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 22 for “"Larval settlement"”.
-
Sediment-associated cues for larval settlement of Polydora cornuta and Streblospio benedicti (Polychaeta, Spionidae)
… hypothesis was tested in still water laboratory settlement assays with and without choice option for larvae of two spionid polychaetes with indirect development: Polydora cornuta and Streblospio benedicti. Larvae were able to accept or reject attractive and unattractive sediment qualities in the …
-
Determining larval settlement, post-settlement and weaning substrates and regimes for the sea urchin Tripneustes gratilla in intensive aquaculture
… due to a bottleneck in production during the settlement and post-settlement phases. In this study, larval settlement, post-settlement growth, and weaning regimes were investigated in the collector urchin, Tripneustes gratilla. Two cohorts of urchins were spawned for two separate growth trials. …
-
Do microbial or biochemical settlement cues on the sediment surface mediate larval settlement of Polydora cornuta and Streblospio benedicti (Polychaeta, Spionidae)?
… cornuta and Streblospio benedicti with indirect larval development were found in sediments of tidal flats in the German Wadden Sea. These patterns were not explicable through grain size or other sediment parameters. This led to the hypotheses that active site selection and initial settlement of …
-
The Role of Backreef Soundscapes and their Spatial Structure for Recruitment of Tropical Marine Larvae
… over which acoustic cues are attractive to settlement-stage larvae - is generally unknown. I examined this phenomenon in a region of the Florida Keys where mass sponge die-offs have diminished both underwater soundscapes and larval settlement. The absence of pronounced hardbottom-associated …
-
Characterization of Soundscapes in Shallow Water Habitats of the Florida Keys (USA) and Their Influence on the Settlement of Larval Fish and Invertebrates
… restoration on underwater soundscapes and larval recruitment. I had four main objectives: (1) characterize the underwater soundscapes of three near-shore, benthic habitats: mangrove islands, seagrass meadows, and hard-bottom (Chapter 2); (2) quantify larval settlement within healthy, …
-
Recruitment And Restoration Of The Oyster Crassostrea Virginica In Areas With Intense Boating Activity In Mosquito Lagoon, Florida
… months were found to be the optimal time for larval recruitment to increase larval set and survival and to also decrease the effects of sedimentation and water motion. Based on these results, experimental restoration began May 2003 to develop an ecologically and economically feasible …
-
Reproductive ecology of the California sea mussel, Mytilus californianus Conrad
… study deals with the reproductive ecology and larval development of Mytilus californianus. Mytilus californianus is the common mussel found along the more exposed west coast of North America from the Aleutian Islands south Isla Socorro, Mexico (Soot-Ryen, 1955) and was chosen because it is an …
-
Investigating the ecological role of sound on coral reefs
… for their ecological relevance to marine life. Larval stages of many species use acoustic cues to optimize their choice of settlement habitat. Coral reefs feature particularly complex natural soundscapes, yet little is known about the potential effects of these sounds on coral larvae. Reef …
-
Temporal variability and vertical structure in larval abundance : the potential roles of biological and physical processes
… results from variability in planktonic larval supply and from processes occurring during and after larval settlement onto the seafloor. The focus of this thesis is on the temporal and spatial variability in larval supply, the extent to which planktonic larval distributions are determined …
-
Identifying inundation-driven effects among intertidal Crassostrea virginica in a commercially important Gulf of Mexico estuary
… virginica to sea level rise, and the response of larval settlement to sedimentation which is likely to increase with higher water levels and storm frequency. Inundation was used as a proxy for sea level rise. We hypothesized four possible outcomes for intertidal oyster reefs as a result of changes …
-
The importance of fine-scale flow processes and food availability in the maintenance of soft-sediment communities
… microbial content, stability, food supply, and larval supply. One hypothesis for animal-sediment associations is that settling larvae are transported as passive particles and are sorted into different sedimentary habitats much like sediment grains. To test the hypothesis that near-bed …
-
Avaliação da atividade dos organismos marinhos perfurantes de madeira (Teredinidae - Mollusca; Limnoriidae - Crustacea), ao longo do Canal de Itajuru, Cabo Frio, Estado do Rio de Janeiro, Brasil
… in the middle station could have disturbed the larval settlement and consequently, the number of individuals per panel in this station would be smaller than the observed in the more interna! one. Hish salinity variations in this inner station could also have eliminated the more senditive species …
-
Effects of Biofilm Age and Composition on Oyster Larval Setting
… failed. A number of studies have focused on the larval stage of oysters and considered the variables that impact oyster setting behavior in an effort to understand why oyster populations have not recovered. Studies that have examined setting surfaces suggest that biofilms promote oyster larval …
-
Observations of a particle capture on a cylindrical collector : implications for particle accumulation and removal in aquatic systems
… mechanism in many aquatic processes, such as larval settlement, suspension feeding, and vegetative filtration. The collector Reynolds number (Rec), based on the collector diameter, typically ranges from 1-1000 in aquatic environments. No analytical solutions exist to describe capture …
-
Life history traits and population processes in marine bivalve molluscs
… strategy is the possibility of high variation in larval settlement from year to year. I evaluated the role that this variability plays using a stochastic matrix model, and showed that it tends to increase population growth because of the larger size of rarer, successful recruitment events. With an …
-
Pelagic dispersal and population connectivity of the green-lipped mussel (Perna canaliculus) in the Bay of Plenty
… industry. However, due to the complexity of the larval dispersal process, most studies have been unable to determine their detailed dispersal pathways; rather only their coarse directions of travel have been estimated. Microchemical methods can leverage the variation in deposition of trace metals …
-
Environmental influences on banana shrimps of the Sofala Bank, Mozambique Channel
… onshore transport of larvae, promoting coastal settlement, compared with periods without eddies. Locations for simulated larval coastal settlement are identified: northern, central and southern. The roles of tides and larval diel vertical migration in influencing simulated larval settlement …
-
Hydrodynamic mechanisms of larval transport and settlement in oscillatory boundary layer flows
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-03-28 without embargo terms
-
Initial settlement of marine invertebrate larvae : the role of passive sinking in a near-bottom turbulent flow environment
… intervals than during others, the rank order of larval collections within each group of trap designs tested nearly always corresponded precisely to the rank order of passive particle collections by the traps in the flume experiments. Thus, the hypothesis that larvae sinking toward the seabed in …
-
Native And Invasive Competitors Of The Eastern Oyster Crassostrea Virginica In Mosquito Lagoon, Florida
… oysters and the competitors that may affect the settlement, growth, and survival of Crassostrea virginica. The four objectives of my thesis research were to: 1) identify potential oyster competitors in Mosquito Lagoon, 2) determine if the sessile species recruiting to oyster shells have changed …
Page 1 of 2