125 research outputs found

    Hunting in Maine

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    Hunting remains a common practice for many people in the state of Maine. While the stories and traditions held by hunters differ from person to person and family to family. There are commonalities that aid in building the sense of community between hunters in the state of Maine. This hunting community is strengthened through the sharing of stories and the common traditions shared by many. These communities remain strong even as the Maine landscape and hunting legislation changes over time. Here a number of questions regarding hunting are explored through the lens of one family spanning multiple generations through oral interviews. This thesis analyzes the stories and interviews of this family to find commonalities in the hunting community and answer important questions like “why do we hunt?

    Facial Patterns are a Conventional Signal of Agonistic Ability in Polistes exclamans Paper Wasps

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    Some animals minimize the high costs of aggressive conflict by using conventional signals of agonistic ability to assess rivals prior to interacting. Conventional signals are more controversial than other signals of agonistic ability because they lack an inherent physical or physiological link with their bearer’s agonistic ability. Here, we test whether the variable brown facial stripes in Polistes exclamans paper wasps function as a conventional signal. Polistes exclamans were given the option of challenging or avoiding a rival with an experimentally altered facial pattern. Our results show that rival assessment is based on the facial patterns of rivals, as well as an individual’s own size, facial patterns, and nesting strategy. Individuals with larger body size and larger brown facial stripes were more likely to challenge rivals than individuals with smaller body size and smaller brown facial stripes. In addition, large individuals were more likely to challenge rivals with large brown facial stripes than small individuals, while an individual’s own body size did not influence whether or not they challenged rivals with small brown stripes. Individuals who previously nested in multiple queen groups approached rivals more rapidly than individuals who previously nested alone, suggesting that social experience also plays a role in rival assessment. Finally, rivals with small facial stripes were challenged more rapidly than those with large facial stripes. These results demonstrate that P. exclamans facial patterns function as a signal used to minimize the cost of conflict. However, individuals do not make simple decisions based on their rival’s signal alone, as an individual’s own social experience and agonistic abilities also influence rival assessment decisions.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/87088/1/j.1439-0310.2011.01967.x.pd

    EVOLUTION OF IDENTITY SIGNALS: FREQUENCY-DEPENDENT BENEFITS OF DISTINCTIVE PHENOTYPES USED FOR INDIVIDUAL RECOGNITION

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    Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/74986/1/j.1558-5646.2009.00833.x.pd

    Co-evolution of plumage characteristics and winter sociality in New and Old World sparrows

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    Understanding the evolution of phenotypic diversity, including the stunning array of avian plumage characters, is a central goal of evolutionary biology. Here, we applied a comparative analysis to test factors associated with the origin and maintenance of black chest and throat patches, which in some taxa are referred to as ‘badges-of-status’. Specifically, we tested whether the evolution of black colour patches in Old and New World sparrows is consistent with a signalling function during the nonbreeding season or breeding season. We found no positive associations between patch evolution and polygyny or summer sociality. Instead, patch evolution is significantly associated with sociality during the nonbreeding season. Additionally, unlike typical plumage characteristics under sexual selection, these patches are visible throughout the nonbreeding season. Further, the pattern of patch dimorphism uncovered in this study does not match expectations for a trait that evolved in a reproductive context. In particular, patch dimorphism is not associated with polygyny or the presence of extra-pair mating although other types of plumage dimorphism are strongly associated with nonmonogamous mating systems. Overall, patterns of patch evolution suggest that they are more strongly associated with social competition during the nonbreeding season than sexual competition during the breeding season. These results clarify why some previous work has uncovered puzzling relationships between black plumage patches and reproductive behaviour. We discuss these findings in the context of signal theory and previous work on badges-of-status.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/78723/1/j.1420-9101.2009.01861.x.pd

    Elizabeth Laird Tibbetts Correspondence

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    Entries include handwritten letters of book presentation with reference to his publisher on personal stationery from Stevens and a typed letter from Jacob of the Maine State Library on receipt of his book on the history of Bridgton Academy in North Bridgton, Maine

    Developmental plasticity and the origin of novel communication systems: Individual recognition in Polistes wasps*

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    Although developmental plasticity facilitates the evolutionary origin of many traits, the role of plasticity in the origin of novel communication systems has received little attention. If plasticity mediates the origin of new communication systems, exposure to a novel environment will induce new traits that could function as signals or receiver responses. Here, we test whether plasticity facilitates the origin of individual recognition. We reared a species of paper wasp that naturally lacks individual recognition (Polistes metricus) with a relative that has facial patterns that signal individual identity (Polistes fuscatus). We found P. metricus reared with individual identity signals learned unique wasp faces significantly more accurately than P. metricus reared without individual identity signals. However, exposure to individual identity signals was not sufficient to induce individual recognition in social contexts. These results suggest that if variable facial patterns arose in P. metricus, wasps would immediately improve their ability learn variable facial patterns, thereby facilitating the origin of individual face recognition. Improved learning is an initial step toward individual recognition that would need to be refined by selection to produce an established signaling system. Developmental plasticity may be an underappreciated factor facilitating the evolutionary origin of novel recognition systems.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/146923/1/evo13613_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/146923/2/evo13613.pd

    Specialized visual learning of facial signals of quality in the paper wasp, P olistes dominula

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    Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/109618/1/bij12394.pd

    Cognitive specialization for learning faces is associated with shifts in the brain transcriptome of a social wasp

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    The specialized ability to learn and recall individuals based on distinct facial features is known in only a few, large-brained social taxa. Social paper wasps in the genus Polistes are the only insects known to possess this form of cognitive specialization. We analyzed genome-wide brain gene expression during facial and pattern training for two species of paper wasps (P. fuscatus, which has face recognition, and P. metricus, which does not) using RNA sequencing. We identified 237 transcripts associated with face specialization in P. fuscatus, including some transcripts involved in neuronal signaling (serotonin receptor and tachykinin). Polistes metricus that learned faces (without specialized learning) and P. fuscatus in social interactions with familiar partners (from a previous study) showed distinct sets of brain differentially expressed transcripts. These data suggest face specialization in P. fuscatus is related to shifts in the brain transcriptome associated with genes distinct from those related to general visual learning and social interactions

    Tom Hudson. A study of his vision for art education

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    This research project investigates the pedagogy of Tom Hudson and his vision for art education. A critical overview of the relationship between Hudson’s pedagogical theory and practice is made, as well as a review of the influences and contexts that shaped the development of his ideas. Having played a significant role in the formation and progress of the Basic Design Movement, Hudson’s practice and ideas are considered and compared with respect to this period and the work of other protagonists, namely Harry Thubron, Victor Pasmore and Richard Hamilton. Hudson’s development of what essentially emerged from this has been investigated, providing an extensive review of what became known as the Foundation course through to Hudson’s retirement in 1987. Contemporary practices have also been considered and observed in order to gain an understanding of current debates and the place of Hudson’s pedagogical views within these. Familiar elements in his writing show that his ideas have relevance to current concerns and practices. Twenty-five years later we are still working to prove that ‘creative activity is more than a mere cultural frill’ (Hudson, 1979, BH/TH/PL/196, p. 2). The study includes a consideration of the archive as a theoretical framework for the artist educator’s research. A substantial amount of primary material for this research has been found within the National Arts Education Archive (NAEA@ysp), a valuable resource with much to offer the art and design educationalist, student or researcher
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