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 6 of 6 for “"Anti-Predator Defense"”.
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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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AERIAL WARFARE BETWEEN BATS AND MOTHS: EFFICACY OF ACOUSTIC APOSEMATISM, FLIGHT BEHAVIORS OF UNPALATABLE PREY, AND TWO NOVEL ANTI-BAT STRATEGIES
… they have evolved a suite of remarkable defenses to deal with their would-be predators. Three key innovations underlie the success of the tiger moth lineage: (1) ultrasound-sensitive ears used to hear the foraging cries of attacking bats, (2) the ability to produce ultrasound of their …
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Diagnosing Bone Fracture to Assess Early Hominin Behaviour, Meat-Eating, and Socioecology at FLK-Zinjanthropus, Olduvai Gorge, Tanzania
… Homo food transport behaviour was structured by anti-predator defense strategies associated with a) foraging in an open habitat rich with competing predators, b) the lack of masticatory and digestive apparatus to quickly consume animal tissue, and c) the presence of altricial young in the hominin …
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Vocal responses of Blue Jays (Cyanocitta cristata) to raptors that differ in predatory threat
<p>Anti-predator defense is an important adaptation in group-living organisms. Some species of flocking birds use referential calls to communicate predator presence and the level of threat posed by predators. Previous studies have revealed that two species in the corvid family, American Crows …
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A Comparison of the Pectoral Spines in Virginia Catfishes
Catfish pectoral spines are an anti-predator defense mechanism. They can be bound or locked, making the fish harder to swallow, or used to produce distress calls by rubbing ridges on the dorsal process against a channel in the wall of the pectoral girdle. Growth of the pectoral spine and girdle …
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Evolutionary Patterns of Avian Tetrodotoxin Resistance
… muscle function. Some species possess TTX as an anti-predator defense, and some predator species have evolved resistance to TTX via evolutionary changes in Naᵥ channels. TTX resistance is well known in reptiles and amphibians, but its occurrence in birds has been relatively unexplored. Examining …