Vol. 3, Issue 4 (2018)
Preliminary observations on age and growth of exotic fish Tilapia (Oreochromis mossambicus P.) from Ana Sagar Lake, Ajmer (India)
Author(s): Sanchita Rose, NC Ujjania, Nandita Soni, AS Rathore, LL Sharma
Abstract: In present paper the scale based detail description on age and growth was expounded that provide detailed information on the life history, ecology of fish and habitat which are important to manage the water body for fish production. This study was conducted during October 2017 to January 2018 and examined the 172 scales of tilapia from commercial fish catch of Ana Sagar Lake, Ajmer (India). The findings of this study reveal that the age of tilapia population varied between 1+ to 4+ year classes with total length (15.00-24.00 cm) and weight (60.00-250.00 gm). During this study different growth parameters were analyzed in that the specific rate of linear growth (Cl) and specific rate of weight increase (Cw) showed decreasing trends with increasing of age. The growth constant average (Clt(Ave)) depicted two growth phases (0.48 and 0.25). On the basis of results of this study it can be inferred that aquatic environment of Ana Sagar Lake, Ajmer is conducive and favorable for this fish which offers the opportunities for satisfactory growth and wellbeing of tilapia. This field data of Tilapia may serve as tool for regulating tilapia population.