Essays about: "population densities"

Showing result 21 - 25 of 82 essays containing the words population densities.

  1. 21. Matching efficiency in Sweden, 2000 to 2018

    University essay from Umeå universitet/Nationalekonomi

    Author : Gustav Järvenson; [2020]
    Keywords : ;

    Abstract : The term matching efficiency is a term that describes how efficient the search and matching process of the labour market is functioning. A high matching efficiency is sought-after since it means shorter unemployment spells and more productive firms. The matching function is the tool that is most commonly used to estimate the matching efficiency. READ MORE

  3. 22. Responses to declining zoobenthos abundance : Changes over time in diet and growth of Arctic charr (Salvelinus alpinus)

    University essay from

    Author : Douglas Skarp; [2020]
    Keywords : charr; zoobenthos; growth; diet;

    Abstract : A decline in the density of zoobenthos has taken place in Lake Abiskojaure in the northern Swedish mountains between 1988 and 2019 but no response can be seen in the abundance (CPUE) of Arctic charr (Salvelinus alpinus) that feed mainly on benthic invertebrates. To evaluate if possible shifts in resource use of charr explain this lack of change in population abundance, stomach contents (i. READ MORE

  4. 23. Fly larvae composting of fibrous food industry waste : impact of pre-treatment

    University essay from SLU/Department of Molecular Sciences

    Author : Robert Almqvist; [2020]
    Keywords : fly larvae; composting; BSFL; waste; recycling; larvae;

    Abstract : With increasing population worldwide comes higher demands of food and greater waste generation. Effective ways for safe nutrient recycling and waste treatment are thus needed to minimize the human impact on the environment. READ MORE

  5. 24. The role of agroforestry tree species in biocontrol of the cabbage pest Plutella xylostella : a field study in Kenya

    University essay from SLU/Dept. of Ecology

    Author : Nadja Kvick Nastaj; [2020]
    Keywords : agroforestry; Plutella xylostella; biocontrol;

    Abstract : Pest control in agriculture is a necessity and the use of chemicals is the method by choice for most farmers. But the use of chemicals comes with a price; the pests develops resistance and the chemicals pollutes the environment. It is therefore of urgent importance to shift pest control from chemicals to other methods. READ MORE

  6. 25. Declining abundance and shifting distribution for Antarctic krill, Euphausia superba, in the western Antarctic Peninsula

    University essay from Lunds universitet/Examensarbeten i biologi

    Author : Kerstin Holmström; [2020]
    Keywords : Biology and Life Sciences;

    Abstract : Antarctic krill, Euphausia superba, a polar ocean specialist, thrives in the Antarctic severe physical conditions. The krill life cycle consists of strategies that have enabled and supported the species’ dominance of the Antarctic Ocean. Sea Ice extent and duration creates condition that are crucial for survival of the Furcilia larvae. READ MORE