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R. Lande (1993)
Risks of Population Extinction from Demographic and Environmental Stochasticity and Random CatastrophesThe American Naturalist, 142
(1990)
RAMAS/space user manual: spatially structured population models for conservation biology
M. Pascual, P. Kareiva (1996)
Predicting the outcome of competition using experimental data : Maximum likelihood and bayesian approachesEcology, 77
S. Carpenter, K. Cottingham, C. Stow (1994)
Fitting Predator-Prey Models to Time Series with Observation ErrorsEcology, 75
J. Boulanger, C. Krebs (1994)
Comparison of capture–recapture estimators of snowshoe hare populationsCanadian Journal of Zoology, 72
B. Sæther, S. Engen, Aminul Islam, R. Mccleery, C. Perrins (1998)
Environmental Stochasticity and Extinction Risk in a Population of a Small Songbird, the Great TitThe American Naturalist, 151
D. Ludwig, C. Walters (1985)
Are age-structured models appropriate for catch-effort data?Canadian Journal of Fisheries and Aquatic Sciences, 42
R. Freckleton (1999)
The Ecological Detective: Confronting Models with DataJournal of Applied Ecology, 36
M. Pascual, P. Kareiva, R. Hilborn (1997)
The Influence of Model Structure on Conclusions about the Viability and Harvesting of Serengeti WildebeestConservation Biology, 11
M. Wolfe, John Kimball (1989)
Comparison of Bison Population Estimates with a Total CountJournal of Wildlife Management, 53
D. Middleton, A. Veitch, R. Nisbet (1995)
The Effect of an Upper Limit to Population Size on Persistence TimeTheoretical Population Biology, 48
B. Dennis, P. Munholland, J. Scott (1991)
Estimation of Growth and Extinction Parameters for Endangered SpeciesEcological Monographs, 61
W. Fagan, E. Meir, Joslin Moore (1999)
Variation Thresholds for Extinction and Their Implications for Conservation StrategiesThe American Naturalist, 154
D. Doak, P. Kareiva, J. Fieberg, M. Groom, W. Morris (1999)
A Practical Handbook for Population Viability Analysis
M. Burgman, S. Ferson, H. Akçakaya (1993)
Risk assessment in conservation biology
D. Ludwig, C. Walters (1989)
A Robust Method for Parameter Estimation from Catch and Effort DataCanadian Journal of Fisheries and Aquatic Sciences, 46
C. Walters, D. Ludwig (1981)
Effects of Measurement Errors on the Assessment of Stock–Recruitment RelationshipsCanadian Journal of Fisheries and Aquatic Sciences, 38
Abstract: Estimating the risk of extinction for populations of endangered species is an important component of conservation biology. These estimates must be made from data that contain both environmental noise in the year‐to‐year transitions in population size (so‐called “process error”), random errors in sampling, and possible biases in sampling ( both forms of observation errors). To determine how much faith to place in estimated extinction rates, it is important to know how sensitive they are to observation error. We used three simple, commonly employed models of population dynamics to generate simulated population time series. We then combined random observation error or systematic biases with those data, fit models to the time series data, and observed how close the extinction dynamics of the fitted models compared with the dynamics of the underlying models. We found that systematic biases in sampling rarely affected estimates of extinction risk. We also found that even moderate levels of random observation error do not significantly affect extinction estimates except over a small range of process errors, corresponding to the region where extinction risk is most uncertain. With more substantial sampling error, estimates of extinction risk degraded rapidly. Field census techniques for a variety of taxa often involve observation errors within ±32% of actual population sizes. For typical time series used in conservation, therefore, we often may not need to be overly concerned about observation errors as an extra source of imperfection in our estimated extinction rates.
Conservation Biology – Wiley
Published: Feb 1, 2000
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