Search for dissertations about: "inducible defences"

Showing result 1 - 5 of 6 swedish dissertations containing the words inducible defences.

  2. 1. Defence on Demand : A physiological perspective on phenotypic plasticity in anti-predator traits

    Author : Jerker Vinterstare; Enhet akvatisk ekologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Phenotypic plasticity; inducible defences; stress physiology; cortisol; immune function; trade-offs; sexual dimorphism; crucian carp; visual ecology; predator-prey interactions; POMC pro-opiomelanocortin ; colour change; eco-immunology; Anti-predator defences; Inducible morphological defence; Phenotypic plasticity; Stress physiology; Cortisol; Immune function; Crucian carp; Predator-prey interactions; Trade-offs; Sexual dimorphism; POMC; Pro-opiomelanocortin; Visual ecology; Eye evolution; Melanin; Eco-immunology; Pace-of-life; Behavioural plasticity;

    Abstract : Almost all species face some degree of predation risk, and, hence, evolution has produced a plethora of anti-predator defences. However, anti-predator strategies require resources, and the prevailing risk of becoming prey is influenced by many factors and rarely constant across time and space. READ MORE

  4. 2. Plant Inducible Responses to Damage: Evolution and Ecological Implications

    Author : Johannes Järemo; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; herbivory; inducible defences; compensation; Ecology; Ekologi;

    Abstract : Abstract Inducible plant responses to damage, i.e. inducible defence responses and compensatory growth responses, are theoretically examined in an evolutionary and ecological context. Inducible defences are generally considered to be beneficial under conditions of low risk of herbivory and when initial damage is moderate. READ MORE

  5. 3. Causes and consequences of individual variation in anti-predator traits

    Author : Kaj Hulthén; Enhet akvatisk ekologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Animal migration; partial migration; individual differences; predator; personality trait; phenotypic plasticity; inducible defence; mortality risk;

    Abstract : Predation imposes a potent evolutionary force on prey, moulding the evolution of traits and diversification of species, and can furthermore have powerful ecological consequences. We know that different species vary in how they cope with their natural enemies, and, consequently, a huge range of anti-predator defences are displayed in nature. READ MORE

  6. 4. Phenotypic plasticity and the evolution of an inducible morphological defence in crucian carp

    Author : Lars Pettersson; Biodiversitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Animal ecology; Benefits; Costs; Predation; Chemical cues; Fish; Djurekologi;

    Abstract : In this thesis, I have investigated factors (cues, benefits, and costs) affecting the evolution of an inducible morphological defence in crucian carp (Carassius carassius). Inducible defences are favoured over permanent defences when prey have reliable cues to detect predators, when defences are effective but costly, and when predation pressure is variable and unpredictable, but sometimes strong. READ MORE

  7. 5. Predator-induced phenotypic plasticity in the marine mussel Mytilus edulis

    Author : Olof Reimer; Christer Brönmark; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Systems Ecology; systemekologi;

    Abstract : In this thesis I investigated whether the risk of predation can induce development of defensive traits in the blue mussel Mytilus edulis, a common species of the temperate seashores. I performed a series of field and laboratory experiments in which I exposed blue mussels to waterborne scents from its main predators, the starfish Asterias rubens, and the shore crab Carcinus maenas. READ MORE