HISTOLOGICAL ALTERATIONS IN BRAIN TISSUES OF TERAPON PUTA COLLECTED FROM SEWAGE DISPOSAL SITE, THERESPURAM OFF THOOTHUKUDI, SOUTHEAST COAST OF INDIA

摘要

A study was conducted to find out the histological alterations in brain tissue of small-scale banded grunter, Terapon puta collected from sewage disposal site Therespuram off Thoothukudi, Southeast coast of India. Specimens of Terapon puta were collected from the study site, bimonthly from Sep' 2016 to June' 2017 with the help of local fishermen by gillnetting. Brain tissue was collected from the fish specimens and stored in Bouine solution for histological analysis. Histological sections were prepared and sections were stained with haemotoxylin and eosin following standard histological protocol. Histological sections were observed under trinocular microscope. Histological changes iike enlarged pyramidal cell, ruptured nucleus and binucleated nucleus, degenerated nucleus and hemorrhage were noticed. The above results indicate that sewage pollution impacts the brain of fishes at tissue level which may in turn affect the structure and function of other organ systems if the pollutants persist in the system for long.