Probiotic Lactococcus lactis subsp. lactis and chitin supplementation in the common carp Cyprinus carpio diet and their influences on growth performance, body composition and feed digestibility

Barghaman, Hossein; Yeganeh, Sakineh; Keramat Amirkolaie, Abdolsamad

doi:10.22124/janb.2020.14899.1074

Probiotic Lactococcus lactis subsp. lactis and chitin supplementation in the common carp Cyprinus carpio diet and their influences on growth performance, body composition and feed digestibility

Document Type : Research Paper

Authors

Department of Fisheries, Sari Agricultural Sciences and Natural Resources University, Sari, Mazandaran, Iran

10.22124/janb.2020.14899.1074

Abstract

Probiotic and prebiotic have many advantages and are employed as a method for aquaculture yield improvement. The main goal of the current study is to evaluate the effect of dietary Lactococcus lactis subsp. lactis as well as chitin on growth performance, carcass composition and feed digestibility in common carp, Cyprinus carpio. So that, 360 juvenile carps with mean initial weight of 12 ± 1.5 g were randomly distributed in 6 treatments based on adding different chitin levels including 0, 1, and 2% and probiotic including 0 and 2% (1×10⁷ CFU/g) to a basal diet and cultured for 8 weeks. At the end of the experiment, growth indices, survival rate, carcass composition and nutrient digestibility were measured. Maximum final weight, weight gain, feed conversion ratio, daily growth rate, feed efficiency and condition factor as well as the lowest FCR were observed in treatments fed with probiotic 2%, chitin 1% and probiotic 2% + chitin 1% (P<0.05). Dietary chitin and probiotic did not alter feed intake and total length in common carps (P>0.05). The experimental treatments did not influence the carcass composition and nutrient digestibility. In conclusion, it seems that adding 2% probiotic and 1% chitin can improve some growth indices in common carp, but can not affect carcass composition and nutrient digestibilty.

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