نتایج جستجو برای: barren lands
تعداد نتایج: 12079 فیلتر نتایج به سال:
Here we provide evidence that both pharmacological and environmental manipulations similarly blunt the cortisol release in response to an acute stressor in adult zebrafish. Different groups of fish were maintained isolated or group-housed in barren or enriched tanks, and then exposed or not to diazepam or fluoxetine. Acute stress increased cortisol levels in group-housed zebrafish maintained in...
ACKNOWLEDGMENTS The authors wish to acknowledge input from Gary Hunt and Jonathan Rubin, who are members of David Lewis's thesis committee. In addition, David Field, Thomas Power, and especially Gary Hunt provided helpful comments on an earlier version of this bulletin. David Lewis is appreciative of financial support for his graduate studies provided by the University of Maine Graduate Assista...
Throughout the 20th century, many countries created national parks, forests, nature reserves, and sanctuaries to provide benefits that are underproduced on private lands . Private lands are now especially valuable for providing ecological services that publi c lands cannot provide, due to the increasing demands for all uses and the political and economic conflicts associated with allocating pub...
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