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The ploidy and reproductive mechanism of crucian carp, Carassius auratus gibelio
Author(s) -
Fan Z.,
Liu G.
Publication year - 1990
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.1095-8649.1990.tb05621.x
Subject(s) - crucian carp , biology , spermatozoon , carassius , ploidy , zoology , population , feulgen stain , carassius auratus , sex ratio , andrology , fishery , staining , genetics , fish <actinopterygii> , sperm , medicine , demography , sociology , gene
With the method of Feulgen staining, through cytophotometric measurements, the DNA contents of sex‐reversed male (genotypic female) crucian carp (2n = 150 ±) had average values of 2.75 and 1.36 A.U., respectively, in erythrocytes and spermatozoa. The ratio of the erythrocyte and spermatozoon DNA contents of the ‘male’ crucian carp is 2.01:1 (2C: 1C) and is the same as in the normal male, 2.02:1. The crucian carp has a DNA value of 4.1 pg, which is 68% of that in humans. The results of the study suggest that both sex‐reversal males and normal males have the ability to complete the meiotic division during their gametogenesis, and that the population has diploidized over a long term of evolution.