scholarly journals Study of Some Hematological Parameters in Offpring of Heperlipidemic Female Laboratory Rats After Slmvastatln Treatment During Lactation

2020 ◽  
Keyword(s):  
Hematological Parameters ◽  
Laboratory Rats ◽  
Female Laboratory

Longitudinal Melatonin Production in Female Laboratory Rats During 1997-2006: Possible Modulatory Effects of Changing Solar Activity

2013 ◽  
Vol 5 (3) ◽  
pp. 186-194 ◽  
Author(s):  
Hella Bartsch ◽  
Dieter Mecke ◽  
Hansgeorg Probst ◽  
Heinz Kupper ◽  
Eckhard Seebald ◽  
...  
Keyword(s):  
Solar Activity ◽  
Laboratory Rats ◽  
Melatonin Production ◽  
Female Laboratory

scholarly journals Behavioral responses to physical vs. social novelty in male and female laboratory rats

2011 ◽  
Vol 88 (1) ◽  
pp. 56-59 ◽  
Author(s):  
Sonia A. Cavigelli ◽  
Kerry C. Michael ◽  
Sheila G. West ◽  
Laura Cousino Klein
Keyword(s):  
Behavioral Responses ◽  
Male And Female ◽  
Laboratory Rats ◽  
Female Laboratory

scholarly journals Differential responses by urban brown rats (Rattus norvegicus) toward male or female-produced scents in sheltered and high-risk presentations

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Michael H Parsons ◽  
Michael A Deutsch ◽  
Dani Dumitriu ◽  
Jason Munshi-South
Keyword(s):  
Wildlife Management ◽  
Radio Frequency Identification ◽  
Rattus Norvegicus ◽  
Day Treatment ◽  
Laboratory Rats ◽  
Frequency Identification ◽  
Wild Rats ◽  
Basic And Applied Research ◽  
Null Response ◽  
Female Laboratory

Abstract Wild rats (Rattus norvegicus) are among the most ubiquitous and consequential organisms in the urban environment. However, collecting data from city rats is difficult, and there has been little research to determine the influence, or valence, of rat scents on urban conspecifics. Using a mark-release-monitor protocol, we previously learned rats can be attracted to remote-sensing points when baited with mixed-bedding from male and female laboratory rats. It was thus essential that we disambiguate which scents were eliciting attraction (+ valence), inspection, a conditioned response whereby attraction may be followed by avoidance (–valence), or null-response (0 valence). We used radio-frequency identification tagging and scent-baited antennas to assess extended (>40 days) responses to either male or female scents against two risk presentations (near-shelter and exposed to predators). In response to male scents, rats (n = 8) visited both treatments (shelter, exposed) more than controls (0.2 visits/day treatment vs. 0.1/day; P < 0.05) indicating scents accounted for response more so than risk. Dwell-times, however, did not differ (1.2 s/visit treatment vs. 0.9 s/visit; P > 0.5). These outcomes are consistent with inspection (–valence). In response to female scents, rats (n = 7) increased visitation (5.02 visits/day vs. 0.1/day controls; P < 0.05), while dwell-times also increased 6.8 s/visit vs. 0.2 s/visit in both risk-settings. The latter is consistent with persistent attraction (+valence), but was also influenced by shelter, as runway visits (1.1 visits/day) were a magnitude more common than predator-exposed (0.1 visits/day). Further understanding and exploiting the mobility of city rats is necessary for improvements in basic and applied research, including city pathogen-surveillance and urban wildlife management.

Respiratory adaptations in burrowing pocket gophers from sea level and high altitude

1976 ◽  
Vol 41 (2) ◽  
pp. 168-173 ◽  
Author(s):  
A. J. Lechner
Keyword(s):  
High Altitude ◽  
Hematological Parameters ◽  
Hemoglobin Concentration ◽  
Additional Stress ◽  
Pocket Gopher ◽  
Total Acid ◽  
Pocket Gophers ◽  
Laboratory Rats ◽  
Thomomys Bottae ◽  
Buffer Value

To examine the adaptations to low O2 and high CO2 among fossorial and nonfossorial rodents, hematological parameters were determined for laboratory rats, the valley pocket gopher (Thomomys bottae) from 250 m, and the mountain pocket gopher (T. umbrinus melanotis) from 3150 m. Hematocrit, hemoglobin concentration, and O2 capacity were higher in pocket gophers than in rats. Blood PO2 at 50% saturation and pH 7.4 was 33 mmHg for both gophers and 39 mmHg for rats. Bohr factors for all three rodents were similar (-0.55 to -0.61) but buffer value, delta log PCO2/delta pH, was -2.54 for T. umbrinus, -1.97 for T. bottae, and -0.98 for Rattus. Concentrations of total acid-soluble phosphates were 50–75% higher in gophers than in rats, while bicarbonate values were within the normal mammalian range. All three rodents had similar myoglobin concentrations in cardiac muscle. Myoglobin concentrations were significantly higher in skeletal muscles (diaphragm, gastrocnemius) of T. umbrinus when compared to T. bottae, and significantly higher in both gophers when compared to rats. These differences may constitute important adaptations to the hypoxia and hypercapnia in burrows; certain of these factors in pocket gophers respond to the additional stress of high altitude hypoxia.

scholarly journals Гематологічні показники та морфологічна характеристика селезінки самок щурів f1 за дії наногерманію цитрату, застосованого у різних дозах

2017 ◽  
Vol 19 (77) ◽  
pp. 45-50
Author(s):  
G. Kotsjumbas ◽  
U. Tesarivska ◽  
M. Humenetska ◽  
M. Shumska
Keyword(s):  
Aqueous Solution ◽  
Marked Decrease ◽  
Hematological Parameters ◽  
Structural Disorder ◽  
Female Rats ◽  
White Pulp ◽  
Histological Changes ◽  
Group V ◽  
Laboratory Rats ◽  
Different Doses

The article presents results of drinking by female rats the water contained different doses of nanogermanium citrate (NGeC). Studies performed on laboratory rats females F1, divided into 5 groups: I – control, II group – aqueous solution of citric acid at a dose 50 µg; III – 10µg Ge; IV – 20µg Ge; V – 200 µg of Ge per kg of body weight. Defined hematological parameters, weight and index mass and histological changes in spleen. From blood leucogram was еstablished that rats from group II, III and IV had incresed the amount of neutrophils and eosinophils. Animals Group V biased marked decrease of lymphocytes and eosinophils, certain decrease of monocytes and increase of neutrophils. Index mass of spleen biased increased in animals IV and V groups. Prolonged drink to female rats aqueous solution of NGeC at a dose of 10 µg/kg promoted the growth of number cells of white pulp and the formation lymph nodes with reactive centers. This indicates an active limphopoetic function of spleen. But a dose of 200 µg/kg – led to structural disorder that manifested hyperemia, edema, easing trabecular content and reduced lymphocytes, macrophages and microphages of white pulp. This points to the dysfunction lymphocytopoiesis.

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