Essays about: "predator-prey"

Showing result 21 - 25 of 28 essays containing the word predator-prey.

  1. 21. Temporal correlation between the acoustic activity of harbor porpoise and the movement activity of their prey species at Kullaberg, Sweden

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Emily Montgomerie; [2015]
    Keywords : Harbor porpoise; herring; cod; predator-prey relationship; Kullaberg;

    Abstract : The harbor porpoise is considered a threatened species in Swedish waters. A full understanding of its ecology and relationship to other species is important when designing effective conservation plans. READ MORE

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

    University essay from 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

  4. 23. Upper Cretaceous coprolites from the Münster Basin (northwestern Germany) : a glimpse into the diet of extinct animals

    University essay from Lunds universitet/Geologiska institutionen

    Author : Stavros Anagnostakis; [2013]
    Keywords : koproliter; carnivorous vertebrates; Germany; Münster Basin; Coprolites; Upper Cretaceous; sen krita; Münsterbassängen; Tyskland; rovlevande vertebrater; Earth and Environmental Sciences;

    Abstract : En omfattande samling koproliter från tre lokaler med sediment från sen kritatid i Münsterbassängen (nordvästra Tyskland) har studerats med en mängd olika analytiska tekniker med avsikten att belysa urtida trofiska nivåer och relationen mellan rovdjur och bytesdjur. Den fosfatiska sammansättningen, inneslutningar av benmaterial, storlek och form tyder på att de flesta eller samtliga koproliter producerades av rovlevande vertebrater. READ MORE

  5. 24. The Evolution of Stability in a Stochastic Predator-Prey System

    University essay from Lunds universitet/Examensarbeten i biologi

    Author : Simon Fors; [2013]
    Keywords : Biology and Life Sciences;

    Abstract : Populärvetenskaplig sammanfattning Evolution av stabilitet i ett rovdjur-bytessystem För att göra en matematisk modell av hur rovdjur och byten växelverkar med varandra ställer man upp varsin ekvation för populationernas tillväxthastighet. Dessa beskriver hur rovdjuren och bytena beror av varandra och tiden. READ MORE

  6. 25. Determinants of winter kill rates of wolves in Scandinavia

    University essay from SLU/Dept. of Wildlife, Fish and Environmental Studies

    Author : Mattia Colombo; [2013]
    Keywords : functional response; GPS technology; handling time; kill rate; moose; movement patterns; predation events; searching time;

    Abstract : Winter wolf (Canis lupus) kill rates on moose (Alces alces) on the Scandinavian Peninsula are high and subject to strong variation, compared to other boreal wolf-moose systems. A more detailed understanding of factors influencing this variation is crucial for management and conservation of the Scandinavian wolf population. READ MORE