Bromadiolone is a second generation anticoagulant that is currently registered as a toxicant cont... more Bromadiolone is a second generation anticoagulant that is currently registered as a toxicant controlling commensal rodents. This laboratory study was conducted to provide us with preliminary information on the effectiveness and secondary hazards of bromadiolone as a prairie dog (Cynomys spp.) toxicant. We planned to use this information to decide on the appropriateness of pursuing field research projects using this compound. For an overview on bromadio-lone, see Poche (1986). This was the second laboratory study we conducted on alternative prairie dog toxicants. The first, on chlorophacinone, was reported earlier (Fisher and Timm 1988). Our desire was not to directly com-pare the effectiveness of bromadiolone to chlorophacinone, but to determine if we could find a safe and effective bait formula-tion that could be tested later in the field.
Biology and Natural History of the Nutria, With Special Reference to Nutria in Louisiana The nutr... more Biology and Natural History of the Nutria, With Special Reference to Nutria in Louisiana The nutria or coypu (Myocastor coypus) is a rodent native to South America that has been introduced almost worldwide since the early 1900’s, originally with the intent of fur farming in many cases. The nutria is a large (over 6 kg), semi-aquatic rodent with a voracious appetite and high reproductive potential. Nutria became established in the Louisiana wetlands in the 1930’s. The habitat proved to be ideal and populations exploded, reaching an estimated 20 million animals in less than 20 years. Trapping of nutria for their pelts formed the backbone of the Louisiana trapping industry from the 1960’s until the early 1980’s when prices for furs on the world market and in Louisiana fell drastically. Since then the annual trapping harvest, which was over one million animals per year for many years, has dwindled to 29,544 in the 2000-2001 season. Since the virtual cessation of the annual harvest, nutr...
ABSTRACT This study examines the potential reason why five hawks and one owl failed to die when e... more ABSTRACT This study examines the potential reason why five hawks and one owl failed to die when exposed to cholophacinone-killed voles as their only food source for six consecutive days. Recovery of chlorophacinone from a subsample of vole carcasses showed a reduction of 90 % of the active ingredient from that amount initially ingested. An additional reduction of 69 to 90 % was noted in the raptor carcasses after the birds were euthanasied at the end of the 34 day study. These date lead the researchers to believe that the small amounts of chlorophacinone retained by the voles at death are not sufficient to cause injury or death to the raptors.
Summary. Nocturnal movements of the lesser bandicoot rat (Bandicota bengalensis), the greater b... more Summary. Nocturnal movements of the lesser bandicoot rat (Bandicota bengalensis), the greater bandicoot rat (B, indica), and the roof rat (Rattus rattus) were monitored in Bangladesh using radio tracking techniques. Results indicated the lesser bandicoot rat is the most important ...
International Biodeterioration & Biodegradation, 2002
Six different concentrations of warfarin bait (0.0, 44.7, 89.5, 233.0, 407.0, and 777.6ppm) were ... more Six different concentrations of warfarin bait (0.0, 44.7, 89.5, 233.0, 407.0, and 777.6ppm) were fed for 15 days to black-tailed prairie dogs to determine efficacy. The resulting mortality was 0, 30, 50, 60, 100, and 80%, respectively. No difference in mortality was observed among the sexes. Differences in bait consumption were greater between the control group and all treatment groups
Bromadiolone is a second generation anticoagulant that is currently registered as a toxicant cont... more Bromadiolone is a second generation anticoagulant that is currently registered as a toxicant controlling commensal rodents. This laboratory study was conducted to provide us with preliminary information on the effectiveness and secondary hazards of bromadiolone as a prairie dog (Cynomys spp.) toxicant. We planned to use this information to decide on the appropriateness of pursuing field research projects using this compound. For an overview on bromadio-lone, see Poche (1986). This was the second laboratory study we conducted on alternative prairie dog toxicants. The first, on chlorophacinone, was reported earlier (Fisher and Timm 1988). Our desire was not to directly com-pare the effectiveness of bromadiolone to chlorophacinone, but to determine if we could find a safe and effective bait formula-tion that could be tested later in the field.
Biology and Natural History of the Nutria, With Special Reference to Nutria in Louisiana The nutr... more Biology and Natural History of the Nutria, With Special Reference to Nutria in Louisiana The nutria or coypu (Myocastor coypus) is a rodent native to South America that has been introduced almost worldwide since the early 1900’s, originally with the intent of fur farming in many cases. The nutria is a large (over 6 kg), semi-aquatic rodent with a voracious appetite and high reproductive potential. Nutria became established in the Louisiana wetlands in the 1930’s. The habitat proved to be ideal and populations exploded, reaching an estimated 20 million animals in less than 20 years. Trapping of nutria for their pelts formed the backbone of the Louisiana trapping industry from the 1960’s until the early 1980’s when prices for furs on the world market and in Louisiana fell drastically. Since then the annual trapping harvest, which was over one million animals per year for many years, has dwindled to 29,544 in the 2000-2001 season. Since the virtual cessation of the annual harvest, nutr...
ABSTRACT This study examines the potential reason why five hawks and one owl failed to die when e... more ABSTRACT This study examines the potential reason why five hawks and one owl failed to die when exposed to cholophacinone-killed voles as their only food source for six consecutive days. Recovery of chlorophacinone from a subsample of vole carcasses showed a reduction of 90 % of the active ingredient from that amount initially ingested. An additional reduction of 69 to 90 % was noted in the raptor carcasses after the birds were euthanasied at the end of the 34 day study. These date lead the researchers to believe that the small amounts of chlorophacinone retained by the voles at death are not sufficient to cause injury or death to the raptors.
Summary. Nocturnal movements of the lesser bandicoot rat (Bandicota bengalensis), the greater b... more Summary. Nocturnal movements of the lesser bandicoot rat (Bandicota bengalensis), the greater bandicoot rat (B, indica), and the roof rat (Rattus rattus) were monitored in Bangladesh using radio tracking techniques. Results indicated the lesser bandicoot rat is the most important ...
International Biodeterioration & Biodegradation, 2002
Six different concentrations of warfarin bait (0.0, 44.7, 89.5, 233.0, 407.0, and 777.6ppm) were ... more Six different concentrations of warfarin bait (0.0, 44.7, 89.5, 233.0, 407.0, and 777.6ppm) were fed for 15 days to black-tailed prairie dogs to determine efficacy. The resulting mortality was 0, 30, 50, 60, 100, and 80%, respectively. No difference in mortality was observed among the sexes. Differences in bait consumption were greater between the control group and all treatment groups
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