An Objective Means of Species Status Assessment: Adapting the Delphi Technique

2006 ◽  
Vol 34 (2) ◽  
pp. 419-425 ◽  
Author(s):  
KATHLEEN E. CLARK ◽  
JAMES E. APPLEGATE ◽  
LAWRENCE J. NILES ◽  
DAVID S. DOBKIN
2019 ◽  
Vol 20 (5) ◽  
pp. 1175-1185
Author(s):  
Gregory R. Moyer ◽  
Sandra Bohn ◽  
Mark Cantrell ◽  
Ashantye S. Williams

2018 ◽  
Vol 9 (1) ◽  
pp. 302-320 ◽  
Author(s):  
David R. Smith ◽  
Nathan L. Allan ◽  
Conor P. McGowan ◽  
Jennifer A. Szymanski ◽  
Susan R. Oetker ◽  
...  

Abstract Decisions under the U.S. Endangered Species Act (ESA) require scientific input on the risk that the species will become extinct. A series of critiques on the role of science in ESA decisions have called for improved consistency and transparency in species risk assessments and clear distinctions between science input and policy application. To address the critiques and document the emerging practice of the U.S. Fish and Wildlife Service (USFWS), we outline an assessment process based on principles and practices of risk and decision analyses that results in a scientific report on species status. The species status assessment (SSA) process has three successive stages: 1) document the life history and ecological relationships of the species in question to provide the foundation for the assessment, 2) describe and hypothesize causes for the current condition of the species, and 3) forecast the species' future condition. The future condition refers to the ability of a species to sustain populations in the wild under plausible future scenarios. The scenarios help explore the species' response to future environmental stressors and to assess the potential for conservation to intervene to improve its status. The SSA process incorporates modeling and scenario planning for prediction of extinction risk and applies the conservation biology principles of representation, resiliency, and redundancy to evaluate the current and future condition. The SSA results in a scientific report distinct from policy application, which contributes to streamlined, transparent, and consistent decision-making and allows for greater technical participation by experts outside of the USFWS, for example, by state natural resource agencies. We present two case studies based on assessments of the eastern massasauga rattlesnake Sistrurus catenatus and the Sonoran Desert tortoise Gopherus morafkai to illustrate the process. The SSA builds upon the past threat-focused assessment by including systematic and explicit analyses of a species' future response to stressors and conservation, and as a result, we believe it provides an improved scientific analysis for ESA decisions.


2020 ◽  
Vol 2 (11) ◽  
Author(s):  
Jonathan W. Cummings ◽  
Mary Parkin ◽  
Jim Zelenak ◽  
Heather Bell ◽  
Kurt Broderdorp ◽  
...  

2014 ◽  
Vol 84 (Supplement 1) ◽  
pp. 52-59 ◽  
Author(s):  
Sherry A. Tanumihardjo ◽  
Anura V. Kurpad ◽  
Janet R. Hunt

The current use of serum retinol concentrations as a measurement of subclinical vitamin A deficiency is unsatisfactory for many reasons. The best technique available for vitamin A status assessment in humans is the measurement of total body pool size. Pool size is measured by the administration of retinol labelled with stable isotopes of carbon or hydrogen that are safe for human subjects, with subsequent measurement of the dilution of the labelled retinol within the body pool. However, the isotope techniques are time-consuming, technically challenging, and relatively expensive. There is also a need to assess different types of tracers and doses, and to establish clear guidelines for the use and interpretation of this method in different populations. Field-friendly improvements are desirable to encourage the application of this technique in developing countries where the need is greatest for monitoring the risk of vitamin A deficiency, the effectiveness of public health interventions, and the potential of hypervitaminosis due to combined supplement and fortification programs. These techniques should be applied to validate other less technical methods of assessing vitamin A deficiency. Another area of public health relevance for this technique is to understand the bioconversion of β-carotene to vitamin A, and its relation to existing vitamin A status, for future dietary diversification programs.


2007 ◽  
Vol 30 (4) ◽  
pp. 29
Author(s):  
R. Wong ◽  
S. Roff

In Canada, graduates of internal medicine training programs should be proficient in ambulatory medicine and practice. Before determining how to improve education in ambulatory care, a list of desired learning outcomes must be identified and used as the foundation for the design, implementation and evaluation of instructional events. The Delphi technique is a qualitative-research method that uses a series of questionnaires sent to a group of experts with controlled feedback provided by the researchers after each round of questions. A modified Delphi technique was used to determine the competencies required for an ambulatory care curriculum based on the CanMEDS roles. Four groups deemed to be critical stakeholders in residency education were invited to take part in this study: 1. Medical educators and planners, 2. Members of the Canadian Society of Internal Medicine (CSIM), 3. Recent Royal College certificants in internal medicine, 4. Residents currently in core internal medicine residency programs. Panelists were sent questionnaires asking them to rate learning outcomes based on their importance to residency training in ambulatory care. Four hundred and nineteen participants completed the round 1 questionnaire that was comprised of 75 topics identified through a literature search. Using predefined criteria for degree of importance and consensus, 19 items were included in the compendium and 9 were excluded after one round. Forty-two items for which the panel that did not reach consensus, as well as 3 new items suggested by the panel were included in the questionnaire for round 2. Two hundred and forty participants completed the round 2 questionnaire; consensus was reached for each of the 45 items. After two rounds, 21 items were included in the final compendium as very high priority topics (“must be able to”). An additional 26 items were identified as high priority topics (“should be able to”). The overall ratings by each of the four groups were similar and there were no differences between groups that affected the selection of items for the final compendium. To our knowledge this is the first time a Delphi-process has been used to determine the content of an ambulatory care curriculum in internal medicine in Canada. The compendium could potentially be used as the basis to structure training programs in ambulatory care. Barker LR. Curriculum for Ambulatory Care Training in Medical residency: rationale, attitudes and generic proficiencies. J Gen Intern Med 1990; 5(supp.):S3-S14. Levinsky NG. A survey of changes in the proportions of ambulatory training in internal medicine clerkships and residencies from 1986-87 to 1996-97. Acad Med 1998; 73:1114-1115. Linn LS, Brook RH, Clarke VA, Fink A, Kosecoff J. Evaluation of ambulatory care training by graduates of internal medicine residencies. J Med Educ 1986; 61:293-302.


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