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Full-Text Articles in Life Sciences

Transcriptomic And Epigenetic Responses To Environmental Stress In Marine Bivalves With A Focus On Harmful Algal Blooms, Maria Victoria Suarez Ulloa Jun 2017

Transcriptomic And Epigenetic Responses To Environmental Stress In Marine Bivalves With A Focus On Harmful Algal Blooms, Maria Victoria Suarez Ulloa

FIU Electronic Theses and Dissertations

Global change poses new threats for life in the oceans forcing marine organisms to respond through molecular acclimatory and adaptive strategies. Although bivalve molluscs are particularly tolerant and resilient to environmental stress, they must now face the challenge of more frequent and severe Harmful Algal Blooms (HABs) episodes. These massive outbreaks of microalgae produce toxins that accumulate in the tissues of these filter-feeder organisms, causing changes in their gene expression profiles, which in turn modify their phenotype in order to maintain homeostasis. Such modifications in gene expression are modulated by epigenetic mechanisms elicited by specific environmental stimuli, laying the foundations ...


History Of The Virginia Oyster Fishery, Chesapeake Bay, Usa, David M. Schulte May 2017

History Of The Virginia Oyster Fishery, Chesapeake Bay, Usa, David M. Schulte

VIMS Articles

Oyster populations in Virginia's waters of Chesapeake Bay were lightly exploited until the early 1800s, when industrial fishery vessels first arrived, driven south from New England due to the collapse of northeastern oyster fisheries. Early signs of overexploitation and habitat degradation were evident by the 1850s. The public fishery, where oyster fishers harvest on state-owned bottom, rapidly developed after the Civil War and peaked in the early 1880s. Declines were noted by the late 1880s and eventually prompted the creation of Virginia's shell-planting and oyster-seed (young-of-the-year, YOY) moving repletion program in the 1920s. Despite management and increasing repletion ...


Investigating The Quantity And Types Of Microplastics In The Organic Tissue Of Oysters And Crabs In The Indian River Lagoon, Heidi Waite Jan 2017

Investigating The Quantity And Types Of Microplastics In The Organic Tissue Of Oysters And Crabs In The Indian River Lagoon, Heidi Waite

Honors Undergraduate Theses

Microplastics are widespread and abundant. Few studies have examined the diversity and abundance of microplastics in wild organisms. This study determined the microplastic quantity and types in the organic tissues of the eastern oyster Crassostrea virginica and Atlantic mud crab Panopeus herbstii from the Indian River Lagoon (IRL). This study also investigated whether location affected the microplastic abundance and variety. Organisms were collected from three sites across Mosquito Lagoon in the northern IRL. Oysters were frozen after collection. Crabs were placed in containers for 5 days before freezing. The soft organic tissue was chemically digested using hydrogen peroxide, filtered, and ...


Stakeholders Of The Chesapeake: Curse Of The Eastern Oyster. Subjects: Life Science / Biology, Environmental Science, Marine/Ocean Science Grades: 6-8, Taylor Goelz Jan 2017

Stakeholders Of The Chesapeake: Curse Of The Eastern Oyster. Subjects: Life Science / Biology, Environmental Science, Marine/Ocean Science Grades: 6-8, Taylor Goelz

Reports

How do we decide how to manage oysters and who has a stake in that management decision? Students are placed in the role of a stakeholder group who cares about what happens to the Eastern oyster and asked to rank management priorities from the perspective of their group and others. Through viewing oyster management through a single perspective, students can begin to understand that balancing stakeholder’s views in setting policy and management is challenging.