Results 241 to 250 of about 637,931 (281)
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Litter stimulus factors in maternal retrieval (Rattus rattus)
Animal Behaviour, 1973Abstract Maternal retrieval by rats was compared for sedated and control pups at 2, 5, 10, and 15 days of age. The control animals were retrieved more quickly than the experimentals only on day 5. The results were interpreted as demonstrating that stimuli of the pups determining maternal care have varying effects with age.
L, Smith, G, Berkson
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Feeding Patterns of Rattus rattus and Rattus exulans on Eniwetok Atoll, Marshall Islands
Journal of Mammalogy, 1971In conjunction with studies of the rodent populations of the former nuclear test site at Eniwetok Atoll, the feeding patterns of Rattus rattus and Rattus exulans were determined by food acceptance tests, histological examination of stomach contents, and observation of animals under both natural and cage conditions.
M W, Fall, A B, Medina, W B, Jackson
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Reproductive Parameters in Rattus rattus and Rattus exulans of Hawaii, 1968 to 1970
Journal of Mammalogy, 1972Reproductive parameters were assessed in populations of the roof rat ( Rattus rattus ) and the Polynesian rat ( Rattus exulans ) in Hawaii for 1 year as a step in understanding population regulation in these species. Populations of the roof rat undergo a yearly cycle in which density is highest and reproduction is lowest in the winter.
R H, Tamarin, S R, Malecha
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Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1971
Abstract The polypeptide chains separable from haemoglobins by means of chromatography on CM-cellulose were isolated and subjected to digestion with carboxypeptidases to determine their C-terminal amino acids. 1. 2. In comparison with the human C-terminal sequences it was possible to consider individual fractions for alpha-like or beta-like ...
R, Brdicka +3 more
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Abstract The polypeptide chains separable from haemoglobins by means of chromatography on CM-cellulose were isolated and subjected to digestion with carboxypeptidases to determine their C-terminal amino acids. 1. 2. In comparison with the human C-terminal sequences it was possible to consider individual fractions for alpha-like or beta-like ...
R, Brdicka +3 more
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Paracrystalline Hæmoglobin as a Species Difference between Rattus norvegicus and Rattus rattus
Nature, 1961THE common laboratory white rat is almost always the albino variety of the Norway rat (brown rat, Rattus norvegicus)1,2 and only exceptionally the albino variety of the black rat (Rattus rattus)3. The two species are morphologically similar, which makes it rather difficult to distinguish them.
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Rattus rattus Linnaeus, 1758 Roof Rat The invasive R. norvegicus possesses a statewide distribution and can be found in all 64 parishes.
Hoffman, Justin D. +3 more
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Hoffman, Justin D. +3 more
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Survey of Cardiovascular Pathology in Wild Urban Rattus norvegicus and Rattus rattus
Veterinary Pathology, 2014Norway ( Rattus norvegicus) and black rats ( Rattus rattus) are common commensal pests, yet little is known about the ecology of wild rats, including their natural diseases. We describe microscopic cardiovascular pathology in a subset of a sample of 725 wild urban rats.
J L, Rothenburger +3 more
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HERPESVIRUS INFECTION IN THE BLACK RAT (Rattus rattus)
Journal of Wildlife Diseases, 1973A condition characterized by hepatomegaly, splenomegaly and pulmonary echymoses was found in a wild black rat. The disease was successfully transmitted to laboratory rats and mice by intraperitoneal, intranasal and intracerebral inoculations. Microscopy indicated that the condition was probably caused by a herpesvirus.
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Leptospirosis in Rattus norvegicus and Rattus rattus in Israel.
Israel journal of medical sciences, 1982Leptospires were isolated from 21.2% of Rattus norvegicus (the brown rat) and 9.9% of Rattus rattus trapped in a survey of urban and rural areas in Israel. Microagglutination antibodies were found in sera of 9.4 and 8.1% of these rats, respectively. The 191 strains isolated belonged to six serogroups: Leptospira icterohaemorrhagiae (169), L.
I, Lindenbaum, E, Eylan
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