Influence of body weight/age on the food intake, growth and conversion efficiency of Gambusia affinis

✍ Scribed by Katre Shakuntala; S. Ravichandra Reddy

• Publisher: Springer
• Year: 1977
• Tongue: English
• Weight: 296 KB
• Volume: 55
• Category: Article
• ISSN: 1573-5141
• DOI: 10.1007/bf00034806

✦ Synopsis

On a restricted food supply of Tubifex tubifex (2 h/day) the fish consumed only 69.5 mg dry food/g live fish/day and grew only to 25.6 mg live body weight by the 30th day of it's age, while those fed ad libitum consumed 94.7 mg/g/day and attained a body weight of 125.9 mg live weight by the 30th day. Conversion efficiency (Kl) averaged to 8.3% in theformerand 14.% inthelatter series, throughout the 3o day experimental period.

Feeding rate of the test series fed individually and at adlibitum, decreased from 780 mg dry food/g dry fish/day for a fish weighing 4 mg dry weight to 8o mg/g/day for one weighing 41 mg, exhibiting a log-log relationship to the body weight (Y = 2.2014-0.5639 X). Growth rate also decreased as a log-log function with increasing body weight (Y = 1.2309-0.4384 X).