Package: SPAS 2024.1.31

SPAS: Stratified-Petersen Analysis System

The Stratified-Petersen Analysis System (SPAS) is designed to estimate abundance in two-sample capture-recapture experiments where the capture and recaptures are stratified. This is a generalization of the simple Lincoln-Petersen estimator. Strata may be defined in time or in space or both, and the s strata in which marking takes place may differ from the t strata in which recoveries take place. When s=t, SPAS reduces to the method described by Darroch (1961) <doi:10.2307/2332748>. When s<t, SPAS implements the methods described in Plante, Rivest, and Tremblay (1988) <doi:10.2307/2533994>. Schwarz and Taylor (1998) <doi:10.1139/f97-238> describe the use of SPAS in estimating return of salmon stratified by time and geography. A related package, BTSPAS, deals with temporal stratification where a spline is used to model the distribution of the population over time as it passes the second capture location. This is the R-version of the (now obsolete) standalone Windows program available at <https://home.cs.umanitoba.ca/~popan/spas/spas_home.html>.

Authors:Carl James Schwarz

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Bug tracker:https://github.com/cschwarz-stat-sfu-ca/spas/issues

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3 exports 2 stars 2.19 score 21 dependencies 1 dependents 6 mentions 29 scripts 175 downloads

Last updated 8 months agofrom:73ba39ad5a. Checks:OK: 9. Indexed: yes.

Exports:SPAS.autopoolSPAS.fit.modelSPAS.print.model

Dependencies:cliexpmgluelatticelifecyclemagrittrMASSMatrixmsmmvtnormnumDerivplyrRcppRcppEigenreshape2rlangstringistringrsurvivalTMBvctrs