|Title:||MORPHO Fortran computer programs for the collection and multivariate analysis of morphometric distance characters|
|Author/Editor:||Gary A. Winans|
|Institution:||User guide. Coastal Zone and Estuarine Studies Division, Northwest and Alaska Fisheries Science Center. National Marine Fisheries Service|
MORPHO is a series of NMFS computer programs designed for the collection and multivariate analysis of morphometric distance characters. MORPHO consists of three FORTRAN programs:
1) DIGITIZE—collects X-Y coordinate data from a remote computer device, e.g., a digitizing pad, for relevant morphological features or landmarks around the outline of a specimen.
2) MMCALC—calculates Euclidean (=morphometric) distances between any pair of landmarks in any geometrical pattern. Output is n untransformed distance measurements.
3) PCA/SHEAR—computes principal components from the overall variance–covariance matrix for continuous and discrete data and shears components II–IV to produce size–free shape components [after Humphries et al. 1981, Systematic Zoo1ogy (3 )]. Output includes component scores on I-IV and sheared scores on II-IV. Results are viewed on B.M.D. plots and histograms.