Sökning: "time foraging"
Visar resultat 1 - 5 av 105 uppsatser innehållade orden time foraging.
1. Diving Deep: Seabird foraging tactics and local prey field
Master-uppsats, SLU/Dept. Of Aquatic ResourcesSammanfattning : Foragers in patchy environments need to decide what patches to use and how to allocate their time between them. Optimal foraging theory describes these choices through the relationship between energy expenditure and energy gain. LÄS MER
2. Egg-laying and nesting behavior of common eider at Stora Karlsö
Kandidat-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildningSammanfattning : The population of common eider (Somateria mollissima) has suffered a dramatic decline in several breeding locations since the 1990s. Predation is described as one of the main reasons, along with other suggested explanations such as food shortage, environmental pollutants, and thiamine shortage. LÄS MER
3. Clear as a Bell : A sensory and aesthetic history of timekeeping and eco-social relations in Uppsala and the world
Master-uppsats, Uppsala universitet/Institutionen för arkeologi och antik historiaSammanfattning : Methods of timekeeping have changed drastically throughout history and especially in the last century, as has humanity’s relationship to nature. Building upon existing research into the history of clocks and clock-time this study sketches a long-term chronology with a novel environmental, sensory, and aesthetic analysis. LÄS MER
4. Investigating the influence of the tidal regime on harbour porpoise Phocoena phocoena distribution in Mount’s Bay, Cornwall
Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskapSammanfattning : Investigating the influence of the tidal regime on harbour porpoise Phocoena phocoena distribution in Mount’s Bay, Cornwall Abstract Unintentional by-catch in fishing gear is a significant cause of mortality of harbour porpoises in UK waters. Understanding the spatial distribution of harbour porpoises at fine scales and how this changes over time is essential when trying to understand where these lethal interactions might occur. LÄS MER
5. Optimal foraging in an Arctic herbivore : How does the foraging behaviour of Svalbard reindeer (Rangifer tarandus platyrhynchus) respond to seasonal changes from summer through autumn of the Arctic tundra?
Master-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskapSammanfattning : Foraging decisions of large herbivores can be affected by many factors and have great effect on both above- and below-ground ecosystems. Here, I determine to which degree temporal (seasonality), or spatial (habitat) factors influence the foraging behaviour of Svalbard reindeer (Rangifer tarandus platyrhynchus) and asses if small-scale foraging behaviour correlates with an animals’ patch residence time. LÄS MER