A microfilaria (Microfilaria rosenaui n. sp.) from the California ground squirrel (Citellus beecheyi)

Ectoparasites of the ground squirrel (Citellus citellus (L.)) in Turkey.

A total of 100 ground squirrels, Citellus (C.) citellus were trapped in rural regions of Konya in order to determine the presence of ectoparasites. Of these C. citellus examined, 16% (16/100) were infected with at least one ectoparasite species. Two types of ectoparasites were found including 10% fleas and 7% ticks. Only two flea species were found on C. citellus including Nosopsyllus fasciatus...

Retinal neurons of the California ground squirrel, Spermophilus beecheyi: a Golgi study.

Although the optic nerve fibers of the cone-dominant ground squirrel retina have been well studied physiologically, the morphological details of the retinal neurons have not. To that end, retinal neurons of the California ground squirrel have been studied in Golgi-impregnated wholemounts. Two types of horizontal cell have been identified: H1 has an axon and axon terminal, whereas H2 is axonless...

The distributions of photoreceptors and ganglion cells in the California ground squirrel, Spermophilus beecheyi.

The topographical distributions of photoreceptors and ganglion cells of the California ground squirrel (Spermophilus beecheyi) were quantified in a light microscopic study. The central retina contains broad, horizontal streaks of high photoreceptor density (40-44,000/mm2) and high ganglion cell density (20-24,000/mm2). The isodensity contours of both cell types are elliptical and oriented along...

The Foraging Behavior of Free-ranging Rattlesnakes (Crotalus oreganus) in California Ground Squirrel (Otospermophilus beecheyi) Colonies

Foraging is a key aspect of a species’ ecology and decisions made while foraging affect fitness in many ways. Although much research has focused on snake foraging, only a handful of detailed studies have been conducted on free-ranging individuals, all on Crotalus horridus. We used fixed videography to collect data on free-ranging Northern Pacific Rattlesnake (Crotalus oreganus) behavior to qual...

The Adult of Microfilaria Malayi Brug, 1927