Search for dissertations about: "species discrimination"

Showing result 1 - 5 of 33 swedish dissertations containing the words species discrimination.

2. 1. The evolutionary ecology of niche separation : Studies on the sympatric butterflies Leptidea sinapis and Leptidea reali

   Author : Magne Friberg; Wiklund Christer; John N. Thompson; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Lepidoptera; ecological character displacement; reproductive isolation; species discrimination; habitat; host plant; life history; sexual selection; female choice; Biology; Biologi; zoologisk ekologi; Animal Ecology;

   Abstract : Studies of ecology and evolution have become largely integrated, and increasing attention is paid to the role of ecology for speciation and post speciation divergence. In this thesis I have applied an in-depth approach studying the ecology of a butterfly species pair; the morphologically virtually identical sister-species, the Wood white (Leptidea sinapis) and Reál’s wood white (Leptidea reali). READ MORE

4. 2. Evolution of Mimicry and Aposematism Explained: Salient Traits and Predator Psychology

   Author : Baharan Kazemi; Olof Leimar; Gabriella Gamberale-Stille; Mike Speed; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; imperfect mimicry; mimicry evolution; predator learning; discrimination; generalization; salience; overshadowing; aposematism; warning signal evolution; generalization bias; peak shift; etologi; Ethology;

   Abstract : Aposematic species have evolved conspicuous warning signals, such as bright colors and striking patterns, to deter predators. Some edible and harmless species take advantage of this deterrent effect by mimicking their appearance. Mimicry is a great example of how natural selection produces remarkable adaptations. READ MORE

5. 3. Functionalised surfaces for bacterial discrimination

   Author : Mohsen Golabi; Anthony Turner; Edwin Jager; Richard Luxton; Linköpings universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biosensorer; Bakterier; Mönsterigenkänning;

   Abstract : Bacterial detection and identification is a critical step in many arenas, including food and water safety, clinical diagnostics, bioprocess control and biosecurity. Social hygiene has a direct correlation with the strict control of microorganisms in these fields. READ MORE

6. 4. The link between brain size, cognitive ability, mate choice and sexual behaviour in the guppy (Poecilia reticulata)

   Author : Alberto Corral López; Niclas Kolm; Janette Boughman; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; sexual selection; artificial selection; brain evolution; optomotor test; decision-making; discrimination; assessment; optimal decisions; rational choice; behavioural flexibility; expensive tissue; predation; sex ratio; OSR; maintenance of variation; etologi; Ethology;

   Abstract : Competition over access for mates has led to the evolution of many striking examples of morphological traits and behaviour in animals. The rapid development of the sexual selection field in recent decades have dramatically advanced our understanding of what traits make individuals more successful in attracting mates and how preferences for mates evolve over time. READ MORE

7. 5. Clearing up Culex Confusion : A Basis for Virus Vector Discrimination in Europe

   Author : Jenny C. Hesson; Jan O. Lundström; Örjan Östman; Åke Lundkvist; Anssi Laurila; Laura D Kramer; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Culex torrentium; Culex pipiens; mosquitoes; vector; ornithophilic; Sindbis virus; West Nile virus; Populationsbiologi; Population Biology;

   Abstract : Mosquito species of the Culex genus are the enzootic vectors for several bird-associated viruses that cause disease in humans. In Europe, these viruses include Sindbis (SINV), West Nile and Usutu viruses. The morphologically similar females of Cx. torrentium and Cx. READ MORE