Global ETD Search
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Showing 1 to 8 of 8 for “"Vatnalíffræði"”.
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Asynchrony in the dynamics of chironomids across six locations in northeastern Iceland
Simultaneously studying population dynamics at multiple locations can provide insights into the ecological processes shaping changes in the abundances of species. Here, I examine 18-year time series of abundances of non-biting midges (Diptera: Chironomidae) from window trap samples at five lakes in …
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The importance of sandeel (Ammodytes marinus) for minke whales (Balaenoptera acutorostrata) and white-beaked dolphins (Lagenorhynchus albirostris) in Faxaflói Bay, Iceland
Faxaflói Bay, located at the southwest coast of Iceland, has been noted as important feeding grounds for both minke whales (Balaenoptera acutorostrata) and white-beaked dolphins (Lagenorhynchus albirostris). These two cetacean species are both known to prey on lesser sandeels (Ammodytes marinus), a …
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Plasticity of trait divergence in threespine stickleback (Gasterosteus aculeatus) from Lake Mývatn, Iceland
Lake Mývatn is one of the best-studied ecosystems in Iceland showing strong environmental gradients (e.g. in temperature, substrate) and spatial and temporal differences in invertebrate composition. Many invertebrates groups are found in the lake, in particular chironomid midges and benthic …
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Crustacea Zooplankton Communities in Icelandic Lakes Comparison Over Time
This study examines freshwater Crustacea zooplankton communities in 19 Icelandic lakes, focusing on Copepoda and Cladocera. Zooplankton form a key trophic link in freshwater ecosystems, grazing on phytoplankton and serving as prey for higher trophic levels. Monitoring biodiversity in Arctic and …
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Vocalizing Behavior in Killer Whales (Orcinus orca) – an Evolutionary Account
In this thesis, we compare human language, as defined by Noam Chomsky in his biolinguistic account of language, with killer whale (Orcinus orca) vocalizations and what we call the orca vocalization and orca symbolic vocalization systems. We postulate hypothetical orca counterparts of the elements …
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Biological diversity of epibenthic invertebrates in relation to environmental factors in lava caves around Lake Mývatn (N-E Iceland)
Biodiversity, and its understanding and maintenance, are nowadays concerns in many fields of sciences. In freshwater, epibenthic invertebrates are important for their environment as consumers at intermediate trophic level and as food resources for other organisms. Their sensitivity to environmental …
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Relationships between phenotype, diet, and individual specialization of threespine stickleback (Gasterosteus aculeatus) in Lake Mývatn, Iceland
Lake Mývatn, Iceland, is a well-studied lake that has several types of habitats and strong temporal dynamics. The threespine stickleback (Gasterosteus aculeatus) population of the lake has been monitored for decades. Within the population is high gene flow, the phenotype is variable, the population …
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Effects of environmental enrichment on personality traits in juvenile Arctic charr (Salvelinus alpinus) : interplay with brain morphology, growth performance and implication for welfare
Arctic charr (Salvelinus alpinus) is the northernmost distributed freshwater fish and considered to be the most cold-adapted salmonid. In overall, Iceland is graded as the largest worldwide producer and its system considered as sustainable farmed system. Despite that, no study has yet targeted the …