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Identification of Juvenile Hybrids of Morone Based on Meristics and Morphometrics
Author(s) -
Harrell Reginal M.,
Dean John Mark
Publication year - 1988
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1988)117<0529:iojhob>2.3.co;2
Subject(s) - meristics , biology , morone , morphometrics , hybrid , discriminant function analysis , juvenile , morone saxatilis , linear discriminant analysis , zoology , bass (fish) , fishery , statistics , ecology , mathematics , botany
Abstract We made meristic and morphometric measurements on juveniles (25–100 mm total length) of hatchery‐produced striped bass Morone saxatilis , white bass M. chrysops , original and reciprocal F 1 hybrids, original F 2 hybrids, and backcrosses with the original F 1 female. We compared both sets of measurements with published data and among themselves to delineate progeny differences. Meristic and morphometric values for all hybrids were generally intermediate between those of their parents, but exhibited considerable variation. We examined 11 meristic characters for detection of statistically significant differences ( P < 0.05) between crosses that might be used for identification; of these, the numbers of lateral line scales, soft dorsal rays, and gill rakers differed among crosses. We examined 31 morphometric ratios with linear discriminant function tests for statistical differences between crosses. With the six best of these ratios, the overall discriminant analysis resulted in an 83% acceptable classification, and several crosses (16 out of 84 comparisons) were correctly segregated 100% of the time. After meristic differences were used to initially group samples of fish in a blind test, the discriminant function derived from the morphometric ratios allowed individual fish to be properly classified with a high degree of accuracy.