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Articles 1291 - 1320 of 2993
Full-Text Articles in Ecology and Evolutionary Biology
Identifying Roadkill Hotspots Using A Running Average, Kori A. Ogletree, Alfred J. Mead, Evan R. Boitet
Identifying Roadkill Hotspots Using A Running Average, Kori A. Ogletree, Alfred J. Mead, Evan R. Boitet
Georgia Journal of Science
The identification of roadkill hotspots is necessary prior to the consideration of wildlife road mortality mitigation measures. In a previous study, 178 roadkill specimens were tallied via a driving survey along 21.4 km (13.3 mi) on three connected roadways in Baldwin County, Georgia. Roadkill locations were recorded to the nearest 0.16 km (0.1 mi) using the vehicle odometer. In the current study, location data were used to generate three graphical displays of roadkill distribution: 1) a linear graph of roadkills per 0.16 km (0.1 mi) bin; 2) a linear graph of roadkills per 0.8 km (0.5 mi) bin; and 3) …
Guided Alligator Tours Or Raccoon Schooling (Gators), Paul List
Guided Alligator Tours Or Raccoon Schooling (Gators), Paul List
Senior Theses
In my two main internships during college, I worked closely with two very different animals: raccoons and alligators. Additionally, I gained experience in presenting educational programs during my internship at Fripp Island, where my most common program was our Gator Walk. For my thesis project, I built upon my experience in interpretive programming, drawing on my experience with alligators and raccoons to develop a unique educational program to present at Congaree National Park. This report will describe the process of developing this program as well as it’s implementation and outcomes. In addition, it includes a review of scholarly literature on …
Microhabitat Comparison Of Percina Roanoka (Roanoke Darter) And Percina Nevisense (Chainback Darter) In The Roanoke River, Dakota R. Spruill, Steven L. Powers
Microhabitat Comparison Of Percina Roanoka (Roanoke Darter) And Percina Nevisense (Chainback Darter) In The Roanoke River, Dakota R. Spruill, Steven L. Powers
Virginia Journal of Science
Snorkel observations of Percina roanoka and P. nevisense in the Roanoke River during summer months were followed by measuring current velocity, water depth, and substrate diameter at points of occupation. A total of 89 observations of P. roanoka and 81 observations of P. nevisense were compared using two-sample T-tests. Percina roanoka inhabited faster, shallower water than P. nevisense with the former found in a mean flow of 0.318 m/s and depth of 31.53 cm and the latter in a mean flow of 0.17 m/s and depth of 55.6 cm. Mean diameter of substrate at points of occupation did not …
A Survey Of Beetle Diversity (Order Coleoptera) On Lizard Island, John Mccormack
A Survey Of Beetle Diversity (Order Coleoptera) On Lizard Island, John Mccormack
Independent Study Project (ISP) Collection
The beetles (order Coleoptera) of Lizard Island, a small granitic island on the mid shelf of the Great Barrier Reef, have never been assessed in the scientific literature. Prior to our work, only a single beetle genus had been documented on the island (Caryotrypes Decelle, 1968), based on a single specimen collected in 1993 (Reid & Beatson 2013). We conducted a survey of Lizard Island in April 2019 to determine which beetle families are present on the island and which families are the most diverse. The survey also assessed the beetle diversity in different habitats on the island and two …
The Giant Rodents Of Sumak Allpa: A Preliminary Study Of The Ecological Niche Of Amazonian Capybaras In Ecuador, Brynn Furey
The Giant Rodents Of Sumak Allpa: A Preliminary Study Of The Ecological Niche Of Amazonian Capybaras In Ecuador, Brynn Furey
Independent Study Project (ISP) Collection
Sumak Allpa is an island on the Napo River in the eastern rainforest of the Orellana Province of Ecuador that functions as a rehabilitation center for primates. The objective of this investigation is to conduct a preliminary study on the ecological niche of the Amazonian capybaras ( Hydrochoerus hydrochaeris ) that inhabit Sumak Allpa and a small adjacent island known in this study as Island A. Very little information is known about jungle capybaras, especially in Ecuador, and this study aims to establish baseline information about their distribution, diet, and population dynamics. Research was conducted throughout the day, with mornings …
Breeding Record Of The Hooded Vulture Necrosyrtes Monachus (Timminek, 1823) At Emi Abumo Woro, Kogi State, Nigeria, K. L. Adang, D. Tanko, K. L. Saliu, Umarfarooq Abdulwahab
Breeding Record Of The Hooded Vulture Necrosyrtes Monachus (Timminek, 1823) At Emi Abumo Woro, Kogi State, Nigeria, K. L. Adang, D. Tanko, K. L. Saliu, Umarfarooq Abdulwahab
Watershed Sciences Student Research
The hooded vulture Necrosyrtes monachus is a critically endangered species and recently published evidence suggests that its population is experiencing an extremely rapid decline, owing to indiscriminate poisoning, trade for traditional medicine, hunting, persecution, electrocution, habitat loss and degradation. As a result of these threats, the species is gradually disappearing from its range and thus, the sighting of vultures or their nests is becoming very rare. This paper thus, presents a report on the sighting of the Hooded Vulture and its nest at Emi Abumo Woro Village, Kogi State, Nigeria. This is an evident and equally an indication that Emi …
Assessment Of Wildlife Rehabilitation Trends: Domestic Dog And Cat Attacks, Rachel Wilson
Assessment Of Wildlife Rehabilitation Trends: Domestic Dog And Cat Attacks, Rachel Wilson
Undergraduate Honors Thesis Projects
Human-wildlife conflict is a growing concern, and domestic cat predation is estimated to be responsible for billions of wildlife deaths every year in the Unites States. Domestic dog predation has been less well studied, but as dogs are the second most numerous pet in the U.S. after cats, their impact on native wildlife should also be assessed. One method to assess domestic animal predation is to examine trends in wildlife rehabilitation records. Using the online database WILD-ONe, I analyzed over 31,000 wildlife hospital records in the United States from 2011-2016. During this time span, data showed over 14,000 domestic dog …
Improving Risk Assessment Of The Emergence Of Novel Influenza A Viruses By Incorporating Environmental Surveillance, Kim M. Pepin, Matthew W. Hopken, Susan A. Shriner, Erica Spackman, Zaid Abdo, Colin Parrish, Steven Steven, James O. Lloyd-Smith, Antoinette J. Piaggio
Improving Risk Assessment Of The Emergence Of Novel Influenza A Viruses By Incorporating Environmental Surveillance, Kim M. Pepin, Matthew W. Hopken, Susan A. Shriner, Erica Spackman, Zaid Abdo, Colin Parrish, Steven Steven, James O. Lloyd-Smith, Antoinette J. Piaggio
United States Department of Agriculture Wildlife Services: Staff Publications
Reassortment is an evolutionary mechanism by which influenza A viruses (IAV) generate genetic novelty. Reassortment is an important driver of host jumps and is widespread according to retrospective surveillance studies.However, predicting the epidemiological risk of reassortant emergence in novel hosts from surveillance data remains challenging. IAV strains persist and cooccur in the environment, promoting co-infection during environmental transmission. These conditions offer opportunity to understand reassortant emergence in reservoir and spillover hosts. Specifically, environmental RNA could provide rich information for understanding the evolutionary ecology of segmented viruses, and transform our ability to quantify epidemiological risk to spillover hosts. However, significant challenges …
An Endemic Species In A Protected Area: Euscorpius Carpathicus (L., 1767) In The Cozia National Park, Romania (Scorpiones: Euscorpiidae), Severus-Daniel Covaciu-Marcov, Sára Ferenţi
An Endemic Species In A Protected Area: Euscorpius Carpathicus (L., 1767) In The Cozia National Park, Romania (Scorpiones: Euscorpiidae), Severus-Daniel Covaciu-Marcov, Sára Ferenţi
Euscorpius
In 2016-2018, we identified 48 distribution records of Euscorpius carpathicus in the Cozia National Park, from the Romanian Southern Carpathians. The Carpathian scorpion was found between 300 and 847 m a.s.l., in forested regions, being more numerous in the lower areas situated along the Olt River. E. carpathicus is a native species in the region; it populates natural areas with low human impact.
The Nebraska Bird Review, Volume 87 March 2019 Number 1
The Nebraska Bird Review, Volume 87 March 2019 Number 1
Nebraska Bird Review
NOU Annual Treasurer's Report for 2018, by Jan Johnson … 2
Winter Field Report, Dec. 2018 - Feb. 2019, by W. Ross Silcock …3
2018 - 2019 Christmas Bird Counts, by Don Paseka …15-16 & 25-38
Annual Color Photo Section …17-24
Subscription and Organization Information … 39
2018-2019 Christmas Bird Counts, Don Paseka
2018-2019 Christmas Bird Counts, Don Paseka
Nebraska Bird Review
Eighteen counts were held during the 2018-19 Christmas Bird Count season. This is two more than were done last season, which was the first time that as many as sixteen counts were held. This year no counts were postponed or cancelled, and the Beaver Valley Count was revived after a four year hiatus. Twelve of the counts were done during the first week of the count period. While the conditions for these early counts were mild and dry, heavy precipitation in late fall coupled with an early onset of cold weather in the first part of December resulted in little …
Annual Color Photo Section (2019)
Annual Color Photo Section (2019)
Nebraska Bird Review
LeConte's Sparrow, Little Salt Fork Marsh, Lancaster Co., 22 Oct. 2018. Photo by Ruth Stearns.
Harris's Sparrow and Whitecrowned Sparrow, Polk Co., 29 Oct. 2018. Photo by Jan Johnson.
Vesper Sparrow, Chimney Rock Road, Morrill Co., 18 Sept. 2017. Photo by Clem Klaphake.
Fox Sparrow, Mahoney State Park, Cass Co., 25 Feb 2019. Photo by Elizabeth Winter.
Adult Bald Eagle, Chalco Hills Recreation Area, Sarpy Co., 25 Jan. 2019. Photo by Mike Schilmoeller.
White-winged Dove, photographer's yard,Wahoo, Saunders Co., 19 May 2019. Photo by Joe Freeborn.
Juvenile Cooper's Hawk, midtown Omaha, Douglas Co,. 18 Aug. 2014. Photo by Craig Crews. …
A Review Of Orthochirus From Turkey, Iraq, And Iran (Khoozestan, Ilam, And Lorestan Provinces), With Descriptions Of Three New Species (Scorpiones: Buthidae), František Kovařík, Ersen Aydın Yağmur, Victor Fet, Fenik S. Hussen
A Review Of Orthochirus From Turkey, Iraq, And Iran (Khoozestan, Ilam, And Lorestan Provinces), With Descriptions Of Three New Species (Scorpiones: Buthidae), František Kovařík, Ersen Aydın Yağmur, Victor Fet, Fenik S. Hussen
Euscorpius
Three new species, Orthochirus fomichevi sp. n. from Turkey and Iraq, O. gantenbeini sp. n. from Iran (Khoozestan Province), and O. navidpouri sp. n. from Iran (Khoozestan and Lorestan Provinces) are described, compared with other Orthochirus species from the region, and fully illustrated with color photos. Lectotype of O. mesopotamicus Birula, 1918 stat. n. from Iran (Khoozestan Province) is designated. Emended diagnoses are given for O. iranus Kovařík, 2004, O. iraqus Kovařík, 2004, O. mesopotamicus Birula, 1918 stat. n., and O. zagrosensis Kovařík, 2004. A key and a distribution map are included.
Trypanothacus Gen. N., A New Genus Of Burrowing Scorpion From The Arabian Peninsula (Scorpiones: Buthidae), Graeme Lowe, František Kovařík, Mark Stockmann, František Šťáhlavský
Trypanothacus Gen. N., A New Genus Of Burrowing Scorpion From The Arabian Peninsula (Scorpiones: Buthidae), Graeme Lowe, František Kovařík, Mark Stockmann, František Šťáhlavský
Euscorpius
We define a new fossorial buthid genus Trypanothacus gen. n., similar to Buthacus Birula, 1908, differing primarily in telson shape, with a bulbous vesicle and aculeus shorter than the vesicle, and in heavier dentition on metasomal segments II–III and IV. The new genus includes two species: T. barnesi sp. n. from Oman and T. buettikeri (Hendrixson, 2006) comb. n. from Saudi Arabia, the latter transferred from Buthacus. We provide detailed illustrations of both species from preserved materials, and in vivo habitus and natural habitat are shown for T. barnesi sp. n.. Information is also provided on ecology and captive rearing …
Scorpions Of Iran (Arachnida, Scorpiones). Part X. Alborz, Markazi And Tehran Provinces With A Description Of Orthochirus Carinatus Sp. N. (Buthidae), Shahrokh Navidpour, František Kovařík, Michael Soleglad, Victor Fet
Scorpions Of Iran (Arachnida, Scorpiones). Part X. Alborz, Markazi And Tehran Provinces With A Description Of Orthochirus Carinatus Sp. N. (Buthidae), Shahrokh Navidpour, František Kovařík, Michael Soleglad, Victor Fet
Euscorpius
Nine species of scorpions belonging to two families are reported from the Alborz, Markazi and Tehran Provinces of Iran. Of these, Compsobuthus kaftani Kovařík, 2003 is recorded from Tehran Province for the first time; Compsobuthus matthiesseni (Birula, 1905) is recorded from Alborz Province for the first time; Hottentotta saulcyi (Simon, 1880) is recorded for Alborz and Markazi Provinces for the first time; Iranobuthus krali Kovařík, 1997 is recorded for Tehran Province for the first time; Mesobuthus eupeus eupeus (C. L. Koch, 1839) is recorded from Alborz, Markazi and Tehran Provinces for the first time; Odontobuthus doriae (Thorell, 1876) is recorded …
Scorpions Of The Horn Of Africa (Arachnida: Scorpiones). Part Xix. Pandiborellius Meidensis (Karsch, 1879) And Pandinurus Fulvipes Sp. N. (Scorpionidae) From Somaliland., František Kovařík, Graeme Lowe, Tomáš Mazuch
Scorpions Of The Horn Of Africa (Arachnida: Scorpiones). Part Xix. Pandiborellius Meidensis (Karsch, 1879) And Pandinurus Fulvipes Sp. N. (Scorpionidae) From Somaliland., František Kovařík, Graeme Lowe, Tomáš Mazuch
Euscorpius
The male of Pandiborellius meidensis (Karsch, 1879) is introduced for the first time and illustrated in detail with color photos, and sexual dimorphism and occurrence of the species are discussed. Pandinurus fulvipes sp. n. from Somaliland is described and fully complemented with color photos of live and preserved specimens, as well as of its habitat.
Chaerilus Alberti Sp. N. From Malaysia (Scorpiones: Chaerilidae), František Kovařík
Chaerilus Alberti Sp. N. From Malaysia (Scorpiones: Chaerilidae), František Kovařík
Euscorpius
Chaerilus alberti sp. n. from Malaysia (Cameron Highlands) is described and fully illustrated with color photographs of preserved specimens, as well as of their habitat. Males of C. alberti sp. n. have a unique shape of chela which is stout with the manus swollen anteriorly. They are compared to other species from Southeast Asia, from all of which C. alberti sp. n. differs by the shape of pedipalp chela parallel or swollen posteriorly or medially. Pedipalp chela is illustrated with color photographs of 21 of these species.
Winter Field Report, December 2018 To February 2019, W. Ross Silcock
Winter Field Report, December 2018 To February 2019, W. Ross Silcock
Nebraska Bird Review
As has been the trend in recent winters, and despite the relative coolness of this winter, there were numerous examples of species north of expected midwinter ranges or present in higher numbers than usual in winter. The long list includes unexpected midwinter records of Tundra Swan, American Wigeon, Ring-necked Duck, Lesser Scaup, White-winged Dove, Sandhill Crane, Clark’s Grebe, Doublecrested Cormorant, Red-shouldered Hawk, and Yellow-bellied Sapsucker. Startling was the state’s first winter record of Sedge Wren, perhaps the biggest rarity of the season. And Eastern Meadowlark was documented in midwinter for the first time, although its presence in the southeast has …
Dolphins In Space: Quantifying The Relative Positions Of Bottlenose Dolphins (Tursiops Truncatus), Megan S. Mcgrath
Dolphins In Space: Quantifying The Relative Positions Of Bottlenose Dolphins (Tursiops Truncatus), Megan S. Mcgrath
Theses and Dissertations
Bottlenose dolphins (Tursiops truncatus) are socially sophisticated mammals with high fission-fusion dynamics and complex communication. The relative positioning of individual dolphins as they swim within their social group may aid in the expression of social roles. This study sought to quantify relative positioning in a small social group of female bottlenose dolphins at the National Aquarium in Baltimore that included two mother-daughter pairs, maternal and paternal half-sisters, a half-aunt and niece, and one unrelated female. We devised a method for scoring relative positioning in three dimensions. We found that the two mothers and their juvenile and adult daughters …
The Morphology And Evolution Of The Primate Brachial Plexus, Brian M. Shearer
The Morphology And Evolution Of The Primate Brachial Plexus, Brian M. Shearer
Dissertations, Theses, and Capstone Projects
Primate evolutionary history is inexorably linked to the evolution of a broad array of locomotor adaptations that have facilitated the clade’s invasion of new niches. Researchers studying the evolution of primates and of their individual locomotor adaptations have traditionally relied on bony morphology – a practical choice given the virtual non-existence of any other type of tissue in the fossil record. However, this focus downplays the potential importance of the many other structures involved in locomotion, such as muscle, cartilage, and neural tissue, which may each be influenced by separate selective forces because of their different roles in facilitating movement. …
Habitat Usage Patterns Of Bottlenose Dolphins (Tursiops Truncatus) In Terrebonne And Timbalier Bays, Louisiana, Mary Allison Manning
Habitat Usage Patterns Of Bottlenose Dolphins (Tursiops Truncatus) In Terrebonne And Timbalier Bays, Louisiana, Mary Allison Manning
LSU Master's Theses
I coupled fine-scale environmental data with observed behavior and group composition data to examine overall distribution within the bay system and to characterize the habitat associated with foraging and the presence of calves. Semi-isolated populations of bottlenose dolphins (Tursiops truncatus) along Louisiana’s coast are undergoing increased risks from boat traffic, oil spills, land subsidence, and planned water diversions (CPRA 2017). Characterizing the habitat use of bottlenose dolphins in Terrebonne and Timbalier bays, Louisiana, is important given the likely high site fidelity, small home ranges, and low exchange of individuals with nearby coastal populations (Lane et al. 2015, McDonald …
A New Semidesert Microtityus Kjellesvig-Waering, 1966 (Scorpiones: Buthidae) From Southeast Cuba, Greater Antilles., Rolando Teruel
A New Semidesert Microtityus Kjellesvig-Waering, 1966 (Scorpiones: Buthidae) From Southeast Cuba, Greater Antilles., Rolando Teruel
Euscorpius
A new species of the buthid scorpion genus Microtityus Kjellesvig-Waering, 1966, is herein described from specimens of both sexes collected at three nearby localities in the western part of the Guantánamo Bay Area, southeast Cuba. It belongs in the "jaumei" species-group of the subgenus Microtityus (Parvabsonus) Armas, 1974 and is very peculiar not only by its external morphology (very distinct from its other Cuban congeners), but also by the unusual habitat where it occurs in and seems to be restricted to (dry and hot cactus scrub on volcanic sandy plain). The present contribution reinforces the position of this genus as …
Individual-Level Antibody Dynamics Reveal Potential Drivers Of Influenza A Seasonality In Wild Pig Populations, Kim M. Pepin, Kerri Pedersen, Xiu-Feng Wan, Fred L. Cunningham, Colleen T. Webb, Mark Q. Wilber
Individual-Level Antibody Dynamics Reveal Potential Drivers Of Influenza A Seasonality In Wild Pig Populations, Kim M. Pepin, Kerri Pedersen, Xiu-Feng Wan, Fred L. Cunningham, Colleen T. Webb, Mark Q. Wilber
United States Department of Agriculture Wildlife Services: Staff Publications
Swine are important in the ecology of influenza A virus (IAV) globally. Understanding the ecological role of wild pigs in IAV ecology has been limited because surveillance in wild pigs is often for antibodies (serosurveillance) rather than IAVs, as in humans and domestic swine. As IAV antibodies can persist long after an infection, serosurveillance data are not necessarily indicative of current infection risk. However, antibody responses to IAV infections cause a predictable antibody response, thus time of infection can be inferred from antibody levels in serological samples, enabling identification of risk factors of infection at estimated times of infection. Recent …
Scorpions Of The Horn Of Africa (Arachnida, Scorpiones). Part Xviii. Gint Banfasae Sp. N. From Somaliland (Buthidae), František Kovařík, Graeme Lowe
Scorpions Of The Horn Of Africa (Arachnida, Scorpiones). Part Xviii. Gint Banfasae Sp. N. From Somaliland (Buthidae), František Kovařík, Graeme Lowe
Euscorpius
Gint banfasae sp. n. from Somaliland is described and compared with other species of the genus. Additional information is provided on the taxonomy and distribution of the genus Gint, fully complemented with color photos of specimens of both sexes of the new species, as well as of their habitat. Included is a key for Gint.
Move It Or Lose It: Interspecific Variation In Risk Response Of Pond-Breeding Anurans, Philip Matich, Christopher M. Schalk
Move It Or Lose It: Interspecific Variation In Risk Response Of Pond-Breeding Anurans, Philip Matich, Christopher M. Schalk
Faculty Publications
Changes in behavior are often the proximate response of animals to human disturbance, with variability in tolerance levels leading some species to exhibit striking shifts in life history, fitness, and/or survival. Thus, elucidating the effects of disturbance on animal behavior, and how this varies among taxonomically similar species with inherently different behaviors and life histories is of value for management and conservation. We evaluated the risk response of three anuran species—southern leopard frog (Lithobates sphenocephalus), Blanchard’s cricket frog (Acris blanchardi), and green tree frog (Hyla cinerea)—to determine how differences in microhabitat use (arboreal vs …
Trade-Offs Shape Carotenoid-Based Color Variation In Redheaded Pine Sawfly (Neodiprion Lecontei) Larvae, Maranda Gaines
Trade-Offs Shape Carotenoid-Based Color Variation In Redheaded Pine Sawfly (Neodiprion Lecontei) Larvae, Maranda Gaines
Lewis Honors College Capstone Collection
Carotenoids serve various ecological roles in animals including coloration, immune responses, and vision. Carotenoid-derived coloration is greatly emphasized in the literature, particularly relating to mate choice and aposematic warning. However, the trade-offs between the color and non-color functions of carotenoids are not thoroughly explored. In the redheaded pine sawfly (Neodiprion lecontei), some larval populations have yellow pigmentation, using carotenoids derived from their diets for aposematic warning coloration. Other larval populations are white in color, having genetically lost the ability to produce the yellow pigment. Because carotenoids are essential to life functions in both the yellow and white populations, we aim …
Long-Tailed Weasel (Mustela Frenata) Distribution Survey In Arkansas: Challenges In Detecting A Rare Species, Suzanne D. Johnston, D. Blake Sasse, Robert E. Kissell Jr.
Long-Tailed Weasel (Mustela Frenata) Distribution Survey In Arkansas: Challenges In Detecting A Rare Species, Suzanne D. Johnston, D. Blake Sasse, Robert E. Kissell Jr.
Journal of the Arkansas Academy of Science
Long-tailed weasels (Mustela frenata) have one of the widest distributions of mustelids in the western hemisphere and were distributed across a majority of the American continents ranging from Canada through the contiguous United States, Mexico, and into northern South America. However, on a local scale they are considered uncommon and rare. We assessed the distribution of long-tailed weasels across Arkansas to determine occupancy in each ecoregion of Arkansas, and determined the detectability on two local, adjacent sites. No long-tailed weasels were detected within the ecoregions, but the species was detected with intensive sampling on one local site. It …
Plains Spotted Skunk Pelt Purchase Trends In The Ozarks And Ouachitas, 1943-1990, D. Blake Sasse
Plains Spotted Skunk Pelt Purchase Trends In The Ozarks And Ouachitas, 1943-1990, D. Blake Sasse
Journal of the Arkansas Academy of Science
The Plains spotted skunk (Spilogale putorius interrupta) is a small carnivore that has experienced population declines across much of its range and is currently being considered for listing as an endangered species. I utilized harvest data on pelts from the Ozarks of Missouri and Arkansas and the Ouachita mountains in Arkansas that were purchased by fur dealers from 1943-1990 to examine trends in harvest levels over time. Purchases in all three regions declined in the late 1940s and early 1950s, but purchases in the Arkansas returned to near or at historic levels in the early 1960s and the …
Evaluating Spatial Distributions Of Scent-Marks In Semi-Free-Ranging Groups Of Lemur Catta At The Duke Lemur Center, Shallu Prasher
Evaluating Spatial Distributions Of Scent-Marks In Semi-Free-Ranging Groups Of Lemur Catta At The Duke Lemur Center, Shallu Prasher
Graduate Research Theses & Dissertations
Scent-marking is a widespread form of olfactory signaling exhibited in mammals and for a select group of primates. Although research exists on the process of scent-marking, surface preferences, and for the function of scent-marking in lemurs, analyses of how lemur group scent-marking distributions map onto their home range are lacking. The endangered ring-tailed lemur (Lemur catta) deposits scent-marks using its ano-genital, chest, and wrist glands. This project was designed to collect data on two groups of semi-free-ranging captive ring-tailed lemurs at the Duke Lemur Center to first assess how scent-marks are distributed within their home ranges; and second, to evaluate …
Happy Or Hangry Families: Does Kinship Mediate Cooperation And Cannibalism In Drosophila Melanogaster Larvae?, Lucas Khodaei
Happy Or Hangry Families: Does Kinship Mediate Cooperation And Cannibalism In Drosophila Melanogaster Larvae?, Lucas Khodaei
Theses and Dissertations (Comprehensive)
The fruit fly Drosophila melanogaster has a long history as a research model for studies on behaviour and group dynamics. When individuals are grouped in an environment and resources decrease, then they may behave co-operatively with one another or antagonistically compete. Hamilton’s Law states that if the benefit of helping a related individual out-weighs the cost to its direct fitness, then the individual’s indirect fitness will increase when they help their kin compared to helping an unrelated stranger. Yet it is unknown whether kinship mediates larval behaviour to encourage co-operation and/or lessen antagonistic behaviours between consanguineous individuals. In this thesis …