(1) Our campus squirrel population provides ample opportunities to explore squirrel feeding preferences or scatterhoarding behaviors. Many of the findings summarized in a series of papers by Steele and Smallwood (e.g., “What are squirrels hiding? Natural History 10: 40-44. 1994. and other findings reported in their articles) offer challenging field experiment ideas. For example, given that spec...

In Britain, the population of native red squirrels Sciurus vulgaris has suffered population declines and local extinctions. Interspecific resource competition and disease spread by the invasive gray squirrel Sciurus carolinensis are the main factors behind the decline. Gray squirrels have adapted to the British landscape so efficiently that they are widely distributed. Knowledge on how gray squ...

Regional cerebral ischemia was produced by common carotid artery occlusion in gerbils and by middle cerebral artery occlusion in dogs, cats, and squirrel monkeys. Anesthesia was induced with either pentobarbital or halothane and maintained for two to three hours after vessel occlusion. In acute studies, the effect of regional cerebral ischemia on cerebral concentrations of ATP, phosphocreatine,...

This study reports on the molecular phylogenetics of ground squirrels, genus Spermophilus, in Turkey using cytochrome b (1140bp), part of the D-loop and flanking tRNAs (572bp), X chromosome (867-1051bp) and Y chromosome (983-989bp) DNA sequences. Individuals also were characterized by karyotype and with geometric morphometric analyses of mandibles and skulls. Two hundred fourteen individuals fr...

Squirrel monkeys (Saimiri sciureus) inoculated intratracheally with 10(4.2)-10(8.2) egg median infectious doses (EID50) of type A influenza virus (H3N2) responded with clinical illness including such signs as fever, sneezing or coughing, coryza, and increased respiratory rates. Necropsy studies performed six days after inoculation revealed bronchopneumonia in addition to a mild tracheitis. Squi...

It was earlier proposed that the polymorphism of color vision observed in some neotropical monkeys could be accounted for by assuming that these animals have only a single photopigment gene locus on the X-chromosome. Three kinds of evidence have been added to existing data sets in an effort to evaluate the adequacy of the single locus model: (1) photopigment complements of squirrel monkeys (Sai...

This paper presents a new rotor flux estimation method for sensorless vector controlled squirrel-cage induction generators used in wind power applications. The proposed method is based on a phase-locked loop (PLL) and the orthogonality between the rotor flux space vector and its back electromotive force (EMF) space vector. Rotor flux is estimated using stator voltage equations without integrati...

Ground squirrel retinas contain a relatively small complement of rods (5--10% of all photoreceptors) which are thought to provide the basis for a weak scotopic visual capacity. In a previous investigation of the California ground squirrel (Spermophilus beecheyi) involving the recording of a retinal gross potential, the electroretinogram (ERG), electrophysiological evidence for a viable scotopic...

A longitudinal study on the effects of age on the susceptibility to motion sickness in the squirrel monkey was carried out over a 10-year period (1982 to 1991). The typical life span of squirrel monkeys is 15 years. Ten mature male squirrel monkeys of the Bolivian subspecies were found to be susceptible to motion sickness induced by a combination of vertical oscillation at 0.5 Hz and rotation i...

First record of the Long-snouted Bhutan Squirrel Dremomys lokriah bhotia (Wroughton, 1916) (Mammalia: Rodentia) from state West Bengal, India