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Articles 1 - 9 of 9
Full-Text Articles in Other Animal Sciences
Spiders In The World Of Pesticides: A Review, Jackson L. Mendillo
Spiders In The World Of Pesticides: A Review, Jackson L. Mendillo
Williams Honors College, Honors Research Projects
Pesticides and other agrochemicals have varying effects on spiders depending on their mechanism of action and dosage, ranging from behavioral changes and ataxia, to reproductive changes and physiological stress, to lethal non-target effects. Additionally, peptide Hv1a has promising effects as a more narrow-spectrum pesticide.
Exploring The Effects Of Road Salt On Earthworm Species, Alea Mry Koston
Exploring The Effects Of Road Salt On Earthworm Species, Alea Mry Koston
Williams Honors College, Honors Research Projects
This study examines the effects of two road salts, sodium chloride (NaCl) and calcium magnesium acetate (CMA), on the health of two earthworm species: Eisenia fetida and Lumbricus terrestris. Over a 4-week period, approximately 168 earthworms were exposed to varying concentrations of either NaCl, CMA, or mixed ratios of both, with a control group included for comparison. The experiment involved monitoring the changes in earthworm weight and measuring their contraction rates to determine physiological responses. Statistical analysis revealed no significant differences in weight or activity between NaCl and CMA treatments for either species. However, higher concentrations of NaCl resulted in …
Elongate Locomotors Show Consistent Torque Patterns Across Substrates, Spencer Bradford, Henry Astley
Elongate Locomotors Show Consistent Torque Patterns Across Substrates, Spencer Bradford, Henry Astley
Williams Honors College, Honors Research Projects
The four main movements found in snakes are understood mainly due to external study; however, muscular forces and resulting torques are poorly known. The main research objective is to study the torque production on different substrates using a snakebot. The study will give a rudimentary model for torque production on different substrates. It can then be compared against biological systems to understand snake movement at a muscular level. This study used a snakebot, allowing direct assessment of the current being run through each of its motors (proportional to torque). Data was then examined using a Principal Component Analysis test for …
Compliance And Roughness In Relation To Gecko Locomotion, Brooklynn Campbell
Compliance And Roughness In Relation To Gecko Locomotion, Brooklynn Campbell
Williams Honors College, Honors Research Projects
Geckos move efficiently through a variety of substrates, from swaying branches to wooden fences to the sides of structures. Previous studies have studied locomotion and adhesion on manmade and rough substrates; however, the work is limited when discussing locomotion and adhesion as a relationship of compliance and roughness. Ease of movement was quantified by speed, under the assumption that the faster a gecko moves, the easier it is for the gecko to cross the substrate. Gehyra oceanica geckos from Moorea, French Polynesia were tested on substrates varying in compliance and roughness with four different treatments in total. Compliance, roughness, and …
Amphisbaenian Head Movement And Burrowing Forces In Damp Granular Media, Jacob Newell
Amphisbaenian Head Movement And Burrowing Forces In Damp Granular Media, Jacob Newell
Williams Honors College, Honors Research Projects
Damp granular media is a difficult environment to study because it is both practically complex and it lacks equations which fully describe its behavior. In this study, an oscillatory lateral head movement and its effects while penetrating damp granular media were tested using a robophysical model. This experimental research was inspired by the burrowing behavior of the clade Amphisbaenia, a group of usually limbless squamates that employ a variety of different burrowing behaviors, but it can apply to a wide range of burrowers. This research could help with both human burrowing technologies and the further investigation of animal behaviors.
Hotline Number To Reach And Offer Agricultural Information To Plain Anabaptists During The Covid-19 Workplace Closures, Emily Shoop, Carly Becker, Nathan Glenn Briggs, Danielle Smarsh
Hotline Number To Reach And Offer Agricultural Information To Plain Anabaptists During The Covid-19 Workplace Closures, Emily Shoop, Carly Becker, Nathan Glenn Briggs, Danielle Smarsh
Journal of Amish and Plain Anabaptist Studies
The Penn State Extension Animal Systems Team developed a toll-free hotline phone number to convey short educational messages to maintain contact and outreach to Pennsylvania’s animal producing Amish, Mennonite, and other plain Anabaptist populations. During the COVID-19 pandemic, Penn State Extension’s programming went largely online via webinars, online courses, and emails. This change in programming excluded a large sector of Pennsylvania farmers who do not use or have access to the internet and, as such, were liable to miss important best management practice reviews and timely updates in animal agriculture. The Animal Systems Hotline offered callers the choice to listen …
Leptin Effects On Bone Metabolism, Elizabeth Bark
Leptin Effects On Bone Metabolism, Elizabeth Bark
Williams Honors College, Honors Research Projects
Scales from adult zebrafish, Danio rerio, are an established model for studying osteoblast and osteoclast activity. In this study, scales in a cell culture were used to determine if the hormone leptin has an effect on activity of these bone remodeling scales. Alkaline phosphatase (ALP) and tartrate-resistant acid phosphatase (TRAP) activities of zebrafish scales were measured and compared with and without leptin treatment. There was no statistically significant difference between leptin treatments in terms of ALP and TRAP activity. Differences between TRAP values between days 1 and 2 did look promising although they were not statistically significant. This study …
A Correlation Study Of The Nest Incubation Period And Hatchling Development And Success Rate For Olive Ridley Sea Turtles (Lepidocheyls Olivacea) Turtle Conservation: Playa Junquillal, Costa Rica, Natalie O'Brien
Williams Honors College, Honors Research Projects
Listed as vulnerable by the International Union for the Conservation of Nature (IUCN) the Olive Ridley sea turtle contributes to the stability of an ecosystem by transferring nutrients and energy to both the terrestrial and oceanic environment [1]. Costa Rica holds some of the most prominent nesting beaches for Olive Ridley sea turtles in the World. Collection and relocation of surveyed nests to monitored hatcheries increases the success rate significantly [2]. Realistically, nest and hatchling protection against land-based threats such as poaching, predation and beach erosion is a practical and accessible conservation measure. Facilitated by access to the sea turtle …
Relating Personality And Body Size To Social Networks And Dispersal Behavior In Female Western Mosquitofish (Gambusia Affinis), Janean Kazimir
Relating Personality And Body Size To Social Networks And Dispersal Behavior In Female Western Mosquitofish (Gambusia Affinis), Janean Kazimir
Williams Honors College, Honors Research Projects
No abstract provided.