Effect of Lactobacillus rhamnosus GG Supplementation on the Growth Performance, Survival rate and Morphometry of Grass Carp (Ctenopharyngodon idella)
Effect of Lactobacillus rhamnosus GG Supplementation on the Growth Performance, Survival rate and Morphometry of Grass Carp (Ctenopharyngodon idella)
Misbah Farooq1, Muhammad Zubair Anjum1*, Zahir Muhammad1, Maqsood Jan1, Muhammad Shahbaz Azhar1, Shaina Rasool1 and Muhammad Qayash Khan2
ABSTRACT
The current study was conducted to assess the impact of market available probiotic containing Lactobacillus rhamnosus GG bacteria on the growth performance and morphometric characters of grass carp for 60 days. A total of 120 fish fingerlings of mean weight 2.95±0.27g were randomly distributed into four experimental groups having three replicates (n=10/aquarium) and fed with four experimental diets i.e., D1 (commercial fish feed without probiotics as control), D2, D3 and D4 (commercial fish feed with addition of 2g, 4g and 6g Lactobacillus rhamnosus GG/ kg respectively) @ 5% of their body weight. Growth performance was determined in terms of final body weight (FBW), weight gain (WG), percent weight gain (%WG), average daily weight gain (AWG), specific growth rate (SGR), feed conversion ratio (FCR) and survival rate (SR) of fingerlings. Morphometric traits were measured including total length (TL), standard length (SL), fork length (FL), head length (HL), eye diameter (ED), dorsal fin length (DFL), pectoral fin length (PFL), pelvic fin length (PvFL), anal fin length (AFL) and caudal fin length (CFL). The highest FBW (14.20±0.08g), WG (11.25±0.08g), AWG (0.18±0.00g), SGR (2.61±0.05% day-1), %WG (381.340±14.40g), and SR (100%) and lowest FCR (1.94±0.00) were recorded in D4 (P< 0.05) followed by D3, D2 and D1. Fish fed with probiotics showed improved (P<0.05) morphometric traits and highest TL(15.19±0.29cm), SL(13.17±0.40cm), FL(14.04±0.28cm), HL(1.76±0.04cm), ED(0.62±0.04cm), DFL(1.82±0.04cm), PFL(1.43±0.04cm), PvFL(1.36±0.05cm), AFL(1.41±0.09cm) and CFL(1.82±0.04cm) was observed in D4. The result of this study demonstrated the importance of commercial probiotic as feed additives containing L. rhamnosus GG to improve the growth, survival rate and morphometric parameters of grass carp.
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