Special Scientific Report--Wildlife 183
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In our eReader you can find the full English version of the book. Read Special Scientific Report--Wildlife 183 Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Special Scientific Report--Wildlife 183
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The results indicated that wild mallards, pen-reared mallards, and pen- reared black ducks were equally susceptible to lead poisoning at the dosage level used. Mortality was 100% for all dosed groups except the drake pen- reared mallards which had 95% mortality (Table 10) . Four control ducks in this test, two wild mallards and two drake black ducks, died from causes tinrelated to lead poisoning. These control wild mallards were the poorest of the lot and stress factors related to their austere... diet of whole corn and the long-distance shipment may have caused their death. These findings, which contrast with those of Bellrose, could have been caused by different shot retention rates. Our birds retained most of their shot whereas data were unavailable for Bellrose 's tests. A difference in shot retention could appreciably affect the mortality rate of his mallards.
Toxicity of One Lead Shot, Size 4, among Mallards Jordan and Bellrose (1950) showed that the ingestion of a single lead pellet, size 6, would kill 60-80% of a group of captive wild mallard drakes.
What to read after Special Scientific Report--Wildlife 183?
You can find similar books in the "Read Also" column, or choose other free books by U.S. Fish And Wildlife Service to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The results indicated that wild mallards, pen-reared mallards, and pen- reared black ducks were equally susceptible to lead poisoning at the dosage level used. Mortality was 100% for all dosed groups except the drake pen- reared mallards which had 95% mortality (Table 10) . Four control ducks in this test, two wild mallards and two drake black ducks, died from causes tinrelated to lead poisoning. These control wild mallards were the poorest of the lot and stress factors related to their austere... diet of whole corn and the long-distance shipment may have caused their death. These findings, which contrast with those of Bellrose, could have been caused by different shot retention rates. Our birds retained most of their shot whereas data were unavailable for Bellrose 's tests. A difference in shot retention could appreciably affect the mortality rate of his mallards.
Toxicity of One Lead Shot, Size 4, among Mallards Jordan and Bellrose (1950) showed that the ingestion of a single lead pellet, size 6, would kill 60-80% of a group of captive wild mallard drakes.
What to read after Special Scientific Report--Wildlife 183?
You can find similar books in the "Read Also" column, or choose other free books by U.S. Fish And Wildlife Service to read onlineMoreLess
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