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Foraging Behavior Of Eastern Gray Squirrels On The University Of Maine Campus, Aimee Young
Foraging Behavior Of Eastern Gray Squirrels On The University Of Maine Campus, Aimee Young
Honors College
The goal of this study was to observe the foraging behavior of Eastern Gray Squirrels (Sciurus carolinensis) on the University of Maine campus. The study tested whether squirrels in a more urban setting followed the optimal foraging theory, or if rarity of a food type played a greater factor in food selection. The study also examined whether urban squirrel behavior mimicked that of wild squirrels when presented with a food type uncommon on campus, but common in other parts of Maine, specifically the acorns of the white oak tree (Quercus alba). In three different areas on the campus, squirrels were …
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 …
The Phylogeny And Biogeography Of The Monito Del Monte (Dromiciops Gliroides) And Its Relatives, Ariel Berthel
The Phylogeny And Biogeography Of The Monito Del Monte (Dromiciops Gliroides) And Its Relatives, Ariel Berthel
Honors College
Marsupials are a group of mammals that give birth to young that are not fully developed. These offspring must complete the remainder of their development outside of the womb attached to their mother’s teat. Marsupials only occur in South America and Australasia, with one species extending into North America. The marsupial known as the monito del monte, which is Spanish for ‘little monkey of the mountain,’ (Dromiciops gliroides) is a South American marsupial; however, it shares a key morphological feature of ankle bone morphology with Australasian marsupials. This shared, derived trait is what defines the cohort Australidelphia, to which the …
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 …
Testing The Effect Of Grapefruit Seed Extract (Gfse) On The Mastitsis-Causing Alga, Prototheca, Kendra Janelle Macdonald
Testing The Effect Of Grapefruit Seed Extract (Gfse) On The Mastitsis-Causing Alga, Prototheca, Kendra Janelle Macdonald
Honors College
Mastitis is an inflammation of the mammary gland that costs the United States dairy industry between $1.7 and $2 billion annually [9]. Approximately 97% of mastitis infections are caused by bacteria, which can be treated with antibiotics [2]. However, mastitis infections can be caused by the alga, Prototheca. Specifically, it is P. zopfii (genotype 2) and P. blaschkeae that have been found in cows with mastitis [7]. There are currently no approved treatments for protothecal mastitis. The following experiments a tested the effects of grapefruit seed extract (GFSE) on P. zopfii (genotype 2) using spectrophotometry and plating techniques. GFSE was …
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 …
Bayesian Analysis Of Data On Nest Success For Marsh Birds, Sean Hardy
Bayesian Analysis Of Data On Nest Success For Marsh Birds, Sean Hardy
Honors College
Bayesian methods are an increasingly popular form of statistical analysis which uses informative prior distributions to help calculate posterior distributions of models that represent different hypotheses. Frequentist methods are contrasting methods that are used more commonly and more well known, but have come under recent criticism. I examined data gathered by Ellen Robertson, who used information theoretic methods for a Masters’ Thesis in Ecology and Environmental Science at the University of Maine to analyze the daily survival probabilities of marsh birds with a Bayesian perspective in order to get a sense of the Bayesian analysis. Results were as expected; when …
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 …