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Articles 1 - 9 of 9
Full-Text Articles in Other Animal Sciences
Floral Cues And Foraging Preferences In Various Species Of Wild Bumblebees, Olivia A. Dahl
Floral Cues And Foraging Preferences In Various Species Of Wild Bumblebees, Olivia A. Dahl
The International Journal of Ecopsychology (IJE)
There are costs and benefits for plants and their pollinators. Bumblebees play a crucial role in the dynamic plant-pollinator system. Flowers co-evolved with insects, birds, and mammals toward mechanisms that benefited, described from a human perspective, both host and forager. Characteristics such color, olfactory cues, and temperature attract pollinators, with bumblebees showing preferences for blue and yellow flowers, as well as flowers that are warmer. This study aims to answer three questions: 1) How does floral temperature at different times of day predict visit length in bumblebees? 2) Does bumblebee size affect visit length? 3) Is there an interaction between …
The Influence Of Hiking Trails On Salamanders, Emily M. Macdonald
The Influence Of Hiking Trails On Salamanders, Emily M. Macdonald
IdeaFest: Interdisciplinary Journal of Creative Works and Research from Cal Poly Humboldt
Over half of the World’s salamanders are facing extinction. It is important to understand the impact Humans have on them in all parts of their ranges so we can better understand what they need and how we can prevent further extinctions. I conducted this study to try to determine if the human activity on the official hiking trails in the Arcata Community Forest in Arcata California; as designated by the official map of the Forest; is negatively impacting the salamanders that live in the Forest. I thought there would be an increase in the number of species and the overall …
Geographic And Seasonal Variation Of Flying Squirrel Vocalizations In California, Travis A. Farwell
Geographic And Seasonal Variation Of Flying Squirrel Vocalizations In California, Travis A. Farwell
Cal Poly Humboldt theses and projects
Advancements in bioacoustics field studies have further elucidated spatial, temporal, and behavioral aspects of otherwise-cryptic species, as well as offering insights into species communication. The discovery of high-frequency vocalizations in North American flying squirrels in particular has allowed researchers to use ultrasonic acoustic recorders to detect these cryptic species in the wild. Investigations into vocalizations of northern flying squirrels (Glaucomys sabrinus) and southern flying squirrels (G. volans) have highlighted call type variation between species and the potential use of recorders as a tool to examine vocal activity patterns. However, high-frequency vocalizations had yet to be quantitatively …
Escherichia Coli And Salmonella Sp. In Domestic Cattle And Wild Roosevelt Elk: Fecal Pathogens At The Wildlife-Domestic Interface, Emily A. Buck
Escherichia Coli And Salmonella Sp. In Domestic Cattle And Wild Roosevelt Elk: Fecal Pathogens At The Wildlife-Domestic Interface, Emily A. Buck
Cal Poly Humboldt theses and projects
Direct or indirect contact between domestic populations of animals and wildlife carries an inherent risk for transmission of pathogens that cause infectious disease. In Humboldt and Del Norte counties of northern California, ongoing conflict between ranchers and Roosevelt elk groups results from elk use of ranching pastures and pastures on private land. Fecal samples from elk in association with cattle, cattle, and from elk not in known association with cattle were assessed for the presence of bacteria Salmonella enterica and pathogenic Escherichia coli to assess whether association with cattle increases risk of infection for elk. Group identity (one of the …
Data Repository For "North American Porcupine Distribution In The Pacific Northwest And Evaluation Of A Non-Invasive Monitoring Technique", Cara L. Appel, Katie M. Moriarty, Sean M. Matthews, David S. Green, Stacy Anderson, Evan King, J Scott Yaeger, Jeremy Brown, Claire Bortot, Tim Bean
Data Repository For "North American Porcupine Distribution In The Pacific Northwest And Evaluation Of A Non-Invasive Monitoring Technique", Cara L. Appel, Katie M. Moriarty, Sean M. Matthews, David S. Green, Stacy Anderson, Evan King, J Scott Yaeger, Jeremy Brown, Claire Bortot, Tim Bean
Research Data Sets
North American Porcupines (Erethizon dorsatum) have a broad geographic distribution across much of the continent, but recent evidence suggests that their populations may be declining in some areas, including the Pacific Northwest. Estimating baseline historical and contemporary distributions of Porcupines is necessary for initiating monitoring efforts and, if necessary, informing strategic conservation actions. We compiled 1905 occurrence records of Porcupines in Washington, Oregon, and northern California from 1908 to 2018. Using maximum entropy modeling (Maxent), we created historical and contemporary distribution models based on Porcupine records from 1981–2010 and 2012–2018, respectively, to match the temporal scale of available …
Data Repository For "Use Of Redwood Basal Hollows By Bats: A Focus On The Townsend’S Big-Eared Bat On The North Coast Of California", Amon J. Armstrong
Data Repository For "Use Of Redwood Basal Hollows By Bats: A Focus On The Townsend’S Big-Eared Bat On The North Coast Of California", Amon J. Armstrong
Research Data Sets
Loss of roosting resources, either through disturbance or removal, negatively affects bats. Identifying sensitive species and determining roost requirements are critical components in conserving their habitat. Cavity roosting bats on the North Coast of California are known to use hollows in large redwood trees. In this study, we examined the factors determining the use of basal tree hollows by different bat species at eight redwood forest sites in Del Norte, Humboldt, and Mendocino Counties, California. Bat guano was collected from 179 basal hollow roosts from 2017 to 2018, and guano mass was used as an index of roosting activity. Nine …
Tree Squirrels And Fishers In Northern California: The Effects Of Masting Hardwoods On Stand Use, Andria M. Townsend
Tree Squirrels And Fishers In Northern California: The Effects Of Masting Hardwoods On Stand Use, Andria M. Townsend
Cal Poly Humboldt theses and projects
In western North America, tree squirrels such as western gray (Sciurus griseus) and Douglas squirrels (Tamiasciurus douglasii) are potentially important prey for fishers (Pekania pennanti). Western gray squirrels in particular may be highly ranked due to their large body size. Masting trees including black oak (Quercus kelloggii) and tanoak (Notholithocarpus densiflorus) produce an important food source for tree squirrels; therefore, forest stands containing these trees may be useful to foraging fishers. I hypothesized that; 1) the abundance of western gray and Douglas squirrels in a stand is influenced by the …
"Distribution Of The North American Porcupine (Erethizon Dorsatum) In Northern California" Appendix, Cara L. Appel, William J. Zielinski, Frederick V. Schlexer, Richard Callas, Tim Bean
"Distribution Of The North American Porcupine (Erethizon Dorsatum) In Northern California" Appendix, Cara L. Appel, William J. Zielinski, Frederick V. Schlexer, Richard Callas, Tim Bean
Research Data Sets
Western Wildlife 4:17–28, 2017: The North American Porcupine (Erethizon dorsatum) is one of the most widely distributed mammals in North America, but recent reports have suggested declines in parts of its range in the West. In California, we know little about porcupines’ historical or current status; maps of porcupine distribution conflict considerably. Nevertheless, the species is of interest to natural resource managers. For much of the 1900s, foresters and others primarily treated porcupines as pests because of the undesirable damage they inflict by feeding on trees and gnawing on manmade items in search of salt. More recently, porcupines …
The Bee Fauna Of The Horse Mountain And Grouse Mountain Region, Humboldt County, California, Carrie Lopez
The Bee Fauna Of The Horse Mountain And Grouse Mountain Region, Humboldt County, California, Carrie Lopez
Cal Poly Humboldt theses and projects
Recent concerns about the ecological well-being of bee communities in California and elsewhere have increased the need for monitoring programs and studies that evaluate the impact of habitat loss and alteration on bee diversity and abundance. Such studies depend critically on the expertise of people trained in taxonomy, but their numbers have declined in recent years. My primary goal was to gain a comprehensive first-hand experience with bee identification by documenting the fauna of a previously unstudied area in the mountains of northwestern California and by writing an identification key, intended for dedicated non-specialists, to the area’s 35 species of …