Essays about: "Lepidoptera"

Showing result 11 - 15 of 27 essays containing the word Lepidoptera.

  1. 11. Mobility, habitat selection and population connectivity of Lycaena helle in central Sweden : implications for conservation

    University essay from SLU/Dept. of Ecology

    Author : Hanna Modin; [2018]
    Keywords : Lycaena helle; violet copper; Lepidoptera; Lycaenidae; mobility; dispersal; resource selection function; habitat selection; connectivity; metapopulation; stepping stone;

    Abstract : Lycaena helle is an endangered butterfly that is mainly threatened by habitat degradation and fragmentation. For all species with a fragmented distribution, knowledge about mobility, habitat requirements and connectivity is key to developing successful conservation strategies. READ MORE

  3. 12. Transgenerational phenotypic plasticity: can parental host plant experience affect the phenotype of the offspring? : a study in behavior and physiology in Spodoptera littoralis

    University essay from SLU/Dept. of Biosystems and Technology (from 130101)

    Author : Axel Rösvik; [2015]
    Keywords : transgenerational phenotypic plasticity; Spodoptera littoralis; performance; migration; preference;

    Abstract : The Darwinian theory of natural selection first popularized by Charles Darwin in the mid-19th century has been widely accepted as one of the key mechanisms of evolution. However, before Darwin other scientists such as Jean-Baptiste de Lamarck had their theories about evolution. READ MORE

  4. 13. Butterfly monitoring in Sweden reveals changes in occurrences over a five-year period

    University essay from Linköpings universitet/Biologi; Linköpings universitet/Tekniska fakulteten

    Author : Vibeke Gunneng; [2015]
    Keywords : Butterfly; Lepidoptera; monitoring; semi-natural grassland; Sweden;

    Abstract : Many of the European butterfly species have declined rapidly over the past decades. The cause is thought to be habitat loss due to factors such as increased tree cover, afforestation and intensified agriculture. READ MORE

  5. 14. The importance of vegetation height and flower abundance for Swedish butterfly species in semi-natural grasslands

    University essay from Linköpings universitet/Institutionen för fysik, kemi och biologi; Linköpings universitet/Tekniska högskolan

    Author : Zandra Löfqvist; [2014]
    Keywords : Vegetation height; flower abundance; nectar; Butterfly; Lepidoptera; Semi-natural grassland; monitoring; Sweden;

    Abstract : Changed management of semi-natural grasslands is thought to be one important factor for explaining the decline of butterfly populations in Sweden and the rest of Europe. This study explores how vegetation height, variation in vegetation height and flower abundance can help predict the occurrence of butterfly species in semi-natural grasslands in southern Sweden. READ MORE

  6. 15. Female mate choice and modulation of oviposition preference in the moth Spodoptera littoralis

    University essay from SLU/Dept. of Biosystems and Technology (from 130101)

    Author : Amanda Karlström; [2013]
    Keywords : Spodoptera littoralis; female mate choice; precopulatory assessment; host plant; selection; oviposition; Aedes aegypti; experience;

    Abstract : In this thesis, two aspects of reproductive behaviour in the Egyptian cotton leafworm, Spodoptera littoralis (Lepidoptera:Noctuidae) were studied. The first was whether female moths make a mate choice based on precopulatory assessments of male mating partners, and the second whether larval food plant experience of an ectoparasite modulates the female choice of oviposition site. READ MORE