DISTRIBUTION OF THE HEPATIC BLOOD VESSELS OF THE GROUND SQUIRREL (SPERMOPHILUS CITELLUS)
نویسندگان
چکیده
منابع مشابه
Natural entrainment without dawn and dusk: the case of the European ground squirrel (Spermophilus citellus).
Observational data collected in the field and in enclosures show that diurnal, burrow-dwelling European ground squirrels (Spermophilus citellus) never were above ground during twilight at dawn or at dusk. The animals emerged on average 4.02 h (SD = 0.45) after civil twilight at dawn and retreated in their burrows on average 2.87 h (SD = 0.47) before civil twilight at dusk. Daily patterns of lig...
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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...
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Entrainment by nonphotic, activity-inducing stimuli has been investigated in detail in nocturnal rodents, but little is known about nonphotic entrainment in diurnal animals. Comparative studies would offer the opportunity to distinguish between two possibilities. (1) If nonphotic phase shifts depend on the phase of the activity cycle, the phase response curve (PRC) should be about 180 degrees o...
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Effects of hibernation on memory were tested in European ground squirrels (Spermophilus citellus). The animals were trained in summer to successfully accomplish two tasks: a spatial memory task in a maze and an operant task on a feeding machine. One group hibernated normally, and the other was prevented from hibernation by maintaining ambient temperature at 22 degrees C. In spring, the same tas...
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cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...
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ژورنال
عنوان ژورنال: ВЕТЕРИНАРСКИ ЖУРНАЛ РЕПУБЛИКЕ СРПСКЕ
سال: 2019
ISSN: 2303-4475,1840-2887
DOI: 10.7251/vetjen1901153b