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Sexual differentiation in Salaria (= Blennius ) pavo
Author(s) -
Patzner R. A.,
Kaurin G.
Publication year - 1997
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.1095-8649.1997.tb01981.x
Subject(s) - biology , sexual differentiation , gonad , hatching , sexual maturity , zoology , endocrinology , embryo , medicine , anatomy , microbiology and biotechnology , genetics , ecology , gene
The sexual differentiation of Salaria (= Blennius ) pavo is described from the stage of hatching to a body length of 35 mm. At hatching, the primordial germ cells (PGCs) can be recognized clearly. At a standard body length of 5 mm, they begin to protrude into the peritoneal cavity and at 14 mm they transform to oogonia. At 17 mm length, the first oocytes can be observed. In males at a standard length of 16–17 mm, the first signs of a differentiation into a testis can be recognized. Shortly after the differentiation of the male sex, the division of the male gonad into a testis and a testicular gland can be seen. The fine structural characteristics of the PGCs and of differentiation stages are presented.