Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"frugivory"”.
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Frugivory and North American Migrants in a Neotropical Second-Growth Woodland
Bird species visitation to a single fruit source fluctuates over time due to changes in fruit density, presence of behaviorally dominant birds, and availability of alternative fruit sources. As a result, different bird species are major consumers of a fruit source at various periods of the fruiting …
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Manipulating social information to promote frugivory by birds on a Hawaiian island
… could increase visitations and more importantly frugivory on focal fruiting plants. We also tested if the visitation rates to focal plants were influenced by conspecific and/or heterospecific vocalizations. We conducted 80 playback experiments at native and introduced fruiting plants, and …
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Fruits and frugivory in neotropical primates and in Amazonian flooded and unflooded forests
… an important trait in relation to the degree of frugivory within consumers was emphasised via one of the most extensive compilations on the feeding ecology of any frugivorous vertebrate taxon. By amassing the observations of feeding records accumulated over several decades of neotropical primate …
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The Influence of Human Disturbance on Avian Frugivory and Seed Dispersal in a Neotropical Rainforest
… I asked whether human activity influences avian frugivory and seed dispersal, bird-fruit interactions that facilitate plant reproduction. On Tobago (West Indies), I compared patterns of frugivory in three adjacent rainforest habitats along a gradient of increasing disturbance: primary forest in a …
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Phenology and frugivory of large-fruited species in northern New Zealand and the impacts of introduced mammals
This thesis investigated the reproductive phenology, fruit features, dispersal and seed predation of native New Zealand fleshy-fruited species, concentrating mainly on fruits larger than 10-mm in diameter borne by trees. There are several species with large tree-borne fruit in New Zealand and they …
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Winter Behavior and Ecology of Eastern Bluebirds (<i>Sialia sialis</i>): Home Ranges, Habitat Use, and Effect of Weather on Foraging Behavior
… all observations, N = 235), although shifts to frugivory were observed during periods of low temperatures, low wind speeds, and the presence of snow. Hackberry (<em>Celtis occidentalis</em>), mistletoe (<em>Phoradendron leucarpum</em>), and red cedar (<em>Juniperus virginiana</em>) were the most …
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Gut Microbiota of Migratory Passerines at Stopover
… many birds, correlating to seasonal patterns of frugivory in migrants. Taken together, these results suggest that the gut microbiota of migratory passerines is a diverse and dynamic system which is highly impacted by environmental variables.</p>
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The Ecology and Evolution of the Folivore Gut Microbiome in Madagascar’s Lemurs
… feeding strategies ranging from folivory to frugivory. In each data chapter, I used subsets of samples and applied the comparative approach across analytical scales to probe GMB structure and function, determined via amplicon and metagenomic sequencing, and spectroscopy analysis. In my first …
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Digestive Strategies, Fruit Processing, and Seed Dispersal in the Chimpanzees (Pan Troglodytes) and Redtail Monkeys (Cercopithecus Ascanius) of Kibale National Park, Uganda
… monkeys and chimpanzees; observations of frugivory and defecation in Kibale National Park, Uganda, and; results from Kibale seed fate experiments. Contrary to body size expectations, I found that redtails have significantly longer digestive transit times than chimpanzees; in fact, …
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What’s in a Tooth? Signals of Ecogeography and Phylogeny in the Dentition of Macaques (Cercopithecidae: Macaca)
… Larger anterior were found to be associated with frugivory and tropical ecology, whereas a larger posterior dentition was linked to a more folivorous diet and temperate environments. The latter pattern was largely a function of phylogenetic relatedness. Phylogenetic signal was generally strong in …
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Are black bears (Ursus americanus) effective seed dispersal agents? With a little help from their friends.
Black bears (Ursus americanus) are generally considered effective seed dispersal agents for fleshy-fruited plants because they can consume hundreds of fruits at once and have large home ranges. Seedlings can emerge from fecal piles, but if any seeds are removed from feces by rodents, it is often …
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Predicting Multi-trophic Consequences of an Emerging Disease
<p>There are numerous examples of how exotic insect pests and pathogens have altered the dominance of native tree species and the ecological processes and function related to those species. While targeted species may persist in a functionally altered state via vegetative sprouting, the widespread …
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Nonrandom seed dispersal by lemur frugivores: mechanism, patterns and impacts
Frugivores act as seed-dispersal agents in many ecosystems. Thus, understanding the roles and impacts of seed dispersal by frugivores is important to understand the structure and diversity maintenance of plant communities. Frugivore-mediated seed dispersal is behaviorally driven, generating …