Variation in bacterial communities among stress‐sensitive and stress‐tolerant black tiger shrimp ( Penaeus monodon ) individuals

Abstract

Mortality due to environmental stressors negatively affects Penaeus monodon aquaculture. We compared bacterial communities in P. monodon individuals sensitive and tolerant to salinity and ammonia nitrogen stress using MiSeq in the V4 region of the 16S rRNA gene. Thirty‐eight bacterial phyla and 735 genera were identified, with significantly different compositions among shrimp with different stress tolerance. The dominant phyla in all groups were Proteobacteria, Bacteroidetes, Tenericutes, Firmicutes, Fusobacteria, Actinobacteria and Verrucomicrobia. Proteobacteria was the most abundant and largest phylum overall. Actinobacteria, Verrucomicrobia and Chloroflexi were more abundant in ammonia‐sensitive shrimp than in ammonia‐tolerant ones. Salinity‐sensitive shrimp had greater abundances of Planctomycetes and Parcubacteria than salinity‐tolerant individuals, but a lower abundance of Tenericutes. At the genus level, ammonia‐sensitive shrimp individuals had greater abundances of Pelomonas than ammonia‐tolerant individuals. Meanwhile, salinity‐sensitive individuals had greater abundances of unclassified Rhodobacteraceae, Nautella and Halomonas than salinity‐tolerant individuals, but lower abundances of Vibrio and unclassified Mycoplasmataceae. These results showed that while bacterial compositions were similar across individuals with different stress tolerance, the relative abundances of specific bacterial taxa varied. Our findings indicate a relationship between environmental stress and intestinal microorganisms in P. monodon and contribute to further understand the effects of different environmental stress factors on intestinal microflora of shrimp.

Benthic macroinvertebrates as indicators of water quality: A case study of estuarine ecosystems along the coast of Ghana

“…The high abundance of Penaeus sp. in Ankobra Estuary could be explained by their ability to tolerate wider salinity ranges of whereas other organisms could not [ 103 ] hence could be used as an indicator of salinity. The low abundance of benthic macroinvertebrates in Ankobra Estuary in general is attributed to elevated turbidity levels that increases siltation.…”

“…Tachet et al [ 113 ] points out that lower salinity levels favour the development of sensitive species like Penaeus sp. Given its euryhaline nature [ 103 ] and high percentage composition (94 %) in Ankobra Estuary, the taxon can be considered an indicator taxon of salinity.…”

Hydropower dam alters the microbial structure of fish gut in different habitats in upstream and downstream rivers

“…Meanwhile, we also observed a signi cantly higher phenotypic abundance of Stress_Tolerant microbes in the gut of P. jordani from the Xunjiang River. In general, the expression of a Stress_Tolerant phenotype may be promoted only when animals are exposed to environmental stress (Li et al, 2021;Zhang et al, 2022). During gut in ammation, obligate anaerobes were shown to decrease, and facultative anaerobes increase (Rigottier-Gois, 2013).…”