Open AccessEffect of dietary protein levels on the growth of Carnatic carp Barbodes carnaticus (Jerdon, 1849) fingerlings
Author(s) -
Sridhar Nimmagadda,
Gangadhar Barlaya,
Uma latha,
C. H. Raghavendra,
S.S. Giri,
P. Jayasankar
Publication year - 2017
Publication title -
indian journal of fisheries
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.216
H-Index - 12
ISSN - 0970-6011
DOI - 10.21077/ijf.2017.64.special-issue.76270-29
Subject(s) - dry matter , zoology , feed conversion ratio , biology , proximate , dietary protein , composition (language) , protein efficiency ratio , nutrient , organic matter , body weight , food science , chemistry , ecology , endocrinology , linguistics , philosophy
Fingerlings of Barbodes carnaticus (Jerdon 1849) (6.40±0.267 cm, 2.46±0.39 g) were reared in aerated plastic tubs (40 l) with five iso-energetic diets formulated to contain crude protein levels ranging from 25 to 45% using pure ingredients. Initially, the diet was fed at @5% of the biomass and gradually adjusted based on daily feed consumption. The fish were allowed to feed for 6 h and thereafter the unconsumed feeds were siphoned out. The following day, faecal matter was collected from each tank by filtering the water with a fine meshed nylon cloth (15 μm), dried, pooled and stored for proximate analysis. Water from eachtub was replaced with 50% freshwater every day after faecal matter collection. The feeding trial was conducted for a period of 60 days. Proximate composition of feed and faecal matter was analysed. Acid insoluble ash was used as the reference marker for dry matter, protein and fat digestibility determination. The growth parameters and protein efficiency ratio (PER) were higher (p 0.05) and fat content (p<0.05) in fish fed 35% protein diet compared to other diets. The digestibility ofdry matter and nutrients was higher (p<0.05) with 35% protein diet. The study revealed crude protein requirement of 35% by the fingerlings of B. carnaticus.