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Articles 1 - 12 of 12
Full-Text Articles in Aquaculture and Fisheries
Distribution Of Shell-Boring Polychaetes At Shellfish Aquaculture Sites Along The Northeast Coast Of The Us, Samantha Silverbrand
Distribution Of Shell-Boring Polychaetes At Shellfish Aquaculture Sites Along The Northeast Coast Of The Us, Samantha Silverbrand
Honors College
Coastal shellfish aquaculture has expanded substantially in recent years in Maine and New England as traditional wild fishery stocks have declined. As shellfish aquaculture has expanded, producers have become more concerned about marine worm pests (i.e., polychaetes) that infest cultured bivalves. In particular, worms from the genus Polydora (also known as “polydorids”) burrow into oyster and scallop shells where they feed and deposit mud. Bivalves cover over the muddy burrows creating blisters that can decrease their market value and hinder growth. Farmers and researchers have identified methods to control infestations of P. websteri, one common species of shell-boring worm. However, …
The Sociocultural Significance Of Maine's Oyster Based On Media Coverage Analysis, Syeira Clark
The Sociocultural Significance Of Maine's Oyster Based On Media Coverage Analysis, Syeira Clark
Honors College
Throughout the last decade, the oyster aquaculture industry in Maine has boomed, with 6 million pounds of oysters being harvested in 2021, about the amount that was harvested in 2016 (Cough, 2022). According to the founders of the Maine Oyster Trail, there are over 150 oyster farms currently operating on Maine’s coast, which is about twice as many as there were in 2016 (Maine Sea Grant). With this boom in the industry has come a wave of opportunity, as well as news coverage about the shellfish. This study examines the socio-cultural significance to the state of Maine. While the oyster …
Expression Of The Rag-1 Gene In Larval Yellowtail Kingfish, Gabriella Peluso
Expression Of The Rag-1 Gene In Larval Yellowtail Kingfish, Gabriella Peluso
Honors College
Aquaculture has taken over from capture fisheries as a primary global provider of seafood products. Seriola lalandi, or Yellowtail kingfish, has become a species of interest, as it is a fish notable for its marketability and culinary desirability. With the expansion of aquaculture and the increased amount of high-level operating facilities comes an increased risk of disease outbreaks. There are methods commonly used within these facilities for disease control, including incorporating nutritional feeds into the fishes’ diets, safe husbandry practices, and vaccinations. While these methods can be effective, they have caveats that must be considered. Adequate diets and improved …
Abundance Of Shell-Boring Polychaete Worms And Other Fouling Organisms In Aquacultured Oysters From Maine Used For Reef Restoration In Great Bay, Nh, Haleigh Wright
Honors College
Restoration projects on the oyster reefs in Great Bay, NH have been active since 2009 with the most recent involving the transfer of oysters from Maine oyster farms into the Bay. In an attempt to prevent the transfer of non-native species from oyster farms to the reefs, samples of oysters from each farm were inspected for shell-boring polychaete infestations. Polydora websteri, a common shell-boring species worldwide, was in high abundance in reference samples from oyster farms in Great Bay and in samples from the restoration grounds, themselves. A second shell-boring species, provisionally identified as P. onagawaensis, is present on oyster …
Overwinter Survival Rate Of Moose (Alces Alces) Calves In Relation To Habitat Composition, Bridget Re
Overwinter Survival Rate Of Moose (Alces Alces) Calves In Relation To Habitat Composition, Bridget Re
Honors College
Naturally occurring resource scarcity and limited foraging in winter habitats of northern New England moose (Alces alces) calves result in an energetic strain—particularly for individuals experiencing winter tick (Dermacentor albipictus) parasitism. Recent collaborative studies conducted between Maine’s Department of Inland Fisheries and Wildlife (MIFW) and the University of New Hampshire have attributed the decline of winter survival in moose (Alces alces) calves to be closely linked to winter tick (Dermacentor albipictus) parasitism (Jones et al 2018, Ellingwood et al. 2018, Healy et al. 2018, Pekins 2018). In addition to winter tick abundance …
Landscape Factors Affecting Foraging Flight Altitudes Of Great Blue Heron In Maine; Relevance To Wind Energy Development, Lauren Dolinski
Landscape Factors Affecting Foraging Flight Altitudes Of Great Blue Heron In Maine; Relevance To Wind Energy Development, Lauren Dolinski
Honors College
In an attempt to increase alternative energy sources, there has been greater development of wind farms across the United States. This expanded development may pose a potential threat to birds that are flying overhead (EIA 2017, Leung and Yang 2011). More information is needed on the factors that affect a bird’s behavior while flying and if the current policies and dimensions of wind turbines interfere with flight altitudes. We used data from GPS-marked great blue herons (Ardea herodias) in Maine to classify their flight altitudes relative to wind turbine height and assess different landscape factors that affect flight …
Twenty-Five Years Of Change In Spruce Grouse Occupancy At Their Southern Range Margin In Maine, Usa, Christopher J. Gilbert
Twenty-Five Years Of Change In Spruce Grouse Occupancy At Their Southern Range Margin In Maine, Usa, Christopher J. Gilbert
Honors College
Species at their southern range margin are often dispersed throughout fragmented populations where they experience less optimum conditions compared to their central range. Spruce Grouse (Falcipennis canadensis) are boreal forest obligates distributed throughout the Northern United States and Canada and reach their southeastern range extent in Maine. I resurveyed 18 Black Spruce (Picea mariana) – Tamarack (Larix laricina) stands on Mount Desert Island, Maine, to observe changes in Spruce Grouse occupancy and abundance between the early 1990s (Whitcomb et al. 1996) and present day. I conducted two rounds of call back surveys within each …
Ecosystem Metabolism Modeling Of Estuaries In Maine: Using Dissolved Oxygen As A Tool For Aquaculture Site Assessment, Katherine Miller
Ecosystem Metabolism Modeling Of Estuaries In Maine: Using Dissolved Oxygen As A Tool For Aquaculture Site Assessment, Katherine Miller
Honors College
The net primary productivity (NPP), also known as the net ecosystem metabolism, of an estuary is a value indicative of the growth and activity of an estuary’s primary producers, relative to the metabolic activity of its consumers. When NPP is high, estuaries exhibit autotrophic conditions that have the capacity to support fruitful bivalve aquaculture. For oyster farmers, the ability to monitor an estuary’s NPP would allow them to predict and prepare for seasonal changes to oyster growth that result from changes to their phytoplankton food source and access to dissolved oxygen (DO). Not only would this aid farmers on site …
Assessment Of Sea Lice Infestations On Wild Fishes Of Cobscook Bay, Alexander Jensen
Assessment Of Sea Lice Infestations On Wild Fishes Of Cobscook Bay, Alexander Jensen
Honors College
Sea lice are ectoparasitic copepods on fishes and can negatively impact aquaculture operations. Little work on sea lice, specifically Lepeophtheirus salmonis and Caligus elongatus, has occurred in the northwest Atlantic. This project characterized sea lice infestations on wild fishes in Cobscook Bay during 2012. Trawling, seine netting, and fyke netting occurred from March to November. Netting sites were selected to sample the bay’s three regions: Outer, Central, and Inner Bay. Visual examinations of fish were used to identify wild hosts and characterize sea lice life stage abundances, attachment locations, and infection prevalence and intensity. DNA sequencing was used to …
Investigation Of Early Development And Importance Of Sediment Choice In The Hatchery Production Of Razor Clams, Ensis Directus, Molly P. Flanagan
Investigation Of Early Development And Importance Of Sediment Choice In The Hatchery Production Of Razor Clams, Ensis Directus, Molly P. Flanagan
Honors College
Ensis directus, commonly known as the razor clam, is a bivalve species that lives in temperate sub-polar regions of the Atlantic Ocean. It is an infaunal species found in shallow, subtidal, sedimentary habitats. A recent increase in the market value for razor clams has resulted in heightened interest in the culture of this species. The experimental hatchery at the University of Maine’s Darling Marine Center began work in 2012 to develop improved hatchery and grow-out techniques for this species. For my thesis, razor clam embryos from both spontaneous and controlled spawns were observed via video and still imagery to document …
Diet And Prey Availability Of Sturgeons In The Penobscot River, Maine, Matthew Dzaugis
Diet And Prey Availability Of Sturgeons In The Penobscot River, Maine, Matthew Dzaugis
Honors College
Although vital to the protection and conservation of species listed under the U.S. Endangered Species Act, critical habitat of shortnose sturgeon and Atlantic sturgeon in the Penobscot River, Maine have not yet been described. Critical habitat includes food availability as well as the physical characteristics of foraging habitat. To characterize seasonal availability of benthic prey, a ponar grab was used to collect over 125 benthic samples between 21 May and 8 October 2012. Samples were stratified throughout the river and broadly categorized by sediment type. All organisms within samples were identified to the family level. To characterize diet, stomach contents …
Observing The Location And Orientation Of Nematocysts Through Aeolidiella Stephaniae, Siobhan L. Bolinger
Observing The Location And Orientation Of Nematocysts Through Aeolidiella Stephaniae, Siobhan L. Bolinger
Honors College
The anemone species Aiptasia is a nuisance pest that can quickly out-compete many species in a coral reef aquarium. The aeolid nudibranch Berghia verrucicornis, now officially known as Aeolidiella stephanieae, consumes only anemones of the Aiptasia species, a feature that has increased its popularity among aquarium overseers everywhere. Not much information exists on the digestive process of these aeolids, but what exists notes that A. stephaniae seem to house parts of the anemone it consumes in the cerata on its back, a practice commonly seen in other aeolids that feed on cnidarian species. By observing the location of …