Scholarly Commons @ MU
Browsing Lee, Richard by Issue Date
Now showing items 1-20 of 32
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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 ... -
Low temperature acclimation in the desert spider, Agelenopsis aperta.
Agelenopsis aperta (Gertsch) inhabits desert grasslands and lava beds in the southwestern U.S.A. The capacity of this species to cold-harden was assessed by exposing second generation laboratory- reared specimens to an ... -
Inoculative freezing and the problem of winter survival for freshwater macroinvertebrates
Due to the thermal buffering of their environment, aquatic invertebrates are less likely than their terrestrial counterparts to face temperatures substantially below 0°C. Aquatic invertebrates may not be able to avoid ... -
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-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, ... -
Using microrespirometers to measure oxygen consumption by insects and small invertebrates.
A variety of physiological studies require the measurement of oxygen consumption. Unfortunately, the techniques for measuring respiration rate often require expensive equipment or difficult procedures that are not available ... -
Topical application of ice-nucleating-active bacteria decreases insect cold tolerance
The majority of overwintering insects avoid lethal freezing by lowering the temperature at which ice spontaneously nucleates within their body fluids. We examined the effect of ice-nucleating-active bacteria on the ... -
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 ... -
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 ... -
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 ... -
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 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 ... -
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, ... -
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 ... -
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 ... -
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 ... -
Surviving the big chill: overwintering strategies of aquatic and terrestrial insects.
The purpose of this paper is to describe the cold-hardiness of aquatic insects and to use the literature to compare physiological and behavioral strategies that aquatic and terrestrial insects use to cope with minimum ... -
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 ... -
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 ...