Relevant bibliographies by topics / Snap-trapping

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Academic literature on the topic 'Snap-trapping'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Snap-trapping"

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Galindo-Leal, Carlos. "Live-trapping vs. snap-trapping of deer mice: a comparison of methods." Acta Theriologica 35 (June 9, 1990): 357–63. http://dx.doi.org/10.4098/at.arch.90-40.

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Luescher, Michael, and Jeffrey Bode. "Evidence for a Radical Mechanism in Cu(II)-Promoted SnAP Reactions." Synlett 30, no. 04 (February 5, 2019): 464–70. http://dx.doi.org/10.1055/s-0037-1611670.

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Saturated nitrogen heterocycles can be found with increasing abundance in bioactive molecules despite a limited number of methods to access these scaffolds. However, the coupling of recently introduced SnAP [tin (Sn) amine protocol] reagents with a wide range of aldehydes and ketones has proven to be a reliable, practical, and versatile one-step approach to saturated N-heterocycles. While effective, the lack of mechanistic understanding limits efforts to develop new catalytic and enantioselective variants. To distinguish between a polar or radical mechanism, we assessed Lewis and Brønsted acids, radical trapping experiments, and radical clock SnAP reagents reinforcing the current understanding of the SnAP protocol as a radical cyclization.
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Whitman, Jackson S. "Diet and Prey Consumption Rates of Nesting Boreal Owls, Aegolius funereus, in Alaska." Canadian Field-Naturalist 123, no. 2 (April 1, 2009): 112. http://dx.doi.org/10.22621/cfn.v123i2.688.

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Dietary composition and prey consumption rates of nesting Boreal Owls, Aegolius funereus, were investigated during 2004–2006 using two methods. Dietary composition was determined during nest visits through examination of 1882 fresh remains containing at least 11 mammalian and 15 avian species. Consumption rates were calculated based on laboratory examination of seven prey detritus bricks following fledging, yielding 1051 items of five different taxa. During 2003–2006, small mammal snap-trapping was conducted in the vicinity of occupied nest boxes, and relative abundance of potential prey items was estimated. A total of 4020 trap-nights yielded 695 small mammal captures of eight species. Consumption rates of nestling owls ranged from 22.0 to 29.7 g of food per day, averaging 24.2 g (SD = 1.8). Comparisons between availability of small mammals (as indicated by snap-trapping) and consumption (as indicated by nest visits and analysis of prey detritus bricks) showed that Boreal Owls are generally preying on mammals proportionate to their occurrence.
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Srilakshmi, Gollapudi Venkata, and Arabinda Chaudhuri. "“Snap-Shooting” the Interface of AOT Reverse Micelles: Use of Chemical Trapping." Chemistry - A European Journal 6, no. 15 (August 4, 2000): 2847–53. http://dx.doi.org/10.1002/1521-3765(20000804)6:15<2847::aid-chem2847>3.0.co;2-q.

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Village, A., and D. Myhill. "Estimating small mammal abundance for predator studies: snap-trapping versus sign indices." Journal of Zoology 222, no. 4 (December 1990): 681–89. http://dx.doi.org/10.1111/j.1469-7998.1990.tb06023.x.

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Holt, Denver W., Michael T. Maples, and Chris Savok. "Black Color Morph of the Brown Lemming, Lemmus trimucronatus = L. sibiricus." Canadian Field-Naturalist 117, no. 3 (July 1, 2003): 466. http://dx.doi.org/10.22621/cfn.v117i3.808.

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A black pelage Brown Lemming is reported from Barrow, Alaska. The occurrence of this black color morph appears to be rare. During twelve years of Snowy Owl research and lemming trapping, only one has been seen. Of 554 snap-trapped Brown Lemmings and 1649 Brown Lemmings found cached at owl nests, no black individuals were found. The pelage of the black morph is described using a Munsell Soil Color Chart.
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Zhang, Zhiwei, Simon Pusateri, Binglin Xie, and Nan Hu. "Tunable energy trapping through contact-induced snap-through buckling in strips with programmable imperfections." Extreme Mechanics Letters 37 (May 2020): 100732. http://dx.doi.org/10.1016/j.eml.2020.100732.

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Barney, Sarah K., Devin R. Leopold, Kainana Francisco, David J. Flaspohler, Tadashi Fukami, Christian P. Giardina, Daniel S. Gruner, Jessie L. Knowlton, William C. Pitt, and Erin E. Wilson Rankin. "Successful management of invasive rats across a fragmented landscape." Environmental Conservation 48, no. 3 (June 23, 2021): 200–207. http://dx.doi.org/10.1017/s0376892921000205.

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SummaryIntroduced mammalian predators are responsible for the decline and extinction of many native species, with rats (genus Rattus) being among the most widespread and damaging invaders worldwide. In a naturally fragmented landscape, we demonstrate the multi-year effectiveness of snap traps in the removal of Rattus rattus and Rattus exulans from lava-surrounded forest fragments ranging in size from <0.1 to >10 ha. Relative to other studies, we observed low levels of fragment recolonization. Larger rats were the first to be trapped, with the average size of trapped rats decreasing over time. Rat removal led to distinct shifts in the foraging height and location of mongooses and mice, emphasizing the need to focus control efforts on multiple invasive species at once. Furthermore, because of a specially designed trap casing, we observed low non-target capture rates, suggesting that on Hawai‘i and similar islands lacking native rodents the risk of killing non-target species in snap traps may be lower than the application of rodenticides, which have the potential to contaminate food webs. These efforts demonstrate that targeted snap-trapping is an effective removal method for invasive rats in fragmented habitats and that, where used, monitoring of recolonization should be included as part of a comprehensive biodiversity management strategy.
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Harper, Grant, and Dick Veitch. "Population ecology of Norway rats (Rattus norvegicus) and interference competition with Pacific rats (R. exulans) on Raoul Island, New Zealand." Wildlife Research 33, no. 7 (2006): 539. http://dx.doi.org/10.1071/wr05096.

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Norway rats (Rattus norvegicus) are sympatric with, and more often trapped, than the smaller Pacific rat (R. exulans) on Raoul Island, New Zealand. Rats were removed from a four-hectare grid by trapping and poisoning in the winters of 1994, 1995 and 1996. Pacific rats were trapped in increasing numbers only after Norway rats were removed. Norway rats also ate significantly more bait than Pacific rats. Competitive interference of Pacific rats by Norway rats was apparent, which casts doubt on the ability to accurately monitor individual species abundance within assemblages of rat species and to effectively manage them in control grids. Snap-trapping lines provided baseline data on the abundance of the two species before, during and after the removal grids were operated. Maximum abundances of rats were recorded in late summer and autumn following spring and summer breeding.
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Xia, Xuhua, and John S. Millar. "Sex-related dispersion of breeding deer mice in the Kananaskis Valley, Alberta." Canadian Journal of Zoology 64, no. 4 (April 1, 1986): 933–36. http://dx.doi.org/10.1139/z86-141.

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Snap trapping of small mammals in the Kananaskis Valley, Alberta, during the breeding seasons of 1982 and 1983 provided data used to analyse sex-related dispersion patterns of adult Peromyscus maniculatus. A dispersion pattern of regular alternation of males and females, within-sex avoidance, and strong between-sex association was found. Within-sex exclusion was better exhibited by females than by males. These data are consistent with what would be expected for a promiscuous mating system. Intraspecific resource partitioning between different sexes may occur through adjustments in spatial relationships.
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Dissertations / Theses on the topic "Snap-trapping"

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Hörnfeldt, Birger. "Cycles of voles, predators, and alternative prey in boreal Sweden." Doctoral thesis, Umeå universitet, Ekologi och geovetenskap, 1991. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-100711.

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Bank voles, grey-sided voles, and field voles had synchronous 3-4 year density cycles with variable amplitudes which averaged about 200-fold in each species. Cycles of vole predators (red fox and Tengmalm's owl), and their (foxes') alternative prey (mountain hare and forest grouse) lagged behind the vole cycles. The nomadic Tengmalm's owl responded with a very rapid and strong numerical increase to the initial cyclic summer increase of voles (the owl’s staple food). Owl breeding densities in the springs were highly correlated with vole supply in the previous autumns. This suggested that the number of breeding owls was largely determined in the autumn at the time of the owl's nomadic migrations, and that immigration was crucial for the rapid rise in owl numbers. The owl's numerical response was reinforced by the laying of earlier and larger clutches when food was plentiful. In addition, the owl has an early maturation at one year of age. The transition between subsequent vole cycles was characterized by a distinct shift in rate of change in numbers from low to high or markedly higher values in both summer and winter. Regulation increased progressively throughout the cycle since the rate of change decreased continuously in the summers. Moreover, there was a similar decrease of the rate of change in winter. Rate of change was delayed density-dependent. The delayed density-dependence had an 8 month time-lag in the summers and a 4 month time-lag in the winters relative to the density in previous autumns and springs, respectively. These findings suggest that vole cycles are likely to be generated by a time-lag mechanism. On theoretical grounds, it has been found that a delayed density- dependence of population growth rate with a 9 month time-lag caused stable limit cycles with a period between 3 and 4 years. Some mechanisms for the delayed density-dependence are suggested and discussed. The mechanisms are assumed to be related to remaining effects of vole populations past interactions with predators, food supplies, and/or diseases. Unlike the other voles, the bank vole had regular and distinct seasonal declines in density over winter. These declines are proposed to be due to predation, mainly by Tengmalm's owl. Supranivean foraging for epiphytic tree lichens and conifer seeds most likely explains why this species was frequently taken by the owl under snow-rich conditions. The alternative prey hypothesis predicts that a reduction of predator numbers should increase the number of alternative prey. Alternative prey should be less effectively synchronized to the vole cycle by predation at declining and low vole (main prey) densities; they may also lose their 3-4 year cyclicity. The appearance of sarcoptic mange among foxes in northern Sweden in the mid 1970s provided an opportunity to "test" these ideas, and these were found to be supported. In areas with highest mange infection rates, foxes declined markedly from the late 1970s to mid 1980s, whereas hare numbers rose rapidly and appeared non-cyclic.

Diss. (sammanfattning) Umeå : Umeå universitet, 1991, härtill 7 uppsatser


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Books on the topic "Snap-trapping"

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Poppinga, Simon, Ulrike Bauer, Thomas Speck, and Alexander G. Volkov. Motile traps. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198779841.003.0014.

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We review the biomechanics, functional morphology, and physiology of motile traps. The movements of snap traps in Aldrovanda and Dionaea, motile adhesive traps in Drosera and Pinguicula, and suction traps in Utricularia are driven by active water displacement processes leading to reversible turgor changes of motor cells, irreversible growth, or mechanical pre-stressing of tissues. In some cases, the motion is amplified by the release of elastic energy stored in these tissues. The only known case of a passive motile trapping movement is the ‘springboard’ trapping mechanism of Nepenthes gracilis, in which a rapid vibration of the pitcher lid is actuated by the impact force of raindrops. Open research questions are summarized and future studies are suggested.
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Conference papers on the topic "Snap-trapping"

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Medina, Lior, Rivka Gilat, and Slava Krylov. "Dynamic Trapping in Bi-Stable Electrostatically Actuated Curved Micro Beams." In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-34880.

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Micro and nano devices incorporating bi-stable structural elements such as micro beams are designed to exploit the fact that the latter possess two stable configurations at the same actuation force. Generally, the transition of a micro beam from one table state to another, namely the snap-through which is essentially dynamic phenomenon, can be initiated by either static or dynamic activations. In this work, results of theoretical and numerical investigations of the transient dynamics of a pre-stressed initially curved double clamped micro beams actuated by a time dependent electrostatic load are presented. We show by means of a reduced order model of a shallow beam, derived using the Galerkin procedure, that the beam may exhibit various types of responses. For certain beam characteristics, the second stable state is inaccessible under a static loading but is attainable only by means of a specially tailored dynamic actuation. This gives way to the possibility of trapping the dynamically bi-stable beam at a stable configuration which is close to the electrode by applying special loading sequences.
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Erol, Anil, and Jeffery Baur. "Analysis of Multi-Stable Architectures for Morphing Structures." In ASME 2020 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/smasis2020-2395.

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Abstract The field of multi-stable structures has been steadily growing due to a wide range of potential applications including energy harvesting, MEMS, and mechanical logic. This work focuses on utilizing elastic energy trapping and snap-through phenomena of bistable unit cells to design a latticed, hierarchical multi-stable cylinder that can articulate up to 30 degrees from its center axis. The employment of bistable elements is hypothesized to reduce the total strain energy required to articulate the cylinder, and yield faster responses with the snap-through. While multi-stable cylinders exist in previous studies, there have been no previous attempts at studying different modes of deformation beyond compressive loading. Thus, the current work presents a new problem regarding the effects of bistable elements in a latticed cylinder that is carrying tensile, compressive, and shear loadings and exhibiting large displacements as the cylinder is articulated.. The total strain energy density of the articulating cylinder is investigated as a function of the heights of the unit cells, which aids in determining an ideal height for the design that minimizes the strain energy density. Results show that the strain energy of an articulating cylinder can be minimized with the use of multi-stability, and that a multi-stable cylinder can require up to three times less loads to maintain desired articulation compared to a mono-stable structure. These results will lead to future works on further optimizing the articulating cylinder by varying additional parameters like the individual heights of rows, the thicknesses of unit cell beams, the strain energy density, and the initial loading threshold for articulation. In addition, the work in this study can yield methodologies for designing arbitrarily morphing skins beyond just cylindrical geometries.
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