부산 조도연안 어류, 감성가자미, Pleuronectes obscurus (Herzenstein), 전어, Konosirus punctatus (Temminck et Schlegel) 및 돌팍망둑, Pseudoblennius percoides (G&uuml

Abstract

The objective of this study was to clarify the cytogenetic features, including karyotypes, cellular DNA contents and nuclear size of erythrocytes of three species of fish, the black plaice Pleuronectes obscurus (Herzenstein, 1890), the dotted gizzard shad Konosirus punctatus (Temminck et Schlegel) and the perch sculpin Pseudoblennius percoides (G&uuml

m3 in P. obscurus, K. punctatus and P. percoides, respectively. The ratios of major/minor axis of the nucleus were 1.64 in K. punctatus, 1.24 in P. obscurus, and 1.25 in P. percoides, which in turn may be responsible for the more elliptic form of the nucleus in K. punctatus.

m2 and 9.6 ± 0.78 &micro

m3, and 5.9 ± 0.19 &micro

m2 and 13.5 ± 0.87 &micro

m3, 8.1 ± 0.33 &micro

m2 and 9.6 ± 0.79 &micro

m in P. percoides, respectively. The mean surface area and volume of erythrocyte nuclei were 5.8 ± 0.12 &micro

m and 2.4 ± 0.16 &micro

m in K. punctatus, and 3.0 ± 0.21 &micro

m and 2.5 ± 0.07 &micro

m in P. obscurus, 4.1 ± 0.10 &micro

m and 2.5 ± 0.16 &micro

nther), in the coastal area of Jo Island, Busan, Korea. The karyotypes of P. obscurus and K. punctatus both had a diploid number of 2N = 48 and a fundamental number (FN) = 48, with a chromosome formula of 48T. The karyotype of P. percoides had a diploid number of 2N = 46 and FN = 50, with a chromosome formula of 4SM + 42T. No sex-associated heteromorphic pairs were detected for any species in this study.

The variation in the DNA values (P. obscurus = 1.15 pg/nucleus, K. punctatus = 1.56 pg/nucleus, P. percoides = 1.11 pg/nucleus) was positively related to the variation in chromosome FN in fish examined.

The mean major and minor axes of erythrocyte nuclei measured 3.1 ± 0.16 &micro