Search
Search Results
-
African Americans are disproportionately more likely than older whites to develop Alzheimer’s disease and other dementias (ADOD). Despite these disparities, there is difficulty in motivating African Americans ...
Citation Citation
- Title:
- Using Cultural Relevancy to Promote African American Brain Health
- Author:
- Walker, Miya
- Year:
- 2017
African Americans are disproportionately more likely than older whites to develop Alzheimer’s disease and other dementias (ADOD). Despite these disparities, there is difficulty in motivating African Americans to engage in activities suitable to maintaining cognitive health (walking, social engagement, physical activity). The Sharing History through Active Reminiscence and Photo-imagery (SHARP) walking program (Croff, PI) combines these proactive activities in a culturally relevant way to create a motivational force to preserve cognitive health. SHARP engaged 19 African Americans aged 55 and older on 72 themed, 1-mile walks over 6 months in Portland, Oregon’s historically Black neighborhoods. This study examines participant responses to the SHARP walk “Afrocentrism” to illustrate how culture can be used to motivate walking and social engagement among older African Americans. The “Afrocentrism” walk presents three questions with historic neighborhood images, each approximately 10 minutes apart along the route: What are your memories of Afrocentric art? What did it mean to you and your community? Did you, your friends or family show your Afrocentrism in the 1960's, 70's and 80's? How? What did it mean to you? Do you have any memories about this [African clothing] shop? How were expressions of Afrocentrism accepted in the 1960's and 70's in Portland? Participant narratives were audio recorded. Narratives were then coded for common themes that gave insight to the importance of culture in health programming. Specific conversations amongst walking groups varied around the “Afrocentrism” prompts, however, walking groups reminisced over the same prominent people and places in the community. The commonality of participants shared neighborhood experiences creates a collective historical narrative and allows for connection to one another in ways that support connection to the neighborhood and to African American culture. This collective narrative informs researchers and allows for a deeper understanding of the Black experience, thus further facilitating the incorporation of culturally relevant prompts into the program. This is an essential way SHARP motivates participants to exercise and engage socially. Incorporating culture into health programs, as SHARP does, can be transferable to other health promotion programs to sustain retention and engagement.
-
352. [Article] Honeywell Lyric WiFi Water Leak and Freeze Detector
We are pleased to present the strategic marketing plan for the Lyric WiFi Water Leak and Freeze Detector, manufactured by Honeywell, Inc. Honeywell is a $38.6B global company that provides value-added ...Citation Citation
- Title:
- Honeywell Lyric WiFi Water Leak and Freeze Detector
- Author:
- Chabuel, Cyrille, Davis, Chris, Penumarti, Anjana, Tripathy, Sudipta, VanDerSchaaf, Hans
- Year:
- 2016
We are pleased to present the strategic marketing plan for the Lyric WiFi Water Leak and Freeze Detector, manufactured by Honeywell, Inc. Honeywell is a $38.6B global company that provides value-added products and market changing innovations. Our extensive intellectual property portfolio generates competitive advantages for us and our customers. Our key product groups include Aerospace, Automation & Control Solutions (where the Lyric family resides; ACS) and Performance Materials and Technologies. Honeywell is well positioned for supporting the introduction and growth of the Leak Detector, with $40B in annual company sales, and a 50% increase in earnings per share over the past five years. The Leak Detector is an early warning system that notifies customers on their connected devices when a leak is detected or the temperature drops below a temperature of their choice. By catching a leak early, customers can avoid expensive repairs and disruptions to their lives. We are realistically optimistic about the revenue and profit potential of the Leak Detector. It sits in the Internet of Things (IoT) market, which is projected to grow at a compound annual rate of 67% over the next 5 years to a whopping $792.34 billion. In 2016 connected home device sales within this market will be approximately $61 billion. Our target market (Service Obtainable Market) consists of homeowners under the age of 40 who live in houses with WiFI, have hard to reach places in their primary or secondary homes, are motivated to prevent water leaks (largely based on past experiences with leaks), have recently acquired houses or are renovating their existing houses, and have an affinity for relatively new technology. We estimate by the end of year 3, we can capture 50% of this market and sell 4.5M Leak Detector units annually, generating $320M in total annual sales and annual profits of $63M. We are also optimistic because the Leak Detector is a strong competitor, due to the strength of the Lyric and Honeywell brands, and its wifi capabilities. In the next three years, we will cross the chasm from early adopters to the early majority by enhancing the development of our product (e.g. connecting better to an ecosystem), innovating in our manufacturing to reduce the unit price, and by distributing through the right channels (directly to customers, popular online retailers, home improvement retailers, and influencers, such as insurance companies, plumbers and major appliance retailers).
-
353. [Article] Defining the Terroir of the Columbia Gorge Wine Region, Oregon and Washington, USA Using Geographic Information Systems (GIS)
The Columbia Gorge Wine Region (CGWR) is an emerging wine producing area that extends for about 100km along the Columbia River in Oregon and Washington State in which the number of vineyards, wineries ...Citation Citation
- Title:
- Defining the Terroir of the Columbia Gorge Wine Region, Oregon and Washington, USA Using Geographic Information Systems (GIS)
- Author:
- Whitney, Hilary
- Year:
- 2015
The Columbia Gorge Wine Region (CGWR) is an emerging wine producing area that extends for about 100km along the Columbia River in Oregon and Washington State in which the number of vineyards, wineries and physical terroir conditions have yet to be defined. To better understand the physical factors affecting Oregon and Washington wine, this project analyzes climate, topography, geology and soil at vineyards in the CGWR. This was accomplished using Geographic Information Systems, existing earth science databases and field work. The region, which includes the Columbia Gorge American Viticulture Area (AVA) and the southwest portion of the Columbia Valley AVA, is home to 82 vineyards, 513 hectares (1268 acres), 37 wineries and 41 different varieties of Vitus Vinifera. Vineyards range in elevation from 29 to 548 meters (95 to 1799 feet). Vintner responses to a grower's survey suggest that twenty-eight grape varieties account for 98% of the estimated grape variety acreage, with Pinot Noir being the most widely planted grape variety in both AVAs. The boundaries of each climatic regime were mapped based on 1981-2010 PRISM data, the Winkler Index (Amerine and Winkler, 1944) updated by Jones et al. (2010) and climatic maturity groupings designed for Oregon (Jones et al., 2002; Jones et al., 2010). Three Winkler climate regimes are represented within the CGWR, including regions Ia, Ib, and II from the Winkler Index (Jones et al., 2010). The diversity in regimes allows for a diversity of grape varieties to be planted within the regime. The average growing season temperatures and growing degree days, respectively, from 1981-2010 calculated for vineyards ranges from 13.7°C (55.7°F) to 17.7°C (63.9°F) and 871 for °C (1567 for °F) to 1664 for °C (2994 for °F) respectively. 58% of the vineyards are characterized in an intermediate climatic regime, 29% are within a cool climatic regime, 9% are within a warm climatic regime and 4% are on the boundaries between a cool, intermediate or warm regime. 80% of the vineyards are within Regions Ia and Ib characterized by the Winkler Index, and 20% are within Region II. The growing degrees days calculated for the CGWR are similar those measured in the Willamette Valley, Oregon, Burgundy, France, Umpqua Valley AVA in Oregon and Bordeaux wine region in France. All of the soils currently being used to grow grapes are well-drained and within a xeric moisture regime, which are favorable conditions for viticulture. 30 soil series are represented among the vineyard sites, with the Chemawa Series (Underwood Mountain) and Walla Walla Series (eastern portions) being the dominant soil series used to grow grapes. Majority of the soils contain a silt loam texture. Soil Survey data for Oregon and Washington suggest that loess is extensive in the CGWR, with 46.5% of the total vineyard acreage planted on soils formed in loess. The Missoula Floods also greatly influenced the texture and age of the soil in this region, with skeletal textures being close to the Columbia River. Other common geological deposits at vineyards in the CGWR include, Quaternary Basalt (19.6%), Missoula Flood deposits (9.1%), The Dalles Formation (8.0%), Columbia River Basalt Group (7.5%), Pliocene Basalt (3.0%), Quaternary Surficial deposits (3.0%), lahars (2.3%) and Quaternary Basaltic Andesite and Andesite (0.9%). Common geological deposits, soil series, and climate conditions at vineyard sites vary spatially in the region, and therefore it is suggested that future work focus on separating the region into separate climatic sub-AVA regimes to better reflect the diversity in terroir conditions.
-
354. [Article] Localized Ecological and Educational Effects of Environmental Service-Learning in Portland, Oregon
Environmental service-learning is an intentional educational experience(s) wherein learners engage in meaningful activities designed to serve the environment. Environmental service-learning activities ...Citation Citation
- Title:
- Localized Ecological and Educational Effects of Environmental Service-Learning in Portland, Oregon
- Author:
- Braun, Steven Matthew
- Year:
- 2015
Environmental service-learning is an intentional educational experience(s) wherein learners engage in meaningful activities designed to serve the environment. Environmental service-learning activities vary according to their learning and service goals and include ecomanagement, persuasion, legal action, economic action and political action. The purpose of this mixed methods research was to explore the ecological and educational impacts of grades 6-12 environmental education, with special attention to environmental service-learning throughout Portland, Oregon. Ecological impacts considered restoration and conservation outcomes of several environmental service-learning programs including plant communities, soils, litter removal and trail maintenance. Educational outcomes considered aspects of environmental literacy including locus of control, environmental sensitivity, indicated environmentally responsible behaviors, investigating environmental issues and knowledge of physical systems. The relative influence of some significant life experiences on youths' response to environmental education, including environmental service-learning, was also considered. Telephone surveys were used to gather data from 22 Portland metropolitan area environmental education programs. Data included 2014 annual biophysical impacts (e.g., area of invasive species removed, pounds of litter removed) and information on programming (e.g., length of program, % time outside). Eleven programs administered a 33-question environmental literacy assessment to participants of their programs (n=393). The assessment included the New Environmental Paradigm, the Inclusion of Nature in Self, questions from Environmental Identity Scale and self-constructed questions. One 8th grade program was identified for a detailed case study. In this 8th grade programs, slight variations in educational activities occurred among three treatment groups which varied the amount of time youth spent engaged in ecomanagement. Youth from the three treatment groups and a control group were administered the environmental literacy assessment at the beginning and end of the program. Qualitative data for the youth in the treatment groups were gathered to further consider how environmental literacy was impacted by participation in the program. Stronger associational correlations to environmental literacy occurred for the percentage of time an environmental education program spent outdoors rather than the percentage of time an environmental education program engaged in environmental service-learning (e.g., "With other people, I can work to make a positive impact on the environment." rho: .276 vs. "I have the skills necessary to make a positive impact on the environment" rho: .176). Random forests indicated that environmental education program features and some significant life experiences could predict collapsed environmental literacy variables (locus of control, environmental sensitivity and environmentally responsible behaviors). 22.4% of the variance in a collapsed environmental sensitivity variable was explained by nine predictor variables; those variables with the strongest influence were youth response to "Before this program, how frequently did you spend time in the outdoors," age and the presence of a positive adult role model who cares for the environment. Youth participating in environmental education programs showed higher environmental literacy than control groups (e.g., "I feel an important part of my life would be missing if I couldn't get out and enjoy nature from time to time" U: 3642.500, p: 0.025). Youth with significant formative life experiences (e.g., those indicating previous environmental education or a positive adult role model that cares for the environment) responded better (higher environmental literacy) to environmental education than those youth without ("I pay special attention to things outdoors" chi 10.633, p: 0.031). This research provides insight on the efficacy of environmental service-learning. Environmental service-learning positively affected environmental literacy, but outdoor environmental education was more effective in terms of environmental literacy. Results corroborate the body of literature regarding significant life experiences. Further, results suggest that significant life experiences are a critical development milestone necessary for youth to respond to environmental education on a developmental trajectory to empowered environmentally literate citizens.
-
355. [Article] Multnomah County Project Launch Evaluation
Early childhood is a critical time in human development. Any experience, positive or negative, can influence long-term outcomes for physical, emotional, social, and cognitive health (Center on the Developing ...Citation Citation
- Title:
- Multnomah County Project Launch Evaluation
- Author:
- Auerbach, Jessica, Emlen, Elana S., Garcia, Danielle C., Hause, Noelle, Lambarth, Callie H., Lorentson, Mhora, Rife, Isabel M., Zavela, Kathleen J., Aratani, Yumiko, Bracey, Jeana R., Ekono, Mercedes, Green, Beth L., Kryah, Rachel, Mendez, Melissa, Smith, Sheila, Tom, Lily
- Year:
- 2016
Early childhood is a critical time in human development. Any experience, positive or negative, can influence long-term outcomes for physical, emotional, social, and cognitive health (Center on the Developing Child at Harvard University, 2010). To ensure a strong foundation for success in school and in life, efforts designed to promote wellness and identify early learning or mental health challenges must begin well before kindergarten. Strong evidence shows that investing in early childhood can yield large dividends for children. Additionally, the ability of our systems to provide positive outcomes for children can be enhanced through strategic planning, well-developed partnerships, and coordinated family services. Project LAUNCH (Linking Actions for Unmet Needs in Children’s Health), a federally funded United States Department of Health and Human Services, Substance Abuse and Mental Health Services Administration (SAMHSA) initiative, aims to enhance and improve the way systems function by bringing together all participants in each child’s life including caregivers, primary care providers, early childhood educators, and mental health providers. Project LAUNCH strives to incorporate all participants, at all levels of service provision, to strengthen our ability to achieve the best possible outcomes in social and emotional health and wellness for all children. Project LAUNCH has funded states, local jurisdictions, and tribes interested in achieving these goals since 2008. Under Project LAUNCH, grantees are charged with (1) promoting the healthy development of children from birth to age 8 and their families by harnessing and coordinating existing resources and (2) increasing access to high-quality, evidence-based programs in five childcentric domains: developmental screening and assessment, home visiting, mental health consultation, family strengthening and training, and integration of behavioral health into primary care. By developing an understanding of the landscape of services and supports unique to each state and community and by evaluating strengths and opportunities for change, grantees begin to implement promotion and prevention strategies that best serve the needs of their communities at the child, family, and systems levels. Thus, while there are distinct cultural, geographic, and economic differences across LAUNCH sites in all cohorts, the fundamental components of the LAUNCH model remain the same for all grantees. To date, Project LAUNCH has funded 55 projects across six cohorts. All LAUNCH grantees are expected to demonstrate local policy and practice improvements that can be sustained statewide. Unlike other LAUNCH cohorts, Cohort 3 grantees are distinguished by the fact that they were funded solely at the community level with no state or tribal oversight. This presented the six sites with a unique set of opportunities and challenges as they sought to bring policy and practice improvements to scale, enhance infrastructure, and implement direct services in the five domains or strategies. The uniqueness of the community-based aspect of Cohort 3 grantees provided both challenges and opportunities. Grantees identified the flexibility and ability to control program activities within a community setting as key advantages to the local grants, whereas the ability to replicate successful activities and implement policy change on a statewide basis were limited. Additionally, the uniqueness of Cohort 3 made it challenging to evaluate the success of Cohort 3 grantees by measuring their progress against that of other cohorts. This e-book was developed to highlight and share the experience of the local communities in Cohort 3. This publication is designed to serve as a resource for future early childhood systems development activities implemented by LAUNCH grantees or by other early childhood programs with similar goals and interests. This publication shares the contributions of this unique cohort to the field of young children’s mental health and family wellness by spotlighting accomplishments, evidence, and lessons learned within the context of the LAUNCH strategic framework. Narratives from the six grantees detail the successes and challenges of systems building from the ground up and emphasize the value-added benefits of funding directly at the community level. Recommendations for present and future LAUNCH projects and similar initiatives address strategies to build local, state, and national partnerships to support replication and sustainability. We hope you will find this resource of value for supporting local initiatives that promote young child and family wellness
-
Investment in Research and Development (R&D) is necessary for innovation, allowing an organization to maintain a competitive edge. The U.S. Federal Government invests billions of dollars, primarily in ...
Citation Citation
- Title:
- Development of a Technology Transfer Score for Evaluating Research Proposals: Case Study of Demand Response Technologies in the Pacific Northwest
- Author:
- Estep, Judith
- Year:
- 2017
Investment in Research and Development (R&D) is necessary for innovation, allowing an organization to maintain a competitive edge. The U.S. Federal Government invests billions of dollars, primarily in basic research technologies to help fill the pipeline for other organizations to take the technology into commercialization. However, it is not about just investing in innovation, it is about converting that research into application. A cursory review of the research proposal evaluation criteria suggests that there is little to no emphasis placed on the transfer of research results. This effort is motivated by a need to move research into application. One segment that is facing technology challenges is the energy sector. Historically, the electric grid has been stable and predictable; therefore, there were no immediate drivers to innovate. However, an aging infrastructure, integration of renewable energy, and aggressive energy efficiency targets are motivating the need for research and to put promising results into application. Many technologies exist or are in development but the rate at which they are being adopted is slow. The goal of this research is to develop a decision model that can be used to identify the technology transfer potential of a research proposal. An organization can use the model to select the proposals whose research outcomes are more likely to move into application. The model begins to close the chasm between research and application -- otherwise known as the "valley of death." A comprehensive literature review was conducted to understand when the idea of technology application or transfer should begin. Next, the attributes that are necessary for successful technology transfer were identified. The emphasis of successful technology transfer occurs when there is a productive relationship between the researchers and the technology recipient. A hierarchical decision model, along with desirability curves, was used to understand the complexities of the researcher and recipient relationship, specific to technology transfer. In this research, the evaluation criteria of several research organizations were assessed to understand the extent to which the success attributes that were identified in literature were considered when reviewing research proposals. While some of the organizations included a few of the success attributes, none of the organizations considered all of the attributes. In addition, none of the organizations quantified the value of the success attributes. The effectiveness of the model relies extensively on expert judgments to complete the model validation and quantification. Subject matter experts ranging from senior executives with extensive experience in technology transfer to principal research investigators from national labs, universities, utilities, and non-profit research organizations were used to ensure a comprehensive and cross-functional validation and quantification of the decision model. The quantified model was validated using a case study involving demand response (DR) technology proposals in the Pacific Northwest. The DR technologies were selected based on their potential to solve some of the region's most prevalent issues. In addition, several sensitivity scenarios were developed to test the model's response to extreme case scenarios, impact of perturbations in expert responses, and if it can be applied to other than demand response technologies. In other words, is the model technology agnostic? In addition, the flexibility of the model to be used as a tool for communicating which success attributes in a research proposal are deficient and need strengthening and how improvements would increase the overall technology transfer score were assessed. The low scoring success attributes in the case study proposals (e.g. project meetings, etc.) were clearly identified as the areas to be improved for increasing the technology transfer score. As a communication tool, the model could help a research organization identify areas they could bolster to improve their overall technology transfer score. Similarly, the technology recipient could use the results to identify areas that need to be reinforced, as the research is ongoing. The research objective is to develop a decision model resulting in a technology transfer score that can be used to assess the technology transfer potential of a research proposal. The technology transfer score can be used by an organization in the development of a research portfolio. An organization's growth, in a highly competitive global market, hinges on superior R&D performance and the ability to apply the results. The energy sector is no different. While there is sufficient research being done to address the issues facing the utility industry, the rate at which technologies are adopted is lagging. The technology transfer score has the potential to increase the success of crossing the chasm to successful application by helping an organization make informed and deliberate decisions about their research portfolio.
-
357. [Article] The Biology of Eastern Kingbirds at Malheur National Wildlife Refuge: Survival, Reproduction, and Testosterone Secretion
This dissertation presents the results of a study that I undertook to better understand the breeding biology of Eastern Kingbirds (hereafter, kingbirds) at Malheur National Wildlife Refuge in southeastern ...Citation Citation
- Title:
- The Biology of Eastern Kingbirds at Malheur National Wildlife Refuge: Survival, Reproduction, and Testosterone Secretion
- Author:
- Redmond, Lucas J.
- Year:
- 2015
This dissertation presents the results of a study that I undertook to better understand the breeding biology of Eastern Kingbirds (hereafter, kingbirds) at Malheur National Wildlife Refuge in southeastern Oregon from 2003 to 2009. Kingbirds are long-distance migratory songbirds that breed across much of North America. This species is socially monogamous but, via frequent extra-pair copulations, is genetically polygamous. Kingbirds exhibit relatively high breeding site fidelity, often returning to the same tree to nest in subsequent years. Both members of a pair provide parental care, but there are often specific duties performed by both male and female kingbirds. For example, males typically perform much of the vigilant nest defense that this species is well known for and contribute, to an extent, to the feeding of nestlings. Females, on the other hand, are entirely responsible for incubating and brooding. Beginning in 2002, most adults within the population of kingbirds at Malheur had been banded with a unique combination of three colored plastic leg bands and an aluminum USFWS band. Also, as many nests were located in each year as possible, and any young that survived to fledging age were banded with a unique combination of leg bands. Considerable effort was then spent each year to locate as many banded individuals as possible, which allowed me to document adult and juvenile survival. Annual survival rates of adult male and female kingbirds in the population at Malheur did not differ and were relatively high at approximately 0.65. Juvenile survival rate was approximately 0.29, indicating that slightly less than one-third of nestlings survive the interval between fledging and their first potential breeding season. Resighting probability was high for both sexes, although higher for adult males (0.94) than for adult female (0.84). The latter finding is consistent with the higher site fidelity of males than of females. Resighting probabilities for juveniles were much lower at 0.68 and 0.40 for males and females, respectively. Again, this was expected because natal site fidelity is typically much lower than breeding site fidelity. Compared to most other reports, resighting probability and return rates of juvenile kingbirds was high, presumably because the riparian habitats where kingbirds breed at Malheur function as an ecological island surrounded by, for kingbirds, unsuitable high desert habitat. Thus, unless they disperse very long distances, the only option for juvenile kingbirds is to begin nesting on the refuge. The collection of blood samples from birds has become an increasingly common practice in ornithology. The data that can be gained from these samples allow a number of interesting questions to be asked such as understanding the genetic mating system of a species, patterns of hormone secretion, and discerning migratory pathways via stable isotope analysis. The volume of blood collected is usually small and was assumed to cause no long-term negative effects on sampled individuals. However, few studies have rigorously examined the effect of blood sampling on survival. I used a multistate mark-recapture analysis to assess the effect blood sampling on annual survival of kingbirds by combining the annual survival data described above with whether or not individuals were subjected to blood sample collection. The results of this analysis indicated that blood sampling had no effect on annual survival rates of kingbirds. Whether or not this is the case for other species remains to be seen. However, my results support the assumption that when done correctly, blood sampling has little to no long-term negative effects on birds. Comparative analyses of many bird species show that testosterone secretion exhibits fairly predictable patterns among breeding birds of different mating systems. Monogamous species reach a peak during mate attraction and the period of female fertility which is then followed by a sharp decline when young are in the nest. By contrast, males of polygynous species tend to maintain higher levels of testosterone throughout the breeding season to, presumably, maximize opportunities for acquiring additional mates. Kingbirds are socially monogamous but cryptically polygamous. However, because of high rates of extra-pair paternity, variation in reproductive success among males is much higher than what is expected for a monogamous species, and, instead, is similar to what has been reported for polygynous species. Therefore from 2005 to 2009 I measured testosterone concentrations from the blood samples collected from male kingbirds to determine the breeding season profile of testosterone secretion in kingbirds and to understand the factors that influence testosterone variation among individuals. Contrary to expected for a monogamous species, the testosterone profile of kingbirds did not exhibit the brief peak in testosterone followed by a precipitous decline. Testosterone peaked early in the season, but declined very slowly as the nest cycle progressed. I attributed this gradual decline in testosterone to the cryptically polygynous nature of the kingbird extra-pair mating system. I also found substantial variation in testosterone concentration among male kingbirds and was able to identify several factors contributing to this variation. As expected, testosterone declined as the breeding season progressed (independent of stage in nest cycle) and nest density increased, while increases in testosterone were correlated with the number of fertile females within the population. This suggests that male kingbirds were capable of modulating testosterone concentrations to both cope with an increase in conspecific density, but also to ready themselves for times when extra-pair copulations were more likely.
-
African savanna elephants (Loxodonta africana) and Asian elephants (Elephas maximus) are a focus of welfare research in zoos due to their high intelligence, complex social structure, and sheer size. Due ...
Citation Citation
- Title:
- Applying GPS and Accelerometers to the Study of African Savanna (Loxodonta africana) and Asian Elephant (Elephas maximus) Welfare in Zoos
- Author:
- Holdgate, Matthew Robert
- Year:
- 2015
African savanna elephants (Loxodonta africana) and Asian elephants (Elephas maximus) are a focus of welfare research in zoos due to their high intelligence, complex social structure, and sheer size. Due to these challenges, some argue that zoos are inherently incapable of providing appropriate care for elephants, while others believe that zoos can fulfill the needs of these species with improved husbandry. There is a general consensus from both within and outside of zoos, however, that zoos must improve their elephant programs or cease exhibiting these animals altogether. Now more than ever, applied research on zoo elephant welfare is needed to provide context for this debate. Researchers are interested in how far zoo elephants walk due to the potential health and welfare benefits of walking in these highly mobile species. Zoo researchers recently adopted GPS technology to study elephant walking, and preliminary evidence suggests that African elephants in large zoo exhibits walk distances that correspond with wild elephants under non-extreme conditions. However, data are limited from Asian elephants and from elephants in more typically-sized exhibits. In Chapter Two, I discuss important methodological considerations of utilizing GPS in a zoo environment, including an introduction to the technology, sources of error and mitigation, methods to improve GPS performance, and possible effects of GPS device attachment on animal behavior. This review shows GPS performance is adequate for tracking zoo elephant walking when proper methodological techniques are applied, and should serve as a useful reference for zoo researchers considering using GPS. In Chapter Three, I used GPS anklets to measure outdoor daily walking distance in 56 adult female African (n = 33) and Asian (n = 23) elephants housed in 30 zoos. I collected 259 days of data and found that elephants walked an average of 5.34 km/day with no significant difference between species. Multivariate regression models predicted that elephants with more dynamic feeding regimens (more diverse feeding types and frequencies; unscheduled feeding times) will walk more. Distance walked was also predicted to be higher in elephants that spend time in a greater number of different social groups. Distance walked was predicted to decline with age. Finally, I found a significant negative correlation between distance walked and nighttime space experience. The results of the analysis suggest that zoos that want to increase walking in their elephants need not rely solely on larger exhibits, but can increase walking by adding quality and complexity to exhibits. However, my results failed to establish a definitive link between walking distance and other validated measures of elephant welfare. Thus, the direct health and welfare benefits of walking in zoo elephants remain unresolved. Resting behaviors are an essential component of animal welfare, but have received little attention in zoological research. In Chapter Four, I used accelerometers in anklets to complete the first large-scale multi-species investigation of zoo elephant recumbence. I collected 344 days of data from 72 adult female African (n = 44) and Asian (n = 28) elephants at 40 zoos. I found that African elephants are recumbent an average of 2.14 hours/day, which is significantly less than Asian elephants at 3.22 hours/day. Multivariate regression models predicted that African elephant recumbence increases when they experience more space at night, and Asian elephant recumbence increases when they spend time housed alone. Both species showed a similar response to substrate, such that African elephants spending time on all-hard substrates are predicted to be recumbent less, while Asian elephants spending time on all-soft substrates are predicted to be recumbent more. The discovery that occasional non-recumbence is a common behavior in zoo elephants also introduces a new area of research that may have important animal welfare consequences. Finally, this study established that zoos should continue their efforts to replace hard substrate with soft substrate in order to provide zoo elephants with environments that facilitate recumbence. Overall, this work assessed walking and recumbence in zoo elephants, which will allow zoos to gauge the prevalence of these behaviors in their elephants as compared to the sub-population studied here. A variety of factors that are associated with these behaviors were also identified. With this information, zoos can prioritize modifications to their facilities and animal management programs to create an environment that encourages zoo elephants to express walking and recumbence behavior, should they choose to do so. This work is one component of the Elephant Welfare Project, the largest zoo animal welfare project ever undertaken, and is unprecedented in both scope and scale. The project was funded by the Institute of Museum and Library Services (IMLS), an independent, U.S., federal, grant-making agency that supports libraries, museums, and zoos. At the time of this writing, the first manuscripts from this project are being submitted to academic journals. These papers will describe the prevalence and distribution of a variety of elephant behaviors and welfare indicators, serve as a benchmark for future elephant welfare studies, and aid in decision making with regard to best practices in elephant management.
-
359. [Article] Responses of Aquatic Non-Native Species to Novel Predator Cues and Increased Mortality
Lethal biotic interactions strongly influence the potential for aquatic non-native species to establish and endure in habitats to which they are introduced. Predators in the recipient area, including native ...Citation Citation
- Title:
- Responses of Aquatic Non-Native Species to Novel Predator Cues and Increased Mortality
- Author:
- Turner, Brian Christopher
- Year:
- 2017
Lethal biotic interactions strongly influence the potential for aquatic non-native species to establish and endure in habitats to which they are introduced. Predators in the recipient area, including native and previously established non-native predators, can prevent establishment, limit habitat use, and reduce abundance of non-native species. Management efforts by humans using methods designed to cause mass mortality (e.g., trapping, biocide applications) can reduce or eradicate non-native populations. However, the impacts of predator and human induced mortality may be mitigated by the behavior or population-level responses of a given non-native species. My dissertation examined the responses of non-native aquatic species to the risk of predation by novel (i.e., no previous exposure) predators in the recipient community and indicators of potential compensatory responses by non-native populations to increased mortality resulting from removal efforts. My dissertation addresses four primary questions. 1) Can first generation, naïve invaders recognize and defend against predators found within the region of invasion through the expression of inducible defenses? 2) Can the overcompensatory potential of a population be predicted though examinations of intraspecific interactions of individuals from the population? 3) What is the relationship between removal effort outcome (i.e., successful or unsuccessful reduction of the target population) and compensatory population responses? 4) Is there a relationship between characteristics of removal efforts that are typically available to managers (e.g., target area size, target area connectivity, removal methodology) and compensatory population responses that could indicate the relative likelihood of compensation resulting from removal efforts? An invading species should be more likely to establish if it can successfully identify and defend against predators in the recipient range, such as through the expression of inducible defenses. Inducible defenses are behavioral or physiological changes that reduce an organism's susceptibility to predation. Through a series of laboratory experiments, I tested whether inducible defenses, in the form of increased burrowing depth, may have benefited the early stage of invasion of Nuttallia obscurata (purple varnish clam), an established Northeast Pacific invader. Specimens of N. obscurata were collected from introduced populations in the Northeast Pacific and from a native population in Japan. The clams were exposed to chemical and physical cues from Northeast Pacific crab predators, including the native Metacarcinus magister (Dungeness crab), an abundant and frequent predator of N. obscurata. While introduced N. obscurata increased their burrowing depth in the physical presence of M. magister, clams collected from their native range showed no such response. This lack of increased burrowing depth by naïve clams in response to a predator native to the newly invaded range, but a significant increase in depth for clams from populations established in the range suggests that while inducible defenses likely did not contribute to the initial establishment of N. obscurata in the Northeast Pacific, they may contribute to their continued persistence and expansion in their introduced range. Some efforts to reduce invasive populations have paradoxically led to population increases. This phenomenon, referred to as overcompensation, occurs when strong negative density-dependent interactions are reduced through increased mortality within a population, resulting in an increase in the population's recruitment rate sufficient to increase the population's overall abundance. Increases in a population's recruitment rate can result from reduced cannibalism of juveniles resulting in lower mortality of new recruits, from increased adult reproductive output, which increases the number of potential recruits, or from reductions in size and/or age at maturity of the unharvested population, which increases the number of reproductive individuals. I predicted the overcompensatory potential of a population of Carcinus maenas (European green crab) in Bodega Harbor, California, using a series of laboratory and field experiments examining intraspecific pressures of adults on juveniles in the population. This measure of intraspecific pressure was used to predict the overcompensatory potential of the population in response to increased mortality from ongoing removal efforts. This prediction was then assessed using pre- and post-removal surveys of juvenile recruitment in Bodega Harbor compared to nearby populations, testing for evidence of overcompensation. While adult C. maenas in Bodega Harbor had limited negative impacts on juveniles, I concluded it was unlikely to result in overcompensation. Relative juvenile abundance did not statistically increase in removal compared to reference populations, consistent with my conclusion from the experiments. Increases in recruitment rates can occur as a result of efforts to remove non-native species. This increase in recruitment can result in overcompensation, but more commonly results in compensation, where recruitment rates increase relative to pre-removal recruitment but does not result in in the population's abundance exceeding pre-removal levels. However, a detailed and accurate prediction of the response of a population to harvest is time consuming and data intensive. This is not feasible for most efforts to eradicate non-native species, which have the greatest chance of success when enacted rapidly after detection. For my final chapter, I performed a literature review and accompanying statistical analysis to determine if typically available information related to the removal effort (site size, site connectivity, and removal technique) could be used to determine increased risk of compensation for a given effort to remove aquatic invasive species. Compensation was closely linked to unsuccessful removal efforts and was observed only among efforts utilizing physical removal methods. However, the frequency with which compensation occurred varied with the exact technique employed, occurring most frequently in removal utilizing electrofishing. Additionally, evidence of compensation was more frequent among larger removal areas with variable connectivity. While other predictors (temperature, effort, etc) might add to the predicative power, the findings of the review provide criteria for managers to determine the relative risk of compensation prior to the start of removal. Further understanding of how invasive species respond to lethal biotic interactions, including anthropogenically mediated control measures, can aid in assessing the risk of invasion for a given species and inform managers of the risk of complications resulting from removal efforts. While inducible defenses may contribute to the long-term success of an introduced species in their recipient range, my findings did not support the idea that inducible defenses triggered by predator cues contributed to their initial introduction in this case. However, research on other non-native species and offspring of previously naïve prey would allow for a clearer picture of the role of inducible defenses in the invasion process. Compensation resulting from removal efforts does not guarantee failure, and certain characteristics of removal efforts seem to indicate increased risk of compensation. Together these components help identify how biotic interactions surrounding mortality risk of an invading species help shape the trajectory of invasion.