96 research outputs found
First Michigan Specimens of \u3ci\u3eLibellula Vibrans\u3c/i\u3e Fabricius (Odonata: Libellulidae)
Libellula vibrans Fabricius (Odonata: Libellulidae) is a large dragonfly previously known in Michigan only from sight or literature records. In 2005, two small populations were found in Wayne County, Michigan
\u3ci\u3eArchilestes Grandis\u3c/i\u3e (Rambur) (Odonata: Lestidae): New for Michigan
Archilestes grandis (Rambur) (Odonata: Lestidae) is a large lestid damselfly previously unknown from Michigan. A population was found in 2005 in Wayne County, Michigan
Macromia alleghaniensis (Odonata: Macromiidae): New For Michigan, with Clarifications of Northern Records
An Alleghany River Cruiser, Macromia alleghaniensis Williamson (Odonata: Macromiidae), collected in Cass County, Michigan on 18 June 2014, represents the first record of the species for the state, as well as the northernmost unequivocal record in North America. Other records north of 40° latitude are clarified and discussed
\u3ci\u3eTramea Calverti\u3c/i\u3e (Odonata: Libellulidae): New for Michigan With Notes on Other New Reports for the Great Lakes Region
Beginning in late summer 2010, the Neotropical dragonfly Tramea calverti Muttkowski, striped saddlebags, was observed in a major northward movement in eastern North America. This species appeared for the first time in three Great Lakes states and Canada (Ontario). A specimen from Michigan is the first and only voucher in the Great Lakes, and an observation in Minnesota established a new northernmost report for North America
\u3ci\u3eErythrodiplax Umbrata\u3c/i\u3e (Odonata: Libellulidae): New for Michigan
Two band-winged dragonlets, Erythrodiplax umbrata (Linnaeus), collected in Wayne County, Michigan on 6 October 2007 represent the first records for this genus and species in the state, as well as the northernmost record for the species. They were found during a period in which many individuals were seen or photographed in Ohio, which prior to 2006, had only two records
Isodontia Elegans Now in Michigan (Hymenoptera: Sphecidae: Sphecinae)
Isodontia elegans (Smith) (Hymenoptera: Sphecidae), one of the “grass- carrying wasps,” previously known only from the western U.S., is now reported from southeastern Michigan, and appears to have spread across the eastern half of the United States in a relatively short period
First Michigan Specimens of \u3ci\u3eLibellula Vibrans\u3c/i\u3e Fabricius (Odonata: Libellulidae)
Libellula vibrans Fabricius (Odonata: Libellulidae) is a large dragonfly previously known in Michigan only from sight or literature records. In 2005, two small populations were found in Wayne County, Michigan
\u3ci\u3eCordulegaster erronea \u3c/i\u3e Hagen in Sels (Tiger Spiketail) Rediscovered in Michigan (Odonata: Cordulegastridae)
Cordulegaster erronea Hagen in Selys (Tiger Spiketail) has been included on the list of Michigan Odonata based on one specimen collected in 1934. In 2016, the species was found in Kalamazoo County, Michigan. It is the least abundant Cordulegaster species in Michigan, and the habitat requirements in Michigan are compared with known C. erronea habitats in Ohio and New Jerse
Isodontia Elegans Now in Michigan (Hymenoptera: Sphecidae: Sphecinae)
Isodontia elegans (Smith) (Hymenoptera: Sphecidae), one of the “grass- carrying wasps,” previously known only from the western U.S., is now reported from southeastern Michigan, and appears to have spread across the eastern half of the United States in a relatively short period
The use of d -amphetamine pellet implantation as a model for d -amphetamine tolerance in the mouse
The use of d -amphetamine pellet implantation as a method for producing rapid central drug tolerance was investigated. Mice were implanted with d -amphetamine pellets containing 2 mg of drug and were challenged 24 h later, a time when no detectable drug was present, with various doses of d -amphetamine i.p. Implantation was found to potentiate the stereotyped activity and produced tolerance to the exploratory activity induced by d -amphetamine. Daily pellet implantation for 3 days was not found to produce tolerance to the stereotyped activities. Animals administered a single pellet showed no difference in the brain disposition or metabolism of a subsequent dose of 3 H- d -amphetamine. Twenty-four hour pellet implantation markedly increased the rate of conversion of 3 H-tyrosine to 3 H-dopamine (330%) and 3 H-norepinephrine (61%) in the subcortex. However, this effect was reversed by the administration of 10 mg/kg of d -amphetamine.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/46386/1/213_2004_Article_BF00422869.pd
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