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  • 1
    Online Resource
    Online Resource
    Guanacos and People in Patagonia : A Social-Ecological Approach to a Relationship of Conflicts and Opportunities (2022)
    Cham :Springer International Publishing :
    Details
    Keywords: Ecology . ; Conservation biology. ; Applied ecology. ; Environmental management. ; Ecology. ; Conservation Biology. ; Applied Ecology. ; Environmental Management.
    Description / Table of Contents: Introduction: Taxonomy, distribution and conservation status of wild guanaco’s populations -- 1. Zooarchaeological and socio-anthropological perspective of the human - guanaco (Lama guanicoe) interaction over the last 6000 years in the Patagonia, Argentina -- 2. Interspecific competition between guanacos and livestock and its impact on Patagonian rangelands: review and synthesis -- 3. Health status of Patagonian guanaco and its relevance for conservation -- 4. Patagonian pumas and their ungulate prey in the 21st century, a key interaction in a degraded environment -- 5. International policies and national legislation concerning guanaco conservation, management and trade in Argentina -- 6. Guanaco sustainable management as a conservation strategy and socioeconomic rural development -- 7. Historical perspective and current advances in ecology, conservation and management of the guanaco in the Chilean Patagonia -- 8. Lessons for the future of conservation and sustainable use of guanacos.
    Abstract: This book relates one of the most representative species of Patagonian wildlife, the guanaco, to human societies across time, and explores how that relationship has changed over time due to different land uses and productive interests. The book provides information to understand these interactions, and contextualizes the current situation of this species. In some cases, it proposes possible solutions to conflicts, and also shows ongoing activities aimed at sustainable use and conservation. The audience for this book includes researchers, graduate students, policy makers and conservation and rural development professionals. In addition, it will serve as a tool for application authorities and field technicians on the use and conservation of wildlife, to define management actions for this species. .
    Type of Medium: Online Resource
    Pages: XII, 241 p. 23 illus., 16 illus. in color. , online resource.
    Edition: 1st ed. 2022.
    ISBN: 9783031066566
    Series Statement: Natural and Social Sciences of Patagonia,
    URL: https://doi.org/10.1007/978-3-031-06656-6
    DOI: 10.1007/978-3-031-06656-6
    DDC: 577
    Language: English
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    E-BOOKS (AWI ONLY)
  • 2
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    An experimental approach to evaluate the potential of drones in terrestrial mammal research: a gregarious ungulate as a study model (2020)
    The Royal Society
    Details
    Publication Date: 2020-01-01
    Description: Research on the use of unmanned aircraft systems (UAS) in wildlife has made remarkable progress recently. Few studies to date have experimentally evaluated the effect of UAS on animals and have usually focused primarily on aquatic fauna. In terrestrial open arid ecosystems, with relatively good visibility to detect animals but little environmental noise, there should be a trade-off between flying the UAS at high height above ground level (AGL) to limit the disturbance of animals and flying low enough to maintain count precision. In addition, body size or social aggregation of species can also affect the ability to detect animals from the air and their response to the UAS approach. To address this gap, we used a gregarious ungulate, the guanaco ( Lama guanicoe ), as a study model. Based on three types of experimental flights, we demonstrated that (i) the likelihood of miscounting guanacos in images increases with UAS height, but only for offspring and (ii) higher height AGL and lower UAS speed reduce disturbance, except for large groups, which always reacted. Our results call into question mostly indirect and observational previous evidence that terrestrial mammals are more tolerant to UAS than other species and highlight the need for experimental and species-specific studies before using UAS methods.
    Electronic ISSN: 2054-5703
    Topics: Natural Sciences in General
    Published by The Royal Society
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  • 3
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    The Ecology of Stress: linking life-history traits with physiological control mechanisms in free-living guanacos (2016)
    PeerJ
    Details
    Publication Date: 2016-11-02
    Description: BackgroundProviding the context for the evolution of life-history traits, habitat features constrain successful ecological and physiological strategies. In vertebrates, a key response to life’s challenges is the activation of the Stress (HPA) and Gonadal (HPG) axes. Much of the interest in stress ecology is motivated by the desire to understand the physiological mechanisms in which the environment affects fitness. As reported in the literature, several intrinsic and extrinsic factors affect variability in hormone levels. In both social and non-social animals, the frequency and type of interaction with conspecifics, as well as the status in social species, can affect HPA axis activity, resulting in changes in the reproductive success of animals. We predicted that a social environment can affect both guanaco axes by increasing the secretion of testosterone (T) and Glucocorticoid (GCs) in response to individual social interactions and the energetic demands of breeding. Assuming that prolonged elevated levels of GCs over time can be harmful to individuals, it is predicted that the HPA axis suppresses the HPG axis and causes T levels to decrease, as GCs increase.MethodsAll of the data for individuals were collected by non-invasive methods (fecal samples) to address hormonal activities. This is a novel approach in physiological ecology because feces are easily obtained through non-invasive sampling in animal populations.ResultsAs expected, there was a marked adrenal (p-value = .3.4e−12) and gonadal (p-value = 0.002656) response due to seasonal variation inLama guanicoe. No significant differences were found in fecal GCs metabolites between males/females*season for the entire study period (p-value = 0.2839). Despite the seasonal activity variation in the hormonal profiles, our results show a positive correlation (p-value = 1.952e−11, COR = 0.50) between the adrenal and gonadal system. The marked endocrine (r2 = 0.806) and gonad (r2 = 0.7231) response due to seasonal variation in male guanaco individuals highlights the individual’s energetic demands according to life-history strategies. This is a remarkable result because no inhibition was found between the axes as theory suggests. Finally, the dataset was used to build a reactive scope model for guanacos.DiscussionGuanacos cope with the trade-off between sociability and reproductive benefits and costs, by regulating their GCs and T levels on a seasonal basis, suggesting an adaptive role of both axes to different habitat pressures. The results presented here highlight the functional role of stress and gonad axes on a critical phase of a male mammal’s life—the mating period—when all of the resources are at the disposal of the male and must be used to maximize the chances for reproductive success.
    Electronic ISSN: 2167-8359
    Topics: Biology , Medicine
    Published by PeerJ
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