Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"epipelagic"”.
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Nutritional ecology of Agalma okeni and other siphonophores from the epipelagic western North Atlantic Ocean
The feeding and fishing behavior of siphonophores in their natural environment: was observed by SCUBA diving at 171 stations in warm-water areas of the Western North Atlantic Ocean. Calycophorae and Physonectae showed a two-phase cycle of fishing and swimming. The fishing posture of a siphonophore …
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Evolution and Ecology of Flyingfishes (Teleostei:Exocoetidae)
… (Teleostei: Exocoetidae) are a family of 53 epipelagic marine species distributed throughout tropical and subtropical surface waters. They form a key mid-trophic link between zooplankton and predators, and have evolved special adaptations to survive in the open ocean. However, little is known …
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Trophic Ecology of Mesopelagic Fish Larvae and Juveniles in the Northern Gulf of Mexico
… migrations) between the deep-pelagic and epipelagic environments with respect to trophic interactions, nutrient cycling, and carbon sequestration. In this study, archived plankton samples collected during 2010 and 2011 were used to describe the trophic ecology of the dominant deep-pelagic …
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Eukaryotic Microbes in the Deep Sea: Abundance, Diversity, and the Effect of Pressure
… by morphology when stained with DAPI) . In the epipelagic 100 m samples, only 20% of total eukaryotes fall into one of these groups. This difference is driven largely by the morphotype I call the "split nucleus", which does not decrease in absolute abundance with depth, instead increasing in its …
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Movements and oceanographic associations of large pelagic fishes in the North Atlantic Ocean
… scattering layer communities and deep-diving, epipelagic predators. Together, these studies demonstrate the breadth and depth of information that can be garnered through the integration of traditional animal tagging and oceanographic research with cutting-edge analytical approaches and …
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Movements and oceanographic associations of large pelagic fishes in the North Atlantic Ocean
… scattering layer communities and deep-diving, epipelagic predators. Together, these studies demonstrate the breadth and depth of information that can be garnered through the integration of traditional animal tagging and oceanographic research with cutting-edge analytical approaches and …
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Microbial glycerolipids in the global ocean: environmental controls and sinking flux dynamics
… Using this dataset of samples mostly from the epipelagic, I find that water temperature is a major controlling factor on fatty acid saturation state and hypothesize this derives from known biophysical constraints on cell membranes. I extend this analysis further to investigate links between …
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Are Cape Cormorants (Phalacrocorax capensis) losing the competition? Dietary overlap with commercial fisheries
… and those caught by the purse-seine fishery. Epipelagic fish (Anchovy, Sardine, Horse Mackerel and Redeye) dominated the diet of Cape cormorants at all sites. Anchovy was the most important in the diet in all years except in 1992 and 1993, when Sardine dominated the diet, and in 2007 when …
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The ecology of colonial radiolarians : their colony morphology, trophic interactions and associations, behavior, distribution, and the photosynthesis of their symbionts
… modern biologists. Colonies were found on 98% of epipelagic diving stations in the period from 1977 to 1979. Measured abundances ranged from .04 to 540 colonies per m3. Colony morphology of common genera and species is described and three new shell-less species which reach a length in excess of 1 …
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From brain development to reproductive axis: an integrated study of the nervous system in cartilaginous fish
… oblongata and reduced telencephalon, whereas epipelagic species exhibited enlarged telencephala and cerebella, with coastal species occupying intermediate positions. These results demonstrate that cerebrotypes identified at global scales are also recovered at a regional Mediterranean scale. …
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UNDERSTANDING OF THE VARIABILITY OF PHYTOPLANKTON ECOSYSTEM FUNCTION PROPERTIES: A SYNERGISTIC USE OF REMOTE SENSING AND IN SITU DATA
… extent of these blooms. Diatom abundance in the epipelagic zone of the Northern North Atlantic was mainly driven by SST. The ANNs indicated that higher SSTs could lead to a rapid decrease in diatom abundance; increased SST can stratify the water column for longer preventing nutrients from being …
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The spatial and temporal abundance patterns of chaetognaths in the western North Atlantic Ocean
… other regions. Nine species were classified as epipelagic, four were classified as mesopelagic, and five species were classified as bathypelagic. Diel vertical migrations were not detected for any of the species, but due to the depth intervals sampled, migrations of less than 100 m were not …