"Fish being a major food source for many countries and for many millions of peoples, it is established that pesticide toxins and abnormal environmental conditions are lethal to fish population and its survival. In these contest tissues of fish, Glossogobius Giuris was studded and explained the consequence and impacts of Toxins on Fish Endocrinology and Physiology and Reproduction.
The hypothalamo – hypophyseal – ovarian system of gobiid fish, Glossogobius Giuris, exhibited seasonal changes. It has been established that in vertebrates the neurosecretory system serves as a functional and morphological link between the hypothalamus and the hypophysis.
Based on the histological studies two neuroendocrine system had been recognized, viz., the preopticohypophysial system and the system of nucleus lateralis tuberis (NLT). The nucleus preopticus (NP0) is generally divided into pars parvocellularis (Ppc) and pars magnocellularis (Pmc).
This has been confirmed in G. giuris. The neurons of the NPO are known to be chromalum haematoxylin phloxin (CAHP) or paraldehyde thionine and paraldehyde fuchsine positive. The NPO neurons of G. giuris contain CAHP and AF positive granules and their axons are heavily loaded with neurosecretory material."