Search for dissertations about: "visual ecology"
Showing result 1 - 5 of 41 swedish dissertations containing the words visual ecology.
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1. Cryptic coloration, microhabitat choice and polymorphism in Idotea baltica (Isopoda)
Abstract : In this thesis I have studied cryptic coloration, microhabitat use and colour polymorphism in the marine isopod Idotea baltica. In the Baltic Sea it lives and feeds mainly on the seaweed Fucus vesiculosus, which in sheltered sites usually is whitespotted on its lower parts due to epizoites. The white-spotted morph of I. READ MORE
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2. Fish foraging under visual constraints
Abstract : Visual conditions are changing in several different ways. Some lakes are getting turbid due to eutrophication or erosion while others are getting browner due to brownification. These two types of visual degradation results in completely different optical properties of lakes. READ MORE
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3. Ecology of red admiral migration
Abstract : The red admiral (Vanessa atalanta) is a migratory butterfly that can be found in North America, North Africa, Europe and some parts of Asia. In Europe the main part of the population spend winter in the Mediterranean region and the following spring leave this area to breed further to the north. READ MORE
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4. Life at stake when playing hide and seek : Concealing effects of prey colouration and visual backgrounds
Abstract : A prey animal can use different strategies to avoid becoming eaten by predators. One such widely recognised strategy is the use of body colouration to decrease the risk of becoming detected, i.e. cryptic colouration. READ MORE
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5. Odour-mediated nectar foraging in the silver Y moth, Autographa gamma
Abstract : It is well established that floral odours play a significant role in the nectar foraging behaviour in Lepidoptera and other insect orders. Floral odour may elicit searching, alighting and feeding behaviours alone or in concert with visual stimuli. READ MORE