scholarly journals Copper Deficiency in Tule Elk at Point Reyes, California

1989 ◽  
Vol 42 (3) ◽  
pp. 233 ◽  
Author(s):  
Peter J. P. Gogan ◽  
David. A. Jessup ◽  
Mark Akeson
Author(s):  
Laura Alice Watt ◽  
David Lowenthal

This chapter chronicles how the PRNS has continued to steer management toward the national park ideal of scenic wild-yet-managed nature, despite giving more attention to cultural resources, as well as making official statements about the value of the area's ranching history. This can particularly be seen playing out in the Seashore's natural resource projects and plans since 1995. Moreover, these efforts to create a more wild and natural landscape have often come at the expense of the working ranches. This trend is most clearly reflected in the reintroduction of tule elk to Point Reyes, which have spread onto the pastoral zone and are now threatening the long-term viability of several historic ranches. The NPS's lack of action to counter the effects of free-ranging elk on ranch operations seems based in idealizations of both wilderness and wild animals as requiring hands-off management.


Author(s):  
Laura Alice Watt ◽  
David Lowenthal
Keyword(s):  

This chapter recounts the application of wilderness ideals to the Point Reyes landscape in the 1970s, which further defined the landscape and exacerbated the tension between preservation and use at the Seashore. The first is an August 1976 resolution identifying Point Reyes as a possible location for reintroduction of tule elk. It was then followed by the designation of a wilderness area across roughly one-third of the peninsula. These two pieces of legislation emphasizing the wild characteristics of Point Reyes were soon followed by a third congressional act, in 1978, creating a leasing mechanism for the working ranches to continue operating past the original terms of their reservations of use. Together, these three laws framed PRNS as a landscape where Congress had given deliberate sanction to both its wilder aspects and the continuity of agriculture.


2002 ◽  
Vol 66 (2) ◽  
pp. 478 ◽  
Author(s):  
Judd A. Howell ◽  
George C. Brooks ◽  
Marcia Semenoff-Irving ◽  
Correigh Greene

Author(s):  
U. Bielenberg

Copper deficiency can cause cardiovascular lesions in experimental animals. Previous experiments have shown that the biochemical and itDrphologic lesions induced by deprivation of dietary copper can be suppressed by feeding diets containing starch or can be magnified by a high sucrose diet. In a recent study it was found that the more severe signs of copper deficiency in rats fed sucrose as compared to starch were due to the fructose moiety of sucrose. Although fructose as compared to starch markedly enhanced the symptoms of copper deficiency, the possibility that an effect of dietary carbohydrates due to the nature of the simple carbohydrate (fructose vs glucose) cannot be excluded. The present study was designed to determine if the severity of copper deficiency in rats fed sucrose as compared to starch is due to the glucose as well as the fructose moiety of sucrose. This portion of the study assessed the morphologic changes in aortas of seventy weanling male rats who were fed, for 9 weeks, copper deficient or copper supplemented diets containing either 62% starch, fructose or glucose. The starch-fed copper supplemented group served as the most normal controls. Rats were sacrificed after 9 weeks of dietary treatments. Copper deficiency was verified by reduced serum ceruloplasmin activity and serum and hepatic copper concentration.


2006 ◽  
Vol 12 ◽  
pp. 96-97
Author(s):  
Mihaela Cosma ◽  
Daniel L. Hurley

2021 ◽  
Author(s):  
Maggie D. Seblani ◽  
Susanna A. McColley ◽  
Shunyou Gong ◽  
Lee M. Bass ◽  
Sherif M. Badawy

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