geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Conditions and limitations on learning in the adaptive management of mallard harvests


, : Conditions and limitations on learning in the adaptive management of mallard harvests. Wildlife Society Bulletin 30(1): 176-185, Spring

In 1995, the United States Fish and Wildlife Service adopted a protocol for the adaptive management of waterfowl hunting regulations (AHM) to help reduce uncertainty about the magnitude of sustainable harvests. To date, the AHM process has focused principally on the midcontinent population of mallards (Anas platyrhynchos), whose dynamics are described by 4 alternative models. Collectively, these models express uncertainty (or disagreement) about whether harvest is an additive or a compensatory form of mortality and whether the reproductive process is weakly or strongly density-dependent. Each model is associated with a probability or "weight," which describes its relative ability to predict changes in population size. These Bayesian probabilities are updated annually using a comparison of population size predicted under each model with that observed by a monitoring program. The current AHM process is passively adaptive, in the sense that there is no a priori consideration of how harvest decisions might affect discrimination among models. We contrast this approach with an actively adaptive approach, in which harvest decisions are used in part to produce the learning needed to increase long-term management performance. Our investigation suggests that the passive approach is expected to perform nearly as well as an optimal actively adaptive approach, particularly considering the nature of the model set, management objectives and constraints, and current regulatory alternatives. We offer some comments about the nature of the biological hypotheses being tested and describe some of the inherent limitations on learning in the AHM process.

US$19.90

DOI: 10.2307/3784651


Other references

Han, Y.; Bi, Y.; Bi, H.; Diao, C.; Zhang, G.; Cheng, K.; Yang, Z., 2016: miR-137 suppresses the invasion and procedure of EMT of human breast cancer cell line MCF-7 through targeting CtBP1. Distant metastasis is the predominant site of gastric cancer recurrence and the most common cause of death. Recently, accumulating evidence has established that aberrant epithelial-mesenchymal transition activation plays a crucial role in the gene...

Altura B.M.; Burton R.W., 1972: Structure activity relationships of neuro hypophyseal hormones on rat arterial and arteriolar smooth muscle relationship of magnesium ions to contractile activity. Federation Proceedings 31(2): 542

Velthuis P.J.; Wildschut E.G.; D.L.F.ille H.B.; Van Vloten W.A.; Van Weelden H.; Kater L., 1990: Binding of antibodies to nonhistone nucleoproteins on keratinocytes in suspensions. Antibody binding on the cell surface of epidermal cells, recently established on cultured neonatal foreskin cells, is supposed to play a role in the pathogenesis of in vivo antinuclear antibodies (ANA) of the skin. To study this phenomenon in susp...

Strain G.W.; Zumoff B.; Levin J.; Rosenfeld R.S.; Kream J., 1982: The effect of weight loss on the pituitary gonadal axis in obesity. American Journal of Clinical Nutrition 35(4): 858

Scullion, B., 1999: Let workers make the insurance choices. Modern Healthcare 29(25): 100-100

Dhawan, P.; Richmond, A., 2002: A novel NF-kB-inducing kinase-Mapk signaling pathway up-regulates NF-kB activity in melanoma cells. The Journal of Biological Chemistry 277(10): 20-8

Bognar, A.; Desrosiers, L.; Libman, M.; Newman, E.B., 1982: Control of nitrogenase in a photosynthetic autotrophic bacterium, Ectothiorhodospira sp. An Ectothiorhodospira species fixed nitrogen when grown as an autotroph in completely inorganic medium by using a variety of electron donors. The organism also used organic carbon sources; however, this required induction of synthesis of various e...

Morgan, T.; Adam, W.; Carney, S.; Gibbard, R.; Brown, S.; Wheeler, D., 1979: Treatment of mild hypertension in elderly males. 1. Males, born between 1900 and 1925, with mild hypertension have been treated for periods varying from 300 to 2000 days. 2. The life and death status of all patients (except two) was known on 1st November 1978. 3. A group of patients with mild hy...

Bubliy, O.A.; Tcheslavskaia, K.S.; Kulikov, A.M.; Lazebny, O.E.; Mitrofanov, V.G., 2008: Variation of wing shape in the Drosophila virilis species group (Diptera : Drosophilidae). Wing shape variation was analysed with geometric morphometric methods in 17 laboratory strains, representing 11 closely related species (including two subspecies) of the Drosophila virilis group: D. virilis, D. lummei, D. novamexicana, D. american...

Axt G., 1971: Wave band columns for gas exchange. Husmann, Wilhelm Vom Wasser Band Xxxviii Ein Jahrbuch Fuer Wasserchemie Und Wasserreinigungstechnik (About Water, Vol Xxxviii An Annual For Water Chemistry And Water Purification Technique) Viii+463p Illus Verlag Chemie: Weinheim-Bergstr , West Germany 391-404