Scholarly Commons @ MU
Browsing Lee, Richard by Title
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Adaptations of frogs to survive freezing
Five species of frogs from North America survive extensive freezing of their body fluids to temperatures as low as -8C for periods lasting at least 2 weeks. These frogs hibernate in leaf litter where subzero temperatures ... -
Anatomic site of application of ice-nucleating active bacteria affects supercooling in the Colorado potato beetle (Coleoptera: Chrysomelidae)
Most overwintering insects do not survive internal freezing and must avoid low temperatures or enhance the capacity of their body fluids to supercool to survive low temperature exposure. Recent reports have demonstrated ... -
Brief chilling to subzero temperature increases cold hardiness in the hatchling painted turtle (Chrysemys picta)
Although many studies of ectothermic vertebrates have documented compensatory changes in cold hardiness associated with changes of season, much less attention has been paid to adjustment of physiological functions and ... -
Carrion - It's what's for dinner: Wolves reduce the impact of climate change.
Humans have viewed wolves as competitors, threats to personal safety, and symbols of evil throughout history. By the early part of the 20th century, grey wolves (Canis lupus) had been eradicated from 42% of their historic ... -
Cold hardiness and overwintering strategies of hatchlings in an assemblage of northern turtles.
Field and laboratory studies were conducted during 1989-1994 to investigate the overwintering strategies of hatching turtles representing four families native to western Nebraska. Whereas hatchling snapping turtles (Chelydra ... -
Cold-hardiness and evaporative water loss in hatchling turtles.
North American turtles hatch in late summer and spend their first winter either on land or underwater. Adaptations for terrestrial overwintering of hatchlings in northern regions, where winter thermal and hydric regimes ... -
Cold-hardiness in the Antarctic tick, Ixodes uriae.
Ixodes uriae White (Ixodidae, Acarina) is the predominant tick on the Antarctic peninsula.This species has a circumpolar distribution in both hemispheres and is associated with or known to parasitize 48 species of seabirds. ... -
Cold-hardiness of a laboratory colony of lone star ticks.
The cold-hardiness of a lone star tick, Ambylomma americium (L.) laboratory colony was characterized. Fed and unfed larvae, fed and unfed nymphs, and unfed adults did not survive exposure to -17C for 7 d. After an 8-d ... -
Cold-shock injury and rapid cold-hardening in the flesh fly, Sarcophaga crassipalpis.
Direct exposure to -10 C, in the absence of tissue freezing, causes high mortality in Sarcophaga crassipalpis: this result suggests that injury is due to cold shock. However, brief acclimation at 0 C enables larvae, ... -
Compact genome of the Antarctic midge is likely an adaptation to an extreme environment
The midge, Belgica antarctica, is the only insect endemic to Antarctica, and thus it offers a powerful model for probing responses to extreme temperatures, freeze tolerance, dehydration, osmotic stress, ultraviolet radiation ... -
Cryobiology of the freeze-tolerant gall fly Eurosta solidaginis: Overwintering energetics and heat shock proteins.
The goldenrod gall fly Eurosta solidaginis (Diptera: Tehritidae) ranges from the southern U.S. northward into Canada. The larvae overwinters with a ball gall on the stem of goldenrod Solidago spa. The galls often extend ... -
Cryobiology of the freeze-tolerent gall fly Eurosta solidaginis: overwintering energetics and heat shock proteins
The goldenrod gall fly E urosta solidaginis (Diptera: Tephritidae) ranges from the southern us. northward into Canada. The larva overwinters within a ball gall on the stem of goldenrod Solidago spp. The galls often extend ... -
Cryoprotectants and extreme freeze tolerance in a subarctic population of the wood frog.
Wood frogs (Rana sylvatica) exhibit marked geographic variation in freeze tolerance, with subarctic populations tolerating experimental freezing to temperatures at least 10-13 degrees Celsius below the lethal limits for ... -
Do bot flies, Cuterebra (Diptera: Cuterebridae), emasculate their hosts?
Asa Fitch, in his description of a new species of Cuterebra that he named, "emasculator," was the first to suggest that bot flies castrated their mammalian hosts. In recent years several major review papers and parasitology ... -
Enzymatic regulation of glycogenolysis in a subarctic population of the wood frog: implications for extreme freeze tolerance
The wood frog, Rana sylvatica, from Interior Alaska survives freezing at –16°C, a temperature 10–13°C below that tolerated by its southern conspecifics. We investigated the hepatic freezing response in this northern phenotype ... -
Freezing impairment of male reproductive behaviors of the freeze-tolerant wood frog, Rana sylvatica.
The wood frog (Rana sylvatica), a temperate-zone anuran that overwinters within the frost zone, is adapted to tolerate the freezing and thawing of its tissues. Because the effects of freezing on complex neurobehavioral ... -
Ice nucleating active bacteria reduce the cold-hardiness of the freeze-intolerant Colorado potato beetle (Coleoptera: Chrysomelidae).
In laboratory experiments, a freeze-dried concentrated form of the icenucleating active bacteria, Pseudomonas syringae, was used to decrease the supercooling capacity of field-collected diapausing Colorado potato beetles, ... -
Ice nuclei in soil compromise cold hardiness of hatchling painted turtles, Chrysemys picta.
Hatchling painted turtles (Chrysemys picta) commonly overwinter within their natal nests and survive exposure to temperatures as low as -12 degrees C by supercooling. We report that the supercooling capacity of hatchling ... -
Ice-nucleating active bacteria decrease the cold-hardiness of stored grain insects.
This report provides further evidence that a freeze-dried, concentrated form of Pseudomonas syringae, an ice-nucleating active bacteria, reduces the cold tolerance of stored grain insect pests. Application of ice-nucleating ... -
Identification and expression of a putative facilitative urea transporter in three species of true frogs (Ranidae): implications for terrestrial adaptation.
Urea transporters (UTs) help mediate the transmembrane movement of urea and therefore are likely important in amphibian osmoregulation. Although UTs contribute to urea reabsorption in anuran excretory organs, little is ...