Abstract: The paper deals with the Gonadosomatic Index (GSI), spawning season and spawning periodicity of fish Puntius sophore from Jammu water bodies. The GSI showed single highest peak of 14.06±1.59 during the month of July thereby indicating that greater percentage of fish were maturing during this period. Its gradual fall during August and sudden drop during the month of September (0.9±0.59) clearly suggested the onset of spawning activity in this fish. Its gradual fall during August and sudden drop during the month of September (0.9±0.59) clearly suggested the onset of spawning activity in this fish. A fall in GSI value from its maximum, reduction in the size of gonads (flaccid appearance) and occurrence of spent fish characterized by the presence of corpus luteum and prevalence of atretic oocytes, few oogonia and stage I oocytes act as indicator of spawning. On the basis of these parameters, Puntius sophore appear to be monsoon spawner i,e spawn from July to August that may sometime even extend upto early September. Besides GSI, highest percentage of ripe eggs during July to August and decline in September, presence of corpora lutea during August and September very aptly suggest July to September to be the definite breeding period of fish Puntius sophore. While investigating the spawning periodicity in fish, Puntius sophore is an asynchronous spawner and spawn once in a year and have a slightly long period of spawning extending from July to mid-September.
Keywords: Gonadosomatic Index (GSI), Jammu water bodies.
Title: Gonadosomatic index, Spawning season and spawning periodicity in fish Puntius sophore
Author: Krishan Raj Kant, Seema Langer, Chanchal Angral, Jyoti Sharma
International Journal of Life Sciences Research
ISSN 2348-313X (Print)
ISSN 2348-3148 (online)
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