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Evaluation of the separation of triploid and diploid grass carp, Ctenopharyngodon idella (Valenciennes), by external morphology
Author(s) -
Bonar S. A.,
Thomas G. L.,
Pauley G. B.
Publication year - 1988
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1988.tb05537.x
Subject(s) - grass carp , biology , ploidy , morphology (biology) , fish <actinopterygii> , fishery , zoology , carp , cyprinidae , genetics , gene
The external morphology of diploid and triploid grass carp was studied to determine whether the two types could be separated by differences in external characteristics. In a comparison of 27 measurements, six scale counts and five fin formulae from two stocks of diploid and triploid fish obtained from commercial producers, analysis of covariance and discriminant analysis indicated a classification accuracy of only 65–85%. Clearly, triploid grass carp differentiated by external morphology alone should not be stocked into waters where diploid fish are illegal or would cause management problems.