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Análisis de la dieta de Cynomys mexicanus en convivencia con rumiantes y su impacto en el agostadero. Colegio de Postgraduados
Olvera Hernández, Abundio.
Se determinó la composición botánica de la dieta del perro de la pradera (Cynomyx mexicanus), cabras y ovinos con la técnica microhistológica, durante cuatro estaciones del año, en un pastizal desértico mediano abierto, en el Rancho los Ángeles, propiedad de la Universidad Autónoma Agraria Antonio Narro de Saltillo, Coah., México. Durante la mayor parte del año los perros de la pradera seleccionaron mayor cantidad de pastos (79 % en promedio, en todas las estaciones del año) en comparación con cabras y ovejas. El total de gramíneas en la dieta de las cabras fue consistente (20 %) para las diferentes estaciones del año, mientras que, en la dieta de ovejas, esta clase de forraje alcanzó su máximo nivel durante el invierno (72 %) y el más bajo en verano (62...
Palavras-chave: Análisis microhistológico; Traslape de dieta; Selección de alimento; Pequeños rumiantes; Analysis fecal microhistological; Overlap; Selection of feed; Small ruminant; Ganadería; Doctorado.
Ano: 2011 URL: http://hdl.handle.net/10521/500
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Endoscopic and symptoms analysis in Mexican patients with irritable Bowel syndrome, dyspepsia, and gastroesophageal reflux disease Anais da ABC (AABC)
Camacho,Santiago; Bernal,Fernando; Abdo,Miguel; Awad,Richard A..
The aim of this study was to analyze the data of endoscopy and symptoms in 118 Mexican patients with irritable bowel syndrome (IBS), dyspepsia, non-erosive reflux disease (NERD) and erosive esophagitis (EE). IBS criteria were fulfilling for dyspepsia patients in 47%, for NERD in 48%, and for EE patients in 48% of cases. Esophagitis was present in 42% of patients with IBS and in 45% of patients with dyspepsia. A higher prevalence of hiatus hernia was found in EE vs. NERD. Heartburn and acid eructation were associated with the presence of esophagitis; acid eructation, regurgitation and nocturnal pain with duodenitis; and heartburn and regurgitation with hiatus hernia. Males more frequently reported: ucus in feces, abdoinal distension, nausea and gastritis;...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dyspepsia; Endoscopy; Irritable bowel syndrome; Overlap; Reflux disease; Symptoms.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000400018
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Food resource partitioning in a fish community of the central Amazon floodplain Neotropical Ichthyology
Mérona,Bernard de; Rankin-de-Mérona,Judy.
Diets of most of fish species inhabiting a floodplain lake in central Amazonia were studied over a two years and half period. Based on the percentage of relative occurrence of 11 major food categories a classification of species in 11 feeding guilds is proposed. Many species were found to be specialized feeders. Fish, detritus and insects were the most important food resources supporting the fish community in both seasons, but the proportions of fruits, invertebrates and fish were reduced during the low water season. At the community level mean diet overlap between species was low, suggesting efficient resource partitioning within the community. However mean overlap between unspecialized feeders was high. Based on the 23 most abundant species belonging to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Varzea lake; Fishes; Diet; Overlap; Seasonal variability.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252004000200004
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Paleobiogeographic evolution and distribution of Carcharodontosauridae (Dinosauria, Theropoda) during the middle Cretaceous of North Africa Pap. Avulsos de Zool. (São Paulo)
Candeiro,Carlos Roberto dos Anjos; Brusatte,Stephen Louis; Vidal,Luciano; Pereira,Paulo Victor Luiz Gomes da Costa.
Abstract Over the last few decades, the systematics and evolution of carcharodontosaurids, a group of large predatory dinosaurs, from North Africa have been better understood mainly due the discovery of new species. We review this record here and discuss its importance for understanding the evolution and ecology of these dinosaurs. North Africa has one of the best records of carcharodontosaurid species. These species show dietary specializations and paleogeographic distributions similar to other top predatory theropods such as Abelisauridae and Spinosauridae. However, carcharodontosaurids have a wider distribution than other large theropods. The middle Cretaceous of North Africa was characterized by the niche overlap between large predators. This evidence...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carcharodontosauridae; Gondwana; Middle Cretaceous; North Africa; Overlap.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492018000100228
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Spatial interactions between saithe (Pollachius virens) and hake (Merluccius merluccius) in the North Sea ArchiMer
Cormon, Xochitl; Loots, Christophe; Vaz, Sandrine; Vermard, Youen; Marchal, Paul.
Spatial interactions between saithe (Pollachius virens) and hake (Merluccius merluccius) were investigated in the North Sea. Saithe is a well-established species in the North Sea, while occurrence of the less common hake has recently increased in the area. Spatial dynamics of these two species and their potential spatial interactions were explored using binomial generalized linear models (GLM) applied to the International Bottom Trawl Survey (IBTS) data from 1991 to 2012. Models included different types of variables: (i) abiotic variables including sediment types, temperature, and bathymetry; (ii) biotic variables including potential competitors and potential preys presence; and (iii) spatial variables. The models were reduced and used to predict and map...
Tipo: Text Palavras-chave: Biotic interactions; Competition; Generalized linear models; Hake; North Sea; Overlap; Predator-prey relationship; Saithe; Species distribution modelling.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00200/31146/29847.pdf
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