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 20 of 52 for “"anti-predator"”.
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Anti-Predator Responses of Squid Throughout Ontogeny
… escape behaviors have evolved as components of anti-predator responses in squids. The goals of this study include: (1) examine the role of the lateral line analogue and vision in successful predator evasion; (2) measure kinematics of escape jetting; (3) document how chromatic patterning, …
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Predator recognition and anti-predator behavior in juvenile Asian carp
… many prey fishes. Chemical, social, and similar predator cues may all inform an individual of a possible impending predatory threat. Bighead (Hypophthalmichthys nobilis) and silver carp (H. molitrix) widespread invasive fishes, and can be vulnerable to predation during their first year. Because …
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Sponge Community Structure and Anti-Predator Defenses on Temperate Reefs of the South Atlantic Bight
The interaction between predation and anti-predator defenses of prey is important in shaping community structure in all ecosystems. This study examined the relationship between sponge predation and the distribution of sponge anti-predator defenses on temperate reefs in the South Atlantic Bight. …
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Effects of Urbanization on Survival Rates, Anti-Predator Behavior, and Movements of Woodchucks (Marmota Monax)
… as variation in real and perceived risk from predators. I examined survival, cause-specific mortality, anti-predator behavior, and movements of adult woodchucks (Marmota monax) across an urbanization gradient within an agricultural landscape in central Illinois from 2007 to 2009. As predicted, …
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Effects of Turbidity on Anti-Predator Response and Foraging Behavior in the Fountain Darter, Etheostoma fonticola
… ability resulting in altered animal behavior. Anti-predator response and successful foraging ability, both essential elements of ecological communities, are two aspects of behavior that can be affected by turbidity. The federally endangered fountain darter (Etheostoma fonticola) is an important …
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Variation in predator communities and anti-predator behaviors of Milne-Edwards' sifakas (Propithecus edwardsi) in southeastern Madagascar
… human-disturbed habitats. I investigated lemur-predator interactions in southeastern Madagascar through a comparison of predator communities and anti-predator behaviors of Milne-Edwards' sifakas (Propithecus edwardsi) in the continuous rainforest of Ranomafana National Park, and the forest …
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Anti-predator behaviour of Cape fur seals Arctocephalus pusillus pusillus in relation to predation by white sharks Carcharodon carcharias around Seal Island, False Bay, South Africa
How predators affect the behaviour of their prey is one of the most studied subjects in behavioural ecology, with many hypothesis and models explaining how animals should behave and even more descriptive studies detailing how they do. The unification of the empirical with the theoretical, however, …
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Habitat Selection in Four Sympatric Small Mammal Species and the Effects of Potential Predators on Peromyscus Leucopus
I examined the effects of potential predators in relation to habitat selection in Peromyscus leucopus. I also examined habitat selection in three other sympatric species (Blarina brevicauda, Blarina carolinensis, Sorex longirostris). I utilized data fiom 49 sampling sites on National Park Service …
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Encounters in the forest: Social and ecological dimensions of lemur hunting, habitat change and biodiversity conservation in south-east Madagascar
… acute hunting conditions. Both species direct anti-predator behaviours towards humans and, in accordance with the ‘landscape of fear’ model, show spatial variations in their anti-predator responses according to the risk of human hunting. My data highlight the cascading effects of conservation …
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HUMAN PREDATION RISK AND ELK BEHAVIOR IN HETEROGENEOUS LANDSCAPES
… known about the indirect effect hunting has on anti-predator behavior, movement, resource selection, and human-elk conflicts. We first investigated the indirect effects of hunting on elk using an extensive comparison of elk anti-predator behavior across four human predation risk levels in …
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HUMAN PREDATION RISK AND ELK BEHAVIOR IN HETEROGENEOUS LANDSCAPES
… known about the indirect effect hunting has on anti-predator behavior, movement, resource selection, and human-elk conflicts. We first investigated the indirect effects of hunting on elk using an extensive comparison of elk anti-predator behavior across four human predation risk levels in …
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Vocal responses of adult Eastern Bluebirds (Sialia sialis) to potential nest predators and the behavioral responses of nestlings
… information about the threat posed by potential predators. However, few investigators have examined the responses of nestlings in cavity nests to the anti-predator vocalizations of adults. Therefore, the objectives of my study of cavity-nesting Eastern Bluebirds <em>(Sialia sialis)</em> were to …
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Infectious disease as a cause and consequence of phenotypic responses to challenge in a songbird species
… reduced foraging abilities and decreased anti-predator responses. Here we found that group-living provides all individuals with improved foraging and anti-predator behaviors, with the strongest benefits of group-living apparent for infected finches. This suggests that augmented sociality …
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Fitness for the Ark : are zoo bred amphibians ready to go back to the wild?
… skin colouration, body condition, vocalizations, anti-predator responses, skin associated bacteria and species recognition. The results obtained during this study show that captivity does have a significant impact on the behaviour and ecology of this species. However, the results cannot be …
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Phenotypic Consequences of Gestation Temperature in the Northern Watersnake, Nerodia Sipedon
… snakes, offspring morphology, locomotor speed, anti-predator behavior, and growth are known to be affected by developmental temperature and are likely to have important fitness consequences. I explored the influence of gestation temperature on offspring phenotypes produced by gravid Northern …
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Models of aposematism and the role of aversive learning
The majority of species are under predatory risk in their natural habitat and targeted by predators as part of the food web. Through the process of evolution by natural selection manifold mechanisms have emerged to avoid predation. As Fisher argued, it is the ubiquitous presence of anti-predator …
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The Effects Of Acidic Conditions And Tannins On The Survival, Development, And Behavior Of Cope’s Gray Treefrog (Hyla Chrysoscelis)
… of tannins, on the survival, development, and anti-predator behavior of Hyla chrysoscelis tadpoles. I conducted a field oviposition study to determine adult female site choice, and reared tadpoles in acidic and tannic conditions to investigate survival and antipredator behaviors. I found that …
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Evolutionary co-option of trap-jaw ant mandible strikes: defensive interactions with antlions
… themselves into the air. Until now, no actual predators or competitors have been found in the field against which trap-jaw use their “escape jumps.” Here, I examine the use of mandible snapping behavior in two trap-jaw species (Odontomachus brunneus and Odontomachus relictus) during their …
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Mating behavior and the effects of turbidity on preferences for size in the fountain darter, Etheostoma fonticola
… animals, including altering foraging and anti-predator behavior as well as mating preferences. The fountain darter, Etheostoma fonticola, is federally endangered making it an especially important species for examining the effects of turbidity on social behavior. Etheostoma fonticola is …
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Habitat Selection and Sexual Suggestion of Rocky Mountain Bighorn Sheep in Custer State Park, South Dakota
… Geist and Petocz (1977), Shank (1979), Morgantini and Hudson (1981), and Hogg (1983), where ram herds consist of mature males approximately 4 years old and older and ewe herds are comprised of all other individuals. Geist (1971), Shank (1979), and Hogg (1983) have shown that segregation …
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