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Articles 1 - 17 of 17
Full-Text Articles in Population Biology
A Delicate Balance: The Effects Of Habitat Type On Frog Communities: A Three-Pronged Study Examining The Effects Of Differing Habitat Characteristics On Anuran Diversity At El Centro De Investigación Sumak Kawsay In Situ, Ecuador, Zane Libke
Independent Study Project (ISP) Collection
We conducted 60 hours of visual encounter surveys and 3 hours of calling surveys on 6 different habitat types near Sumak Kawsay in situ Reserva (SKIS) near Mera, Pastaza, Ecuador. We defined habitat types defined by two variables: type of forest and proximity to water. The aim of the study was to determine what effect each variable has on anuran community composition. We compared the effectiveness of the two survey methods as well. High anuran community dissimilarity was found between each habitat type surveyed, indicating that both forest type and proximity to water are important factors that shape species richness …
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 …
Mammals Of The Northern Andes: An Analysis Of Camera Trap Data And Observation In Angochagua, Ecuador, Risa Berman
Mammals Of The Northern Andes: An Analysis Of Camera Trap Data And Observation In Angochagua, Ecuador, Risa Berman
Independent Study Project (ISP) Collection
The high Andes of Ecuador are home to a diverse community of mammals, many of which are threatened. These include the Andean bear, Andean fox, puma, and mountain tapir. This study used camera traps, direct observation, and indirect observation over three weeks to monitor the wildlife in the mountains of the Parroquia of Angochagua. The five species observed during this period were Andean bear, Andean fox, dog, mountain paca, and mouse. While this short study did not completely survey the mammalian community of the area, it confirmed the presence, diet, sociality, temporal habits, elevational range, and habitat preferences of the …
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 …
Development Of A Wild Infant Woolly Monkey Social Interactions, Time Allocation And Behavior Of A Wild Lagothrix Lagotricha Poeppigii Infant And Her Mother, Saba Zewdie
Independent Study Project (ISP) Collection
The lowland woolly monkey (Lagothrix lagotricha poeppigii), like all species of woolly monkey, is extremely threatened due to anthropologic activities such as deforestation, petroleum drilling and commercial hunting across their habitat. Due to their low reproductive rate and low reproductive success in captivity, the captive population is decreasing every year as habitat loss increases. In late February of 2017 an infant female was born on the island of Sumak Allpa, a monkey rehabilitation organization and reserve in the western Ecuadorian Amazon. The woolly monkeys are completely independent on the reserve; and as such her birth marks the first …
What, Where, Why: A Survey Of Felidae Populations At Enashiva Nature Refuge, Tanzania, Lucrecia Aguilar
What, Where, Why: A Survey Of Felidae Populations At Enashiva Nature Refuge, Tanzania, Lucrecia Aguilar
Independent Study Project (ISP) Collection
As felid populations worldwide continue to deteriorate due to human activities, understanding how felid species utilize various landscapes, along with what factors affect such use or disuse, becomes essential to the preservation of these species. While previous research has examined felid populations around the world, many species and locations remain understudied. This study surveyed felid species at Enashiva Nature Refuge (ENR) in the Serengeti-Mara ecosystem to determine (1) what felid species are present at ENR, (2) where these species generally occur, and (3) why felids reside at ENR in low or high numbers. Through the use of opportunistic camera trapping, …
Monitoring Anuran Populations In Bosque Protector Candelaria: A Multi-Year Comparison Of Frog Populations In An Ecuadorian Cloud Forest, Mindee Goodrum
Monitoring Anuran Populations In Bosque Protector Candelaria: A Multi-Year Comparison Of Frog Populations In An Ecuadorian Cloud Forest, Mindee Goodrum
Independent Study Project (ISP) Collection
For many years, amphibian populations around the world have been declining due to climate change, habitat loss or change, and diseases such as Ranavirus or the Chytrid fungus. However, there is still a great lack of information regarding the diversity of frogs, especially in the cloud forests of Ecuador where this study was conducted. This study was conducted in April and May of 2017 in the Ecominga Reserve of Cerro Candelaria in El Placer, Ecuador. The objective was to conduct visual-encounter surveys of several sites in the reserve and compare the results to studies that have been conducted in the …
Harpy Eagle (Harpia Harpyja) Conservation: Juvenile Behavior And Diet At A Nest Near Pijibasal, Darien, Hannah Rodgers
Harpy Eagle (Harpia Harpyja) Conservation: Juvenile Behavior And Diet At A Nest Near Pijibasal, Darien, Hannah Rodgers
Independent Study Project (ISP) Collection
The Harpy Eagle (Harpia harpyja), the largest and most powerful bird of prey in the Americas, is declining throughout its range in Neotropical forests. Hunting and deforestation threaten populations in the most important remaining eagle habitat in Central America, the Darien province of Panama. These eagles may have the longest postfledging juvenile dependency of any raptor, though juvenile behavior during this period is poorly studied. This study monitored an 11-month-old juvenile for 7 days at a nest near the indigenous community of Pijibasal in order to study behavior and diet. Researchers recorded the juvenile’s location and behavior, studied prey remains …
Avifaunal Community Composition In A Tropical Forest Corridor: A Case Study From The Atherton Tableland, North Queensland, Don Jones
Independent Study Project (ISP) Collection
Bird communities in tropical forest ecosystems are highly threatened by habitat loss and fragmentation. Replanted corridors connecting isolated forest remnants are a popular method of ameliorating certain negative impacts of habitat fragmentation. Such linkages can theoretically facilitate greater dispersal, increase gene flow, and reduce the risk of local extinctions in forest birds. However, relatively few studies have examined the utilization of reforested corridors by birds, and little hard data exists to support claims that this type of resource and time intensive project is the best use of often scarce funding for conservation. This study examined the avifaunal community present in …
Fauna Census Of Intertidal Cliffs, Mangapwani, Zanzibar, Emily Jankowski
Fauna Census Of Intertidal Cliffs, Mangapwani, Zanzibar, Emily Jankowski
Independent Study Project (ISP) Collection
Due to their extreme variations in condition over the course of a day, intertidal zones are challenging environments. Organisms that live there must be prepared to cope with both exposure and submersion, not to mention the temperature variations that accompany these conditions. The differing tolerances and adaptations of various organisms to these conditions generally cause patterns of vertical zonation to occur in the intertidal zone, especially when the shore is steep and rocky. Understanding the ecology of shore environments is important to future conservation and management efforts. This study was conducted on a beach in Mangapwani, Zanzibar at at 6˚ …
Marine Animalia Organism Diversity And Reef Condition On Two Reef Sites At Big Creek Beach And Boca Del Drago, Bocas Del Toro, Panamá, Bri Tiffany
Independent Study Project (ISP) Collection
Ocean acidification, climate change, overfishing, and coastal development are endangering coral reefs across the globe. In Bocas del Toro, Panamá, coral reefs are especially threatened by the rapid growth in tourism and the subsequent anthropogenic effects caused by an increased human presence. To evaluate reef condition in this area, a study comparing percent coverage of live and dead coral as well as the diversity of marine Animalia organisms was conducted at one reef site in Big Creek beach and one reef site in Boca del Drago, Isla Colón, Bocas del Toro. It was predicted that dead coral cover would be …
Differences In The Diversity Of Frogspecies Between Sierra Lloronaand El Valle, Panama, Kei Okabe Thurber
Differences In The Diversity Of Frogspecies Between Sierra Lloronaand El Valle, Panama, Kei Okabe Thurber
Independent Study Project (ISP) Collection
Panama is home to the greatest diversity of species in all of Central America. It is home to 174 species of frogs, 35 of which are endemic to Panama. Frogs are a vital part of many ecosystems. They maintain insect populations and act as food sources for larger predators. Their job of maintaining insect populations is essential to curbing the spread of diseases. Additionally, scientists have found chemical compounds in the skin of frogs that can be used to treat pain and prevent infections. The main threat to the majority of frogs is the deadly fungus Batrachochytrium dendrobatidis (Bd), or …
New Study Of Altitude And Butterfly Diversity Evaluation Of Butterfly Diversity In La Hesperia And Influence Of Altitude On Diversity, Savannah Artusi
New Study Of Altitude And Butterfly Diversity Evaluation Of Butterfly Diversity In La Hesperia And Influence Of Altitude On Diversity, Savannah Artusi
Independent Study Project (ISP) Collection
Due to the increasing effects of climate change, studies focusing on bioindicator species are becoming more necessary than ever. Additionally, knowledge about global biodiversity can be very useful to conservation organizations because it helps them determine what areas need to be conserved the most .Butterflies are useful as bioindicators due to their complex life cycles, importance in the food chain, and sensitivity to environmental changes. This project focused on studying the overall biodiversity of butterflies in the La Hesperia reserve. In addition, this study aimed to determine how butterfly diversity varies at different altitudes. To do this, the reserve was …
New Observations Of The Andean Ibis (Theristicus Branickii, Threskiornithidae): Distribution, Movements, And Behavior Near Volcán Antisana, Benjamin West
Independent Study Project (ISP) Collection
The Andean Ibis (Theristicus branickii) of the highland grasslands of Ecuador, Peru, and Bolivia is listed globally as Near Threatened and Critically Endangered in Ecuador. The Ecuadorian population is estimated at 100 individuals and is restricted to the vicinities of Volcán Antisana and Volcán Cotopaxi. Knowledge of the nesting biology of the Andean Ibis in Ecuador consists of a single filming in 1989. Much of its general ecology and movements is also unknown. The purpose of this study was to find evidence of nesting ibis in Ecuador while also collecting data on behavior, population, movements and interspecific interactions. Data was …
Who Else Would Plant The Trees? A Status Update On The Pemba Flying Fox, Hannah “Hawa” Grose, Catherine Grace “Rahma” Clemmens
Who Else Would Plant The Trees? A Status Update On The Pemba Flying Fox, Hannah “Hawa” Grose, Catherine Grace “Rahma” Clemmens
Independent Study Project (ISP) Collection
This study assesses the current population of Pemba Flying Fox, Pteropusvoeltzkowi, at four key locations on Pemba Island off the coast of Tanzania previously noted as highly populated roost sites: Ngezi National Forest, Wete, Kidike, and MsituwaMbiji. We evaluate local knowledge, perceptions, and practices of communities surrounding the Pemba Flying Fox. This study also documents roosting and migratory patterns of the bats. We hypothesize a growth in bat population, an overall positive community perception of the bats, and a greater amount of conflict between fruit farmers and Pteropusvoeltzkowi. Results showed a decrease in estimated population. Additionally, reverse correlation was found …
Landscape Factors Impacting Survival Of Sympatric Red-Necked Wallabies (Macropus Rufogriseus) And Swamp Wallabies (Wallabia Bicolor) In Urbanized Areas, Karen Zusi
Independent Study Project (ISP) Collection
Urbanization and infrastructure build-up often includes many processes that can damage the natural environment in surrounding areas. Road, powerline, and dam construction, as well as mining, drilling, and overall land-clearing, have severe impacts that resonate through the adjacent wildlife communities. Some species, however, are able to persist in the fringes of urban environments; the swamp wallaby, Wallabia bicolor, is one such example in Australia. A different species of macropod, the red-necked wallaby (Macropus rufogriseus), is similar to the swamp wallaby in many ways but has failed to persist in the outskirts of urban areas. This study aimed to quantitatively differentiate …
The Effect Of Human Predation, Rats And Goats On Small Colonies Of Wedge-Tailed Shearwaters (Puffinus Pacificus) In Southwest Madagascar, Alexis P. Will
The Effect Of Human Predation, Rats And Goats On Small Colonies Of Wedge-Tailed Shearwaters (Puffinus Pacificus) In Southwest Madagascar, Alexis P. Will
Independent Study Project (ISP) Collection
Three islands: Betsiboko, Jamanjaky Be and Jamanjaky Roa, off the coast of Morombe in Southwest Madagascar were visited in November 2005 to verify the existence and evaluate the health of wedge-tailed shearwater (Puffinus pacificus) colonies that were described by Otto Appert in the 1960’s (Hawkins (a) 2005; Hawkins (b) 2005). These three islands experience varying degrees of human use, ranging from low: light human predation on shearwater chicks, to high: the presence of domestic animals, collecting fuelwood on the island and more intensive harvesting of chicks. Interviews were conducted with the local Vezo (fishing) people to quantify the human predation …