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Articles 31 - 49 of 49
Full-Text Articles in Behavior and Ethology
Ecology, Evolution, And Sexual Selection In The Invasive, Globally Distributed Small Indian Mongoose (Urva Auropunctata), M. Aaron Owen
Ecology, Evolution, And Sexual Selection In The Invasive, Globally Distributed Small Indian Mongoose (Urva Auropunctata), M. Aaron Owen
Dissertations, Theses, and Capstone Projects
Introduced species provide rare opportunities to test evolutionary hypotheses in situ by creating so-called natural experiments. Natural experiments are situations in nature that resemble laboratory studies by allowing for comparisons of a “control” group (i.e., a species’ native range) with “experimental” groups (i.e., a species’ introduced range). In particular, introduced animals allow us to investigate evolutionary dynamics in complex, long-lived organisms in ways that would otherwise be impossible in a laboratory setting. One such introduced animal is the small Indian mongoose (Urva auropunctata, formerly Herpestes auropunctatus). Native to South Asia, the small Indian mongoose’s introduction to more …
African Wild Dog, Lycaon Pictus, Coloration Patterns And Social Aggregation, Ayong J. Kim
African Wild Dog, Lycaon Pictus, Coloration Patterns And Social Aggregation, Ayong J. Kim
Theses and Dissertations
Packs of African wild dogs, Lycaon pictus, were analyzed for coloration patterns and social aggregation tendencies. Mapped locations determined if the coat patterns followed a geographic distribution that corresponded to Southern or Eastern phenotypic forms. Social aggregation tendencies were observed to determine grouping behavior presumably related to individuals’ roles.
Does Genotype Correlate With Phenotype? Evaluating Ruffed Lemur (Varecia Spp.) Color Vision Using Subject Mediated Automatic Remote Testing Apparatus (Smarta), Raymond Vagell
Theses and Dissertations
Ruffed lemur (Varecia spp.) color vision research was conducted using a multidisciplinary approach: psychophysics, genetic analysis, technology, and animal training. The behavioral manifestation of Varecia spp. trichromacy was shown using a touchscreen apparatus (SMARTA). Trichromats performed better than dichromats when discriminating red from green (G2 = 78.10, p < 0.001).
Models And Methods In Cultural And Social Evolution, Elliot G. Aguilar
Models And Methods In Cultural And Social Evolution, Elliot G. Aguilar
Dissertations, Theses, and Capstone Projects
Chapter 1 The mathematical study of genealogies has yielded important insights in population biology, such as the ability to estimate the time to the most recent common ancestor (MRCA) of a sample of genetic sequences or of a group of individuals. Here we introduce a model of cultural genealogies that is a step toward answering similar questions for cultural traits. In our model individuals can inherit from a variable, potentially large number of ancestors, rather than from a fixed, small number of ancestors (one or two) as is typical of genetic evolution. We first show that, given a sample of …
The Role Of Individual Cognitive And Behavioral Ontogeny In Organization And Evolution Of Social Systems, Andrew G. Fulmer
The Role Of Individual Cognitive And Behavioral Ontogeny In Organization And Evolution Of Social Systems, Andrew G. Fulmer
Dissertations, Theses, and Capstone Projects
Exploration and explanation of the relationship between individual variation in behavior and the composition and adaptive success of social groups or populations are crucial problems in the fields of behavioral ecology, ethology, and comparative psychology. These questions have been the subject of a longstanding discussion at both the proximate and ultimate levels of inquiry. Adaptive mechanisms explaining social decision making, both in terms of affiliative and competitive partner choices, are at the center of such discussions. Inclusive fitness, kin-selection, handicap or prestige, risk seeking and risk avoiding strategies, pay-to-stay/reward principles, as well as other theories have been proposed and supported …
Ménage À Trois In The Atlantic Brief Squid (Lolliguncula Brevis): Prior Presence Affects Mate Choice, Rachel A. Schlessinger
Ménage À Trois In The Atlantic Brief Squid (Lolliguncula Brevis): Prior Presence Affects Mate Choice, Rachel A. Schlessinger
Theses and Dissertations
Lolliguncula brevis given prior presence experienced a significantly greater number of contacts with opposite sex squid than rivals. Males given prior presence also spent significantly more time in proximity to females than rivals. This suggests that for both female and male Atlantic brief squid, having prior presence influences mating behavior.
A Case Study: Observations Of Behaviors & Vocalizations In A Captive Asian Elephant (Elephas Maximus) During Quarantine, Alexandra L. Dilley
A Case Study: Observations Of Behaviors & Vocalizations In A Captive Asian Elephant (Elephas Maximus) During Quarantine, Alexandra L. Dilley
Theses and Dissertations
Bozie, an Asian elephant (Elephas maximus), was relocated from the Baton Rouge Zoo to Smithsonian’s National Zoo. During a requisite 29-day quarantine period, I recorded Bozie’s stress-related behaviors and the vocalizations she produced when she was alone and with her keepers in free and protected contact.
Investigating The Nest Sanitation Hypothesis In A Rejecter Species: Is Sanitation A Proximate Link, Pre-Adaptation, Or By-Product Of Egg Ejection?, Alec B. Luro
Theses and Dissertations
Nest sanitation, a behavior similar in motor pattern to egg ejection, has been proposed repeatedly as a potential pre-adaptation to foreign egg ejection in avian brood parasites hosts. We found no support for the sanitation hypothesis--therefore we suggest egg ejection may have evolved independently of sanitation.
When Human-Leopard Conflict Turns Deadly: A Cross-Country Situational Analysis, Julie S. Viollaz
When Human-Leopard Conflict Turns Deadly: A Cross-Country Situational Analysis, Julie S. Viollaz
Dissertations, Theses, and Capstone Projects
Habitat destruction and pollution are two of the main causes for the decline of the planet’s biodiversity. Yet environmentalists are now recognizing that illegal wildlife killings, both poaching and retaliatory killings due to human-wildlife conflict, are perhaps the next major threat. Biologists have researched illegal killings and their effect on species conservation, but few researchers have applied criminological principles of crime reduction to them. This research will explore the situational factors that drive retaliatory leopard killings in parts of South Africa, Kenya, and India. These factors, human and environmental, include local expectations from wildlife, sensitivity to environmental issues, communication between …
A Generalist Brood Parasite Modifies Use Of A Host In Response To Reproductive Success, Matthew I M Louder, Wendy M. Schelsky, Amber N. Albores, Jeffrey P. Hoover
A Generalist Brood Parasite Modifies Use Of A Host In Response To Reproductive Success, Matthew I M Louder, Wendy M. Schelsky, Amber N. Albores, Jeffrey P. Hoover
Publications and Research
Avian obligate brood parasites, which rely solely on hosts to raise their young, should choose the highest quality hosts to maximize reproductive output. Brown-headed cowbirds (Molothrus ater) are extreme host generalists, yet female cowbirds could use information based on past reproductive outcomes to make egg-laying decisions thus minimizing fitness costs associated with parasitizing low quality hosts. We use a long-term (21 years) nest box study of a single host, the prothonotary warbler (Protonotaria citrea), to show that local cowbird reproductive success, but not host reproductive success, was positively correlated with the probability of parasitism the following …
Age-Related Aspects Of Mirror-Use By Bottlenose Dolphins (Tursiops Truncatus), Rachel A. Morrison
Age-Related Aspects Of Mirror-Use By Bottlenose Dolphins (Tursiops Truncatus), Rachel A. Morrison
Dissertations, Theses, and Capstone Projects
Bottlenose dolphins are neuroanatomically different and evolutionarily divergent from primates yet they exhibit mirror self-recognition (MSR), a rare cognitive ability in non-human animals. This research investigated the developmental and age-related aspects of MSR in this species. During a longitudinal study, a social group of bottlenose dolphins at the National Aquarium, Baltimore, MD were exposed to a mirror and their behavioral responses were recorded to: 1) further confirm the presence of MSR in this species, 2) determine the age of emergence of MSR and 3) draw comparisons with data documenting the emergence of this ability in humans and great ape species. …
Testing Assumptions Of Coevolution In An Egg-Rejecting Brood Parasite Host: Uncovering Sensory, Cognitive, And Evolutionary Drivers Of Responses To Parasitism In American Robins (Turdus Migratorius), Rebecca Croston
Dissertations, Theses, and Capstone Projects
Hosts of brood parasitic birds face fitness costs associated with rearing unrelated offspring. In response, the recognition and rejection of parasitic eggs is a common host defense. Brown-headed cowbirds (Molothrus ater) challenge coevolutionary theory, because although they exploit over 200 host species, they lay non-mimetic eggs, and most hosts do not combat cowbird parasitism with egg rejection. American robins (Turdus migratorius) are one of a handful of cowbird hosts known to recognize and remove cowbird eggs from the nest. I addressed the mechanistic and evolutionary drivers of egg rejection in this host species, by disentangling the roles of spectral tuning …
How Important Is Land-Based Foraging To Polar Bears (Ursus Maritimus) During The Ice-Free Season In Western Hudson Bay? An Examination Of Dietary Shifts, Compositional Patterns, Behavioral Observations And Energetic Contributions, Linda J. Gormezano
Dissertations, Theses, and Capstone Projects
Trophic mismatches between predators and their prey are increasing as climate change causes decoupling of phenological relationships. Predators linked to the life histories of a particular prey will have a more difficult time persisting through environmental change unless they can alter their behavior to maintain the historical match or possess the ability to pursue alternate prey. Arctic predators typically possess flexible foraging strategies to survive in the labile environment, however, quantifying the limits of those strategies can be difficult when life history information is incomplete. In such cases, piecing together different aspects of a predator's foraging behavior, particularly when environmental …
The Fourth Level Of Social Structure In A Multi-Level Society: Ecological & Social Functions Of Clans In Hamadryas Baboons, Amy Schreier, Larissa Swedell
The Fourth Level Of Social Structure In A Multi-Level Society: Ecological & Social Functions Of Clans In Hamadryas Baboons, Amy Schreier, Larissa Swedell
Publications and Research
Hamadryas baboons are known for their complex, multi-level social structure consisting of troops, bands, and one-male units (OMUs) [Kummer, 1968]. Abegglen [1984] observed a 4th level of social structure comprising several OMUs that rested near one another on sleeping cliffs, traveled most closely together during daily foraging, and sometimes traveled as subgroups independently from the rest of the band. Abegglen called these associations “clans” and suggested that they consisted of related males. Here we confirm the existence of clans in a second wild hamadryas population, a band of about 200 baboons at the Filoha site in lowland Ethiopia. During …
Male Aggression Towards Females In Hamadryas Baboons: Conditioning, Coercion And Control, Larissa Swedell, Amy Schreier
Male Aggression Towards Females In Hamadryas Baboons: Conditioning, Coercion And Control, Larissa Swedell, Amy Schreier
Publications and Research
No abstract provided.
Use Of Palm Trees As A Sleeping Site By Hamadryas Baboons In Ethiopia, Amy Schreier, Larissa Swedell
Use Of Palm Trees As A Sleeping Site By Hamadryas Baboons In Ethiopia, Amy Schreier, Larissa Swedell
Publications and Research
Hamadryas baboons sleep on cliffs throughout their range, and this can be attributed to the safety cliffs provide against predators in the absence of tall trees. In this paper, we report the first documented occurrence of hamadryas baboons sleeping in doum palm trees rather than on cliffs. Data derive from a study of hamadryas baboons at the Filoha site in lowland Ethiopia. During all-day follows, data were collected on travel patterns, band activity, and location. Variation in the baboons’ home range was characterized using vegetation transects. We discovered that one band in this population, Band 3, occasionally slept in doum …
Strategies Of Sex And Survival In Hamadryas Baboons: Through A Female Lens, Larissa Swedell
Strategies Of Sex And Survival In Hamadryas Baboons: Through A Female Lens, Larissa Swedell
Publications and Research
No abstract provided.
Perspectives On Reproduction And Life History In Baboons, Larissa Swedell, Steven R. Leigh
Perspectives On Reproduction And Life History In Baboons, Larissa Swedell, Steven R. Leigh
Publications and Research
No abstract provided.
Infant Mortality After Takeovers In Wild Ethiopian Hamadryas Baboons, Larissa Swedell, Teklu Tesfaye
Infant Mortality After Takeovers In Wild Ethiopian Hamadryas Baboons, Larissa Swedell, Teklu Tesfaye
Publications and Research
In this paper, we report the first observational evidence of infanticide in wild hamadryas baboons. The study group inhabits the lowlands of the northern Rift Valley in Ethiopia and has been under observation for over 1200 hours, on and off, since October 1996. Here we report observations from August and September 2002 of the consequences of two takeovers of known females with black infants. After the first takeover, the respective infant disappeared and was presumed dead within eleven days of the takeover. After the second takeover, the infant incurred repeated severe aggression from its mother’s new leader male and eventually …