Essays about: "CPUE"

Showing result 1 - 5 of 9 essays containing the word CPUE.

  1. 1. How using live bait affects longline bycatch in the artisanal fishing fleet of Costa Rica : The dilemma between live and dead bait

    University essay from Linnéuniversitetet/Institutionen för biologi och miljö (BOM)

    Author : Jonathan Baeck; [2023]
    Keywords : ;

    Abstract : Long-lining is a frequently used method in marine fisheries. Similarly to trawling and nets, also long-lining is associated with bycatch which may have negative impacts on the ecosystems. However, different methods of long-lining may vary in the amount and ratio of bycatch but methods have rarely been compared directly. READ MORE

  3. 2. Willow grouse (Lagopus lagopus) and rock ptarmigan (Lagopus muta) bag statistics and hunting pressure in Jämtland, Sweden : Relationships between CPUE, hunting pressure, different permits and nationality in two time periods; 2004-2012 and 2013-2021.

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

    Author : Pattranit Kwanruen; [2022]
    Keywords : Ecology; Willow grouse; Rock ptarmigan; Lagopus lagopus; Lagopus muta; CPUE; hunting; Sweden;

    Abstract : Willow grouse ( Lagopus lagopus) and rock ptarmigan (Lagopus muta) are popular game birds in Sweden. I have analysed hunting statistics from Jämtland county in Sweden and investigated if there is a significant correlation between willow grouse density and Catch-Per-Unit-Effort (CPUE) by nationalities and type of permits. READ MORE

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

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

    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

  5. 4. Influence of reed (Phragmites australis) belts in the Baltic Sea archipelago on pike (Esox lucius) and other coastal fish species

    University essay from SLU/Dept. Of Aquatic Resources

    Author : Niklas Niemi; [2020]
    Keywords : Reed; Phragmites; Pike; Baltic Sea; spatial distribution; habitat utilization; reed expansion; reed management;

    Abstract : Eutrophication, near shore building and human disturbances by dredging and shore alteration have led to increased expansion of the common reed (Phragmites australis) in the archipelago of the Baltic Sea. Reed has an important ecological function such as nursery habitat for many fish species. READ MORE

  6. 5. 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