Comparative temperature regulation of African and European shrew

Rate of metabolism during lactation in small terrestrial mammals (Crocidura russula, Mus domesticus and Microtus arvalis)

“…The average basal rate of metabolism obtained in this study for C. russula (Table 1) is only slightly lower than the value published by Sparti (1990) on shrews of the same population (106% vs. 116% of predicted by the Kleiber equation). Part of the slight difference may be due to seasonal variation in both rate of metabolism and body mass, since Sparti (1990) measured wintering shrews which were on average slightly lighter (10.4 g).…”

Rate of metabolism during lactation in small terrestrial mammals (Crocidura russula, Mus domesticus and Microtus arvalis)

“…The average basal rate of metabolism obtained in this study for C. russula (Table 1) is only slightly lower than the value published by Sparti (1990) on shrews of the same population (106% vs. 116% of predicted by the Kleiber equation). Part of the slight difference may be due to seasonal variation in both rate of metabolism and body mass, since Sparti (1990) measured wintering shrews which were on average slightly lighter (10.4 g).…”

South African mouse shrews (Myosorex) feel the heat: using species distribution models (SDMs) and IUCN Red List criteria to flag extinction risks due to climate change

“…Due to their small body size and high metabolic rate, shrews have a high heat load resulting in high metabolic costs of evaporative cooling at high ambient temperatures, as well as reduced starvation resistance. While tropical or arid-adapted shrews may adapt to higher ambient temperatures by having higher body temperatures or a lower basal metabolic rate (BMR), such adaptations are not found in temperate shrews (Brown et al 1997;Sparti 1990). For a temperate-montane species like M. varius, ambient temperatures above 28°C appear to exceed the physiological tolerance of the species, possibly due to excessive water losses required for evaporative cooling.…”

Molecular phylogenetics reveals Messinian, Pliocene, and Pleistocene colonizations of islands by North African shrews

“…However, in contrast to the temperate red-toothed shrews (subfamily Soricinae), the white-toothed shrews (subfamily Crocidurinae) have a rather moderate metabolism. Moreover, they are able to reduce the energy expenditure by torpor during low food availability (Nagel, 1977), especially shrews from desert environment (Sparti, 1990), increasing the probability of a successful transfer. Different to reptiles that dispersed to most of the volcanic islands by rafting (Juan et al, 2000), the shrew remained in the complex of eastern islands Fuerteventura, Lanzarote, Lobos, and Montana Clara that were certainly connected during low sea levels, a fact that is in agreement with the lower probability of a rafting success.…”

Rate of metabolism during lactation in small terrestrial mammals (Crocidura russula, Mus domesticus and Microtus arvalis)

“…The average basal rate of metabolism obtained in this study for C. russula (Table 1) is only slightly lower than the value published by Sparti (1990) on shrews of the same population (106% vs. 116% of predicted by the Kleiber equation). Part of the slight difference may be due to seasonal variation in both rate of metabolism and body mass, since Sparti (1990) measured wintering shrews which were on average slightly lighter (10.4 g).…”

South African mouse shrews (Myosorex) feel the heat: using species distribution models (SDMs) and IUCN Red List criteria to flag extinction risks due to climate change

“…Due to their small body size and high metabolic rate, shrews have a high heat load resulting in high metabolic costs of evaporative cooling at high ambient temperatures, as well as reduced starvation resistance. While tropical or arid-adapted shrews may adapt to higher ambient temperatures by having higher body temperatures or a lower basal metabolic rate (BMR), such adaptations are not found in temperate shrews (Brown et al 1997;Sparti 1990). For a temperate-montane species like M. varius, ambient temperatures above 28°C appear to exceed the physiological tolerance of the species, possibly due to excessive water losses required for evaporative cooling.…”

Molecular phylogenetics reveals Messinian, Pliocene, and Pleistocene colonizations of islands by North African shrews

“…However, in contrast to the temperate red-toothed shrews (subfamily Soricinae), the white-toothed shrews (subfamily Crocidurinae) have a rather moderate metabolism. Moreover, they are able to reduce the energy expenditure by torpor during low food availability (Nagel, 1977), especially shrews from desert environment (Sparti, 1990), increasing the probability of a successful transfer. Different to reptiles that dispersed to most of the volcanic islands by rafting (Juan et al, 2000), the shrew remained in the complex of eastern islands Fuerteventura, Lanzarote, Lobos, and Montana Clara that were certainly connected during low sea levels, a fact that is in agreement with the lower probability of a rafting success.…”

Rate of metabolism during lactation in small terrestrial mammals (Crocidura russula, Mus domesticus and Microtus arvalis)

“…The average basal rate of metabolism obtained in this study for C. russula (Table 1) is only slightly lower than the value published by Sparti (1990) on shrews of the same population (106% vs. 116% of predicted by the Kleiber equation). Part of the slight difference may be due to seasonal variation in both rate of metabolism and body mass, since Sparti (1990) measured wintering shrews which were on average slightly lighter (10.4 g).…”

South African mouse shrews (Myosorex) feel the heat: using species distribution models (SDMs) and IUCN Red List criteria to flag extinction risks due to climate change

“…Due to their small body size and high metabolic rate, shrews have a high heat load resulting in high metabolic costs of evaporative cooling at high ambient temperatures, as well as reduced starvation resistance. While tropical or arid-adapted shrews may adapt to higher ambient temperatures by having higher body temperatures or a lower basal metabolic rate (BMR), such adaptations are not found in temperate shrews (Brown et al 1997;Sparti 1990). For a temperate-montane species like M. varius, ambient temperatures above 28°C appear to exceed the physiological tolerance of the species, possibly due to excessive water losses required for evaporative cooling.…”

Molecular phylogenetics reveals Messinian, Pliocene, and Pleistocene colonizations of islands by North African shrews

“…However, in contrast to the temperate red-toothed shrews (subfamily Soricinae), the white-toothed shrews (subfamily Crocidurinae) have a rather moderate metabolism. Moreover, they are able to reduce the energy expenditure by torpor during low food availability (Nagel, 1977), especially shrews from desert environment (Sparti, 1990), increasing the probability of a successful transfer. Different to reptiles that dispersed to most of the volcanic islands by rafting (Juan et al, 2000), the shrew remained in the complex of eastern islands Fuerteventura, Lanzarote, Lobos, and Montana Clara that were certainly connected during low sea levels, a fact that is in agreement with the lower probability of a rafting success.…”