Relevant bibliographies by topics / Frogs – Hibernation

Academic literature on the topic 'Frogs – Hibernation'

Author: Grafiati
Published: 4 June 2021
Last updated: 13 February 2022

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Journal articles on the topic "Frogs – Hibernation"

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Sato, Iwao, Kiyoshi Konishi, Masataka Sunohara, and Akiko Mikami. "Enzyme activities and morphology of Japanese brown frog (Rana japonica) mitochondria in the tibialis anterior muscle during hibernation and active life." Canadian Journal of Zoology 79, no. 7 (July 1, 2001): 1316–21. http://dx.doi.org/10.1139/z01-083.

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Enzyme activities in the respiratory chain, as well as the structure and numbers of mitochondria of the tibialis anterior muscle, during hibernation were compared with those of normally active muscle in the Japanese brown frog (Rana japonica). Morphological examination using an electron microscope showed that during hibernation, mitochondria were larger and longer and had clearly distinguishable outer and inner membranes with developed cristae. A significantly greater number of glycogen granules was found in the tibialis anterior muscle of hibernating frogs. The average cross-sectional area (CSA) of muscle fiber was much smaller in the samples from hibernating frogs than those from active frogs. The numbers of mitochondria per CSA were also much higher during hibernation than during active life. Measurements of the enzyme activities of succinate dehydrogenase, NADH-ferricyanide reductase, and succinate-O2 and NADH-O2 oxidoreductases showed different profiles between hibernation and active life. That is, all four activities were significantly higher during hibernation than during active life. Taken together, the results obtained suggest that the seasonal variations in the activities of respiratory-chain systems may be related to the seasonal morphological changes in muscle mitochondria in R. japonica.
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McInerney, Emma P., Aimee J. Silla, and Phillip G. Byrne. "Carotenoid supplementation affects the post-hibernation performance of southern corroboree frogs." Behaviour 157, no. 2 (February 6, 2020): 121–42. http://dx.doi.org/10.1163/1568539x-00003584.

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Abstract Many animals hibernate to survive winter conditions, however, arousal from hibernation generates reactive oxygen species (ROS) that can cause oxidative stress. Dietary antioxidants, like carotenoids, may reduce oxidative stress during arousal from hibernation, and assist with post-hibernation recovery and performance. We tested the effect of carotenoid supplementation on exercise performance (escape-response and activity) in southern corroboree frogs (Pseudophryne corroboree) following initial arousal from hibernation (24–48 h post-arousal) and post-recovery (six weeks post-hibernation). Carotenoids did not affect performance following initial arousal. However, carotenoids improved escape-response six weeks post-hibernation, with carotenoid-supplemented frogs hopping faster and further in their first hop than unsupplemented frogs. Carotenoids also affected post-recovery activity, with carotenoid-supplemented frogs being less mobile than unsupplemented frogs. Carotenoids may affect post-hibernation performance by reducing oxidative stress or by increasing diet quality. Our study provides novel evidence for an effect of carotenoids on performance post-hibernation and highlights the importance of nutrition to hibernating organisms.
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Tong, Qing, Xiao-peng Du, Zong-fu Hu, Li-yong Cui, and Hong-bin Wang. "Modelling the growth of the brown frog (Rana dybowskii)." PeerJ 6 (May 16, 2018): e4587. http://dx.doi.org/10.7717/peerj.4587.

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Well-controlled development leads to uniform body size and a better growth rate; therefore, the ability to determine the growth rate of frogs and their period of sexual maturity is essential for producing healthy, high-quality descendant frogs. To establish a working model that can best predict the growth performance of frogs, the present study examined the growth of one-year-old and two-year-old brown frogs (Rana dybowskii) from metamorphosis to hibernation (18 weeks) and out-hibernation to hibernation (20 weeks) under the same environmental conditions. Brown frog growth was studied and mathematically modelled using various nonlinear, linear, and polynomial functions. The model input values were statistically evaluated using parameters such as the Akaike’s information criterion. The body weight/size ratio (Kwl) and Fulton’s condition factor (K) were used to compare the weight and size of groups of frogs during the growth period. The results showed that the third- and fourth-order polynomial models provided the most consistent predictions of body weight for age 1 and age 2 brown frogs, respectively. Both the Gompertz and third-order polynomial models yielded similarly adequate results for the body size of age 1 brown frogs, while the Janoschek model produced a similarly adequate result for the body size of age 2 brown frogs. The Brody and Janoschek models yielded the highest and lowest estimates of asymptotic weight, respectively, for the body weights of all frogs. TheKwlvalue of all frogs increased from 0.40 to 3.18. TheKvalue of age 1 frogs decreased from 23.81 to 9.45 in the first four weeks. TheKvalue of age 2 frogs remained close to 10. Graphically, a sigmoidal trend was observed for body weight and body size with increasing age. The results of this study will be useful not only for amphibian research but also for frog farming management strategies and decisions.
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Irwin, Jason T., Jon P. Costanzo, and Richard E. Lee, Jr. "Terrestrial hibernation in the northern cricket frog, Acris crepitans." Canadian Journal of Zoology 77, no. 8 (November 1, 1999): 1240–46. http://dx.doi.org/10.1139/z99-087.

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We used laboratory experiments and field observations to explore overwintering in the northern cricket frog, Acris crepitans, in southern Ohio and Indiana. Cricket frogs died within 24 h when submerged in simulated pond water that was anoxic or hypoxic, but lived 8-10 days when the water was oxygenated initially. Habitat selection experiments indicated that cricket frogs prefer a soil substrate to water as temperature decreases from 8 to 2°C. These data suggested that cricket frogs hibernate terrestrially. However, unlike sympatric hylids, this species does not tolerate extensive freezing: only 2 of 15 individuals survived freezing in the -0.8 to -2.6°C range (duration 24-96 h). Cricket frogs supercooled when dry (mean supercooling point -5.5°C; range from -4.3 to -6.8°C), but were easily inoculated by external ice at temperatures between -0.5 and -0.8°C. Our data suggested that cricket frogs hibernate terrestrially but are not freeze tolerant, are not fossorial, and are incapable of supercooling in the presence of external ice. Thus we hypothesized that cricket frogs must hibernate in terrestrial sites that adequately protect against freezing. Indeed, midwinter surveys revealed cricket frogs hibernating in crayfish burrows and cracks of the pond bank, where wet soils buffered against extensive freezing of the soil.
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Boutilier, Robert G., and Julie St-Pierre. "Adaptive plasticity of skeletal muscle energetics in hibernating frogs:mitochondrial proton leak during metabolic depression." Journal of Experimental Biology 205, no. 15 (August 1, 2002): 2287–96. http://dx.doi.org/10.1242/jeb.205.15.2287.

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SUMMARYThe common frog (Rana temporaria) spends the coldest months of each year overwintering in ice-covered ponds where temperatures can vary from 0.5 to 4.0°C. Over the course of a winter season, the animals enter progressively into a state of metabolic depression that relies almost exclusively on aerobic production of ATP. However, if aerobic metabolism is threatened, for example by increasingly hypoxic conditions, decreases in the animal's metabolic rate can reach upwards of 75% compared with the 50%decrease seen during normoxia. Under these conditions, the major proportion of the overall reduction in whole-animal metabolic rate can be accounted for by metabolic suppression of the skeletal muscle (which makes up approximately 40%of body mass). Little is known about the properties of mitochondria during prolonged periods of metabolic depression, so we have examined several aspects of mitochondrial metabolism in the skeletal muscle of frogs over periods of hibernation of up to 4 months. Mitochondria isolated from the skeletal muscle of frogs hibernating in hypoxic water show a considerable reorganisation of function compared with those isolated from normoxic submerged animals at the same temperature (3°C). Both the active (state 3) and resting (state 4)respiration rates of mitochondria decrease during hypoxic, but not normoxic,hibernation. In addition, the affinity of mitochondria for oxygen increases during periods of acute hypoxic stress during normoxic hibernation as well as during long-term hibernation in hypoxic water. The decrease in mitochondrial state 4 respiration rates during hypoxic hibernation evidently occurs through a reduction in electron-transport chain activity, not through a lowered proton conductance of the mitochondrial inner membrane. The reduced aerobic capacity of frog skeletal muscle during hypoxic hibernation is accompanied by lowered activities of key enzymes of mitochondrial metabolism caused by changes in the intrinsic properties of the mitochondria. In the absence of oxygen, the mitochondrial F1Fo-ATPase (the ATP synthase) begins to run backwards as it actively pumps protons from the matrix in an attempt to maintain the mitochondrial membrane potential. At this time, the ATP synthase functions as an ATPase to preserve a certain proton-motive force. Frogs limit ATP wastage during anoxia by a profound inhibition of the ATP synthase. Taken together, our studies show that protonmotive force is lowered aerobically by restricting electron supply and during anoxia by restricting mitochondrial ATPase activity.
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Donohoe, Paul H., Timothy G. West, and Robert G. Boutilier. "Respiratory, metabolic, and acid-base correlates of aerobic metabolic rate reduction in overwintering frogs." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 274, no. 3 (March 1, 1998): R704—R710. http://dx.doi.org/10.1152/ajpregu.1998.274.3.r704.

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Aerobic metabolic rates (M˙o 2) and respiratory quotients (RQ = CO2production/M˙o 2) were measured contemporaneously in hibernating frogs Rana temporaria (L.), submerged for 90 days at 3°C. After 3 mo of submergence in fully aerated water,M˙o 2levels were 61% of those seen at the same temperature before hibernation. Over the first 40 days of hibernation, RQ values (≤0.82) favored a lipid-based metabolism that progressively shifted to an exclusively carbohydrate metabolism (RQ = 1.01) by 90 days of hibernation. Liver glycogen concentrations fell by 68% during the first 8 wk of submergence, thereafter exhibiting a less rapid rate of utilization. Conversely, muscle glycogen concentrations remained stable over the first 2 mo of the experiment before falling by 33% over the course of the remaining 2 mo, indicating that the frog was recruiting muscle glycogen reserves to fuel metabolism. Submerged frogs exhibited an extracellular acidosis during the first week of submergence, but over the course of the next 15 wk “extracellular pH” values were not significantly different from the values obtained from the control air-breathing animals. The initial extracellular acidosis was not mirrored in the intracellular compartment, and the acid-base state was not significantly different from the control values for the first 8 wk. However, over the subsequent 8- to 16-wk period, the acid-base status shifted to a lower intracellular pH-[Formula: see text] concentration set point, indicative of a metabolic acidosis. Even so, there was no indication that the acidosis could be attributed to anaerobic metabolism, as both plasma and muscle lactate levels remained low and stable. Muscle adenylate energy charge and lactate-to-pyruvate and creatine-to-phosphocreatine ratios also remained unchanged throughout hibernation. The capacity for profound metabolic rate suppression together with the ability to match substrate use to shifts in aerobic metabolic demands and the ability to fix new acid-base homeostatic set points are highly adaptive, both in terms of survival and reproductive success, to an animal that is often forced to overwinter under the cover of ice.
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Dinsmore, Steve C., and David L. Swanson. "Temporal patterns of tissue glycogen, glucose, and glycogen phosphorylase activity prior to hibernation in freeze-tolerant chorus frogs, Pseudacris triseriata." Canadian Journal of Zoology 86, no. 10 (October 2008): 1095–100. http://dx.doi.org/10.1139/z08-088.

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Freezing survival may differ among winters in chorus frogs ( Pseudacris triseriata (Wied-Neuwied, 1838)), and low freezing survival is associated with low hepatic glycogen stores. The pattern of prehibernation liver glycogen accumulation in chorus frogs is unknown. Frogs might accumulate hepatic glycogen stores until a threshold level sufficient for winter survival is attained, after which frogs enter hibernation (critical threshold hypothesis). According to this model, frogs active late in the season should only be those with low hepatic glycogen stores. Alternatively, hepatic glycogen levels might continue to increase throughout the fall as long as frogs remain active (continuous increase hypothesis). We tested these hypotheses by measuring liver and leg muscle glycogen, glucose, and glycogen phosphorylase activities in chorus frogs throughout the fall prehibernation period in southeastern South Dakota. Hepatic glycogen levels were significantly related to date and increased throughout the fall period, consistent with the continuous increase hypothesis. This suggests that hepatic glycogen levels do not serve as a cue for entrance into hibernation. Liver phosphorylase activity did not vary significantly with progression of the fall season and activity was lower than in winter, suggesting that the winter increment of phosphorylase activity requires some stimulus during hibernation (e.g., low temperatures).
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St-Pierre, J., M. D. Brand, and R. G. Boutilier. "The effect of metabolic depression on proton leak rate in mitochondria from hibernating frogs." Journal of Experimental Biology 203, no. 9 (May 1, 2000): 1469–76. http://dx.doi.org/10.1242/jeb.203.9.1469.

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Futile cycling of protons across the mitochondrial inner membrane accounts for 20 % or more of the total standard metabolic rate of a rat. Approximately 15 % of this total is due to proton leakage inside the skeletal muscle alone. This study examined whether the rate of proton leak is down-regulated as a part of a coordinated response to energy conservation during metabolic depression in cold-submerged frogs. We compared the proton leak rate of skeletal muscle mitochondria isolated from frogs at different stages of hibernation (control, 1 month and 4 months of submergence in normoxia and hypoxia). The kinetics of mitochondrial proton leak rate was unaltered throughout normoxic and hypoxic submergence. The state 4 respiration rates did not differ between control animals and frogs hibernating in normoxia. In contrast, the state 4 respiration rates obtained from frogs submerged in hypoxic water for 4 months were half those of control animals. This 50 % reduction in respiration rate in hypoxic hibernation was due to a reduction in electron transport chain activity and consequent decrease in mitochondrial membrane potential. We conclude that proton leak rate is reduced during metabolic depression as a secondary result of a decrease in electron transport chain activity, but that the proton conductance is unchanged. In addition, we show that the rate of proton leakage and the activity of the electron transport chain are lower in frogs than in rats, strengthening the observation that mitochondria from ectotherms have a lower proton conductance than mitochondria from endotherms.
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Akulenko, N. M. "Pecular Features of Hematopoiesis in the Liver of Mature and Immature Green Frogs (Pelophylax Esculentus Complex)." Vestnik Zoologii 50, no. 6 (December 1, 2016): 547–52. http://dx.doi.org/10.1515/vzoo-2016-0062.

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Abstract The article describes characteristic features of the hematopoiesis in mature and immature green frogs (Pelophylax esculentus complex). Quantitative differences in liver myelograms were insignificant. However, in a sample of mature animals numerous significant correlations between the number of pigment inclusions in the liver and indicators of erythropoiesis and myelopoiesis were observed. Those correlations were absent in the immature frogs. We concluded that aft er the frogs’ breeding a lack of plastic resources, in particular, hemosiderin remains up to the hibernation.
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Berger, W. Andrew, and Leszek Berger. "Progeny of water frog populations in central Poland." Amphibia-Reptilia 13, no. 2 (1992): 135–46. http://dx.doi.org/10.1163/156853892x00328.

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AbstractThe authors discuss progenies of 18 watcr frog populations. Individuals with esculenta phenotype which arc hybridogenetic hybrids between Rana ridibunda and Rana lessonae are the most numerous frogs among the adults and progeny. Esculenta tadpoles began and finished their metamorphosis mostly as first, and in progeny with esculenta phenotype there were more females than males. In pure esculenta population most of progeny belonged to ridibunda phenotype and female sex. The froglets caught in August were larger on an average than those in October or after hibernation.
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Dissertations / Theses on the topic "Frogs – Hibernation"

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Word, James Mabry. "Physiological adjustments to aestivation and activity in the cocoon-forming frogs Cyclorana platycephala and Cyclorana maini." University of Western Australia. School of Animal Biology, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0254.

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The desert-adapted frogs Cyclorana platycephala and Cyclorana maini survive long periods of inhospitably hot and dry conditions by retreating underground and aestivating. While aestivating they suspend food and water intake as well as physical activity, depress their metabolic rate by ~80 %, and form cocoons that protect them against desiccation. How these frogs function during this exceptional state is largely unknown. This work characterized a number of physiological parameters in three metabolic states spanning their natural metabolic range: during aestivation (depressed metabolism), at rest (normal metabolism), and where possible, during exercise (elevated metabolism). The primary objective was to identify by comparison, physiological adjustments in these parameters to metabolic depression, as well as the scope of these parameters in frogs capable of aestivation. The parameters measured for C. maini were (a) the glucose transport kinetics and (b) the fluid balance of an extensive number of their individual organs. For C. platycephala, the parameters measured were (a) the activity of the cardiovascular system as indicated by heart rate and blood pressure and (b) the roles of pulmonary and cutaneous respiratory systems in gas exchange
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Donohoe, Paul Hugh. "Factors effecting metabolic rate reduction during hibernation in the frog, Rana temporaria." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627309.

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Bethany, Williams. "Nitric oxide metabolites in hypoxia, freezing, and hibernation of the wood frog, Rana sylvatica." Miami University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=miami1525202133341325.

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Muir, Timothy J. "OSMOTIC AND METABOLIC RESPONSES TO DEHYDRATION AND UREA-LOADING IN A TERRESTRIALLY-HIBERNATING FROG." Miami University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=miami1182977656.

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Schade, Peggy Lee Carleton University Dissertation Chemistry. "Glycogen degradation by alpha-glucosidase from a hibernating ground squirrel, Spermophilus lateralis, and a freeze tolerant frog, Rana sylvatica." Ottawa, 1996.

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Jacobsson, Madeleine. "Dr. Eleine Mad." Thesis, Kungl. Konsthögskolan, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kkh:diva-587.

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Dr. Eleine Mad är Madeleine Jacobsssons talesperson för dom vetenskapliga och paranormala upptäckter som uppstår i hennes världar. Hon beskriver innehåll, teknik och estetik utifrån ett kategoriseringssytem där konsten delas upp som olika typer av komponenter och därefter avkodas dessa allteftersom. För att förstå intuitionens inblandning i arbetsprocessen omförvandlas den till tre separata roller av en Sökare, Samlare och Myntare. Med rollerna försöker jag beskriva på vilka sätt som intuitionen är till gagn eller av förödelse för det konstnärliga arbetet. Sagan om M handlar om en grodlik karaktär, Delop, som lämnar sin hemplanet för att uppsöka andra världar. I sitt sökande hittar Delop ett folkslag vars syn och levnadssätt skiljer sig från hennes erfarenheter av “verkligheten” såsom hon lärt sig att överleva i den.
Dr. Eleine Mad is Madeleine Jacobsson's spokesperson for the scientific and paranormal discoveries that arise in her worlds. She describes content, tecniques and aesthetics based on a categorization system where art is divided into different types of components and then decoded as they go. To understand the intuition's involvement in the work process, it is transformed into three separate roles by a Seeker, Collector and a Myntare(In swedish language the one who is a "myntare" -is verbally declaring a concept or term). With these roles I try to describe in what ways intuition is beneficial or devastating to the artistic work. The story of M is about a frog-like character, Delop, who leaves the home planet to seek out other worlds. In her search, Delop finds a world whose views and lifestyles differ from her experiences of "reality" as she learned to survive in it.

Recorded sound and image material of the presentation is available for private use.

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BANAS, JEFFREY ALAN. "THE IMPLICATIONS OF HIBERNATION ON HOST-BACTERIAL INTERACTIONS WITHIN THE LARGE INTESTINE OF THE LEOPARD FROG, RANA PIPIENS." 1987. http://catalog.hathitrust.org/api/volumes/oclc/68299140.html.

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Books on the topic "Frogs – Hibernation"

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ill, Boldt Mike, ed. I don't want to go to sleep. New York: Knopf Doubleday Publishing Group, 2018.

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Las ranas de la madera. New York, New York: Bearport Publishing, 2015.

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Markovics, Joyce L. Wood Frogs. Bearport Publishing Company, Incorporated, 2015.

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Lindeen, Mary. Frozen Frogs and Other Amazing Hibernators. Lerner Publishing Group, 2017.

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Lindeen, Mary. Frozen Frogs and Other Amazing Hibernators. Lerner Publishing Group, 2017.

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Lindeen, Mary. Frozen Frogs and Other Amazing Hibernators. Lerner Publishing Group, 2017.

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Frozen Frogs and Other Amazing Hibernators. Lerner Publishing Group, 2017.

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Lindeen, Mary. Frozen Frogs and Other Amazing Hibernators. Lerner Publishing Group, 2017.

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I Don't Want to Go to Sleep. Doubleday Books for Young Readers, 2018.

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