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- Title
Immune responses of Litopenaeus vannamei to non-ionic ammonia stress: a comparative study on shrimps in freshwater and seawater conditions.
- Authors
Jia, Xuying; Zhang, Dan; Wang, Fang; Dong, Shuanglin
- Abstract
To investigate the effect of non-ionic ammonia ( NH3-N) stress (0.1 and 0.5 mg L−1) on the immunity of Litopenaeus vannamei cultured in long-term freshwater, the total haemocyte count ( THC), the activity of phenoloxidase ( PO), nitric oxide synthase ( NOS), superoxidase dismutase ( SOD) and the content of malondialdehyde ( MDA) were determined and further compared with those of seawater shrimps. The results showed that NH3-N stress significantly reduced THC and the activity of PO and SOD ( P < 0.05). Under 0.1 mg L−1 NH3-N stress, NOS activity increased first and then decreased significantly, while it dropped dramatically under 0.5 mg L−1 NH3-N stress ( P < 0.05). During NH3-N stress, MDA content increased continuously, and the MDA content in hepatopancreas of freshwater shrimps was higher than that of seawater shrimps. It was concluded that NH3-N stress significantly influenced the non-specific immunity and could also upset the balance of antioxidant system of L. vannamei in both freshwater and seawater shrimps. Compared with in seawater, the shrimps in freshwater were more vulnerable to NH3-N stress because of higher lipid peroxidation and lower immunity.
- Subjects
WHITELEG shrimp; DECAPODA; NITROGEN compounds; LITOPENAEUS; IMMUNE response
- Publication
Aquaculture Research, 2017, Vol 48, Issue 1, p177
- ISSN
1355-557X
- Publication type
Article
- DOI
10.1111/are.12872