Sökning: "scats"

Hittade 4 uppsatser innehållade ordet scats.

  1. 1. Development of northern pike (Esox lucius) populations in the Baltic Sea, and potential effects of grey seal (Halichoerus grypus) predation

    Master-uppsats, SLU/Dept. Of Aquatic Resources

    Författare :Rebecka Svensson; [2021]
    Nyckelord :diet analysis; ; marine mammals; predator-prey; socio-economic; sport fishing; recreational fisheries;

    Sammanfattning : Worldwide, marine mammal populations are increasing after considerable efforts to turn the downward trends caused by hunting, accidental mortality and pollution. The ecosystem effects from the increases of these top predators may be pronounced, but are in most cases poorly known. LÄS MER

  3. 2. Risky places and risky times : vegetation cover and carnivore olfactory cues influence patch selection and antipredator behavior of African ungulates

    Master-uppsats, SLU/Dept. of Wildlife, Fish and Environmental Studies

    Författare :Noé Müller-Rowold; [2017]
    Nyckelord :predation risk; African ungulates; savanna; visibility; scats; Hluhluwe-iMfolozi; patch selection; large carnivore; hunting modes; vigilance; group size;

    Sammanfattning : Foraging behaviour and vigilance of African ungulates are considered to be influenced by their perception of predation risk. In this experiment, I tried to obtain a better understanding of the relative importance of spatial and temporal drivers of perceived predation risk for African ungulates of various sizes. LÄS MER

  4. 3. Experimental release of hand-reared wolf pups in Tver region (Russia): food habits, movement patterns and fear of humans.

    Master-uppsats, Zoologi

    Författare :camille Fraissard; [2011]
    Nyckelord :Canis lupus; diet; GPS-Argos telemetry; hand-reared wolf pups; movement patterns; reintroduction; scat-analysis;

    Sammanfattning : Studying the reintroduction of hand-raised wolves may embrace several interests such as deepening knowledge on wolf biology and allowing a controlled release in isolated populations in need of genetic influx. Studies on hand-raised wild animals, showing successful reintroduction, suggested that young released wolves might be able to survive in the wild without previous fastidious training. LÄS MER

  5. 4. Födosammansättning hos gråsäl (Halichoerus grypus) samt test av flotte för insamling av sälfekalier.

    Magister-uppsats, Naturvetenskapliga institutionen

    Författare :Christian Lagström; [2008]
    Nyckelord :grey seal; food preferences; ecosystem; Baltic Sea; otoliths; floating platform; scats; cormorants;

    Sammanfattning : During the 1960´s and 1970´s the number of grey seals in the Baltic Sea was decreasing rapidly, mostly due to hunting and toxic substances like DDT and PCB. When hunting became less intense and toxic substances decreased in the environment the grey seal population started to increase. LÄS MER