Search for dissertations about: "Antipredator traits"

Found 4 swedish dissertations containing the words Antipredator traits.

2. 1. Antipredator defence in butterflies

   Author : Martin Olofsson; Christer Wiklund; Graeme Ruxton; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Antipredator defence; Bird; Crypsis; Predator; Predator-prey interaction; Prey-attack behavior; Butterfly; Deimatic behavior; Eyespots; Startle display; zoologisk ekologi; Animal Ecology;

   Abstract : Predation exerts a potent selection mechanism and has resulted in a suite of antipredation adaptations encompassing morphological and behavioral traits in prey. In butterflies, several such traits appear to be directed towards birds which are considered as one of their major predators. READ MORE

4. 2. Behaviour under predation risk - antipredator strategies, behavioural syndromes and sex-specific responses in aquatic prey

   Author : Sanna Harris; Biodiversitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; phenotypic integration; Poecilia reticulata; Asellus aquaticus; behavioural syndromes; chemical cues; predation; antipredator behaviour;

   Abstract : In many natural ecosystems, predation is well recognized as a strong evolutionary force, and predator-mediated selection has been demonstrated to induce changes in prey morphology, life history and behaviour. In my thesis, I have focused on behavioural responses in aquatic prey under the risk of predation. READ MORE

5. 3. Morphological antipredator adaptations in water fleas

   Author : Hans Lord; Göteborgs universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Body drag; Daphnia cristata; Reynolds number; viscosity; zooplankton; Bosmina; swimming velocity; cyclomorphosis; sexual dimorphism; head area; helmet angle; trophic condition; allometry; invertebrate predator; fish;

   Abstract : Some Bosmina and Daphnia species have the ability to develop extreme morphological antipredator defences, such as long antennules, high carapaces and helmets. The relative sizes of these plastic traits may differ substantially between populations, and also between individuals within a population, between sexes and during ontogeny. READ MORE

6. 4. Phenotypic plasticity and local adaptation in tadpoles

   Author : Björn Lardner; Biologiska institutionen; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; salinity tolerance; trade-off; life-history; tail depth; inducible defence; antipredator strategies; tadpoles; anurans; amphibians; Phenotypic plasticity; local adaptation; competitive ability; allozymes.; Animal ecology; Djurekologi;

   Abstract : Amphibian larvae are plastic in many traits. Can plasticity buffer population divergence, so that local adaptation is more common in non-plastic traits? I argue that this may be the case for adaptive plastic responses. READ MORE