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of animals from a caribou (Rangifer tarandus) mortality event that occurred in Alaska, in the area of Point Hope and Cape Thompson (including the Chariot site), in 1995. These were compared to results from hunter-killed caribou from reference sites (Barrow and Teshekpuk Lake, Alaska) and from the ar...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.487.5872 2023-05-15T14:19:44+02:00 ARCTIC The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.487.5872 http://pubs.aina.ucalgary.ca/arctic/Arctic56-2-125.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.487.5872 http://pubs.aina.ucalgary.ca/arctic/Arctic56-2-125.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.aina.ucalgary.ca/arctic/Arctic56-2-125.pdf Key words Alaska caribou heavy metals Rangifer tarandus starvation RÉSUMÉ. On a text ftciteseerx 2016-01-08T08:16:51Z of animals from a caribou (Rangifer tarandus) mortality event that occurred in Alaska, in the area of Point Hope and Cape Thompson (including the Chariot site), in 1995. These were compared to results from hunter-killed caribou from reference sites (Barrow and Teshekpuk Lake, Alaska) and from the area of a mine (Red Dog Mine) to determine whether heavy metals had played a role in the mortality event or whether any elements were at concentrations of concern for human consumers. Starvation and malnutrition were major factors leading to death or severe weakness, as very little or no fat (very low body condition scores) and serous atrophy of fat (observed as watery contents of the marrow cavity, with no apparent fat, and histologically) were more prevalent in caribou associated with the mortality event than in hunter-killed animals from reference sites. Accumulation of hepatic (liver) hemosiderin in Kupffer cells (macrophages) was noted as an indicator of cachexia. Concentrations of lead in feces and liver, copper in the rumen contents, and arsenic in muscle were higher in caribou harvested near Red Dog Mine, as might be expected in that mineral-rich area, but were not at levels of concern for toxicoses. Kidney concentrations of cadmium, which increased significantly with increasing age, present a potential concern for human consumers, and this is an expected finding. We concluded that caribou had starved and that heavy metals had played no role in the mortality event. Further investigation of regional mineral differences is required to understand the sources and transport mechanisms that explain these findings and to properly address mining activity. Mortality events on the north slope of Alaska are common and likely involve starvation as described here, but in most cases they are not investigated, even though recent industrial activities have heightened concern among some local Text Arctic Arctic Barrow north slope Rangifer tarandus Alaska Unknown Arctic Point Hope ENVELOPE(173.306,173.306,52.911,52.911) |
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English |
topic |
Key words Alaska caribou heavy metals Rangifer tarandus starvation RÉSUMÉ. On a |
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Key words Alaska caribou heavy metals Rangifer tarandus starvation RÉSUMÉ. On a ARCTIC |
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Key words Alaska caribou heavy metals Rangifer tarandus starvation RÉSUMÉ. On a |
description |
of animals from a caribou (Rangifer tarandus) mortality event that occurred in Alaska, in the area of Point Hope and Cape Thompson (including the Chariot site), in 1995. These were compared to results from hunter-killed caribou from reference sites (Barrow and Teshekpuk Lake, Alaska) and from the area of a mine (Red Dog Mine) to determine whether heavy metals had played a role in the mortality event or whether any elements were at concentrations of concern for human consumers. Starvation and malnutrition were major factors leading to death or severe weakness, as very little or no fat (very low body condition scores) and serous atrophy of fat (observed as watery contents of the marrow cavity, with no apparent fat, and histologically) were more prevalent in caribou associated with the mortality event than in hunter-killed animals from reference sites. Accumulation of hepatic (liver) hemosiderin in Kupffer cells (macrophages) was noted as an indicator of cachexia. Concentrations of lead in feces and liver, copper in the rumen contents, and arsenic in muscle were higher in caribou harvested near Red Dog Mine, as might be expected in that mineral-rich area, but were not at levels of concern for toxicoses. Kidney concentrations of cadmium, which increased significantly with increasing age, present a potential concern for human consumers, and this is an expected finding. We concluded that caribou had starved and that heavy metals had played no role in the mortality event. Further investigation of regional mineral differences is required to understand the sources and transport mechanisms that explain these findings and to properly address mining activity. Mortality events on the north slope of Alaska are common and likely involve starvation as described here, but in most cases they are not investigated, even though recent industrial activities have heightened concern among some local |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
title |
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ARCTIC |
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arctic |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.487.5872 http://pubs.aina.ucalgary.ca/arctic/Arctic56-2-125.pdf |
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ENVELOPE(173.306,173.306,52.911,52.911) |
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Arctic Point Hope |
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Arctic Point Hope |
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Arctic Arctic Barrow north slope Rangifer tarandus Alaska |
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Arctic Arctic Barrow north slope Rangifer tarandus Alaska |
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http://pubs.aina.ucalgary.ca/arctic/Arctic56-2-125.pdf |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.487.5872 http://pubs.aina.ucalgary.ca/arctic/Arctic56-2-125.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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