Dietary effect of apple cider vinegar and propionic acid on immune related transcriptional responses and growth performance in white shrimp, Litopenaeus vannamei.
Study Goal
The researchers aimed to study the effect of Apple Cider Vinegar (ACV®) and Propionic acid (PA) on immune-related gene expression and growth performance in white shrimp.
Results Summary
ACV® and PA diets did not significantly affect shrimp growth but upregulated immune-related genes (Lys and proPo) after 30 and 60 days. Pen-3a expression increased in PA and some ACV® groups, while Cru expression varied between ACV® and PA diets.
Population
White shrimp (Litopenaeus vannamei) with an average initial weight of 10.2 ± 0.04 g.
Effective Dosage
1%, 2%, and 4% ACV® diets, fed 4 times daily at 2.5% of body weight.
Duration
60 days.
Interactions
None mentioned.
| Intervention | Direction | Endpoint | Population | Dosage | Impact | Claim # |
|---|---|---|---|---|---|---|
Propionic acid (PA) | increase | growth performance | white shrimp (Litopenaeus vannamei) | no significant difference | showed no significant difference | #1 |
ACV® | increase | growth performance | white shrimp (Litopenaeus vannamei) | no significant difference | showed no significant difference | #2 |
0.5% PA diet | increase | growth performance | white shrimp (Litopenaeus vannamei) | no significant difference | showed no significant difference | #3 |
1% ACV® diet | increase | growth performance | white shrimp (Litopenaeus vannamei) | no significant difference | showed no significant difference | #4 |
2% ACV® diet | increase | growth performance | white shrimp (Litopenaeus vannamei) | no significant difference | showed no significant difference | #5 |
4% ACV® diet | increase | growth performance | white shrimp (Litopenaeus vannamei) | no significant difference | showed no significant difference | #6 |
This experiment was conducted to study the effect of various levels of ACV® and Propionic acid (PA) on expression of immune related genes and growth performance in white shrimp (Litopenaeus vannamei). Three hundred and seventy-five shrimps with an average initial weight of 10.2 ± 0.04 g were collected and acclimatized for two weeks. Five experimental diets including control diet, 0.5% PA diet and 1%, 2% and 4% ACV® diets were applied to feed the shrimps. They were fed 4 times a day with 2.5% of body weight. After 60 days of culture, shrimps fed with ACV® and PA diets showed no significant difference in growth performance. Expression of prophenoloxidase (proPo), lysozyme (Lys), penaeidin-3a (Pen-3a) and Crustin (Cru) genes were determined from hepatopancreas, using the real-time PCR after 15, 30 and 60 days. Expression of Lys and proPo genes was significantly up regulated in shrimps fed with ACV® and PA diets compared to the control group after 30 and 60 days of treatment. After 15 days, Pen-3a gene expression was significantly higher in PA group compared to the control group. Also, shrimps fed with 1% and 4% ACV® and PA diets showed significantly increased expression of Pen-3a after 30 days. In contrast, expression of Cru was significantly down regulated in response to ACV® diets, but, Cru expression in treated shrimps with PA diet was greater than the control group after 30 and 60 days. Overall, the results provided evidence that ACV® could be used as a natural immunostimulant for shrimps in order to adjust and enhance expression of the immune related genes.