Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Community (2)
- Anoxia (1)
- Canal (1)
- Chesapeake bay (1)
- Coupled models (1)
-
- Eutrophication (1)
- Fish larvae (1)
- Fish population (1)
- Habitat (1)
- Hypoxia (1)
- Individual-based model (1)
- LIDAR (1)
- Landscape analysis (1)
- Life history (1)
- Matrix projection model (1)
- Nutrients (1)
- Patch analyst (1)
- Patuxent river (1)
- Red snapper (1)
- Restoration (1)
- Shape metrics (1)
- Simulation (1)
- Tidal marsh elevation (1)
- Trawling (1)
Articles 1 - 4 of 4
Full-Text Articles in Physical Sciences and Mathematics
The Effects Of Trawling And Habitat Use On Red Snapper And The Associated Community, Robert Joseph David Wells
The Effects Of Trawling And Habitat Use On Red Snapper And The Associated Community, Robert Joseph David Wells
LSU Doctoral Dissertations
The primary impediment to the recovery of Gulf of Mexico (GOM) red snapper is believed to be high levels of bycatch of age 0 and age 1 individuals in shrimp trawls. Thus, conservation of GOM red snapper involves evaluating both habitat-specific function and effects of shrimp trawls on red snapper and the associated benthic ecosystem. The two goals of this study were to evaluate the effects commercial shrimp trawls have on juvenile red snapper life history parameters, on associated fish and invertebrate communities and their habitat, and to identify essential fish habitat (EFH) for red snapper by applying all four …
Predicting Water Quality Effects On Bay Anchovy (Anchoa Mitchilli) Growth And Production In Chesapeake Bay: Linking Water Quality And Individual-Based Fish Models, Aaron Thomas Adamack
Predicting Water Quality Effects On Bay Anchovy (Anchoa Mitchilli) Growth And Production In Chesapeake Bay: Linking Water Quality And Individual-Based Fish Models, Aaron Thomas Adamack
LSU Doctoral Dissertations
Water quality in the Chesapeake Bay and the Patuxent River has decreased since the 1950s due to an increase in nutrient loadings. Increased nutrient loads have caused an increase in the extent and duration of hypoxic conditions. Restoration via large-scale reductions in nutrient loadings is now underway. How reducing nutrient loadings will affect water quality is well predicted; however the effect on fish is generally unknown as most water quality models do not include trophic levels higher than zooplankton. I combined two water quality models with bay anchovy models (Anchoa mitchilli) to examine the effects of changes in nutrient loadings …
A Comparison Of Channel Morphology, Marsh Elevation, And Biological Processes In Natural And Dredged Tidal Salt Marshes In Louisiana, Jennifer S. Spicer
A Comparison Of Channel Morphology, Marsh Elevation, And Biological Processes In Natural And Dredged Tidal Salt Marshes In Louisiana, Jennifer S. Spicer
LSU Doctoral Dissertations
Channel networks in tidal marshes serve as conduits for the exchange of water between the estuary and the marsh surface and form the spatial structure that regulates the flow of organisms, materials, and energy throughout the marsh system. Canal dredging creates channels with distinct linear shapes, and the artificial levee created from the dredged material creates ‘spoil banks’ along either side of the channel edge. Differences in morphology and adjacent marsh surface elevation between natural and dredged channel systems have not been well quantified, but may have important implications for the functioning of tidal channels as habitat for marsh-dependent species. …
A Comparison Of Individual-Based And Matrix Projection Models To Applied To Fish Population And Community Dynamics, Shaye Ellen Sable
A Comparison Of Individual-Based And Matrix Projection Models To Applied To Fish Population And Community Dynamics, Shaye Ellen Sable
LSU Doctoral Dissertations
Matrix projection models and individual-based models (IBM) are commonly used for the analysis and management of fish populations. Matrix models break down the population into age or stage classes, while IBMs track individuals. I perform a series of quantitative comparisons between the predictions of the two modeling approaches using the IBM as the standard of comparison to demonstrate when individual variation, species interactions, and spatial heterogeneity adversely affect matrix model performance. I first evaluate the matrix approach for predicting yellow perch population responses when perch are involved in size-specific predator-prey interactions with walleye. I created density-dependent and stochastic age-structured and …