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| Nelitz, Marc A; ESSA Technologies Ltd.; mnelitz@essa.com; Beardmore, Ben; Beardmore Consulting LLC; Wisconsin Department of Natural Resources; Alan.Beardmore@wisconsin.gov; Machtans, Craig S; Canadian Wildlife Service, Environment Canada; Craig.Machtans@ec.gc.ca; Hall, Alexander W; ESSA Technologies Ltd.; ahall@essa.com; Wedeles, Chris; ArborVitae Environmental Services Ltd.; chris@avesltd.ca. |
| Complexity and uncertainty are inherent in social-ecological systems. Although they can create challenges for scientists and decision makers, they cannot be a reason for delaying decision making. Two strategies have matured in recent decades to address these challenges. Systems thinking, as embodied by conceptual modeling, is a holistic approach in which a system can be better understood by examining it as a whole. Expert elicitation represents a second strategy that enables a greater diversity of inputs to understand complex systems. We explored the use of conceptual models and expert judgments to inform expansion of monitoring around oil sands development in northern Alberta, Canada, particularly related to migratory forest birds. This study area is a... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Complexity; Conceptual modeling; Expert judgment; Migratory birds; Oil sands; Uncertainty. |
| Ano: 2015 |
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| Johnson, Fred; U.S. Fish and Wildlife Service; fred_a_johnson@fws.gov; Williams, Ken; ; byron_ken_williams@nbs.gov. |
| Waterfowl harvest management in North America, for all its success, historically has had several shortcomings, including a lack of well-defined objectives, a failure to account for uncertain management outcomes, and inefficient use of harvest regulations to understand the effects of management. To address these and other concerns, the U.S. Fish and Wildlife Service began implementation of adaptive harvest management in 1995. Harvest policies are now developed using a Markov decision process in which there is an explicit accounting for uncontrolled environmental variation, partial controllability of harvest, and structural uncertainty in waterfowl population dynamics. Current policies are passively adaptive, in the sense that any reduction in structural... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Adaptive management; Harvest; Hunting regulations; Markov decision process; Migratory birds; Optimization; Uncertainty; Waterfowl.. |
| Ano: 1999 |
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| MONTALVO-CORRAL,MARICELA; REYES-LEYVA,JULIO; HERNÁNDEZ,JESÚS. |
| Avian influenza viruses produce mainly respiratory and intestinal diseases. Their relevance in the generation of pandemic strains has led to a large amount of research to understand their distribution in nature, as well as the relations that become established for the effective transmission among different hosts. Waterfowl have been recognized as their natural reservoir and they play an important role in the propagation and generation of the diversity of these viruses. The emergence of new influenza viruses with pandemic potential among the human population (H5N1 of avian origin or recombinant H1N1 with avian segments) point our lack of information on many aspects of the ecology and epidemiology of these viruses in their natural hosts to enable the... |
| Tipo: Journal article |
Palavras-chave: Avian influenza; Ecology; Epidemiology; Migratory birds. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2010000400008 |
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