HEALTH EFFECTS FOLLOWING CHRONIC DOSING WITH TUNGSTEN-IRON AND TUNGSTEN-POLYMER SHOT IN ADULT GAME-FARM MALLARDS
| Autor: | Steve Bursian, R. L. Stickle, Robert J. Tempelman, Richard J. Aulerich, Scott D. Fitzgerald, W. Stevens, D. C. Powell, R. R. Mitchell, R. J. Balander |
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| Rok vydání: | 2001 |
| Předmět: |
Male
Anas Veterinary medicine Polymers Iron Positive control Biology Kidney Body weight Drug Administration Schedule Tungsten Random Allocation Alloys Animals Caprolactam Dosing Ecology Evolution Behavior and Systematics Organ weight Ecology Bird Diseases Poisoning Body Weight Organ Size equipment and supplies biology.organism_classification Lead Poisoning Ducks Liver Steel Shot (pellet) Fish Female Bismuth Reproductive effects |
| Zdroj: | Journal of Wildlife Diseases. 37:451-458 |
| ISSN: | 0090-3558 |
| DOI: | 10.7589/0090-3558-37.3.451 |
| Popis: | Permanent approval of shot composed of tungsten-iron and tungsten-polymer for waterfowl hunting by the U.S. Fish and Wildlife Service was pending the results of the present study that examined the health and reproductive effects of the two shot types on mallards (Anas platyrhynchos) over a 150-day period. We collected data pertaining to the effects of tungsten- iron and tungsten-polymer shot on mortality, body weight, organ weight, tissue pathology, and shot erosion. Thirty-two bird groups (sexes equal) of adult mallards were dosed orally with eight #4 steel shot (control), eight #4 tungsten-iron shot, or eight #4 tungsten-polymer shot on days 0, 30, 60, 90, and 120 of a 150-day trial (26 January 1998 to 25 June 1998). An additional 12 mallards (sexes equal) were dosed orally with eight #4 lead shot (positive control) on day 0 of the study. All lead-dosed ducks died by day 25, whereas no ducks died in the other treatment groups. Significant liver hemosiderosis was present in all control and tungsten-iron-dosed males, in five of eight control and three of eight tungsten-iron-dosed females, and in one tungsten-polymer- dosed male examined. The rate of shot erosion was highest for tungsten-polymer shot (99%), followed by tungsten-iron (72%), and steel (55%) shot. Tungsten-iron or tungsten-polymer shot repeatedly administered to adult mallards did not have deleterious health effects during the 150- day trial based on mortality, body weights, organ weights, and histology of the liver and kidneys. |
| Databáze: | OpenAIRE |
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