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.
Results
Showing 1 to 20 of 72 for “"marine invertebrates"”.
-
Reproductive success in Antarctic marine invertebrates
The nearshore Antarctic marine environment is unique, characterised by low but constant temperatures that contrast with an intense peak in productivity. As a result of this stenothermal environment, energy input has a profound ecological effect. These conditions have developed over several millions …
-
Biogeographical patterns of southern African marine invertebrates
Biogeography is defined as the study of life, in a spatial and temporal context, with respect to the analysis and explanation of patterns for a given area. The tendency for species richness and diversity to increases towards the equator, where both peak, is a much debated and tested pattern. …
-
New cytotoxic natural products from North-Eastern Pacific marine invertebrates
… into the chemistry of four species of marine invertebrates which were found to produce cytotoxic crude extracts (ED50 against the L1210 murine leukemia cell line 5 30 pg/mL) led to the isolation of nine new and eleven previously known secondary metabolites. The structures of the novel …
-
Exploring circadian rhythms, food intake, and their interactions in marine invertebrates
… while there are major knowledge gaps for marine invertebrates. My dissertation focuses on the interactions of circadian rhythms and metabolism in three marine invertebrate systems using a combination of behavioral, molecular, and bioinformatic approaches. In Chapter 2, to understand how …
-
Dynamic lighting and its impact on the behaviour of marine invertebrates
… information detection and behaviour of three marine invertebrates, the common cuttlefish *Sepia officinalis*, the shore crab *Carcinus maenas*, and the brown shrimp *Crangon crangon*. In Chapter 2, I investigated whether caustics impaired the hunting success of cuttlefish. By exposing …
-
Exploring circadian rhythms, food intake, and their interactions in marine invertebrates
… while there are major knowledge gaps for marine invertebrates. My dissertation focuses on the interactions of circadian rhythms and metabolism in three marine invertebrate systems using a combination of behavioral, molecular, and bioinformatic approaches. In Chapter 2, to understand how …
-
Transport and retention of benthic marine invertebrates in the Southern Tauranga Basin
… individual and tidal flows. Many coastal benthic marine invertebrate populations have been considered open because of the dispersal potential of a pelagic larval phase, with populations maintained by an external supply of recruits. However, for estuarine populations, recent evidence has suggested …
-
Impacts of ocean acidification and other (global change) stressors on marine invertebrates
The hypervariable nearshore marine ecosystem is home to intrinsic stressors for marine organisms. Global climate change and human activity are already affecting this aquatic environment and are expected to intensify over the next decades. These diverse changes include a rise in global temperature …
-
Benthic assemblage development and larval ecology of marine invertebrates at Adelaide Island, Antarctica
… the first regularly resurveyed study of marine benthic colonisation processes at a location within the Antarctic Circle (660 30' S). Invertebrate assemblages on hard substrata were studied at 8 m and 20 m depths at three locations near Rothera Point, Adelaide Island (670 34' S, 68° 07' …
-
Hybridization And Introgression In Marine Invertebrates: Population Genomics Of Phymactis Papillosa And Asterias Sea Stars
… are evolutionary significant processes in marine invertebrates (Sanford & Kelly,2011) yet genome-wide investigations of gene flow in these taxa remain limited relative to vertebrate systems (Marchi et al., 2021). This thesis presents genomic analyses of hybridization and introgression in …
-
Evaluation of spatial and temporal models to assess the bioaccumulation of trace metals in marine invertebrates
This thesis aims at providing concepts and information necessary for the assessment of data from monitoring programmes. Therefore, the applicability of further species for biomonitoring was investigated, e.g. of the cockle Cerastoderma edule and the brown shrimp Crangon crangon as important …
-
Exploring the molecular diversity and biomedicinal potential of marine invertebrates and South African actinomycetes for tuberculosis drug discovery
… and biodiversity-rich ecosystems such as the marine environment and South Africa (SA)'s fauna and flora have been a source of new bioactive natural products (NPs). A range of marine invertebrates and SA actinomycetes were therefore studied for the discovery of new antimycobacterial NPs. …
-
Assessing anthropogenic noise impacts and relevant soundscape cues for marine invertebrates: leveraging squid and coral reefs as model systems
Sound is utilized by marine animal taxa for many ecologically important functions, and these taxa are vulnerable to adverse effects of anthropogenic noise on hearing and behavior. However, little is known about marine invertebrates’ responses to anthropogenic noise, and the ambient environmental …
-
In vitro screening of crude extracts and pure metabolites obtained from marine invertebrates for the treatment of breast cancer
… extracts and pure metabolites obtained from marine invertebrates collected from the offshore waters of British Columbia, Papua New Guinea and Sri Lanka had previously been shown to exert cytotoxic activity in the in vitro L1210 leukemic bioassay. For this thesis, these samples were screened …
-
Assessing anthropogenic noise impacts and relevant soundscape cues for marine invertebrates: leveraging squid and coral reefs as model systems
Sound is utilized by marine animal taxa for many ecologically important functions, and these taxa are vulnerable to adverse effects of anthropogenic noise on hearing and behavior. However, little is known about marine invertebrates’ responses to anthropogenic noise, and the ambient environmental …
-
Characterising Antarctic marine invertebrate microbiomes and their antimicrobial potential
… warming that will negatively impact endemic marine biodiversity. Antarctic marine invertebrates living in the near-shore are likely to be affected profoundly by warming-related changes, and microbes could help their hosts respond to the demands of environmental change. Moreover, their …
-
Ecology and population structure of Vibrionaceae in the coastal ocean
… wide range of environmental categories, such as marine invertebrates or particles in the water column. Additionally, it seeks to determine whether in situ population distributions directly result from a competitive advantage over other Vibrio populations. This was investigated by in vitro …
-
Ecology and population structure of vibrionaceae in the coastal ocean
… wide range of environmental categories, such as marine invertebrates or particles in the water column. Additionally, it seeks to determine whether in situ population distributions directly result from a competitive advantage over other Vibrio populations. This was investigated by in vitro …
Page 1 of 4