Dr- Jose I. Gonzalez Rojas | Universidad Autónoma de Nuevo León (original) (raw)

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Papers by Dr- Jose I. Gonzalez Rojas

Research paper thumbnail of Winter diet of Burrowing Owls in the Llano La Soledad, Galeana, Nuevo León, México

PeerJ

The dietary niche breadth of the Burrowing Owl was determined (Athene cuniculariaMolina, 1782) in... more The dietary niche breadth of the Burrowing Owl was determined (Athene cuniculariaMolina, 1782) in Llano La Soledad, Galeana, Nuevo Leon in northern Mexico, by considering prey type, numerical percentage, weight, weight percentage, frequency of occurrence percentage, and IRI percentage. The study compared data from three winters (2002–2003, 2003–2004, 2004–2005) by analyzing 358 pellets, identifying 850 prey items. Invertebrates constituted 90% of prey items, which mostly included insects (85%); beetles were the most common insects found in pellets (70%). Vertebrates made up 84% of consumed weight, of which 83% were mammals. Most of the mammals were cricetid rodents (41%). Niche breadth based on the numerical and weight percentage confirmed the Burrowing Owl as a generalist species with mean values per year ranging between 0.65 and 0.82. Additionally, there was a strong association between the weight of rodent species in winter. This association was mainly driven by changes in compos...

Research paper thumbnail of Interdisciplinary science and fishers’ local ecological knowledge of sawfishes in the Yucatán Peninsula

Aquatic Conservation: Marine and Freshwater Ecosystems

Our knowledge of sawfishes remains scant for Latin America. Pristis pristis (largetooth sawfish) ... more Our knowledge of sawfishes remains scant for Latin America. Pristis pristis (largetooth sawfish) and Pristis pectinata (smalltooth sawfish) are critically endangered. In the Yucatán Peninsula (YP), P. pristis and P. pectinata inhabit coastal landscapes. A total of 290 surveys of fishers’ local ecological knowledge (LEK), including a geospatial component, were collected; 74 literature sources and available archaeological data for the region were reviewed. Interdisciplinary results show the following: the common past presence of sawfishes, their cultural significance for coastal societies, and the contemporary absence of sawfishes in coastal areas where they existed historically; sightings of juveniles were only documented by elder fishers, and only two recent narratives mention sawfishes caught incidentally 5 years ago. Geospatial results provide evidence for 52 geographic sites where sawfishes were common in the YP. Results support the development of research methodologies to study ...

Research paper thumbnail of DISPATCHES Serologic Evidence of West Nile Virus Infection in Horses, Yucatan

Serum samples were obtained from 252 horses in the

Research paper thumbnail of Population density of the western burrowing owl (Athene cunicularia hypugaea) in Mexican prairie dog (Cynomys mexicanus) colonies in northeastern Mexico

Research paper thumbnail of Detection of antibodies to West Nile and Saint Louis encephalitis viruses in horses

Salud Pública de México, 2004

Research paper thumbnail of Molecular phylogenetic analysis of an endangered Mexican sparrow: Spizella wortheni

Molecular Phylogenetics and Evolution, 2010

The Worthen's Sparrow (Spizella wortheni) is an endemic bird species of the Mexican Plateau that ... more The Worthen's Sparrow (Spizella wortheni) is an endemic bird species of the Mexican Plateau that is protected by Mexican law. Considering its limited range (25 km 2), small population size (100-120 individuals), and declining population, it is one of the most endangered avian species in North America. Although it has been assumed to be the sister taxon of the Field Sparrow (Spizella pusilla), the systematic and evolutionary relationships of Worthen's Sparrow have never been tested using modern molecular phylogenetic methods. We addressed the molecular phylogeny of S. wortheni analyzing six mitochondrial genes (3571 bp) from all of the natural members of the genus Spizella. Our maximum likelihood and Bayeasian analysis indicate that despite the superficial similarity, S. wortheni is not the sister taxon of S. pusilla, but is instead most closely related to the Brewer's Sparrow (Spizella breweri). Also new insights about the phylogenetics relationships of the Spizella genera are presented.

Research paper thumbnail of First Breeding Record of a Mountain Plover in Nuevo Leon, Mexico

The Wilson Journal of Ornithology, 2006

Research paper thumbnail of Host-Feeding Preference of Culex Quinquefasciatus in Monterrey, Northeastern Mexico

Journal of the American Mosquito Control Association, 2006

Research paper thumbnail of Endangered species management and the role of conservation genetics: A response to Barr et al

Research paper thumbnail of Aprovechamiento de las aves cinegéticas, de ornato y canoras de Nuevo León, México

Research paper thumbnail of Bird Diversity in the Petens of Yucatan State, Mexico

ORNITOLOGIA NEOTROPICAL

The avifauna of the petens on the northwestern coast of the Yucatan state, Mexico, has not been p... more The avifauna of the petens on the northwestern coast of the Yucatan state, Mexico, has not been previously studied. A study was done of this avifauna based on records generated between September 2005 and October 2006, using visual and auditory identification and the point count method with a fixed radius. A total of 104 species was identified, primarily resident ones. This species list accounts for 19% of the bird species reported for the Yucatan Peninsula and 54% of those distributed in land habitats of the El Palmar State Reserve. Within the point count area, a total of 70 species was recorded. According with the density and frequency data, we consider five species as representative of the petens and flooded grasslands of the northwestern coast of Yucatan state: Todirostrum cinereum, Geothlypis poliocephala, Melanerpes aurifrons, Cyanocorax yncas, and Mimus gilvus. Three migratory species were present in the study area during 7 or 8 months: Dendroica petechia, Geothlypis trichas, ...

Research paper thumbnail of West Nile Virus Isolation in Human and Mosquitoes, Mexico

Emerging Infectious Diseases, 2005

Research paper thumbnail of Comparison of Molecular Markers in the Endangered Black-Capped Vireo ( Vireo atricapilla ) and Their Interpretation in Conservation

Research paper thumbnail of Winter diet of Burrowing Owls in the Llano La Soledad, Galeana, Nuevo León, México

PeerJ

The dietary niche breadth of the Burrowing Owl was determined (Athene cuniculariaMolina, 1782) in... more The dietary niche breadth of the Burrowing Owl was determined (Athene cuniculariaMolina, 1782) in Llano La Soledad, Galeana, Nuevo Leon in northern Mexico, by considering prey type, numerical percentage, weight, weight percentage, frequency of occurrence percentage, and IRI percentage. The study compared data from three winters (2002–2003, 2003–2004, 2004–2005) by analyzing 358 pellets, identifying 850 prey items. Invertebrates constituted 90% of prey items, which mostly included insects (85%); beetles were the most common insects found in pellets (70%). Vertebrates made up 84% of consumed weight, of which 83% were mammals. Most of the mammals were cricetid rodents (41%). Niche breadth based on the numerical and weight percentage confirmed the Burrowing Owl as a generalist species with mean values per year ranging between 0.65 and 0.82. Additionally, there was a strong association between the weight of rodent species in winter. This association was mainly driven by changes in compos...

Research paper thumbnail of Interdisciplinary science and fishers’ local ecological knowledge of sawfishes in the Yucatán Peninsula

Aquatic Conservation: Marine and Freshwater Ecosystems

Our knowledge of sawfishes remains scant for Latin America. Pristis pristis (largetooth sawfish) ... more Our knowledge of sawfishes remains scant for Latin America. Pristis pristis (largetooth sawfish) and Pristis pectinata (smalltooth sawfish) are critically endangered. In the Yucatán Peninsula (YP), P. pristis and P. pectinata inhabit coastal landscapes. A total of 290 surveys of fishers’ local ecological knowledge (LEK), including a geospatial component, were collected; 74 literature sources and available archaeological data for the region were reviewed. Interdisciplinary results show the following: the common past presence of sawfishes, their cultural significance for coastal societies, and the contemporary absence of sawfishes in coastal areas where they existed historically; sightings of juveniles were only documented by elder fishers, and only two recent narratives mention sawfishes caught incidentally 5 years ago. Geospatial results provide evidence for 52 geographic sites where sawfishes were common in the YP. Results support the development of research methodologies to study ...

Research paper thumbnail of DISPATCHES Serologic Evidence of West Nile Virus Infection in Horses, Yucatan

Serum samples were obtained from 252 horses in the

Research paper thumbnail of Population density of the western burrowing owl (Athene cunicularia hypugaea) in Mexican prairie dog (Cynomys mexicanus) colonies in northeastern Mexico

Research paper thumbnail of Detection of antibodies to West Nile and Saint Louis encephalitis viruses in horses

Salud Pública de México, 2004

Research paper thumbnail of Molecular phylogenetic analysis of an endangered Mexican sparrow: Spizella wortheni

Molecular Phylogenetics and Evolution, 2010

The Worthen's Sparrow (Spizella wortheni) is an endemic bird species of the Mexican Plateau that ... more The Worthen's Sparrow (Spizella wortheni) is an endemic bird species of the Mexican Plateau that is protected by Mexican law. Considering its limited range (25 km 2), small population size (100-120 individuals), and declining population, it is one of the most endangered avian species in North America. Although it has been assumed to be the sister taxon of the Field Sparrow (Spizella pusilla), the systematic and evolutionary relationships of Worthen's Sparrow have never been tested using modern molecular phylogenetic methods. We addressed the molecular phylogeny of S. wortheni analyzing six mitochondrial genes (3571 bp) from all of the natural members of the genus Spizella. Our maximum likelihood and Bayeasian analysis indicate that despite the superficial similarity, S. wortheni is not the sister taxon of S. pusilla, but is instead most closely related to the Brewer's Sparrow (Spizella breweri). Also new insights about the phylogenetics relationships of the Spizella genera are presented.

Research paper thumbnail of First Breeding Record of a Mountain Plover in Nuevo Leon, Mexico

The Wilson Journal of Ornithology, 2006

Research paper thumbnail of Host-Feeding Preference of Culex Quinquefasciatus in Monterrey, Northeastern Mexico

Journal of the American Mosquito Control Association, 2006

Research paper thumbnail of Endangered species management and the role of conservation genetics: A response to Barr et al

Research paper thumbnail of Aprovechamiento de las aves cinegéticas, de ornato y canoras de Nuevo León, México

Research paper thumbnail of Bird Diversity in the Petens of Yucatan State, Mexico

ORNITOLOGIA NEOTROPICAL

The avifauna of the petens on the northwestern coast of the Yucatan state, Mexico, has not been p... more The avifauna of the petens on the northwestern coast of the Yucatan state, Mexico, has not been previously studied. A study was done of this avifauna based on records generated between September 2005 and October 2006, using visual and auditory identification and the point count method with a fixed radius. A total of 104 species was identified, primarily resident ones. This species list accounts for 19% of the bird species reported for the Yucatan Peninsula and 54% of those distributed in land habitats of the El Palmar State Reserve. Within the point count area, a total of 70 species was recorded. According with the density and frequency data, we consider five species as representative of the petens and flooded grasslands of the northwestern coast of Yucatan state: Todirostrum cinereum, Geothlypis poliocephala, Melanerpes aurifrons, Cyanocorax yncas, and Mimus gilvus. Three migratory species were present in the study area during 7 or 8 months: Dendroica petechia, Geothlypis trichas, ...

Research paper thumbnail of West Nile Virus Isolation in Human and Mosquitoes, Mexico

Emerging Infectious Diseases, 2005

Research paper thumbnail of Comparison of Molecular Markers in the Endangered Black-Capped Vireo ( Vireo atricapilla ) and Their Interpretation in Conservation