The Experts below are selected from a list of 1575 Experts worldwide ranked by ideXlab platform
Marek Konarzewski - One of the best experts on this subject based on the ideXlab platform.
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Microsatelite data of weasels, Bialowieza Forest, Poland
2016Co-Authors: Karol Zub, Paulina A. Szafrańska, Stuart Piertney, Marek KonarzewskiAbstract:Microsatelites data and mean phenotypic data (body mass and RMR) for weasels Mustela nivalis captured in Bialowieza Forest, Poland
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Phenotypic data (body mass and RMR) for multiple captures of weasels, Bialowieza Forest, Poland
2016Co-Authors: Karol Zub, Paulina A. Szafrańska, Stuart Piertney, Marek KonarzewskiAbstract:Phenotypic data (body mass and RMR) for multiple captures of weasels Mustela nivalis, Bialowieza Forest, Polan
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Seasonal variation of resting metabolic rate and body mass in free-living weasels Mustela nivalis.
Physiological and Biochemical Zoology, 2013Co-Authors: Paulina A. Szafrańska, Karol Zub, Marek KonarzewskiAbstract:Metabolic rates and body mass of mammals vary seasonally along with ambient temperatures and food availability. At the population level, seasonal changes in metabolic rate and mass can be due to selective mortality or emigration of individuals whose metabolic rate or mass differs from the average for the population. Alternatively, the metabolic rates of individuals can change seasonally, such that the population average increases or decreases due to shifts in the physiology of the overall population. The latter implies that individuals respond in a similar manner to changing seasonal conditions. We studied seasonal changes in body mass (BM) and resting metabolic rate (RMR) in free-ranging male weasels (Mustela nivalis) to test the consistency of these traits in individuals caught in different seasons of the year. At the population level, BM was remarkably stable across the seasons (F(3, 124)=0.25, P=0.9). In contrast, BM- corrected RMR varied significantly between seasons and was the lowest in winter (F(3, 135)=9.13, P
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seasonal variation of resting metabolic rate and body mass in free living weasels Mustela nivalis
Physiological and Biochemical Zoology, 2013Co-Authors: Paulina A. Szafrańska, Karol Zub, Marek KonarzewskiAbstract:Metabolic rates and body mass of mammals vary seasonally along with ambient temperatures and food availability. At the population level, seasonal changes in metabolic rate and mass can be due to selective mortality or emigration of individuals whose metabolic rate or mass differs from the average for the population. Alternatively, the metabolic rates of individuals can change seasonally, such that the population average increases or decreases due to shifts in the physiology of the overall population. The latter implies that individuals respond in a similar manner to changing seasonal conditions. We studied seasonal changes in body mass (BM) and resting metabolic rate (RMR) in free-ranging male weasels (Mustela nivalis) to test the consistency of these traits in individuals caught in different seasons of the year. At the population level, BM was remarkably stable across the seasons (F(3, 124)=0.25, P=0.9). In contrast, BM- corrected RMR varied significantly between seasons and was the lowest in winter (F(3, 135)=9.13, P<0.0001). We demonstrated that individual weasels were consistent in how their BM and RMR deviated from the seasonal means for the population (intraclass correlation, τ=0.78 and 0.33, respectively). This variation among individuals explained ~76% and 27% of the total variation of BM and basal metabolic rate, respectively. Hence, the relatively constant BM at the population level across seasons is due to a relative constancy of BM in individuals. Our study is one of relatively few research projects that demonstrate that seasonal changes in RMR observed in the wild population are in part due to a consistency in individual responses to changing environmental conditions.
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The energy cost of voluntary running in the weasel Mustela nivalis.
The Journal of experimental biology, 2012Co-Authors: Mark A Chappell, Karol Zub, Paulina A. Szafrańska, Marek KonarzewskiAbstract:The small size and elongate shape of weasels (Mustela nivalis) probably evolved to facilitate movement within the burrow systems of prey species, but result in high energy costs of thermoregulation. In this study we measured metabolic rates of weasels during voluntary locomotion to determine whether energy costs of transport are also high in these unusually shaped mammals. In addition, we measured the lower and upper limits of aerobic metabolism [resting metabolic rate (RMR) and maximal oxygen consumption in forced exercise (V(O(2),max))], and used the wide size range of adult weasels to investigate the intraspecific scaling of energy metabolism. Finally, we combined measurements of energy use during running with radiotracking and doubly labeled water data from free-living weasels to estimate the importance of locomotor costs in daily energy budgets. We found that weasels have higher than predicted costs of running, largely because of an elevated intercept of the speed versus metabolic rate relationship. Running costs were strongly affected by the approximately fourfold range of body size in adults. As reported in other studies, the RMR of weasels was considerably higher than predicted from body mass. Maximal oxygen consumption was also higher than predicted, but factorial aerobic scope (V(O(2),max)/RMR) was within the normal range for mammals. Intraspecific mass scaling of RMR and V(O(2),max) did not differ from typical interspecific mammalian allometries. In wild weasels, locomotor costs comprised roughly 5% of daily energy expenditures; this low value was primarily a result of short travel times and distances.
Karol Zub - One of the best experts on this subject based on the ideXlab platform.
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Phenotypic data (body mass and RMR) for multiple captures of weasels, Bialowieza Forest, Poland
2016Co-Authors: Karol Zub, Paulina A. Szafrańska, Stuart Piertney, Marek KonarzewskiAbstract:Phenotypic data (body mass and RMR) for multiple captures of weasels Mustela nivalis, Bialowieza Forest, Polan
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Microsatelite data of weasels, Bialowieza Forest, Poland
2016Co-Authors: Karol Zub, Paulina A. Szafrańska, Stuart Piertney, Marek KonarzewskiAbstract:Microsatelites data and mean phenotypic data (body mass and RMR) for weasels Mustela nivalis captured in Bialowieza Forest, Poland
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seasonal variation of resting metabolic rate and body mass in free living weasels Mustela nivalis
Physiological and Biochemical Zoology, 2013Co-Authors: Paulina A. Szafrańska, Karol Zub, Marek KonarzewskiAbstract:Metabolic rates and body mass of mammals vary seasonally along with ambient temperatures and food availability. At the population level, seasonal changes in metabolic rate and mass can be due to selective mortality or emigration of individuals whose metabolic rate or mass differs from the average for the population. Alternatively, the metabolic rates of individuals can change seasonally, such that the population average increases or decreases due to shifts in the physiology of the overall population. The latter implies that individuals respond in a similar manner to changing seasonal conditions. We studied seasonal changes in body mass (BM) and resting metabolic rate (RMR) in free-ranging male weasels (Mustela nivalis) to test the consistency of these traits in individuals caught in different seasons of the year. At the population level, BM was remarkably stable across the seasons (F(3, 124)=0.25, P=0.9). In contrast, BM- corrected RMR varied significantly between seasons and was the lowest in winter (F(3, 135)=9.13, P<0.0001). We demonstrated that individual weasels were consistent in how their BM and RMR deviated from the seasonal means for the population (intraclass correlation, τ=0.78 and 0.33, respectively). This variation among individuals explained ~76% and 27% of the total variation of BM and basal metabolic rate, respectively. Hence, the relatively constant BM at the population level across seasons is due to a relative constancy of BM in individuals. Our study is one of relatively few research projects that demonstrate that seasonal changes in RMR observed in the wild population are in part due to a consistency in individual responses to changing environmental conditions.
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Seasonal variation of resting metabolic rate and body mass in free-living weasels Mustela nivalis.
Physiological and Biochemical Zoology, 2013Co-Authors: Paulina A. Szafrańska, Karol Zub, Marek KonarzewskiAbstract:Metabolic rates and body mass of mammals vary seasonally along with ambient temperatures and food availability. At the population level, seasonal changes in metabolic rate and mass can be due to selective mortality or emigration of individuals whose metabolic rate or mass differs from the average for the population. Alternatively, the metabolic rates of individuals can change seasonally, such that the population average increases or decreases due to shifts in the physiology of the overall population. The latter implies that individuals respond in a similar manner to changing seasonal conditions. We studied seasonal changes in body mass (BM) and resting metabolic rate (RMR) in free-ranging male weasels (Mustela nivalis) to test the consistency of these traits in individuals caught in different seasons of the year. At the population level, BM was remarkably stable across the seasons (F(3, 124)=0.25, P=0.9). In contrast, BM- corrected RMR varied significantly between seasons and was the lowest in winter (F(3, 135)=9.13, P
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The energy cost of voluntary running in the weasel Mustela nivalis.
The Journal of experimental biology, 2012Co-Authors: Mark A Chappell, Karol Zub, Paulina A. Szafrańska, Marek KonarzewskiAbstract:The small size and elongate shape of weasels (Mustela nivalis) probably evolved to facilitate movement within the burrow systems of prey species, but result in high energy costs of thermoregulation. In this study we measured metabolic rates of weasels during voluntary locomotion to determine whether energy costs of transport are also high in these unusually shaped mammals. In addition, we measured the lower and upper limits of aerobic metabolism [resting metabolic rate (RMR) and maximal oxygen consumption in forced exercise (V(O(2),max))], and used the wide size range of adult weasels to investigate the intraspecific scaling of energy metabolism. Finally, we combined measurements of energy use during running with radiotracking and doubly labeled water data from free-living weasels to estimate the importance of locomotor costs in daily energy budgets. We found that weasels have higher than predicted costs of running, largely because of an elevated intercept of the speed versus metabolic rate relationship. Running costs were strongly affected by the approximately fourfold range of body size in adults. As reported in other studies, the RMR of weasels was considerably higher than predicted from body mass. Maximal oxygen consumption was also higher than predicted, but factorial aerobic scope (V(O(2),max)/RMR) was within the normal range for mammals. Intraspecific mass scaling of RMR and V(O(2),max) did not differ from typical interspecific mammalian allometries. In wild weasels, locomotor costs comprised roughly 5% of daily energy expenditures; this low value was primarily a result of short travel times and distances.
Paulina A. Szafrańska - One of the best experts on this subject based on the ideXlab platform.
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Phenotypic data (body mass and RMR) for multiple captures of weasels, Bialowieza Forest, Poland
2016Co-Authors: Karol Zub, Paulina A. Szafrańska, Stuart Piertney, Marek KonarzewskiAbstract:Phenotypic data (body mass and RMR) for multiple captures of weasels Mustela nivalis, Bialowieza Forest, Polan
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Microsatelite data of weasels, Bialowieza Forest, Poland
2016Co-Authors: Karol Zub, Paulina A. Szafrańska, Stuart Piertney, Marek KonarzewskiAbstract:Microsatelites data and mean phenotypic data (body mass and RMR) for weasels Mustela nivalis captured in Bialowieza Forest, Poland
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Seasonal variation of resting metabolic rate and body mass in free-living weasels Mustela nivalis.
Physiological and Biochemical Zoology, 2013Co-Authors: Paulina A. Szafrańska, Karol Zub, Marek KonarzewskiAbstract:Metabolic rates and body mass of mammals vary seasonally along with ambient temperatures and food availability. At the population level, seasonal changes in metabolic rate and mass can be due to selective mortality or emigration of individuals whose metabolic rate or mass differs from the average for the population. Alternatively, the metabolic rates of individuals can change seasonally, such that the population average increases or decreases due to shifts in the physiology of the overall population. The latter implies that individuals respond in a similar manner to changing seasonal conditions. We studied seasonal changes in body mass (BM) and resting metabolic rate (RMR) in free-ranging male weasels (Mustela nivalis) to test the consistency of these traits in individuals caught in different seasons of the year. At the population level, BM was remarkably stable across the seasons (F(3, 124)=0.25, P=0.9). In contrast, BM- corrected RMR varied significantly between seasons and was the lowest in winter (F(3, 135)=9.13, P
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seasonal variation of resting metabolic rate and body mass in free living weasels Mustela nivalis
Physiological and Biochemical Zoology, 2013Co-Authors: Paulina A. Szafrańska, Karol Zub, Marek KonarzewskiAbstract:Metabolic rates and body mass of mammals vary seasonally along with ambient temperatures and food availability. At the population level, seasonal changes in metabolic rate and mass can be due to selective mortality or emigration of individuals whose metabolic rate or mass differs from the average for the population. Alternatively, the metabolic rates of individuals can change seasonally, such that the population average increases or decreases due to shifts in the physiology of the overall population. The latter implies that individuals respond in a similar manner to changing seasonal conditions. We studied seasonal changes in body mass (BM) and resting metabolic rate (RMR) in free-ranging male weasels (Mustela nivalis) to test the consistency of these traits in individuals caught in different seasons of the year. At the population level, BM was remarkably stable across the seasons (F(3, 124)=0.25, P=0.9). In contrast, BM- corrected RMR varied significantly between seasons and was the lowest in winter (F(3, 135)=9.13, P<0.0001). We demonstrated that individual weasels were consistent in how their BM and RMR deviated from the seasonal means for the population (intraclass correlation, τ=0.78 and 0.33, respectively). This variation among individuals explained ~76% and 27% of the total variation of BM and basal metabolic rate, respectively. Hence, the relatively constant BM at the population level across seasons is due to a relative constancy of BM in individuals. Our study is one of relatively few research projects that demonstrate that seasonal changes in RMR observed in the wild population are in part due to a consistency in individual responses to changing environmental conditions.
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The energy cost of voluntary running in the weasel Mustela nivalis.
The Journal of experimental biology, 2012Co-Authors: Mark A Chappell, Karol Zub, Paulina A. Szafrańska, Marek KonarzewskiAbstract:The small size and elongate shape of weasels (Mustela nivalis) probably evolved to facilitate movement within the burrow systems of prey species, but result in high energy costs of thermoregulation. In this study we measured metabolic rates of weasels during voluntary locomotion to determine whether energy costs of transport are also high in these unusually shaped mammals. In addition, we measured the lower and upper limits of aerobic metabolism [resting metabolic rate (RMR) and maximal oxygen consumption in forced exercise (V(O(2),max))], and used the wide size range of adult weasels to investigate the intraspecific scaling of energy metabolism. Finally, we combined measurements of energy use during running with radiotracking and doubly labeled water data from free-living weasels to estimate the importance of locomotor costs in daily energy budgets. We found that weasels have higher than predicted costs of running, largely because of an elevated intercept of the speed versus metabolic rate relationship. Running costs were strongly affected by the approximately fourfold range of body size in adults. As reported in other studies, the RMR of weasels was considerably higher than predicted from body mass. Maximal oxygen consumption was also higher than predicted, but factorial aerobic scope (V(O(2),max)/RMR) was within the normal range for mammals. Intraspecific mass scaling of RMR and V(O(2),max) did not differ from typical interspecific mammalian allometries. In wild weasels, locomotor costs comprised roughly 5% of daily energy expenditures; this low value was primarily a result of short travel times and distances.
Patrick Giraudoux - One of the best experts on this subject based on the ideXlab platform.
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Do bromadiolone treatments to control grassland water voles (Arvicola scherman) affect small mustelid abundance?
Pest Management Science, 2019Co-Authors: Javier Fernandez-de-simon, Michael Coeurdassier, Geoffroy Couval, Isabelle Fourel, Patrick GiraudouxAbstract:The use of pesticides can affect non-target species by causing population declines through indirect intoxication. Small mustelids (SMs; weasels, Mustela nivalis L.; stoats, Mustela erminea L.) consume water voles (WVs, Arvicola scherman S.) and can be exposed to bromadiolone, an anticoagulant rodenticide used in some countries to reduce WV damage to grasslands. Here, we investigated whether bromadiolone affected SM abundance.
Juan José Luque-larena - One of the best experts on this subject based on the ideXlab platform.
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Body size and habitat use of the common weasel Mustela nivalis vulgaris in Mediterranean farmlands colonised by common voles Microtus arvalis
Mammal Research, 2019Co-Authors: Francois Mougeot, Beatriz Arroyo, Xavier Lambin, Juan José Luque-larenaAbstract:Small mustelids such as weasels are highly specialized predators of small rodents. Their diminutive size allows hunting for prey underground, but also means that they are “bite-sized” predators, preyed upon by other larger predators. Habitat use by weasels is therefore expected to depend not only on prey abundance, but also on predation risk. We report here on the body size and habitat use of common weasels Mustela nivalis vulgaris captured in intensive farmlands of northwest Spain during 2009–2015. We show that weasels’ capture rate was higher in field margins than in other habitats (cereal and alfalfa fields, fallows) irrespective of season. All small mammals (common vole, wood mouse, Algerian mouse, and greater white-toothed shrew) were consistently more frequently captured in field margins than other habitats. Weasel capture rate in each habitat was proportional to that of prey in these (alfalfa > fallows > cereal), except for field margins, which were used more intensively than expected from prey capture rate. Weasel capture rate was 37% lower in areas provided with nest boxes to increase local raptor abundance, a reduction that occurred in all habitats and was significant when correcting for prey capture rate. Weasel habitat use reflected a trade-off between prey abundance (bottom-up control) and predation risk (top-down control), with a preferential use of field margins that offer not only more prey but also permanent vegetation cover and protection from avian predators throughout most of the annual crop cycles. Weasel and vole head width data show that voles are not safe underground from smaller female weasels and that burrow entrances were wide enough for weasels to escape underground from predators. In NW Spain, common voles are a main farmland pest causing significant impacts. We discuss the implications of current vole control measures for weasels in areas recurrently affected by vole outbreaks.
