Sökning: "diel phase"

Hittade 2 uppsatser innehållade orden diel phase.

1. 1. Pearls as bycatch mitigation strategy for Harbour porpoise (Phoecena phoecena)

   Master-uppsats, SLU/Dept. Of Aquatic Resources

   Författare :Sara Gustafsson; [2020]
   Nyckelord :harbour porpoise; bycatch mitigation; acoustic reflector; pearl; gillnet; F-POD; click rate; click behaviour; inter-click-interval; terminal buzz; diel phase; GAM;

   Sammanfattning : One of the major threats to harbour porpoise population sustainability is thought to be the high incidence of bycatch specifically in gillnets. This study aims to examine the use of acrylic class pearls developed in an earlier study as acoustic reflectors on gillnets in an effort to increase their visibility to echolocating harbour porpoises in the lumpsucker fishery in Kattegatt. LÄS MER

3. 2. Response of Daphnia magna from Natural Populations to Ultraviolet Radiation

   Master-uppsats, Lunds universitet/Examensarbeten i biologi

   Författare :Luo Zheng; [2018]
   Nyckelord :Biology and Life Sciences;

   Sammanfattning : Diel vertical migration (DVM) is performed by various zooplankton taxa. The general movement pattern of DVM has been well studied while the possible clonal differences of this movement largely remain unknown. My master thesis focus on investigating the effects of environmental stressors on Daphnia magna strains isolated from natural populations. LÄS MER