Multi-biomarker responses in the subantarctic fish (Patagonotothen tessellata) to asses the impact of anthropic pollution in coastal waters of Beagle Channel.

FERREIRA, MF; GENOVESE, G; FERNÁNDEZ, DANIEL A.; LO NOSTRO, F

Simposio; 11th International symposium of reproductive physiology of fish; 2018

Males collected from polluted sites had lower HSI and GSI than those from reference locations. Testes were characterized as unrestricted lobular type and no histopathology or intersex condition was identified. Males from contaminated sites had significantly higher levels of estradiol than control males but no difference was found between seasons. Totalplasma proteins showed a positive correlation with GSI whereas the opposite was observed 2with mucus proteins irrespective of the site. Plasmatic protein levels were higher in males from polluted sites, where VTG was detected. Water analysis revealed differences betweensampling sites, with high solid residuals and sulphates in water from polluted locations. The anthropic activities negatively influence on the coastal environment of Ushuaia city, not only in the water quality but also in fish. The abnormal detection of VTG in blood andaltered sex hormone levels in contaminated fish may impact parental behavior. The presentstudy sets baseline data to further studies in this region and provides strong evidences of reproductive disruption due to xenobiotics exposure in the sub Antarctic fish Patagonotothen tessellata.