Essays about: "Resource polymorphism"

Showing result 1 - 5 of 7 essays containing the words Resource polymorphism.

  1. 1. Associations between body size polymorphism in Arctic charr and benthic invertebrate communities – clues to mechanisms for population differentiation?

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

    Author : Andreas Sund; [2022]
    Keywords : arctic charr; benthic invertebrates; polymorphism;

    Abstract : Many fish populations in the north have divided into coexisting ecotypes that differ in body size. While such polymorphic fish populations have been studied for many years, the understanding of how different types of selection contribute to the formation of dwarf- and giant ecotypes remains limited. READ MORE

  3. 2. An Analysis of Tit for Tat in the Hawk-Dove Game

    University essay from Mälardalens högskola/Akademin för utbildning, kultur och kommunikation

    Author : Felicia Modin; [2021]
    Keywords : Game theory; hawk-dove game; Axelrod s tournament; Tit for Tat;

    Abstract : In Axelrod's tournaments of the Prisoner's Dilemma, carried out in the 1980s, a strategy called Tit for Tat was declared the winner, and it has since then been thought of as the strategy to use to do as well as possible in different situations. In this thesis, we investigate whether Tit for Tat will still do as well if we change the game to the Hawk-Dove Game. READ MORE

  4. 3. The influence of northern pike on the diet of Eurasian perch

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

    Author : Karlberg Ylva; [2017]
    Keywords : Perca fluviatilis; Esox lucius; Coregonus lavaretus; trophic interactions; facilitation; Eurasian perch; northern pike; whitefish; Perca fluviatilis; Esox lucius; Coregonus lavaretus; trofiska interaktioner; facilitering; abborre; gädda; sik;

    Abstract : Top predators in aquatic ecosystems often have strong top-down effects on the ecosystem. Northern pike (Esox lucius) has been documented to cause whitefish (Coregonus lavaretus) populations to diverge into different ecomorphs. READ MORE

  5. 4. Detecting whitefish divergence using remains of Cladocerans in lake sediment : Tracking shifts in the predation regime on Bosmina by measuring defense structures

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

    Author : Anna Swärd; [2014]
    Keywords : Bosmina; Leptodora; Bythotrephes; pike; whitefish; predation; resource polymorphism; divergence; competitive release; lake sediment;

    Abstract : Predation by northern pike is believed to have initiated a divergence in whitefish into several different morphs, differing in size, habitat use and growth rate.  The development of a small pelagic zooplankton feeding morph is expected to have large impacts on the zooplankton community. READ MORE

  6. 5. Size selective predation of pike on whitefish : The effects on resource polymorphism in Scandinavian whitefish populations

    University essay from Institutionen för ekologi, miljö och geovetenskap

    Author : Johan Fahlman; [2014]
    Keywords : pike; whitefish; predation; resource polymorphism; divergence;

    Abstract : The mechanisms behind speciation have been subject of debate for centuries. The presence of resource polymorphism has been discovered to play a significant part in this process, and has been proven to induce phenotypic and genetic divergence. READ MORE