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Full-Text Articles in Marine Biology
Age, Growth, Mortality, And The Effects Of Trawling On Mortality Of The Longspine Porgy, Stenotomus Caprinus, Cher Marie Newman
Age, Growth, Mortality, And The Effects Of Trawling On Mortality Of The Longspine Porgy, Stenotomus Caprinus, Cher Marie Newman
Master's Theses
Stenotomus caprinus (Longspine Porgy) is one of the most abundant bycatch species caught in trawl fisheries in the northern Gulf of Mexico (GOM). Biological data of length, weight, and abundance have been collected since 1972 on the Southeast Area Monitoring and Assessment Program (SEAMAP) surveys with a variety of GOM species, including Longspine Porgy, using trawl nets during groundfish surveys. In 2010-2011 five Longspine Porgy were obtained from Groundfish and Pelagic surveys at each station for further analysis. Age distribution was determined through von Bertalanffy length and weight-age models. The samples were separated into two regions of the GOM to …
Assessing Respiration Rates And Nutrient Dynamics Of Aritifical Reef Biofilms And Bacterioplankton In The Mississippi Sound, Lynn Elizabeth Wilking
Assessing Respiration Rates And Nutrient Dynamics Of Aritifical Reef Biofilms And Bacterioplankton In The Mississippi Sound, Lynn Elizabeth Wilking
Master's Theses
Artificial reefs are primarily used to provide a suitable habitat for target fish populations, but the structures can also improve water quality and benefit non-target organisms. Laboratory incubation experiments were conducted in the presence of biofilm on rubble and in its absence to examine bacterial growth, community respiration, and nutrient dynamics at four artificial reef habitats in the Mississippi Sound. Biofilm samples were also collected from settlement plates deployed at each site and were analyzed for 813C and 81sN stable isotope content. Respiration rates were always higher in the presence of biofilm but bacterial abundance often declined over time, and …
Development Of A Genetic Monitoring Program For Stock Enhancement Of Mississippi Spotted Seatrout (Cynoscion Nebulosus), Carly Renee Somerset
Development Of A Genetic Monitoring Program For Stock Enhancement Of Mississippi Spotted Seatrout (Cynoscion Nebulosus), Carly Renee Somerset
Master's Theses
The spotted seatrout is a coastal sciaenid fish that is intensively exploited in the northcentral Gulf of Mexico. A stock enhancement research program was initiated in 2004 to develop methods to culture juveniles and release them in natural habitats to increase recruitment in the fishery. The goal of this study was to initiate a genetic monitoring program for stock enhancement activities. Assays for 15 microsatellite loci were optimized. Simulations indicated that this panel of molecular markers was sufficient to identify recaptured hatchery fish with high confidence assuming genetic data on broodfish spawned to produce released fish were available. Stock structure …
Assessing Physiological Thresholds For Eelgrass (Zostera Marina L.) Survival In The Face Of Climate Change, Carolyn Jane Ewers
Assessing Physiological Thresholds For Eelgrass (Zostera Marina L.) Survival In The Face Of Climate Change, Carolyn Jane Ewers
Master's Theses
Seagrasses are well known for the important ecological roles they play in coastal marine waters worldwide. However, the severe rate of decline observed in seagrasses this century is expected to accelerate with climate change. Conservation efforts can be improved by quantifying physiological thresholds of seagrasses and using these estimates in modeling to forecast changes in distribution. This study examines the response of eelgrass (Zostera marina L.) across current temperatures to look for early warning signs of vulnerability and to evaluate the ways we determine critical thresholds for survival. Whole eelgrass ramets, collected from three beds in Morro Bay, California, …