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Results for “Rodent Control”

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At least 109 records · Page 6Linked to original sources
PubMed1995

Laboratory evaluation of bait base for the control of Indian field mouse, Mus booduga (Gray).

Species specific bait evaluation is important for the successful control of rodent populations through rodenticides. Experiments were conducted on the bait preference of Indian field mouse, M. booduga. Results reveal that rice normal grain, rice cracked grain, rice +4% coconut oil and millet +2% coconut oil may be used as effective poison carriers for the Indian field mouse. Additives like oil, sugar and salt did not improve the palatability of bait materials.

Animals↗
PubMedDate not supplied

Thallium loading in owls and other birds of prey in Denmark.

Due to previous findings of increased concentrations of the rodenticid, thallium, in free-living Danish carnivores, thallium analysis has been carried out on material from 77 owls and birds of prey. Thallium was found in 2/3 of the birds and in 10% the concentration was so high that the load of thallium may have caused the death of the birds. The load of thallium in birds of prey was lower than concentrations found in carnivores, probably because poisoning caused by direct intake of thallium baits placed for rodent control does not seem to occur among birds of prey. From the investigation of this limited number of birds, it is not possible to tell if thallium did have any influence on the maintenance of a healthy population of birds of prey, but the large number of thallium loaded birds also justify the restrictions in the sue of thallium which were given from the 1st of July, 1975.

Animals↗
PubMed1991

The effect of unsaturated and saturated dietary lipids on the pattern of daily torpor and the fatty acid composition of tissues and membranes of the deer mouse Peromyscus maniculatus.

Dietary lipids strongly influence the pattern of torpor and the body lipid composition of mammalian hibernators. The object of the present study was to investigate whether these diet-induced physiological and biochemical changes also occur in species that show shallow, daily torpor. Deer mice, Peromyscus maniculatus, were fed with rodent chow (control diet) or rodent chow with either 10% sunflower seed oil (unsaturated diet) or 10% sheep fat (saturated diet). Animals on the unsaturated diet showed a greater occurrence of torpor (80-100% vs 26-43%), longer torpor bouts (4.5 vs 2.25 h), a lower metabolic rate during torpor (0.96 vs 2.25 ml O2.g-1.h-1), and a smaller loss of body mass during withdrawal of food (2.35 vs 3.90 g) than animals on the saturated diet; controls were intermediate. These diet-induced physiological changes were associated with significant alterations in the fatty acid composition of depot fat, leg muscle and brain total lipids, and heart mitochondrial phospholipids. Significant differences in the total unsaturated fatty acid (UFA) content between animals on saturated and unsaturated diet were observed in depot fat (55.7% vs 81.1%) and leg muscle (56.4% vs 72.1%). Major compositional differences between diet groups also occurred in the concentration of n6 and/or n3 fatty acids of brain and heart mitochondria. The study suggests that dietary lipids may play an important role in the seasonal adjustment of physiology in heterothermic mammals.

Adipose Tissue↗
PubMed1992

Ecoepidemiology of leishmaniases in Syria. 3. Leishmania major infection in Psammomys obesus provides clues to life history of the rodent and possible control measures.

Collections of Psammomys obesus from near Damascus, Syria in May 1990 and November 1991 contained animals of all ages. Both series had a high prevalence of Leishmania major infection. Lesions were small in November and large in May. Assuming the two collections were representative of typical years, it is inferred that the breeding season is between October and May: there is high winter mortality of animals born early in the breeding season, but high survival of their parents, and there is high mortality in summer of animals aged between 17 and around 20 months. Transmission in summer is, therefore, between old adults shortly before their death and young adults born in late winter or spring. Juvenile animals are not exposed to the infection. If these findings are confirmed it should be relatively easy to break this tenuous cycle.

Animals↗
PubMed1990

[Derivative spectroscopy and its use in sanitary hygiene control].

An analytical method is developed for defining the residual quantities of rodenticide "Brodifacoum" (talon) used in the control of harmful field rodents and especially for species Microtus. The method is based on extracting the pesticide with chloroform and making use of spectrophotometry in the ultraviolet field in intervals 340-240 nm. The second derivative of the absorption is utilized as well as the band with maximum 288 nm and minimum 228 nm. The peak height in this interval is in proportion to the concentration of the brodifacoum. When analysing residual waters, reservoirs, and soil the elimination of impeding substances is performed by thin-layer chromatography. The "cis" and "trans" form of brodifacoum is jointly determined by spectrophotometry. At thin-layer chromatography processing the two forms are separated. Sensitivity of the method 0.5 microgram/cm3 (in chloroform solution). Reproduction (as coefficient of variation) 5%. A thin-layer chromatographic method is recommended for semiquantitative determination of brodifacoum.

4-Hydroxycoumarins↗
PubMedDate not supplied

Effects of alpha-chlorohydrin on the reproductive organs of the male bandicoot rat (Bandicota bengalensis).

The present study was undertaken to determine the effects of alpha-chlorohydrin at a dosage of 50, 100 or 150 mg/kg body weight and were killed 2 or 10 days later. alpha-chlorohydrin at employed dose levels induced selective damage to the germinal epithelium which seemed to be confined to one "cycle" only. No permanent epididymal lesions were observed in any of the treated bandicoots even following a toxic dose of the drug. Administration of this compound at a dose level of 50 or 100 mg/kg also had no effect on the weight of the testis or sex accessory organs or fructose levels in coagulating glands when compared to controls. These data indicate that the alpha-chlorohydrin possibly acts directly on the testis without influencing the normal endocrine status of the animal.

Animals↗