Browsing by Author "Sabat, Pablo"
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- ItemContrasting seasonal and aseasonal environments across stages of the annual cycle in the rufous-collared sparrow, Zonotrichia capensis: Differences in endocrine function, proteome and body condition(2018) Gonzalez-Gomez, Paulina L.; Echeverria, Valentina; Estades, Cristian F.; Perez, Jonathan H.; Krause, Jesse S.; Sabat, Pablo; Li, Jonathon; Kultz, Dietmar; Wingfield, John C.
- ItemDietary Flexibility and Intestinal Plasticity in Birds: a Field and Laboratory Study(1998) Sabat, Pablo; Bozinovic Kuscevic, Francisco
- ItemEarlier immunomodulatory treatment is associated with better visual outcomes in a subset of patients with Vogt-Koyanagi-Harada disease(WILEY-BLACKWELL, 2015) Urzua, Cristhian A.; Velasquez, Victor; Sabat, Pablo; Berger, Osvaldo; Ramirez, Sebastian; Goecke, Annelise; Vasquez, Dario H.; Gatica, Hector; Guerrero, JuliaPurpose: To evaluate clinical outcomes of first-line immunomodulatory therapy (IMT) and prednisone alone or late IMT in Vogt-Koyanagi-Harada disease.
- ItemEcoimmunology in degus: interplay among diet, immune response, and oxidative stress(2019) Ramírez Otarola, Natalia; Sarría, Mauricio; Rivera Rocabado, Daniela Suzana; Sabat, Pablo; Bozinovic Kuscevic, Francisco
- ItemEvaluation of the Accuracy of T-SPOT.TB for the Diagnosis of Ocular Tuberculosis in a BCG-vaccinated, Non-endemic Population(2016) Urzua, Cristhian A.; Liberman Salazar, Paulina; Abuauad, Sergio; Sabat, Pablo; Castiglione, Enzo; Beltran Videla, María A.; Aguilera Insunza, Raquel
- ItemIntraspecific basal metabolic rate varies with trophic level in rufous-collared sparrows(2009) Sabat, Pablo; Bozinovic Kuscevic, Francisco
- ItemIntraspecific variation in exploratory behavior and elevational affinity in a widely distributed songbird(SPRINGER, 2018) Poblete, Yanina; Gutierrez, Victor; Cid, Valeska; Newsome, Seth D.; Sabat, Pablo; Vasquez, Rodrigo A.Populations of the same species can vary substantially in their behavioral and morphometric traits when they are subject to different environmental pressures, which may lead to the development of different adaptive strategies. We quantified variation in exploratory behavior and morphometric traits among two rufous-collared sparrow populations that occur at low and high elevations in central Chile. Moreover, we used census and delta H-2 values of feather and blood to evaluate migration. We found that individual sparrows inhabiting high elevations were larger and showed more intense exploratory behavior in comparison with those that were captured at lower elevation. Moreover, we observed a steady decline in sparrow abundance during the winter and similar delta H-2 values for blood collected in the winter and summer at this site, which were significantly lower than blood delta H-2 values observed at low elevation. This pattern suggests that individuals do not move long distances during winter, and likely they remain at similar elevations in refuge habitats. As predicted, our results support the existent of different adaptive strategies among populations of the same species, and suggest that the combination of behavioral, morphometric, and stable isotope data is a novel and robust integrative approach to assess differences in adaptation across environmental gradients.
- ItemIs there an effect of environmental temperature on the response to an antigen and the metabolic rate in pups of the rodent Octodon degus?(2018) Ramirez Otarola, Natalia; Espinoza Véliz, Janyra Alejandra; Kalergis Parra, Alexis Mikes; Sabat, Pablo
- ItemResponse to lipopolysaccharide in Octodon degus pups produces age-related sickness behavior but does not have effects in juveniles.(2019) Ramírez-Otarola, Natalia; Espinoza, Janyra; Kalergis, Alexis M.; Sabat, PabloDuring vertebrate development, the immune function is inefficient and is mainly controlled by innate defense. While there have been detailed studies of various aspects of innate immune function, the effects of this function in the growth of vertebrates is still not well known. Similarly, there is little information regarding how early endotoxin exposure would affect juvenile phenotypes, specifically in a non-model mammal like a precocial rodent. We evaluated the response to an antigen and its cost in offspring of the rodent Octodon degus. We inoculated pups at 4 different ages (8, 15, 22 and 30 days after birth) with an antigen to determine the ontogeny and costs of the response to an endotoxin. We assessed changes in body mass, body temperature, sickness behavior and the levels of a key mediator of the inflammatory response, the cytokine interleukin-1β. We also determined the effects of early endotoxin exposure on the resting metabolic rate of juvenile animals (i.e. 90 days after birth). The cytokine levels, body mass and body temperature were unaffected by time of inoculation and treatment. However, pups subjected to inoculation at 22 days after birth with the antigen showed reduced locomotion. Juvenile resting metabolic rate was not affected by early endotoxin exposure. These results suggest that the magnitude of O. degus responses would not change with age. We discuss whether the lack of effect of the response on body mass or body condition is caused by environmental variables or by the precocial characteristics of O. degus.
- ItemSeasonal changes in digestive enzymes in five bird species(2018) Ramirez Otarola, Natalia; Naya, Daniel E.; Sabat, Pablo
- ItemTemperature variability and thermal performance in ectotherms : acclimation, behaviour, and experimental considerations(2016) Bozinovic Kuscevic, Francisco; Sabat, Pablo; Rezende Landaeta, Enrico; Canals, Mauricio
- ItemTerrestrial birds in coastal environments : metabolic rate and oxidative status varies with the use of marine resources(2018) Tapia Monsalve, Romina; Newsome, Seth D.; Sánchez Hernández, Juan C.; Bozinovic Kuscevic, Francisco; Nespolo Rossi, Roberto; Sabat, Pablo
- ItemTest of the Adaptive Modulation Hypothesis in Rodents: Dietary Flexibility and Enzyme Plasticity(1999) Sabat, Pablo; Bozinovic Kuscevic, Francisco
- ItemTesting the niche variation hypothesis in a community of passerine birds(2017) Maldonado, Karin; Bozinovic Kuscevic, Francisco; Newsome, Seth D.; Sabat, Pablo
- ItemThermal tolerance and survival responses to scenarios of experimental climatic change : changing thermal variability reduces the heat and cold tolerance in a fly(2016) Bozinovic Kuscevic, Francisco; Medina, Nadia R.; Alruiz Herrera, José Manuel; Cavieres Parada, Grisel Beatriz; Sabat, Pablo
- ItemWater Economy of Three Cinclodes (Furnariidae) Species Inhabiting Marine and Freshwater Ecosystems(2004) Sabat, Pablo; Bozinovic Kuscevic, Francisco