Publication Date:
2021-05-19
Description:
The present study evaluated the effect of Lactobacillus plantarum as a probiotic on the
growth performance and haematological parameters of juvenile rainbow trout
(Oncorhynchus mykiss) weighing 29.6±1.8 g immunized with
streptococcus/lactococcus bivalent vaccine for 60 days at 16±1.5ºC. Fish were
randomly allocated to 4 equal groups: probiotic (g kg^-1
feed equal to 10^8
cells g
^-1
)
supplemented diet group (group P), vaccinated fish fed with a normal diet (group V),
vaccinated fish fed with probiotic (group P+V) and unvaccinated fish fed normal diet
(group C). Results showed that weight gain, final weight, condition factor and thermalunit growth coefficient were improved in P+V group compared with other groups but
was significantly different from groups V and C (p〈0.05). Also, feed conversion ratio
in the P+V group was lower than other trails (p〈0.05). In addition, white blood cell
count (WBC) in groups V and P+V were significantly higher than in both P and C
groups (p〈0.05). Also, PCV was significantly increased (p〈0.05) in both P and P+V
groups compared to group V and the control group. No significant difference (p〉0.05)
was found in RBC, Hb, MCH, MCHC and MCV levels among the different
experimental groups. These data show that application of L. plantarum could be a
benefit of vaccinated trout, enhancing fish growth and haematological parameters.
Description:
Published
Keywords:
Lactobacillus plantarum
;
Rainbow trout
;
Haematological
;
Oncorhynchus mykiss
;
Streptococcosis
;
Lactococcosis
;
Probiotic
;
Juvenile
;
Haematology
;
Growth
;
Vaccine
;
Fish
Repository Name:
AquaDocs
Type:
Journal Contribution
,
Refereed
Format:
pp.283-295
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