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Histological assessment of White Sea cod Gadus morhua marisalbi gonads in the summer of 2011–2013
- Belova, N. V., Zhukova, K. A.
- Journal of ichthyology 2016 v.56 no.3 pp. 416-424
- Gadus morhua, anthropogenic activities, cell nucleolus, females, fish, gonads, hermaphroditism, hypertrophy, males, oocytes, reproductive disorders, resorption, summer
- In this paper the reproductive status of Gadus morhua marisalbi (White Sea cod) was investigated using histological methods. There was a high prevalence in gonad abnormalities. In 90.0% of females nucleoli hypertrophy and oocyte resorption observed, and in 95.0% of males germ cell were characterized by destruction processes. For the first time a case of hermaphroditism was documented in White Sea cod. The prevalence of individuals with bisexual gonads was 3.8% in the histologically examined specimens. Reproductive disorders are not species-specific, and similar gonads anomalies have been observed in other species of fish, especially near sites with high anthropogenic impact.