Recruitment Assignment 2011 (Plaice)

Recruitment Assignment 2011 (Plaice) - The data set is on...

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EXST7025 : Biological Population Statistics Spring 2011 Recruitment Assignment Page 1 Compare various versions of Recruitment Models. A. The data are in a data set called 'PLAICE.TXT'. B. Run the same 5 models for the Ricker and Beverton-Holt that I ran on the Arcto – Norwegian Cod, including the two nonlinear versions. C. Determine which model(s), and which version, appear to give the best fits and worst fits? a) Compare Ricker’s model to the Beverton-Holt model. Which appears to be better? Can any fit be completely disregarded as implausible? b) Compare the Linear to the Nonlinear fits. Does there appear to be a substantial difference? c) Do residual plots help in model selection? What other statistical diagnostics appear to be most useful in comparing the models?
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Unformatted text preview: The data set is on the website as” PLAICE.TXT This file also contains some SAS code. INPUT Year ParentalStockBiomass RecruitsAge1; where; parental units are spawning stock biomass and recruit units are millions of individuals. Data for Atlantic Plaice is from: http://www.nefsc.noaa.gov/sos/spsyn/fldrs/plaice/ Loretta O'Brien. Status of Fishery Resources off the Northeastern US. NOAA's National Marine Fisheries Service. Northeast Fisheries Science Center - Resource Evaluation and Assessment Division. December 2006. The data are approximate from a digitized graphic. Note that the mean in the graphic is the geometric mean. EXST7025 : Biological Population Statistics Spring 2011 Recruitment Assignment Page 1 Beam trawl...
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This note was uploaded on 12/29/2011 for the course EXST 7025 taught by Professor Geaghan,j during the Spring '08 term at LSU.

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Recruitment Assignment 2011 (Plaice) - The data set is on...

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