Search results for: Michael J. Sheriff

Items from 1 to 20 out of 24 results

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Population and community consequences of perceived risk from humans in wildlife

Justine A. Smith, Megan E. McDaniels, Scott D. Peacor, Ellen C. Bolas, more

Human activities catalyse risk avoidance behaviours in wildlife across taxa and systems. However, the broader ecological significance of human‐induced risk perception remains unclear, with a limited understanding of how phenotypic responses scale up to affect population or community dynamics. We present a framework informed by predator–prey ecology to predict the occurrence of non‐consumptive effects...

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Playing it safe; risk‐induced trait responses increase survival in the face of predation

Olivia Aguiar, Sam Sonnega, Eleanor R. DiNuzzo, Michael J. Sheriff

Journal of Animal Ecology > 92 > 3 > 690 - 697

Predation risk effects are impacts on prey caused by predators that do not include consumption. These can include changes in prey behaviour, physiology, and morphology (i.e. risk‐induced trait responses), which can have consequences to individual fitness and population dynamics (i.e. non‐consumptive effects). While these risk‐induced trait responses (RITRs) can lower individual fitness as compared...

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A skewed literature: Few studies evaluate the contribution of predation‐risk effects to natural field patterns

Scott D. Peacor, Nathan J. Dorn, Justine A. Smith, Nicole E. Peckham, more

Ecology Letters > 25 > 9 > 2048 - 2061

A narrative in ecology is that prey modify traits to reduce predation risk, and the trait modification has costs large enough to cause ensuing demographic, trophic and ecosystem consequences, with implications for conservation, management and agriculture. But ecology has a long history of emphasising that quantifying the importance of an ecological process ultimately requires evidence linking a process...

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Beyond spatial overlap: harnessing new technologies to resolve the complexities of predator–prey interactions

Justin P. Suraci, Justine A. Smith, Simon Chamaillé‐Jammes, Kaitlyn M. Gaynor, more

Oikos > 2022 > 8 > n/a - n/a

Predation risk, the probability that a prey animal will be killed by a predator, is fundamental to theoretical and applied ecology. Predation risk varies with animal behavior and environmental conditions, yet attempts to understand predation risk in natural systems often ignore important ecological and environmental complexities, relying instead on proxies for actual risk such as predator–prey spatial...

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Non‐consumptive predator effects on prey population size: A dearth of evidence

Michael J. Sheriff, Scott D. Peacor, Dror Hawlena, Maria Thaker, more

Journal of Animal Ecology > 89 > 6 > 1302 - 1316

There is a large and growing interest in non‐consumptive effects (NCEs) of predators. Diverse and extensive evidence shows that predation risk directly influences prey traits, such as behaviour, morphology and physiology, which in turn, may cause a reduction in prey fitness components (i.e. growth rate, survival and reproduction). An intuitive expectation is that NCEs that reduce prey fitness will...

article

A collaborative approach to bridging the gap between wildlife managers and researchers

Jerod A. Merkle, Neil J. Anderson, Danna L. Baxley, Matthew Chopp, more

The Journal of Wildlife Management > 83 > 8 > 1644 - 1651

Although most wildlife professionals agree that science should inform wildlife management decisions, disconnect still exists between researchers and managers. If researchers are not striving to incorporate their findings into management decisions, support for research programs by managers can wane. If managers are not using research findings to inform management decisions, those decisions may be less...

article

Snow roosting reduces temperature-associated stress in a wintering bird

Amy A. Shipley, Michael J. Sheriff, Jonathan N. Pauli, Benjamin Zuckerberg

Oecologia > 2019 > 190 > 2 > 309-321

Animals in temperate northern regions employ a variety of strategies to cope with the energetic demands of winter. Behavioral plasticity may be important, as winter weather conditions are increasingly variable as a result of modern climate change. If behavioral strategies for thermoregulation are no longer effective in a changing environment, animals may experience physiological stress, which can...

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Integrating temporal refugia into landscapes of fear: prey exploit predator downtimes to forage in risky places

Justine A. Smith, Emiliano Donadio, Jonathan N. Pauli, Michael J. Sheriff, more

Oecologia > 2019 > 189 > 4 > 883-890

The landscape of fear is an important driver of prey space use. However, prey can navigate the landscape of fear by exploiting temporal refuges from predation risk. We hypothesized that diel patterns of predator and prey movement and space use would be inversely correlated due to temporal constraints on predator habitat domain. Specifically, we evaluated habitat selection and activity of the vicuña...

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Maternal stress alters the phenotype of the mother, her eggs and her offspring in a wild‐caught lizard

David C. Ensminger, Tracy Langkilde, Dustin A. S. Owen, Kirsty J. MacLeod, more

Journal of Animal Ecology > 87 > 6 > 1685 - 1697

While biomedical researchers have long appreciated the influence of maternally derived glucocorticoids (GCs) on offspring phenotype, ecologists have only recently begun exploring its impact in wild animals. Interpreting biomedical findings within an ecological context has posited that maternal stress, mediated by elevations of maternal GCs, may play an adaptive role preparing offspring for a stressful...

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Fear and lethality in snowshoe hares: the deadly effects of non‐consumptive predation risk

Kirsty J. MacLeod, Charles J. Krebs, Rudy Boonstra, Michael J. Sheriff

Oikos > 127 > 3 > 375 - 380

Predators play a critical, top–down role in shaping ecosystems, driving prey population and community dynamics. Traditionally, studies of predator‐prey interactions have focused on direct effects of predators, namely the killing of prey. More recently, the non‐consumptive effects of predation risk are being appreciated; e.g. the ‘ecology of fear’. Prey responses to predation risk can be morphological,...

article

Stress During Adolescence Shapes Performance in Adulthood: Context‐Dependent Effects on Foraging and Vigilance

Lauren E. Chaby, Michael J. Sheriff, Sonia A. Cavigelli, Amy M. Hirrlinger, more

Ethology > 122 > 4 > 284 - 297

Exposure to chronic stress during adolescence can shape behaviour, cognition and physiology in adulthood, but the consequences of these long‐term changes remain unclear. Prior studies reporting altered performance following exposure to stress in adolescence have generally interpreted lasting changes as impairments. However, we have recently shown that exposure to chronic unpredictable stress during...

article

Error management in plant allocation to herbivore defense

John L. Orrock, Andy Sih, Maud C.O. Ferrari, Richard Karban, more

Trends in Ecology & Evolution > 2015 > 30 > 8 > 441-445

Herbivores can greatly reduce plant fitness. Error management theory (EMT) predicts the evolution of adaptive plant defensive strategies that err towards making less-costly errors so as to avoid making rare, costly errors. EMT provides a common framework for understanding observed levels of variation in plant defense among and within species.

article

Does early stress prepare individuals for a stressful future? Stress during adolescence improves foraging under threat

Lauren E. Chaby, Michael J. Sheriff, Amy M. Hirrlinger, Victoria A. Braithwaite

Animal Behaviour > 2015 > 105 > Complete > 37-45

Adolescent exposure to adverse environmental conditions can cause lasting changes in behaviour, cognition and physiology. One explanation for why such changes occur is that they allow organisms to adjust aspects of their phenotype to enhance function in an unfavourable environment. This concept has been investigated for stress during gestation (e.g. thrifty phenotype hypothesis, maternal mismatch...

article

The adaptive potential of maternal stress exposure in regulating population dynamics

Michael J. Sheriff, Graeme Hays

Journal of Animal Ecology > 84 > 2 > 323 - 325

Bian, J.‐H., Du, S.‐Y., Wu, Y., Cao, Y.‐F., Nie, X.‐H., He, H. & You, Z.‐B. (2015) Maternal effects and population regulation: maternal density‐induced reproduction suppression impairs offspring capacity in response to immediate environment in root voles Microtus oeconomus. Journal of Animal Ecology, 84, 326–336. Ecologists, evolutionary biologists and biomedical researchers are investing great...

article

Autumn conditions as a driver of spring phenology in a free-living arctic mammal

Michael J Sheriff, C Loren Buck, Brian M Barnes

Climate Change Responses > 2015 > 2 > 1 > 1-8

Background Several studies have shown that birds and mammals are breeding earlier in response to earlier spring conditions. Delay in the onset of winter should also affect reproductive timing and may allow for breeding later instead of earlier in spring, if extended autumns lengthen the season that food is available to offspring. Using 4 years of fine-scale environmental and phenological data of annual...

article

Ecophysiological effects of predation risk; an integration across disciplines

Michael J. Sheriff, Jennifer S. Thaler

Oecologia > 2014 > 176 > 3 > 607-611

article

Maternal adversity and ecological stressors in natural populations: the role of stress axis programming in individuals, with implications for populations and communities

Oliver P. Love, Patrick O. McGowan, Michael J. Sheriff, Rudy Boonstra

Functional Ecology > 27 > 1 > 81 - 92

Biomedical researchers have long appreciated that maternal stressors can induce preparative and adaptive programming in offspring via exposure to maternal Glucocorticoids (GCs). However, few ecologists are aware of the capacity for maternal GC exposure to translate ecological and environmental stressors into preparative and adaptive programmed offspring responses in free‐living systems. We review...

article

Predator‐induced stress and the ecology of fear

Michael Clinchy, Michael J. Sheriff, Liana Y. Zanette, Rudy Boonstra

Functional Ecology > 27 > 1 > 56 - 65

Predator‐induced stress has been used to exemplify the concept of stress for close to a century because almost everyone can imagine the terror of fleeing for one's life from a lion or a tiger. Yet, because it has been assumed to be acute and transitory, predator‐induced stress has not been much studied by either comparative physiologists or population ecologists, until relatively recently.The focus...

article

Thermoregulatory changes anticipate hibernation onset by 45 days: data from free-living arctic ground squirrels

Michael J. Sheriff, Cory T. Williams, G. J. Kenagy, C. Loren Buck, more

Journal of Comparative Physiology B > 2012 > 182 > 6 > 841-847

Hibernation is a strategy of reducing energy expenditure, body temperature (T _b) and activity used by endotherms to escape unpredictable or seasonally reduced food availability. Despite extensive research on thermoregulatory adjustments during hibernation, less is known about transitions in thermoregulatory state, particularly under natural conditions. Laboratory studies on hibernating ground squirrels...

article

Data logging of body temperatures provides precise information on phenology of reproductive events in a free-living arctic hibernator

Cory T. Williams, Michael J. Sheriff, Joel A. Schmutz, Franziska Kohl, more

Journal of Comparative Physiology B > 2011 > 181 > 8 > 1101-1109

Precise measures of phenology are critical to understanding how animals organize their annual cycles and how individuals and populations respond to climate-induced changes in physical and ecological stressors. We show that patterns of core body temperature (T _b) can be used to precisely determine the timing of key seasonal events including hibernation, mating and parturition, and immergence and emergence...

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INFONA - science communication portal

Search results for: Michael J. Sheriff

Population and community consequences of perceived risk from humans in wildlife

Playing it safe; risk‐induced trait responses increase survival in the face of predation

A skewed literature: Few studies evaluate the contribution of predation‐risk effects to natural field patterns

Beyond spatial overlap: harnessing new technologies to resolve the complexities of predator–prey interactions

Non‐consumptive predator effects on prey population size: A dearth of evidence

A collaborative approach to bridging the gap between wildlife managers and researchers

Snow roosting reduces temperature-associated stress in a wintering bird

Integrating temporal refugia into landscapes of fear: prey exploit predator downtimes to forage in risky places

Maternal stress alters the phenotype of the mother, her eggs and her offspring in a wild‐caught lizard

Fear and lethality in snowshoe hares: the deadly effects of non‐consumptive predation risk

Stress During Adolescence Shapes Performance in Adulthood: Context‐Dependent Effects on Foraging and Vigilance

Error management in plant allocation to herbivore defense

Does early stress prepare individuals for a stressful future? Stress during adolescence improves foraging under threat

The adaptive potential of maternal stress exposure in regulating population dynamics

Autumn conditions as a driver of spring phenology in a free-living arctic mammal

Ecophysiological effects of predation risk; an integration across disciplines

Maternal adversity and ecological stressors in natural populations: the role of stress axis programming in individuals, with implications for populations and communities

Predator‐induced stress and the ecology of fear

Thermoregulatory changes anticipate hibernation onset by 45 days: data from free-living arctic ground squirrels

Data logging of body temperatures provides precise information on phenology of reproductive events in a free-living arctic hibernator

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