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Possible Effects Of Long-Term Weather Changes And Extreme Weather Events On Mice Population Abundances In Monteverde, Costa Rica, December 2017, Emily S. Parker
Possible Effects Of Long-Term Weather Changes And Extreme Weather Events On Mice Population Abundances In Monteverde, Costa Rica, December 2017, Emily S. Parker
Tropical Ecology and Conservation [Monteverde Institute]
Mice and rat abundance is determined by a multitude of factors, including, but not limited to: climate change, predation, and food availability. In this study, I analyzed the effects of daily and long-term weather on rodent populations to understand a possible decrease in abundance from 2016 to 2017 in Monteverde, Puntarenas, Costa Rica. I took observations of individuals from four different sites: Santa Elena, Bajo del Tigre, Dwight and Rachel Crandell Memorial Reserve, and the Estación Biológica Monteverde. While a considerable number of specimens were captured in Bajo del Tigre, I observed the total abundance of rodents to be significantly …
Demasculinization And Feminization Of Male Gonads By Atrazine: Consistent Effects Across Vertebrate Classes, Krista A. Mccoy
Demasculinization And Feminization Of Male Gonads By Atrazine: Consistent Effects Across Vertebrate Classes, Krista A. Mccoy
Integrative Biology Faculty and Staff Publications
Atrazine is the most commonly detected pesticide contaminant of ground water, surface water, and precipitation. Atrazine is also an endocrine disruptor that, among other effects, alters male reproductive tissues when animals are exposed during development. Here, we apply the nine so-called “Hill criteria” (Strength, Consistency, Specificity, Temporality, Biological Gradient, Plausibility, Coherence, Experiment, and Analogy) for establishing cause–effect relationships to examine the evidence for atrazine as an endocrine disruptor that demasculinizes and feminizes the gonads of male vertebrates. We present experimental evidence that the effects of atrazine on male development are consistent across all vertebrate classes examined and we present a …
Blood Parasite Infection In Mice From Cloud Forest And Nearby Disturbed Habitats, December 2006, Jesse A. Blumenstock
Blood Parasite Infection In Mice From Cloud Forest And Nearby Disturbed Habitats, December 2006, Jesse A. Blumenstock
Tropical Ecology and Conservation [Monteverde Institute]
Conversion of habitat by humans is pervasive, increasing, and the root of serious environmental problems. This study was performed to find differences in blood parasite infections of host mice in neotropical cloud forest versus nearby disturbed habitat. In Monteverde, Costa Rica, mice were trapped and examined for blood parasite species richness and abundance in primary forest and disturbed areas near houses. Twenty-eight mice were captured: 15 from the forest and 13 from the disturbed habitats. Eighty-six percent of these mice were of the species Peromyscus nudipes. There was no significant difference of parasite species richness between mice from the forest …