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Articles 361 - 390 of 1123
Full-Text Articles in Ecology and Evolutionary Biology
Investigating Diel Periodicity In Export Flux In The Gulf Of Mexico Using A Particulate Imaging System, Justin Edward Blancher
Investigating Diel Periodicity In Export Flux In The Gulf Of Mexico Using A Particulate Imaging System, Justin Edward Blancher
Master's Theses
To estimate the diurnal periodicity in the biological pump, a floating array with a marine snow camera system at 150 m depth was used, and particles were imaged at a 40 second interval for a 24 to 30 hour period at five sites in the Gulf of Mexico in June 2017. Each image was processed to identify and size all the particles within the frame, which was then processed to determine diameter, an estimated volume, and settling speed for each particle. Using these parameters, particle mass was estimated using algebraically rearranged calculations for settling speed. Each hour during the deployment …
Bottlenose Dolphin (Tursiops Truncatus) Vocal Responses To Sonar And Spectrally Pink Background Noise, Maria Zapetis
Bottlenose Dolphin (Tursiops Truncatus) Vocal Responses To Sonar And Spectrally Pink Background Noise, Maria Zapetis
Dissertations
As human populations rise, the level of man-made noise increases globally. Naval sonar and boat traffic are underwater sound sources of particular concern to marine mammal welfare. To better understand the impact of these noise increases on cetaceans, studies can explore animals’ behavioral changes in response to noise. Studies have investigated the ‘dose-response’ relationship between the received sound pressure level of sonar signals and the behavior of cetaceans in the wild, but exposure studies in controlled environments are limited. The studies in this dissertation examined bottlenose dolphin vocal modifications during various experimental noise treatments. Acoustic recordings previously obtained for bottlenose …
Comparing Feeding Accuracy Between High And Low Predation Trinidad Guppies, Lydia J. Bonnell
Comparing Feeding Accuracy Between High And Low Predation Trinidad Guppies, Lydia J. Bonnell
Honors College Theses
Efficient feeding accuracy could increase an organism’s survival. Although local adaptation in Trinidad guppies is common, the effects on accuracy are unknown. Guppies were wild caught in 2015 and 2017, filmed while capturing prey. Accuracy wasn’t different within samples but differed across samples, possibly due to the prey types used.
Quantifying Atlantic Sea Scallop (Placopecten Magellanicus) Larval Abundance Throughout Cape Elizabeth, Maine, Hannah Haskell, Britney Evangelista, Alex Loftis
Quantifying Atlantic Sea Scallop (Placopecten Magellanicus) Larval Abundance Throughout Cape Elizabeth, Maine, Hannah Haskell, Britney Evangelista, Alex Loftis
Thinking Matters Symposium Archive
As markets for the Atlantic Sea scallop are growing, the need for sustainable and reliable harvesting methods such as aquaculture is more imperative than ever. Due to the difficulty of maintaining sea scallop hatcheries, scallop farmers typically collect larvae from the ocean and raise them until a marketable size on lease sites. In order to efficiently collect scallop larvae, being able to predict when the larvae are most abundant in the water column is crucial. The goal of our research was to learn when scallop larvae are most abundant in the water column and to determine if there is a …
Sponge Community Biocomplexity, Competition, And Functional Significance In Hard-Bottom Habitats Of The Florida Keys, Fl (Usa), Marla Maxine Valentine
Sponge Community Biocomplexity, Competition, And Functional Significance In Hard-Bottom Habitats Of The Florida Keys, Fl (Usa), Marla Maxine Valentine
Biological Sciences Theses & Dissertations
Sponges can have powerful effects on ecosystem processes in shallow, tropical marine ecosystems and are an integral component of the bentho-pelagic cycle of nutrients, via filtering of dissolved and particulate organic matter from the water column. The diversity of marine communities is thought to play a determining role in intensity of ecosystem processes; thus the loss of taxa alters community function and by extension ecosystem processes. Coastal sponge populations worldwide are increasingly exposed to declining water quality that in several regions has resulted in mass sponge mortalities and reduced sponge diversity. In the Florida Keys (Florida, USA), for example, frequent …
Macroalgal Monitoring In The Great Bay Estuary: 2018 Annual Report, David M. Burdick, Gregg E. Moore, Arthur C. Mathieson, Andrew Payne, Chris Peter
Macroalgal Monitoring In The Great Bay Estuary: 2018 Annual Report, David M. Burdick, Gregg E. Moore, Arthur C. Mathieson, Andrew Payne, Chris Peter
PREP Reports & Publications
Since 2013, the abundance and taxa of intertidal macroalgae have been assessed at fixed locations throughout the Great Bay Estuary in New Hampshire. Algal abundance may be influenced by environmental conditions such as nutrient levels, water temperature, light and invasive species. Therefore, abundance of different algal groups can provide insights into the overall health of the estuary and signal ecological change. In 2018, intertidal abundance data for percentage cover and biomass were collected, as planned, from five of the eight sites. For the first time, subtidal sampling arrays were also incorporated at all four sites in Great Bay proper to …
Population Dynamics And Demographics Of Spotted Seatrout, Cynoscion Nebulosus, Through Spatial Analysis: Towards An Integrative Management Approach, Ashley Melancon Baer
Population Dynamics And Demographics Of Spotted Seatrout, Cynoscion Nebulosus, Through Spatial Analysis: Towards An Integrative Management Approach, Ashley Melancon Baer
LSU Doctoral Dissertations
Spotted seatrout (Cynoscion nebulosus) is one of the most highly prized sportfish along the Gulf of Mexico coast, particularly in Louisiana. Although spotted seatrout are considered to be well managed and sustainably fished according to the state’s most recent stock assessment, the spatial ecology of this species is largely understudied in Louisiana waters. Acoustic telemetry is an innovative technology that is commonly used to assess the movements and behavior of aquatic species, and can be used as a tool to address the paucity of information on the spatial dynamics of spotted seatrout. The focus of this study was …
An Interactive Application For Tracking The Movement Of The Limulus Polyphemus Throughout Long Island Sound (Lis), Ismael Youssef, Samah Senbel, Jennifer Mattei
An Interactive Application For Tracking The Movement Of The Limulus Polyphemus Throughout Long Island Sound (Lis), Ismael Youssef, Samah Senbel, Jennifer Mattei
Biology Faculty Publications
Poster presented at the Long Island Sound Research Conference held March 15, 2019 in Port Jefferson, New York.
Habitat Usage Patterns Of Bottlenose Dolphins (Tursiops Truncatus) In Terrebonne And Timbalier Bays, Louisiana, Mary Allison Manning
Habitat Usage Patterns Of Bottlenose Dolphins (Tursiops Truncatus) In Terrebonne And Timbalier Bays, Louisiana, Mary Allison Manning
LSU Master's Theses
I coupled fine-scale environmental data with observed behavior and group composition data to examine overall distribution within the bay system and to characterize the habitat associated with foraging and the presence of calves. Semi-isolated populations of bottlenose dolphins (Tursiops truncatus) along Louisiana’s coast are undergoing increased risks from boat traffic, oil spills, land subsidence, and planned water diversions (CPRA 2017). Characterizing the habitat use of bottlenose dolphins in Terrebonne and Timbalier bays, Louisiana, is important given the likely high site fidelity, small home ranges, and low exchange of individuals with nearby coastal populations (Lane et al. 2015, McDonald …
Predator Water Balance Alters Intraguild Predation In A Streamsidefood Web, Israel L. Leinbach, Kevin E. Mccluney, John L. Sabo
Predator Water Balance Alters Intraguild Predation In A Streamsidefood Web, Israel L. Leinbach, Kevin E. Mccluney, John L. Sabo
Biological Sciences Faculty Publications
Previous work suggests that animal water balance can influence trophic interactions, with predators increasing their consumption of water-laden prey to meet water demands.But it is unclear how the need for water interacts with the need for energy to drive trophic interactions under shifting conditions. Using manipulative field experiments, we show that water balance influences the effects of top predators on prey with contrasting ratios of water and energy, altering the frequency of intraguild predation. Water-stressed top predators (large spiders) negatively affect water-laden basal prey (crickets), especially male prey with higher water content, whereas alleviation of water limitation causes top predators …
Comparing Orientation Behavior And Prey Preference Of Leptasterias Spp. Between Microhabitats, Jenna C. Sanders, Margaret W. Johnson, C Sarah Cohen
Comparing Orientation Behavior And Prey Preference Of Leptasterias Spp. Between Microhabitats, Jenna C. Sanders, Margaret W. Johnson, C Sarah Cohen
STAR Program Research Presentations
Leptasterias spp. is a species complex of small, six rayed, predatory sea stars that inhabit rocky intertidal communities along the Pacific coast of North America. A developmental mode of brooding their young, rather than broadcasting for planktonic development, limits dispersal away from the natal area, and may also result in fine scale local adaptation of populations. Local adaptation may lead to morphological and behavioral differences among populations, specifically towards the most available prey. Within the rocky intertidalthere are zones of high and low wave impact which create microhabitats with their own selective forces. In areas of high wave impact, stars …
Piscataqua Region Estuaries Partnership 2018 Annual Report, Piscataqua Region Estuaries Partnership
Piscataqua Region Estuaries Partnership 2018 Annual Report, Piscataqua Region Estuaries Partnership
PREP Reports & Publications
No abstract provided.
Variability In Microphytobenthos Biomass And Carbon Isotopic Values In Shallow Coastal Waters Of The Northern Gulf Of Mexico, Sharil N. Deleon, Jeffrey W. Krause, Ronald Baker
Variability In Microphytobenthos Biomass And Carbon Isotopic Values In Shallow Coastal Waters Of The Northern Gulf Of Mexico, Sharil N. Deleon, Jeffrey W. Krause, Ronald Baker
Gulf and Caribbean Research
No abstract provided.
Role Of Managed Marine Areas On The Diversity And Individual Responses Of Rocky Intertidal Shore Grazers In Central Chile, Kathy Liu
Scripps Senior Theses
Many different types of marine benthic herbivores or “grazers” inhabit coastal intertidal zones and play a crucial role in inter- and shallow subtidal ecosystems. Chile has one of the most diverse intertidal zones, but many intertidal grazers are exploited for human consumption. Marine protected areas (MPAs) and marine management and exploitation areas (MEAs) are promising tools for Chile to combat over exploitation of these grazer and other marine resources. This study surveyed the impact of sites with contrasting management on the diversity and abundance of all intertidal grazers and their impact on the size frequency and shell length-body weight allometry …
Larsonia Pterophylla (Cnidaria, Pandeidae) Parasitic On Two Leptocephali: Paraconger Sp. (Congridae) And Callechelyini Gen. Sp. (Ophichthidae) In The Gulf Of Mexico, Matthew S. Woodstock, Charles Golightly, Danté Fenolio, Jon A. Moore
Larsonia Pterophylla (Cnidaria, Pandeidae) Parasitic On Two Leptocephali: Paraconger Sp. (Congridae) And Callechelyini Gen. Sp. (Ophichthidae) In The Gulf Of Mexico, Matthew S. Woodstock, Charles Golightly, Danté Fenolio, Jon A. Moore
Gulf and Caribbean Research
No abstract provided.
Rapid Assessment Of Post-Hurricane Michael Impacts On A Population Of The Sea Urchin Lytechinus Variegatus In Seagrass Beds Of Eagle Harbor, Port Saint Joseph Bay, Florida, Roberta Challener, James B. Mcclintock, Raymond Czaja Jr., Christopher Pomory
Rapid Assessment Of Post-Hurricane Michael Impacts On A Population Of The Sea Urchin Lytechinus Variegatus In Seagrass Beds Of Eagle Harbor, Port Saint Joseph Bay, Florida, Roberta Challener, James B. Mcclintock, Raymond Czaja Jr., Christopher Pomory
Gulf and Caribbean Research
No abstract provided.
Island Invasion: The Silent Crisis In Hawaii, Sophia Janssen
Island Invasion: The Silent Crisis In Hawaii, Sophia Janssen
Pomona Senior Theses
Keeping out invasive species may, upon first review, seem like a trivial environmental cry from ecologists and deep environmentalists; a belated wish to return to an undeveloped world where nature was pristine. However invasive species create problems that impact all of us and can have far more severe consequences than changing a stunning landscape. These problems are heightened in islands like Hawaii, where the fragile ecosystems have developed over centuries of evolution and adaptation. The introduction of a disease-carrying mosquito can put the people of Hawaii at risk to many vector-born illnesses and create an epidemic, taking human life. The …
Editorial: Advances In The Biology And Conservation Of Marine Turtles, Sara M. Maxwell, Annette C. Broderick, Peter H. Dutton, Sabrina Fossette-Halot, Mariana M.P.B. Fuentes, Richard D. Reina
Editorial: Advances In The Biology And Conservation Of Marine Turtles, Sara M. Maxwell, Annette C. Broderick, Peter H. Dutton, Sabrina Fossette-Halot, Mariana M.P.B. Fuentes, Richard D. Reina
Biological Sciences Faculty Publications
(First Paragraph) Marine turtles have been the subject of research over many decades, inspired by their unique life history and necessitated by their declining populations from a suite of human impacts including direct harvest, bycatch in marine fisheries, pollution, and climate change. Despite this, much about marine turtle biology has remained a mystery (Godley et al., 2008; Rees et al., 2016; Wildermann et al., 2018), but the rate of scientific discovery is increasing rapidly. As research techniques and conservation practices expand, the marine turtle research community has kept abreast of these developments and their application to marine turtles. In this …
The Purr Of The Lionfish: Sound And Behavioral Context Of Wild Lionfish In The Greater Caribbean, Michelle T. Schärer-Umpierre, Carlos Zayas, Richard S. Appeldoorn, Evan Tuohy, Jack C. Olson, Jessica A. Keller, Alejandro Acosta
The Purr Of The Lionfish: Sound And Behavioral Context Of Wild Lionfish In The Greater Caribbean, Michelle T. Schärer-Umpierre, Carlos Zayas, Richard S. Appeldoorn, Evan Tuohy, Jack C. Olson, Jessica A. Keller, Alejandro Acosta
Gulf and Caribbean Research
Passive acoustic technology has become a useful and cost-effective method to collect data with very high temporal resolution that can be used to detect the presence, distribution, and remotely monitor soniferous marine biodiversity. In order to maximize the potential of bioacoustic and soundscape research in the oceans, understanding the association between the different realms of sound sources, species-specific calls and behavioral context of sound production are fundamental. A previously unknown vocalization was associated with a behavioral display of lionfish (Pterois spp.) by recordings with synchronous audio and video at deep coral reefs in both Puerto Rico and the Florida …
Seal And Polar Bear Behavioral Response To An Icebreaker Vessel In Northwest Greenland, Kate Lomac-Macnair, José Pedro Andrade, Eduardo Esteves
Seal And Polar Bear Behavioral Response To An Icebreaker Vessel In Northwest Greenland, Kate Lomac-Macnair, José Pedro Andrade, Eduardo Esteves
Human–Wildlife Interactions
Icebreaker vessels are important scientific tools, enabling access and research within the polar regions of the world, including the High Arctic. These vessels have the potential to overlap with marine mammal habitats in infrequently studied areas. Marine mammal behavioral responses to icebreaker vessel presence and distance at which responses occur are not well documented or understood. During the Petermann 2015 Expedition on the icebreaker Oden, seal and polar bear (Ursus maritimus) data were collected in Petermann Fjord (Northwest Greenland), the adjacent Nares Strait region, and transit to and from Thule, Greenland over 31 days (July 30 to …
Ecological Consequences Of Sea Star Wasting Disease: Non-Consumptive Effects And Trait-Mediated Indirect Interactions From Pisaster Ochraceus, Timothy Ian Mcclure
Ecological Consequences Of Sea Star Wasting Disease: Non-Consumptive Effects And Trait-Mediated Indirect Interactions From Pisaster Ochraceus, Timothy Ian Mcclure
Cal Poly Humboldt theses and projects
Consumptive effects (CEs) of predators are an important factor in structuring biological communities, but further work is needed to understand how the interaction between spatial and temporal differences in predator density affects non-consumptive effects (NCEs) on prey. NCEs can cause indirect effects on food resources, known as trait-mediated indirect interactions (TMIIs), and thus can also affect community structure. However, few studies have considered the relationships between spatial and temporal predator density variation and the strength of NCEs and TMIIs in the natural environment. The ochre star Pisaster ochraceus is common predator of the herbivorous black turban snail Tegula funebralis, imposing …
Adult Atlantic Sturgeon Population Dynamics In The York River, Virginia, Jason E. Kahn
Adult Atlantic Sturgeon Population Dynamics In The York River, Virginia, Jason E. Kahn
Graduate Theses, Dissertations, and Problem Reports (ETD)
Sturgeon first appear in the fossil record in the Triassic Period just over 200 million years ago and are among the most primitive of the bony fishes. Despite their large size and historic presence along the East Coast, Atlantic sturgeon were not targeted for their meat and caviar as a commercial fishery until 1880. By 1905 they had declined to less than one percent of their pre-fishing abundance but the fishery continued. Prior to 1980, there had been very little research on Atlantic sturgeon, primarily limited to documenting landing location and poundage, maximum longevity, or weight of eggs per fish. …
Tiger Sharks Eat Songbirds: Scavenging A Windfall Of Nutrients From The Sky, J. Marcus Drymon, K. Feldheim, A. M.V. Fournier, E. A. Seubert, A. E. Jefferson, A. M. Kroetz, Sean P. Powers
Tiger Sharks Eat Songbirds: Scavenging A Windfall Of Nutrients From The Sky, J. Marcus Drymon, K. Feldheim, A. M.V. Fournier, E. A. Seubert, A. E. Jefferson, A. M. Kroetz, Sean P. Powers
University Faculty and Staff Publications
No abstract provided.
Distribution Of Sea Star Wasting Disease Symptoms In Pisaster Ochraceus In The Rocky Intertidal Zone, Jana N. Litt
Distribution Of Sea Star Wasting Disease Symptoms In Pisaster Ochraceus In The Rocky Intertidal Zone, Jana N. Litt
Cal Poly Humboldt theses and projects
Beginning in 2013, many species of sea stars (phylum Echinodermata) along the Pacific coast experienced severe mortality due to sea star wasting disease (SSWD). The ochre sea star, Pisaster ochraceus, experienced one of the highest mortality rates during this outbreak. To test the hypothesis that the intertidal distribution of ochre sea stars influences the incidence and progression of SSWD symptoms, I documented the occurrence of symptoms and survivorship in adult and juvenile stars in the upper and lower portions of the mid-intertidal zone. I also chronicled the progression of SSWD symptoms among individually tagged adult stars to assess changes in …
Spatial Structuring And Life History Connectivity Of Antarctic Silverfish Along The Southern Continental Shelf Of The Weddell Sea, Jilda Alicia Caccavo, Julian R. Ashford, Svenja Ryan, Chiara Papetti, Michael Schröder, Lorenzo Zane
Spatial Structuring And Life History Connectivity Of Antarctic Silverfish Along The Southern Continental Shelf Of The Weddell Sea, Jilda Alicia Caccavo, Julian R. Ashford, Svenja Ryan, Chiara Papetti, Michael Schröder, Lorenzo Zane
OES Faculty Publications
A multi-disciplinary approach was employed to examine a physical-biological population hypothesis for a critical forage species, the Antarctic silverfish Pleuragramma antarctica. Caccavo et al. (2018; Sci Rep 8:17856) had shown strong gene flow along the westward Antarctic Slope Current, in addition to spatially recurring length modes that provided evidence for episodic connectivity. In this paper, otolith nucleus chemistry from a subset of fish collected in the southern Weddell Sea as part of a hydrographic survey of the Filchner Trough system was used to test between connectivity scenarios. Nucleus chemistry, which reflects environmental exposure during early life, showed significant …
Tiger Sharks Eat Songbirds: Reply, J. Marcus Drymon, K. Feldheim, A. M.V. Fournier, A. E. Jefferson, A. M. Kroetz, Sean P. Powers, E. A. Seubert
Tiger Sharks Eat Songbirds: Reply, J. Marcus Drymon, K. Feldheim, A. M.V. Fournier, A. E. Jefferson, A. M. Kroetz, Sean P. Powers, E. A. Seubert
University Faculty and Staff Publications
In response to our recent paper (Drymon et al. 2019), Yosef (2019) questions the mechanism proposed to explain interactions between tiger sharks (Galeocerdo cuvier) and migratory songbirds, while offering an alternative mechanism based on a single observation. We appreciate the comments from Yosef and the opportunity to respond.
Sponges Structure Water-Column Characteristics In Shallow Tropical Coastal Ecosystems, Marla M. Valentine, Mark J. Butler Iv
Sponges Structure Water-Column Characteristics In Shallow Tropical Coastal Ecosystems, Marla M. Valentine, Mark J. Butler Iv
Biological Sciences Faculty Publications
Sponges can have powerful effects on ecosystem processes in shallow tropical marine ecosystems. They drive benthic-pelagic coupling by filtering dissolved and particulate organic matter from the water column, alter water chemistry in association with their symbiotic microorganisms, and increase habitat structural complexity. Anthropogenic degradation of coastal waters is widespread and can reduce the density and diversity of foundation species such as sponges, potentially diminishing their contributions to ecosystem processes. We used a novel mesocosm design that minimized artifacts associated with traditional single-species and closed-system filtration experiments to examine the effects of water turnover and sponge biomass on water-column properties. Using …
Patterns Of Diatom Diversity Correlate With Dissolved Trace Metal Concentrations And Longitudinal Position In The Notheast Pacific Coastal Offshore Transition Zone, P. Dreux Chappell, E. Virginia Armbrust, Katherine A. Barbeau, Randelle M. Bundy, Jagruti Vedamati, Bethany D. Jenkins
Patterns Of Diatom Diversity Correlate With Dissolved Trace Metal Concentrations And Longitudinal Position In The Notheast Pacific Coastal Offshore Transition Zone, P. Dreux Chappell, E. Virginia Armbrust, Katherine A. Barbeau, Randelle M. Bundy, Jagruti Vedamati, Bethany D. Jenkins
OES Faculty Publications
Diatoms are important primary producers in the northeast Pacific Ocean, with their productivity closely linked to pulses of trace elements in the western high nitrate, low chlorophyll (HNLC) region of the oceanographic time series transect 'Line P.' Recently, the coastal-HNLC transition zone of the Line P transect was identified as a hotspot of phytoplankton productivity, potentially controlled by a combination of trace element and macronutrient concentrations. Here we describe diatom community composition in the eastern Line P transect, including the coastal- HNLC transition zone, with a method using high-throughput sequencing of diatom 18S gene amplicons. We identified significant correlations between …
The ‘Thing’ From This World, Sergio M. Pellis
The ‘Thing’ From This World, Sergio M. Pellis
Animal Sentience
Science progresses by making contrasts, and the living world is a gold mine of contrasts. Often disciplines become victims by focusing on too narrow a slice of that diversity, leading to a myopic view of how nature works. The relationships between the brain and behavior have been intensively studied in vertebrates, especially mammals, and we have become complacent in our assumptions about how behavior is constructed. As the target article by Mather (2019) shows, the relationship between the brain and behavior in octopuses forces us to reevaluate some of those assumptions.
Living Shoreline Stabilization To Increase Resiliency At De Soto National Memorial, Linda Walters, Melinda Donnelly, Christian Pilato, Suzanne Connor
Living Shoreline Stabilization To Increase Resiliency At De Soto National Memorial, Linda Walters, Melinda Donnelly, Christian Pilato, Suzanne Connor
CEELAB Research Data
De Soto National Memorial (Bradenton, FL) is an important location where both Native Americans and De Soto's army of soldiers once lived. We have been working closely with the National Park Service and the University of Central Florida to understand how to best stabilize this shoreline using living shoreline techniques combined with long-term natural recruitment. Stabilizing De Soto's shoreline is essential to decrease erosion and shoreline loss to protect the Park's cultural and natural resources, especially the numerous historically significant shell middens. Through pre-restoration monitoring, we determined that high-energy boat wakes were limiting natural mangrove recruitment. Lack of retention of …