Institution.
Asociación Mexicana de Mastozoología A. C.
Resumen
The Soricidae (Mammalia: Eulypotyphla) comprises more than 450 species inhabiting a variety of habitats on five continents. As a family, shrews employ a variety of locomotor modes that incorporate ambulatory, fossorial, aquatic, and scansorial behaviors, illustrating an ability to exploit a variety of natural substrates and their associated resources. In this study, the association of skeletal morphology and three of the dominant locomotor modes in the family—ambulatory, semi-fossorial, and semi-aquatic behaviors—was investigated in up to 52 species of 12 genera representing all three subfamilies of Soricidae. From skeletal measures, 34 morphological indices were calculated, most of which have been used previously to characterize substrate use among shrews, rodents, and other mammals, and analyzed for their individual effectiveness for discriminating the three locomotory modes. To assess their effectiveness in combination, subsets of locomotor indices were analyzed using 1) mean percentile ranks, 2) the first principal component from principal components analysis, and 3) plots and classifications from discriminant function analyses. In general, the three methods effectively identified and grouped the three locomotor modes and identified smaller subsets. Additional analyses were then used to classify the locomotor behaviors of five species whose locomotor modes were unknown or ambiguous. The analyses reinforce and broaden the scope of a previously identified observation of the wide range of grades of morphological variation that may permit an equally diverse range of locomotor abilities among the Soricidae.
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Año:
2023
ISSN:
2007-3364
Sánchez-Reyes, Monserrat; Departamento de Ecología de la Biodiversidad, Instituto de Ecología, Universidad Nacional Autónoma de México; Chiappa-Carrara, Xavier; Departamento de Sistemas y Procesos Naturales, Escuela Nacional de Estudios Superiores Unidad Mérida, Universidad Nacional Autónoma de México; Vázquez-Domínguez, Ella; Departamento de Ecología de la Biodiversidad, Instituto de Ecología, Universidad Nacional Autónoma de México; Yáñez-Arenas, Carlos; Laboratorio de Ecología Geográfica, Unidad de Conservación de la Biodiversidad, Parque Científico y Tecnológico de Yucatán, Unidad Académica Sisal, Facultad de Ciencias, Universidad Nacional Autónoma de México; Falconi, Manuel; Departamento de Matemáticas, Facultad de Ciencias, Universidad Nacional Autónoma de México; Osorio-Olvera, Luis; Departamento de Ecología de la Biodiversidad, Instituto de Ecología, Universidad Nacional Autónoma de México; Contreras-Díaz, Rusby G.; Departamento de Sistemas y Procesos Naturales, Escuela Nacional de Estudios Superiores Unidad Mérida, Universidad Nacional Autónoma de México
Asociación Mexicana de Mastozoología A. C.
Resumen
Human activity has caused the decrease of about 20 % of the planet's vertebrate diversity and 25 % in their abundance. Many large and medium-sized herbivore mammals have gone extinct locally, unleashing a cascade of ecosystem changes. The spotted paca (Cuniculus paca) is impacted by hunting and anthropogenic habitat fragmentation and loss. To protect spotted pacas, it is essential to estimate anthropogenic effects on their geographic distribution. Through the use of primary biodiversity data, bioclimatic data, land-cover data, and a human footprint index, we modeled the distribution of C. paca. From 105 candidate models, only one model met our selection criteria. The variables with the highest contribution were the human footprint and annual precipitation. According to the model's performance curves, the spotted paca has low to medium tolerance of anthropogenic pressure. Cuniculus paca tolerates low to medium anthropogenic disturbance, which we hypothesize is related to reduced predator pressure in habitats modified by humans. Accounting for the costs and benefits of anthropogenic disturbance is essential to paca conservation.
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Año:
2023
ISSN:
2007-3364
Stuhler, John D.; Texas Tech University; Halsey, Michaela K.; Texas Tech University; Goetze, Jim R.; Laredo College; Bradley, Robert D.; Texas Tech University; Ray, David A.; Texas Tech University; Stevens, Richard D.; Texas Tech University
Asociación Mexicana de Mastozoología A. C.
Resumen
The Texas kangaroo rat (Dipodomys elator) is a rare species of conservation interest at both the state and federal level. Therefore, an updated understanding of distribution and abundance of D. elator is critical for initiating informed decisions about its conservation status and subsequent management strategies. We surveyed more than 850 locations along unpaved county roads across the historical range of this species in north-central Texas to identify sites of D. elator presence and examine patterns of rodent species associations. We determined that D. elator presently occurs in five counties in Texas within its historical range and was the eighth most abundant species of the 14 species that we captured. Moreover, we found that the majority of pairwise species associations, including those involving D. elator, were random and there was no strong evidence that pairs of rodents were aggregating or segregating with respect to each other. We did observe negative associations between D. elator and both Dipodomys ordii (Ord’s kangaroo rat) and Sigmodon hispidus (hispid cotton rat). Nonetheless, these patterns indicate that interspecific interactions do not play a strong role in influencing the distribution of D. elator. However, the restricted and temporally dynamic distribution of this species suggests that a metapopulation perspective should be considered when making future conservation considerations.
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Año:
2023
ISSN:
2007-3364
Ruiz-García, Manuel; Laboratorio de Genética de Poblaciones Molecular-Biología Evolutiva, Departamento de Biología; Jaramillo, Maria Fernanda; Laboratorio de Genética de Poblaciones Molecular-Biología Evolutiva, Departamento de Biología; Shostell, Joseph Mark; Math, Science and Technology Department, University of Minnesota
Asociación Mexicana de Mastozoología A. C.
Resumen
Letter to the Editor
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Año:
2023
ISSN:
2007-3364
Rahman, Dede Aulia; Bogor Agricultural University; Aulagnier, Stéphane; Comportement et Ecologie de la Faune Sauvage, INRAE, Université de Toulouse.; Sunderland-Groves, Jacqueline L.; Department of Forest Resources Management, University of British Columbia; Semiadi, Gono; Research Center for Applied Zoology, National Research and Innovation Agency
Asociación Mexicana de Mastozoología A. C.
Resumen
The Bawean deer plays a vital role in its small and isolated ecosystem as a herbivore and effective seed disperser, as well as holds cultural importance to the local community. However, the ecology of this Critically Endangered deer is poorly studied. Using random encounter and occupancy modeling based on 29,350 camera trap days between 2017 and 2019, we aimed to provide population estimates, habitat preferences, and behavioral data for this species. The population was 120–277 mature individuals, much less than the number in 1978. The density of Bawean deer could be related to the type of forest and the predation by free-roaming dogs as well as other factors such as the increase of wild pigs on Bawean Island. According to the best occupancy model, the tall and community forests far from human settlements are the most suitable areas for this species. Bawean deer is mainly crepuscular with significant daytime activity. Our results point out free-roaming dogs as a major threat to the native mammal community on Bawean island. We suggest the Bawean deer be listed as Critically Endangered following criteria B1a,b (ii, iii, v) of IUCN. Therefore, effective law enforcement and an adequate conservation strategy, including free-roaming dog control, are required to reduce the impacts of both direct and indirect threats.
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Año:
2023
ISSN:
2007-3364
Brace, Selina; Natural History Museum, London; Turvey, Samuel T.; Institute of Zoology, Zoological Society of London; Weksler, Marcelo; Museu Nacional / Universidade Federal do Rio de Janeiro; Hoogland, Menno L. P.; Leiden University; Barnes, Ian; Natural History Museum
Asociación Mexicana de Mastozoología A. C.
Resumen
The rodent genus name Antillomys and the species name Antillomys rayi (Cricetidae: Sigmodontinae) are unavailable, given that the publication where it originally appears did not satisfy the requirements of the International Code of Zoological Nomenclature. The names were formally described in the supplementary information (electronic online text) in Word format, and the work itself did not contain evidence that it was registered in Zoobank, as per Article 8.5.3 (amended) of the International Code of Zoological Nomenclature. In this note we establish the availability of the names Antillomys and Antillomys rayi, by fulfilling ICZN´s requirements.
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Año:
2023
ISSN:
2007-3364
Ruedas, Luis A.; Portland State University; López, Lucía I.; rea de Ciencias Básicas, Sede Regional de Atenas, Universidad Técnica Nacional, Atenas; Mora, José M.; Universidad Técnica Nacional
Asociación Mexicana de Mastozoología A. C.
Resumen
To ascertain the taxonomic identity of cottontail rabbits from Costa Rica, we examined the holotypes of all the taxa of Sylvilagus currently subsumed within the Sylvilagus floridanus species complex as defined by Philip Hershkovitz. The almost 40 named taxa contained in S. floridanus are widespread from northeastern to north-central North America in the north (including southern Canada), through Central America to northwestern South America. Here, we examine Mesoamerican taxa in the complex, on the basis of holotypes, and test the hypothesis of conspecificity among them. Our examination of the holotypes, along with uni- and multivariate assessments of mensural variation as well as character variation in existing and newly acquired specimens from Costa Rica, indicate that S. floridanus (J. A. Allen, 1890) sensu stricto is restricted to North America, with its southern limit at the Isthmus of Tehuantepec. Sylvilagus yucatanicus (Miller, 1899) is limited to the Yucatan Peninsula. Sylvilagus hondurensis Goldman, 1932 is retained as a species, with S. h. costaricensis Harris, 1933 as a junior synonym. Costa Rica is revealed to have three described species: S. gabbi (J. A. Allen, 1877), S. hondurensis costaricensis, and S. dicei Harris, 1932. However, there are indications that this taxonomic scheme may in fact underrepresent the existing number of biological species of Sylvilagus present in that country.
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Año:
2023
ISSN:
2007-3364
Ramírez-Chaves, Héctor E.; Grupo de Investigación en Genética, Biodiversidad y Manejo de Ecosistemas (GEBIOME), Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Caldas, Calle 65 No. 26-10, 170004, Manizales, Caldas, Colombia Centro de Museos, Museo de Historia Natural. Universidad de Caldas. Calle 65 No 26-10, CP 170004, Manizales; Caldas, Colombia.; Alarcón Cifuentes, Mallerly; Grupo de Investigación en Genética, Biodiversidad y Manejo de Ecosistemas (GEBIOME), Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Caldas, Calle 65 No. 26-10, 170004, Manizales, Caldas, Colombia.; Noguera-Urbano, Elkin A; Evaluación y Monitoreo de la Biodiversidad. Instituto de Investigación de Recursos Biológicos, Alexander von Humboldt. Avenida Paseo Bolívar (Circunvalar) 16-20, CP 110231, Bogotá, Cundinamarca, Colombia. Programa de Biología, Facultad de Ciencias Exactas y Naturales. Universidad de Nariño, Grupo de Investigación de Ecología Evolutiva, Nariño, Colombia.; Pérez, Weimar A; Institución Educativa Agroindustrial Monterilla. Caldono, Cauca, Colombia.; Torres-Martínez, Maria M; Programa de Pós-graduação em Ecologia e Conservação, Laboratório de Biodiversidade, Conservação e Ecologia de Animais Silvestres, Setor de Ciências Biológicas. Universidade Federal do Paraná. Avenida Coronel Francisco H. dos Santos 100, CEP 81531-990, CP 19031, Curitiba, Paraná, Brazil.; Ossa-López, Paula A.; Grupo de Investigación en Genética, Biodiversidad y Manejo de Ecosistemas (GEBIOME), Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Caldas, Calle 65 No. 26-10, 170004, Manizales, Caldas, Colombia. Doctorado en Ciencias - Biología, Facultad de Ciencias Exactas y Naturales. Universidad de Caldas. Calle 65 No 26-10, CP 170004, Manizales; Caldas, Colombia.; Rivera-Páez, Fredy A.; Grupo de Investigación en Genética, Biodiversidad y Manejo de Ecosistemas (GEBIOME), Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Caldas, Calle 65 No. 26-10, 170004, Manizales, Caldas, Colombia.; Morales-Martínez, Darwin Manuel; Museum of Natural Science and Department of Biological Sciences. Louisiana State University. Murphy J. Foster Hall, 119 Dalrymple Dr, PC 70802, Baton Rouge, Louisiana, USA.
Asociación Mexicana de Mastozoología A. C.
Resumen
The brown bat Eptesicus fuscus (Chiroptera: Vespertilionidae) is a widely distributed species with up to 11 subspecies ranging from North America, some Caribbean islands, and Central and northern South America. Within the species, Eptesicus fuscus miradorensis occurs from North America to South America being the only subspecies that occurs in the continental area of the Neotropical region and might be considered a full species. Also, it has been suggested that E. f. miradorensis shows a clinal morphologic variation from the northernmost populations of Central America toward South America. We evaluated the systematic position of E. f. miradorensis using genetic samples from Central and South America. In addition, we assessed the morphometric variations of E. f. miradorensis using 14 external and cranial measurements of specimens distributed along America. To evaluate the clinal variation and interspecific changes through its distribution, we assigned three groups considering the localities of origin i) North (México), ii) Center (Guatemala-Panamá), and iii) South (Colombia-Venezuela) using multivariate analyzes. We also compiled the localities of the revised specimens and these from databases to determine the environmental factors that potentially constrain the distribution of the taxon. We suggest that E. f. miradorensis should be elevated to the species level based on genetic comparisons. Additionally, we did not find sexual dimorphism or size variation associated with its distribution. The species is distributed from México to South America (Colombia, Venezuela, and Ecuador) in elevations that average over 1,000 m, showing a strong association with high mountain ecosystems. This taxon increases to 12 the number of species of bats of the subgenus Eptesicus in South America.
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