Essays about: "damselfly"

Showing result 1 - 5 of 6 essays containing the word damselfly.

  1. 1. Challenges in a changing climate : The effect of temperature variation on growth and competition in damselflies

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Kim Lea Holzmann; [2022]
    Keywords : ecology; climate change; thermal variation; competition; cannibalism; damselfly;

    Abstract : Climate change is affecting biodiversity on multiple levels all over the world. Concomitant with a higher mean temperature, an increased amplitude of temperature variation is predicted. READ MORE

  2. 2. Wing Shape Variation In A Damselfly: Effects Of Range Margins And Latitude

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Desirée Kristensson; [2021]
    Keywords : damselfly; evolution; distribution; sexual selection; range margins; Lestes sponsa; geometric morphometric;

    Abstract : An optimal wing shape is necessary for the survival of winged insects since it enables different survival strategies and is expected to vary between environments due to different selection pressures. However, few studies have explored wing shape variation across the whole range of a species. READ MORE

  3. 3. Time Constraint and Genetic (Phenotypic) Variation in Wing Shape in a Damselfly Along a Latitudinal Gradient

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Meagan Tunon; [2020]
    Keywords : Damselfly; time constraint; wing shape; morphology; climate change;

    Abstract : This degree project examined the effect of time constraint on wing shape and phenotypic variation in wing shape along a latitudinal gradient in the damselfly species Lestes sponsa. Fore and hind wings from individuals originating from three different latitudes: North (66°N), Central (59°N) and South (54°N) Europe were treated with their native temperature and photoperiod. READ MORE

  4. 4. The antihistamine hydroxyzine and Odonata : Bioaccumulation and effects on predator-prey interactions between dragonfly and damselfly larvae

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Ellinor Bomark; [2014]
    Keywords : Aquatic insects Odonata predator-prey bioconcentration antihistamines;

    Abstract : Through wastewater entering aquatic environments, aquatic insects are continuously exposed to pharmaceuticals including neurologically active antihistamines. The antihistamine hydroxyzine has previously been found to lower activity in damselflies and to reach 2000 times the concentration of surrounding water in damselfly tissue. READ MORE

  5. 5. How two different predators affect size distribution and behavior of an aquatic isopod

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

    Author : Johanna Karlsson; [2011]
    Keywords : Asellus aquaticus; behavior; ecotypic divergence; predation; size selection;

    Abstract : The aquatic isopod Asellus aquaticus can in some lakes be found as two different ecotypes; one in the habitat dominated by reed and one in stonewort stands. These ecotypes have been shown to differ in size, color and behavior. The reed ecotype is larger, darker and more active compared to the stonewort ecotype. READ MORE