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Articles 181 - 197 of 197
Full-Text Articles in Marine Biology
Effects Of Closure Of The Mississippi River Gulf Outlet On Saltwater Intrusion And Bottom Water Hypoxia In Lake Pontchartrain, Michael A. Poirrier
Effects Of Closure Of The Mississippi River Gulf Outlet On Saltwater Intrusion And Bottom Water Hypoxia In Lake Pontchartrain, Michael A. Poirrier
Gulf and Caribbean Research
The goal of this study was to determine if Mississippi River Gulf Outlet closure by hurricane flood protection projects stopped saltwater intrusion, salinity stratification, and associated low bottom water dissolved oxygen in Lake Pontchartrain.
First Record Of A Nurse Shark, Ginglymostoma Cirratum, Within The Mississippi Sound, Jill M. Hendon, Eric R. Hoffmayer, William B. Driggers Iii
First Record Of A Nurse Shark, Ginglymostoma Cirratum, Within The Mississippi Sound, Jill M. Hendon, Eric R. Hoffmayer, William B. Driggers Iii
Gulf and Caribbean Research
Of all the coastal shark species in the northern Gulf of Mexico, the nurse shark, Ginglymostoma cirratum, is one of the few species not documented in the Sound. Unlike most coastal sharks, nurse shark distribution is confined to a relatively specific suite of abiotic characteristics. Hannan et al. (2012) demonstrated that the distribution of nurse sharks in the northern GOM is primarily limited to hard bottom habitats with relatively high temperature, salinity, dissolved oxygen, and water clarity. Herein, we provide support for the findings of Hannan et al. (2012) and report the first documented occurrence of a nurse shark …
The Biology And Ecology Of Epinephilidae Speciea And Their Implications To Fisheries Management, Jason R. How
The Biology And Ecology Of Epinephilidae Speciea And Their Implications To Fisheries Management, Jason R. How
Theses: Doctorates and Masters
This thesis examines the biological and ecological aspects of members of the globally exploited Epinephilidae with reference to fisheries management and in particular the use of closures. The leopard coralgrouper Plectropomus leopardus is a common reef fish throughout the Indo-Pacific region and a major target of both commercial and recreational fisheries. There has been limited research on this species in the eastern Indian Ocean, where there are only two populations. An examination of the species found a number of significant biological differences to their eastern Australian con-specifics. Most noticeable was the strong size-related cue over their protogynous sex change. The …
The Spacial And Temporal Community Structure Of Ichthyoplankton In A Northeast Florida Estuary : A Study Of Ingress At A Faunal Boundary, Breanna Korsman
The Spacial And Temporal Community Structure Of Ichthyoplankton In A Northeast Florida Estuary : A Study Of Ingress At A Faunal Boundary, Breanna Korsman
UNF Graduate Theses and Dissertations
Estuaries are widely recognized as important habitats for the early life history stages of commercially and recreationally important marine fish species. In general the estuaries of northeast Florida are understudied, and there is a need to characterize the ichthyoplankton community at this important faunal boundary between temperate and tropical marine zones. To determine community structure and temporal patterns in the distribution and abundance of larval fish ingressing in to the Guana-Tolomato-Matanzas (GTM) estuary through its two inlets (St. Augustine and Matanzas), ichthyoplankton were sampled bi-weekly for one year at both inlets during nighttime spring flood tides beginning in March 2012. …
The Effects Of Thermal Stress And Algal Competition On The Early Life-History Stages Of Porites Astreoides And The Development Of Stress-Detecting Biomarkers For Use In Scleractinan Corals, Kevin C. Olsen
UNF Graduate Theses and Dissertations
Scleractinian coral populations are declining worldwide in response to numerous stressors operating on both global and regional scales. Rising sea surface temperatures associated with global climate change and the increasing frequency of coral-macroalgae competitive interactions are two of the gravest ecological drivers facing coral reef ecosystems. However, little is known about how these stressors interact to impact corals, their health, and potential modes of population recovery. These threats also highlight the need to develop reliable techniques that detect stress in multiple life-history stages of hermatypic corals prior to the degradation of coral reef habitats. To address these concerns we evaluated …
Characterization Of Ichthyoplankton In The Northeastern Gulf Of Mexico From Seamap Plankton Surveys, 1982-1999, Joanne Lyczkowski-Shultz, David S. Hanisko, Kenneth J. Sulak, Malgorzata Konieczna, Pamela J. Bond
Characterization Of Ichthyoplankton In The Northeastern Gulf Of Mexico From Seamap Plankton Surveys, 1982-1999, Joanne Lyczkowski-Shultz, David S. Hanisko, Kenneth J. Sulak, Malgorzata Konieczna, Pamela J. Bond
Gulf and Caribbean Research
Data for 61 selected ichthyoplankton taxa from 1,166 bongo and neuston net samples at 72 stations comprising the USGS Northeastern Gulf of Mexico Ichthyoplankton Synopsis (UNIS) study area were analyzed. These data were taken during annual spring and fall Southeast Area Monitoring and Assessment Program (SEAMAP) Gulfwide plankton surveys over the period 1982-1999. The UNIS study area contributed disproportionately more fish eggs, total larvae and net-caught zooplankton biomass to survey totals than would be expected from the number of samples taken in the study area. This pattern was more evident during spring than fall surveys and is probably related to …
Doc Dynamics In Eddies Of The Sargasso Sea, Eric Matthew Lachenmyer
Doc Dynamics In Eddies Of The Sargasso Sea, Eric Matthew Lachenmyer
Theses and Dissertations
Bacterial productivity and size-fractioned rates of dissolved organic carbon (DOC) excretion from primary and secondary producers were measured in two eddy types, one anti-cyclonic (February 2012) and one cyclonic eddy (July 2012), in the Sargasso Sea. Bacterial productivity (BP) rates in the cyclonic eddy were highest in the center (9.2 mg C m-2d-1) and edge (10.4 mg C m-2d-1) of the eddy compared to the anti-cyclone center (2.2 mg C m-2d-1) and edge (5.1 mg C m-2d-1). Rates of DOC excretion from14C-tracer experiments were not significantly higher than background; lack of accumulation of labeled material indicated very fast uptake of …
Seabed Classification For Trawlability Determined With A Multibeam Echo Sounder On Snakehead Bank In The Gulf Of Alaska, Thomas C. Weber, Chris Rooper, John L. Butler, Darin Jones, Chris Wilson
Seabed Classification For Trawlability Determined With A Multibeam Echo Sounder On Snakehead Bank In The Gulf Of Alaska, Thomas C. Weber, Chris Rooper, John L. Butler, Darin Jones, Chris Wilson
Center for Coastal and Ocean Mapping
—Rockfishes (Sebastes spp.) tend to aggregate near rocky, cobble, or generally rugged areas that are difficult to survey with bottom trawls, and evidence indicates that assemblages of rockfish species may differ between areas accessible to trawling and those areas that are not. Consequently, it is important to determine grounds that are trawlable or untrawlable so that the areas where trawl survey results should be applied are accurately identified. To this end, we used multibeam echosounder data to generate metrics that describe the seafloor: backscatter strength at normal and oblique incidence angles, the variation of the angle-dependent backscatter strength within 10° …
Novel Liquid Chromatography - Fourier Transform Mass Spectrometry (Ms) And Triple Quadrupole Ms Methods For The Determination Of Diarrhetic Shellfish Poisoning (Dsp) Toxins., Bébhine Carey
Theses
Harmful algal blooms (HABs) appear to be on the rise globally, which not only has a negative impact on the shellfish industry but can also cause human and animal intoxications. In order to advance our knowledge of HABs, specific and sensitive analytical methods are required to aid in monitoring shellfish and algal samples for biotoxins, harmful to consumers.
Habitat Availability And Heterogeneity And The Indo-Pacific Warm Pool As Predictors Of Marine Species Richness In The Tropical Indo-Pacific, Jonnell C. Sanciangco, Kent E. Carpenter, Peter J. Etnoyer, Fabio Moretzsohn
Habitat Availability And Heterogeneity And The Indo-Pacific Warm Pool As Predictors Of Marine Species Richness In The Tropical Indo-Pacific, Jonnell C. Sanciangco, Kent E. Carpenter, Peter J. Etnoyer, Fabio Moretzsohn
Biological Sciences Faculty Publications
Range overlap patterns were observed in a dataset of 10,446 expert-derived marine species distribution maps, including 8,295 coastal fishes, 1,212 invertebrates (crustaceans and molluscs), 820 reef-building corals, 50 seagrasses, and 69 mangroves. Distributions of tropical Indo-Pacific shore fishes revealed a concentration of species richness in the northern apex and central region of the Coral Triangle epicenter of marine biodiversity. This pattern was supported by distributions of invertebrates and habitat-forming primary producers. Habitat availability, heterogeneity, and sea surface temperatures were highly correlated with species richness across spatial grains ranging from 23,000 to 5,100,000 km(2) with and without correction for autocorrelation. The …
Genetic Population Structure Of Us Atlantic Coastal Striped Bass (Morone Saxatilis), David T. Gauthier, Corinne A. Audemard, Jeanette E. L. Carlsson, Tanya L. Darden, Michael R. Denson, Kimberly S. Reece, Jens Carlsson
Genetic Population Structure Of Us Atlantic Coastal Striped Bass (Morone Saxatilis), David T. Gauthier, Corinne A. Audemard, Jeanette E. L. Carlsson, Tanya L. Darden, Michael R. Denson, Kimberly S. Reece, Jens Carlsson
Biological Sciences Faculty Publications
Genetic population structure of anadromous striped bass along the US Atlantic coast was analyzed using 14 neutral nuclear DNA microsatellites. Young-of-the-year and adult striped bass (n = 1114) were sampled from Hudson River, Delaware River, Chesapeake Bay, North Carolina, and South Carolina. Analyses indicated clear population structure with significant genetic differentiation between all regions. Global multilocus F-ST was estimated at 0.028 (P < 0.001). Population structure followed an isolation-by-distance model and temporal sampling indicated a stable population structure more than 2 years at all locations. Significant structure was absent within Hudson River, whereas weak but significant genetic differences were observed between northern and southern samples in Chesapeake Bay. The largest and smallest effective striped bass population sizes were found in Chesapeake Bay and South Carolina, respectively. Coalescence analysis indicated that the highest historical gene flow has been between Chesapeake Bay and Hudson River populations, and that exchange has not been unidirectional. Bayesian analysis of contemporary migration indicated that Chesapeake Bay serves as a major source of migrants for Atlantic coastal regions from Albemarle Sound northward. In addition to examining population genetic structure, the data acquired during this project were capable of serving as a baseline for assigning fish with unknown origin to source region.
Horseshoe Crab Eggs: A Rare Resource For Predators In Long Island Sound, Mark Beekey, Jennifer Mattei, Barbara J. Pierce
Horseshoe Crab Eggs: A Rare Resource For Predators In Long Island Sound, Mark Beekey, Jennifer Mattei, Barbara J. Pierce
Biology Faculty Publications
In Delaware Bay, the spawning of several million horseshoe crabs (Limulus polyphemus) coincides with the arrival of migratory shorebirds that feed on their eggs. High horseshoe crab spawning densities and resulting high egg densities drive egg availability and predation rates. At high spawning densities, female horseshoe crabs perturb previously deposited clutches causing eggs to rise to the sediment surface (surface egg densities average 100,000 eggs m− 2). At the surface (0–5 cm), the eggs are quickly depleted by shorebirds and other predators. This interaction between egg density and egg predation has not been explicitly explored on …
Release Of Dissolved Organic Carbon From Seagrass Wrack And Its Implications For Trophic Connectivity, Paul S. Lavery, Kathryn M. Mcmahon, Julia Weyers, Mary C. Boyce, Carolyn Elizabeth Oldham
Release Of Dissolved Organic Carbon From Seagrass Wrack And Its Implications For Trophic Connectivity, Paul S. Lavery, Kathryn M. Mcmahon, Julia Weyers, Mary C. Boyce, Carolyn Elizabeth Oldham
Research outputs 2013
The export of old leaves and stems (wrack) from seagrass meadows provides a mechanism for trophic connectivity among coastal ecosystems. As little of this wrack is consumed by mesograzers, leached dissolved organic carbon (DOC) may determine the importance of wrack as a trophic subsidy. However, few studies have examined the effect of seagrass type or age on the release of DOC or its bioavailability. We examined the amount and composition of DOC released from different wrack: Posidonia sinuosa, Amphibolis antarctica and the alga Laurencia sp. We then examined the effect of age on DOC leaching from P. sinuosa wrack. The …
Meta-Analysis Reveals Complex Marine Biological Responses To The Interactive Effects Of Ocean Acidification And Warming, Ben P. Harvey, Dylan Gwynn-Jones, Philippa J. Moore
Meta-Analysis Reveals Complex Marine Biological Responses To The Interactive Effects Of Ocean Acidification And Warming, Ben P. Harvey, Dylan Gwynn-Jones, Philippa J. Moore
Research outputs 2013
Ocean acidification and warming are considered two of the greatest threats to marine biodiversity, yet the combined effect of these stressors on marine organisms remains largely unclear. Using a meta-analytical approach, we assessed the biological responses of marine organisms to the effects of ocean acidification and warming in isolation and combination. As expected biological responses varied across taxonomic groups, life-history stages, and trophic levels, but importantly, combining stressors generally exhibited a stronger biological (either positive or negative) effect. Using a subset of orthogonal studies, we show that four of five of the biological responses measured (calcification, photosynthesis, reproduction, and survival, …
Variability In The Carbon Storage Of Seagrass Habitats And Its Implications For Global Estimates Of Blue Carbon Ecosystem Service, Paul Lavery, Miguel-Angel Mateo, Oscar Serrano, Mohammad Rozaimi
Variability In The Carbon Storage Of Seagrass Habitats And Its Implications For Global Estimates Of Blue Carbon Ecosystem Service, Paul Lavery, Miguel-Angel Mateo, Oscar Serrano, Mohammad Rozaimi
Research outputs 2013
The recent focus on carbon trading has intensified interest in ‘Blue Carbon’–carbon sequestered by coastal vegetated ecosystems, particularly seagrasses. Most information on seagrass carbon storage is derived from studies of a single species, Posidonia oceanica, from the Mediterranean Sea. We surveyed 17 Australian seagrass habitats to assess the variability in their sedimentary organic carbon (Corg) stocks. The habitats encompassed 10 species, in mono-specific or mixed meadows, depositional to exposed habitats and temperate to tropical habitats. There was an 18-fold difference in the Corg stock (1.09– 20.14 mg Corg cm23 for a temperate Posidonia sinuosa and a temperate, estuarine P. australis …
Sources And Supply Of Kelp Detritus : Quantifying Mechanisms Of Production, Thibaut De Bettignies
Sources And Supply Of Kelp Detritus : Quantifying Mechanisms Of Production, Thibaut De Bettignies
Theses: Doctorates and Masters
In temperate waters, rocky reefs dominated by extremely productive kelp beds export considerable primary production. Despite the extensive body of work on kelp detritus as a trophic subsidy, many questions remain about the production of this detritus. The aim of this thesis was to determine the rate and mechanisms of kelp detritus production, for Ecklonia radiata, the dominant kelp species in temperate Australia. Most of the work was conducted in Marmion Lagoon located 20 km North of Perth, south-western Western Australia, a region strongly influenced by oceanic swell and winter storms. The study comprised of four major components: the impact …
Herbivory By Parma Mccullochi (Pomacentridae) : Its Role As An Ecosystem Engineer In Temperate Algal-Dominated Reefs, Frederico Vitelli
Herbivory By Parma Mccullochi (Pomacentridae) : Its Role As An Ecosystem Engineer In Temperate Algal-Dominated Reefs, Frederico Vitelli
Theses: Doctorates and Masters
Pomacentridae is one of the most representative families of herbivorous fishes inhabiting both tropical and temperate reefs, yet the vast majority of studies examining feeding within this family have been undertaken in tropical rather than temperate regions. Despite the high abundances of the pomacentrid Parma mccullochi in temperate waters of Western Australia, and their likely importance in removing algae from reefs in the region, there is a lack of information on their diet and their impact on the reef algal community. This study aims to determine the role of Parma mccullochi as an ecosystem engineer on temperate algal-dominated reefs in …