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Effects Of Two (Diptera: Culicidae) Mosquito Control Agents On Growth And Reproduction Of Red-Winged Blackbirds (Agelaius Phoeniceus), Joann M. Hanowski, Gerald J. Niemi, Ann R. Lima, Ronald R. Regal Jan 1997

Effects Of Two (Diptera: Culicidae) Mosquito Control Agents On Growth And Reproduction Of Red-Winged Blackbirds (Agelaius Phoeniceus), Joann M. Hanowski, Gerald J. Niemi, Ann R. Lima, Ronald R. Regal

Journal of the Minnesota Academy of Science

We compared red-winged blackbird (Agelaius phoeniceus) reproductive success and nestling growth in 1988 in 10 wetland site treated with methoprene and 10 sites treated with Bacillus thuringiensis israelensis (Bti) to 30 sites that had never received any mosquito (Diptera: culicidae) control treatment. No differences were detected between reference and treatment sites for clutch size, egg volume, growth rates, or fledge weight. The probability that an egg survived to the nestling stage was greater in methoprene-treated than reference sites. No other differences were detected among sites for reproductive success estimated using the Mayfield method. We conclude that treatment of the wetlands …

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Between A Rock And A Hard Place: Opuntia Fragilis (Nutt.) Haw. (Cactaceae) In Stearns County, Minnesota, Eric Ribbens, Jeremy Myrom Jan 1997

Between A Rock And A Hard Place: Opuntia Fragilis (Nutt.) Haw. (Cactaceae) In Stearns County, Minnesota, Eric Ribbens, Jeremy Myrom

Journal of the Minnesota Academy of Science

We surveyed the distribution of Opuntia fragilis ( Nutt.) Haw. in Steam County, MN, where it is restricted to a few rock outcrops. To compare the populations within three sites, we mapped clusters of pads and measured each individual pad within each cluster. Pads tended to be located in a narrow band of shallow soil between the bare rock and the angiosperm-dominated plant communities growing on adjacent deeper soils. Significant differences existed between the three populations in pad widths, average pad cluster sizes, and pad appearances. Although several pads flowered, none of the flower set seed, indicating that persistence of …

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Radiant Rewarming For Hypothermia: Pilot Canine Study Model, Linda M. Shecterle, John A. St. Cyr Jan 1997

Radiant Rewarming For Hypothermia: Pilot Canine Study Model, Linda M. Shecterle, John A. St. Cyr

Journal of the Minnesota Academy of Science

The purpose of this feasibility study was to determine if a radiant heat device could be used to rewarm hypothermic canines. Twenty canines were first cooled to varying degrees of hypothermia and then rewarmed. An ice water bath was used to create mild (> 32' C), moderate (29 to 32' C), or severe ( < 29· C) hypothermia, as assessed by measuring the animal's core body temperature. Two radiant heat devices, an IAD450 animal device or a thermal recovery unit (TRU), suitable for humans, were used for rewarming animals. There were no deaths or lasting significant complications during the treatment or follow up interval. Rewarming rates were: mild- 2.2· C during the first hour and 4.9' C during the second hour, moderate- 2.1" C during the first hour and 5.5' C during the second hour, or severe- 0.8' C during the first hour and 4.4' C during the second hour and 4.1' C during the third hour. Rewarming rates were comparable in either mild or moderate hypothermic conditions, however, in the severely hypothermic state, a slower rate of rewarming occurred during the first hour. Both devices proved capable of rewarming animals within acceptable time frames with no lasting clinically significant toxicity. Data accumulated and monitoring done during this study included: complete blood count, serum chemistries, blood gases, physiological hemodynamic parameters, and multiple temperature site assessment. This technique should be further explored as an alternative method of rewarming from a hypothermic to a normothermic state.

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Contributed Papers Jan 1997