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Articles 1 - 30 of 48
Full-Text Articles in Life Sciences
Descriptive Study Of Adult Male Acheta Domesticus Phonotaxis, Dana Husana
Descriptive Study Of Adult Male Acheta Domesticus Phonotaxis, Dana Husana
Master's Theses
The phonotactic behavior of male Acheta domesticus has not been described at length. The present study evaluates the phonotactic responses of male A. domesticus in relation to age. Male crickets of different ages (young and old) were exposed to calls with attractive and non-attractive syllable periods for this species. Both age groups exhibited phonotaxis but did not show a preference towards the attractive call over the non-attractive ones. No significant relationship was found between age and phonotactic response. Additionally, no significant differences were observed between age and preferred syllable period. Acoustic responses were also observed in some of the older …
Density And Abundance Estimation Of West Indian Manatee, Trichechus Manatus, Between The States Of Ceará And Piauí, Northeast Brazil, Using Active Acoustics, Katherine Fiedler Choi Lima, Denis Moledo De Sousa Abessa, Daniel Gonzalez-Socoloske, Renata Sousa-Lima, Ana Carolina Oliveira De Meirelles, Cristine Pereira Negrão Silva
Density And Abundance Estimation Of West Indian Manatee, Trichechus Manatus, Between The States Of Ceará And Piauí, Northeast Brazil, Using Active Acoustics, Katherine Fiedler Choi Lima, Denis Moledo De Sousa Abessa, Daniel Gonzalez-Socoloske, Renata Sousa-Lima, Ana Carolina Oliveira De Meirelles, Cristine Pereira Negrão Silva
Faculty Publications
The West Indian manatee is one of the most threatened species in Brazil. The species has currently a patchy distribution from the state of Alagoas to the state of Amapá. The difficulty of observing manatees, especially in estuarine waters, is a challenge for conservation. Therefore, it is necessary to use new methodologies and technologies to solve manatee detection problems in their natural habitats. The goal of this study was to use an active acoustic method of detection to estimate manatee density and abundance in the estuarine complex of the Timonha and Ubatuba rivers, between the states of Ceará and Piauí, …
Editorial: An Unexpected Event Related To The Aquatic Mammals Of Latin America, Daniel Gonzalez-Socoloske
Editorial: An Unexpected Event Related To The Aquatic Mammals Of Latin America, Daniel Gonzalez-Socoloske
Faculty Publications
No abstract provided.
Ethical Issues And Standards Of Responsible Research Conduct And Monitoring In An Adventist Institution Of Higher Learning - The Babcock Experience, Kayode O. Ogunwenmo, Godswill N. Anyasor, Grace O. Tayo
Ethical Issues And Standards Of Responsible Research Conduct And Monitoring In An Adventist Institution Of Higher Learning - The Babcock Experience, Kayode O. Ogunwenmo, Godswill N. Anyasor, Grace O. Tayo
Adventist Human-Subject Researchers Association
Ethical issues and standards of responsible research conduct involving human participants are important considerations in any institution of higher learning and in particular Adventist institutions. Research conduct and ethics are reviewed and approved before they begin by the Babcock University Health Research Ethics Committee (BUHREC)
Monitoring The Immune Status Of Calves At The Agricultural Education Center, Jared Wallen
Monitoring The Immune Status Of Calves At The Agricultural Education Center, Jared Wallen
Honors Theses
Each year at the Andrews University Agriculture Education Center calves born to the resident cows and calves that are purchased are raised by the students in the animal science program. In each of the previous two years that calves have been raised, morbidities and mortalities have been observed. In order to prevent any calves from dying and reduce the rate of illness this research project was designed to monitor the calves’ immune status. By doing weekly blood draws, the total serum protein levels were determined and used as a standard for their health. Body temperature, food and water intake, and …
Editorial: Fresh Faces, A New Look, And A Bright Future For Lajam, Miriam Marmontel, Daniel Gonzalez-Socoloske
Editorial: Fresh Faces, A New Look, And A Bright Future For Lajam, Miriam Marmontel, Daniel Gonzalez-Socoloske
Faculty Publications
No abstract provided.
Analysis Of Body Condition Indices Reveals Different Ecotypes Of The Antillean Manatee, D. N. Castelblanco-Martínez, D. H. Slone, S. S. Landeo-Yauri, E. A. Ramos, A. Alvarez-Alemán, F. L. N. Attademo, C. A. Beck, R. K. Bonde, S. M. Butler, L. J. Cabrias-Contreras, D. Caicedo-Herrera, J. Galves, I. V. Gómez-Camelo, Daniel Gonzalez-Socoloske, J. Jiménez-Domínguez, F. O. Luna, Y. Mona-Sanabria, J. B. Morales-Vela, L. D. Olivera-Gómez, J. A. Padilla-Saldívar, J. Powell, J. P. Reid, G. Rieucau, A. A. Mignucci-Giannoni
Analysis Of Body Condition Indices Reveals Different Ecotypes Of The Antillean Manatee, D. N. Castelblanco-Martínez, D. H. Slone, S. S. Landeo-Yauri, E. A. Ramos, A. Alvarez-Alemán, F. L. N. Attademo, C. A. Beck, R. K. Bonde, S. M. Butler, L. J. Cabrias-Contreras, D. Caicedo-Herrera, J. Galves, I. V. Gómez-Camelo, Daniel Gonzalez-Socoloske, J. Jiménez-Domínguez, F. O. Luna, Y. Mona-Sanabria, J. B. Morales-Vela, L. D. Olivera-Gómez, J. A. Padilla-Saldívar, J. Powell, J. P. Reid, G. Rieucau, A. A. Mignucci-Giannoni
Faculty Publications
Assessing the body condition of wild animals is necessary to monitor the health of the population and is critical to defining a framework for conservation actions. Body condition indices (BCIs) are a non-invasive and relatively simple means to assess the health of individual animals, useful for addressing a wide variety of ecological, behavioral, and management questions. The Antillean manatee (Trichechus manatus manatus) is an endangered subspecies of the West Indian manatee, facing a wide variety of threats from mostly human-related origins. Our objective was to define specific BCIs for the subspecies that, coupled with additional health, genetic and …
A Note On The Onset Of Synchronous Egg Laying In A Seabird Behavior Model, Dorothea Gallos, Christiane Gallos
A Note On The Onset Of Synchronous Egg Laying In A Seabird Behavior Model, Dorothea Gallos, Christiane Gallos
Honors Theses
Protection Island, Washington hosts a large colony of Glaucous-winged gulls (Larus glaucescens). These birds are known to exhibit every-other-day egg-laying synchrony in dense areas of the colony in response to egg cannibalism, which is the main source of egg loss. Here we present an equilibrium analysis of a discrete-time animal behavior model for egg laying. We use Jury Conditions to find the stability criteria for the equilibrium as a function of the colony density and show that a 2-cycle bifurcation occurs when the equilibrium loses stability. The 2-cycle pattern in egg laying becomes increasingly synchronous as the colony density increases. …
Effects Of Eggshell Coloration On Egg Cannibalism Among Glaucous-Winged Gulls, Isabelle Hwang
Effects Of Eggshell Coloration On Egg Cannibalism Among Glaucous-Winged Gulls, Isabelle Hwang
Honors Theses
A common source of reproductive loss in gulls is egg cannibalism. At a large Glaucous-winged Gull (Larus glaucescens) colony on Protection Island, Washington, cannibalism accounts for 55% of egg loss. Because cannibalism is a form of predation and birds have a highly developed sense of vision, I hypothesized that visible light coloration of Glaucous-winged Gull eggs plays a role in determining whether they are cannibalized. I used logistic regression to test whether egg fate was related to egg brightness, specific coloration, specific spot coverage, coloration relative to the most common coloration, and spot coverage relative to the most common spot …
P-46 A Periodic Matrix Model Of Seabird Behavior And Population Dynamics, Mykhaylo M. Malakhov, Benjamin Macdonald, Shandelle M. Henson, J. M. Cushing
P-46 A Periodic Matrix Model Of Seabird Behavior And Population Dynamics, Mykhaylo M. Malakhov, Benjamin Macdonald, Shandelle M. Henson, J. M. Cushing
Honors Scholars & Undergraduate Research Poster Symposium Programs
Rising sea surface temperatures (SSTs) in the Pacific Northwest lead to food resource reductions for surface-feeding seabirds, and have been correlated with several marked behavioral changes. Namely, higher SSTs are associated with increased egg cannibalism and egg-laying synchrony in the colony. We study the long-term effects of climate change on population dynamics and survival by considering a simplified, cross-season model that incorporates both of these behaviors in addition to density-dependent and environmental effects. We show that cannibalism can lead to backward bifurcations and strong Allee effects, allowing the population to survive at lower resource levels than would be possible otherwise.
Time Lags Associated With Effects Of Oceanic Conditions On Seabird Breeding In The Salish Sea Region Of The Northern California Current System, Rashida S. Smith, Lynelle M. Weldon, James L. Hayward, Shandelle M. Henson
Time Lags Associated With Effects Of Oceanic Conditions On Seabird Breeding In The Salish Sea Region Of The Northern California Current System, Rashida S. Smith, Lynelle M. Weldon, James L. Hayward, Shandelle M. Henson
Faculty Publications
No abstract provided.
Chesapeake Aquaculture, Garth Woodruff
A Compartmental Model Of Animal Behavior, Saharsh Dass
A Compartmental Model Of Animal Behavior, Saharsh Dass
Honors Theses
Animal behavior is integral to fitness and arises from complex interactions between internal and external factors. An understanding of how external environmental factors drive animal behavior is important for understanding the way organisms adapt to environmental perturbations such as climate change. Glaucous-winged gulls (Larus glaucescens) at Protection Island, Strait of Juan de Fuca, Washington display a variety of behaviors on the colony during the breeding season. The most common gull behaviors are sleeping, preening, and resting. I used a system of four differential equations to predict numbers of sleeping, preening, and resting gulls on the colony as a function of …
Analysis Of Mammalian Carboxypeptidase O Expression Patterns, Christian Bardan
Analysis Of Mammalian Carboxypeptidase O Expression Patterns, Christian Bardan
Honors Theses
Carboxypeptidase 0 (CPO) is a protease that cuts acidic amino acids from the carboxy termini of substrate proteins. This study aims to describe the expression patterns of CPO in small mammals. We have sampled tissue from four different species: thirteen-lined ground squirrel, eastern chipmunk, eastern mole, and northern short-tailed shrew. Samples were analyzed via Western blot using two CPO antibodies. Immunoreactive bands likely to be CPO, with molecular weights approximately 42 kDa, were seen predominantly in kidney, liver, and intestinal tissue samples. This suggests CPO could play a specific physiological function in these organs.
Biodiversity And You., Garth Woodruff
Data For Henson Et Al. 2016, Shandelle Henson, James Hayward, J Cushing, Gordon Atkins, Sumiko Weir, Ashley Reichert, Wayanne Watson, Wadenerson Saint Martin, Amanda Sandler
Data For Henson Et Al. 2016, Shandelle Henson, James Hayward, J Cushing, Gordon Atkins, Sumiko Weir, Ashley Reichert, Wayanne Watson, Wadenerson Saint Martin, Amanda Sandler
Faculty Publications
These data are archived for the paper "Adaptation to short-term ENSO fluctuations may provide tipping points for populations subjected to long-term climate change" by Henson et al., submitted. Additional files: Supplementary Figure 1 | Sample plots on Violet Point, Protection Island National Wildlife Refuge, Washington, USA. The larger colony extends throughout much of the spit.
Henson Et Al Supplementary Figure 1.Pdf, Shandelle Henson
Henson Et Al Supplementary Figure 1.Pdf, Shandelle Henson
Faculty Publications
Supplementary Figure 1 | Sample plots on Violet Point, Protection Island National WildlifeRefuge, Washington, USA. The larger colony extends throughout much of the spit.
Data For Henson Et Al. 2016, Shandelle M. Henson, James L. Hayward, J M. Cushing, Gordon Atkins, Sumiko K. Weir, Ashley A. Reichert, Wayanne Watson, Wadenerson Saint Martin, Amanda Sandler
Data For Henson Et Al. 2016, Shandelle M. Henson, James L. Hayward, J M. Cushing, Gordon Atkins, Sumiko K. Weir, Ashley A. Reichert, Wayanne Watson, Wadenerson Saint Martin, Amanda Sandler
Shandelle M. Henson
These data are archived for the paper "Adaptation to short-term ENSO fluctuations may provide tipping points for populations subjected to long-term climate change" by Henson et al., submitted.
Additional files:
Supplementary Figure 1 | Sample plots on Violet Point, Protection Island National WildlifeRefuge, Washington, USA. The larger colony extends throughout much of the spit.
Modeling Animal Behavior In A Changing Environment, Shandelle M. Henson, James M. Cushing, James L. Hayward
Modeling Animal Behavior In A Changing Environment, Shandelle M. Henson, James M. Cushing, James L. Hayward
Faculty Publications
No abstract provided.
Exploration Of The Range Overlap Between Cynomys Leucurus And Cynomys Ludovicianus, Kenneth D. Choi
Exploration Of The Range Overlap Between Cynomys Leucurus And Cynomys Ludovicianus, Kenneth D. Choi
Honors Theses
The ranges of two species of prairie dogs, Cynomys leucurus and Cynomys ludovicianus, overlap in a narrow area in the western Great Plains in Wyoming. We used GIS software to map their distributions and infer land cover preferences within and on either side of the zone of overlap. In general, both species used habitats in proportion to their availability and did not display strong selection of their expected vegetation types (based on the literature). However, both species of prairie dogs were overrepresented in areas of human settlements and crops, which may indicate that these species prefer human-modified habitats, or perhaps …
P-10 The Relationship Between Equine Temperament And Behavior As Affected Over Time By The Skill Level Of The Riders, Taylor Huffman
P-10 The Relationship Between Equine Temperament And Behavior As Affected Over Time By The Skill Level Of The Riders, Taylor Huffman
Honors Scholars & Undergraduate Research Poster Symposium Programs
The goal in this study is to observe the incidence of undesirable behaviors by horses at summer camp and determine if it could possibly be explained by the stress of being ridden by riders with varying ability during the course of a camp season. It is hypothesized that incidence and severity of undesirable behavior will be related to the temperament of the horse. Each horse was evaluated for temperament at the beginning of the summer camp season, every rider received an evaluation for riding skill level, and all incidents and lengths of trail were recorded. Results analysis is in progress.
P-11 Determining Social Preference Of Holstein Cows Based On Stall Selection, Yoona Kang
P-11 Determining Social Preference Of Holstein Cows Based On Stall Selection, Yoona Kang
Honors Scholars & Undergraduate Research Poster Symposium Programs
Cows, like other animals, have dominance hierarchies but there is anecdotal evidence that cows also have preferred herd mates with whom they spend more time. This research project sought to gain more detail about cow social groups at the Andrews University Dairy by determining the relative social ranking of cows within two different lots and the social groupings within each lot. The dominance ranking was inferred by observing which cows occupy the more desirable stalls. The social groupings were then determined by which cows lie near each other more often over the course of the observations.
Data For Sandler Et Al. 2015, Amanda Sandler, Libby Megna, James Hayward, Shandelle Henson, Cynthia Tkachuck, Richard Tkachuck
Data For Sandler Et Al. 2015, Amanda Sandler, Libby Megna, James Hayward, Shandelle Henson, Cynthia Tkachuck, Richard Tkachuck
Faculty Publications
These data are archived for the paper "Every-other-day clutch-initiation synchrony in ring-billed gulls (Larus delawarensis)" by Sandler et al., submitted
Data For Sandler Et Al. 2015, Amanda G. Sandler, Libby C. Megna, James L. Hayward, Shandelle M. Henson, Cynthia M. Tkachuck, Richard D. Tkachuck
Data For Sandler Et Al. 2015, Amanda G. Sandler, Libby C. Megna, James L. Hayward, Shandelle M. Henson, Cynthia M. Tkachuck, Richard D. Tkachuck
Shandelle M. Henson
These data are archived for the paper "Every-other-day clutch-initiation synchrony in ring-billed gulls (Larus delawarensis)" by Sandler et al., submitted
First Successful Capture And Satellite Tracking Of A West Indian Manatee (Trichechus Manatus) In Panama: Feasibility Of Capture And Telemetry Techniques, Daniel Gonzalez-Socoloske, James P. Reid, Carlos Espinoza-Marin, Kherson E. Ruiz, Kenneth E. Glander, Leon David Olivera-Gomez
First Successful Capture And Satellite Tracking Of A West Indian Manatee (Trichechus Manatus) In Panama: Feasibility Of Capture And Telemetry Techniques, Daniel Gonzalez-Socoloske, James P. Reid, Carlos Espinoza-Marin, Kherson E. Ruiz, Kenneth E. Glander, Leon David Olivera-Gomez
Faculty Publications
It is currently unknown how important the Central American countries south of Belize are as a link between manatee populations in the north (Belize and Mexico) and populations in South America. Therefore, apart from knowing where manatees are found, it is important to understand how manatees are using these habitats and if they are moving between countries or distinct population centers. Here we report the results of a multi-national and multiinstitutional collaboration resulting in the first successful capture and satellite tracking of a West Indian manatee in southern Central America.
Data For Henson Et Al. 2014, Shandelle M. Henson, James L. Hayward, Gordon Atkins, Amanda Sandler, Wadenerson Saint Martin
Data For Henson Et Al. 2014, Shandelle M. Henson, James L. Hayward, Gordon Atkins, Amanda Sandler, Wadenerson Saint Martin
Faculty Publications
These data are archived for the paper "Changing sea surface temperature alters timescale of reproductive synchrony in seabirds" by Henson et al., currently submitted to Nature.
P-26 Hawksbill Turtle (Eretmochelys Imbricata) Density And The Effect Of Pollution Debris On The Crawling Rates Of Hawksbill Hatchlings In Utila, Honduras, Kyungje Sung, Stephen Dunbar, H. Thomas Goodwin
P-26 Hawksbill Turtle (Eretmochelys Imbricata) Density And The Effect Of Pollution Debris On The Crawling Rates Of Hawksbill Hatchlings In Utila, Honduras, Kyungje Sung, Stephen Dunbar, H. Thomas Goodwin
Honors Scholars & Undergraduate Research Poster Symposium Programs
The hawksbill turtle (Eretmochelys imbricata) is a critically endangered species. Hence, various conservation efforts by groups such as ProTECTOR are taking place to stabilize its population. To support such efforts, my study focused on the turtle population in and around the island of Utila, Honduras. Specifically, I examined the critical migration period of hawksbill turtle hatchlings from nest to water to determine if various densities of plastic pollution had an effect on crawling times. A reduction in crawling time is critical for it could increase predation time. Furthermore, the pollution debris may deter movement, causing the hatchling to …
P-28 The Prevalence Of Encysted Toxoplasma & Sarcocystis In Consumer-Grade Pork, Beef, And Mutton In Michiana, Ross Trecartin
P-28 The Prevalence Of Encysted Toxoplasma & Sarcocystis In Consumer-Grade Pork, Beef, And Mutton In Michiana, Ross Trecartin
Honors Scholars & Undergraduate Research Poster Symposium Programs
Commonly present in the muscle of animals are the tissue cysts of Toxoplasma and Sarcocystis. The aim of this study was to determine the presence and levels of Toxoplasma/Sarcocystis tissue cysts in retail pork, beef, and mutton throughout the Michiana area. A total of 36 samples, 12 from each species, were exposed to a digestive solution mimicking stomach conditions. The solution consisted of Pepsin 0.75% , NaCl 0.86%, and HCl adjusted to a pH of 1-2. The digested samples were then strained through several layers of cheesecloth, centrifuged, and examined for the presence of parasites.
Spatial And Seasonal Signals In Stable Isotopes Of Incisor Enamel From Free-Ranging, Thirteen-Lined Ground Squirrels, Jacob Andrew Brassington
Spatial And Seasonal Signals In Stable Isotopes Of Incisor Enamel From Free-Ranging, Thirteen-Lined Ground Squirrels, Jacob Andrew Brassington
Honors Theses
From early May through late September, 2012, we captured, tagged, and collected body masses from multiple, free-ranging thirteen-lined ground squirrels (Ictidomys tridecemlineatus) in southwestern Michigan, with 14 individuals recaptured 1 or more times through the season. Beginning in mid-June, we captured and euthanized 12 or these individuals (on average, about 1 per week) to allow study of their lower incisors. We serially micro-sampled enamel along squirrel incisors using laser ablation and determined stable isotope ratios (d13 and d18 O) with gas chromatography-isotope-ratio mass spectrometry (GC-IRMS). The resulting values fell into two spatial groups. Specimens collected within 25 m of a …
Socially Induced Ovulation Synchrony And Its Effect On Seabird Population Dynamics, Shandelle M. Henson, J. M. Cushing, James L. Hayward
Socially Induced Ovulation Synchrony And Its Effect On Seabird Population Dynamics, Shandelle M. Henson, J. M. Cushing, James L. Hayward
Faculty Publications
Spontaneous oscillator synchrony is a form of self-organization in which populations of interacting oscillators ultimately cycle together. This phenomenon occurs in a wide range of physical and biological systems. In rats and humans, oestrous/menstrual cycles synchronize through social stimulation with pheromones acting as synchronizing signals. In previous work, we showed that glaucous-winged gulls (Larus glaucescens) can lay eggs synchronously on an every-other-day schedule, and that synchrony increases with colony density. We posed a discrete-time mathematical model for reproduction during the breeding season based on the hypothesis that pre-ovulatory luteinizing hormone surges synchronize by means of visual, auditory and/or olfactory cues. …