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Figures & data
Figure 1. Antarctic toothfish abnormal gonads from (a) the first, bisexual specimen, with the ovaries (O) and testis (T) indicated, and (b) the second specimen, with filiform gonads.
Figure 2. Histological characteristics of the bisexual gonads of the first specimen: (a) ovarian portion; (b) oocyte resorption area near testicular and ovarian tissue junctions; (c) testicular and ovarian tissue junctions; (d) testicular portion of ovotestis. Abbreviations: CT—connective tissue, PG—primary growth, CA—cortical alveolar, Vtg1—primary and Vtg2—secondary vitellogenic oocytes, A—atretic follicles, SG—spermatogonia, SC—primary spermatocyte.
Figure 3. Histological characteristics of (a) and (с) the filiform gonads of the second specimen and (b) and (d) the normal testes of Antarctic toothfish. Abbreviations: CT—connective tissue, SG—spermatogonia, SC—primary spermatocyte, W—wall of the gonad.
