Water Quality–Disease Relationship on Commercial Fish Farms

Svobodová, Zdeňka; Máchová, Jana; Kroupová, Hana Kocour; Velíšek, Josef

doi:10.1016/b978-0-12-804564-0.00007-7

Cited by 24 publications

(32 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Consequently, the age of the fish could also influence its response to a given contaminant or toxicant in a given medium as reported by [57]. Findings from this study on binary combination of the heavy metals is consistent with the observations of Hilmy et al [30] who reported that copper was significantly more toxic than zinc for the 96hrs LC 50 exposure with Clarias lazera [58][59][60][61][62][63][64][65][66][67].…”

Section: Resultssupporting

confidence: 86%

Acute Toxicity of Copper and Zinc and their Lethal Concentration on Clarias Gariepinus (Cat Fish)

Chidiebere

2019

BJSTR

View full text Add to dashboard Cite

Section: Resultssupporting

confidence: 86%

Acute Toxicity of Copper and Zinc and their Lethal Concentration on Clarias Gariepinus (Cat Fish)

Chidiebere

2019

BJSTR

View full text Add to dashboard Cite

“…Moreover, whilst iron oxidizing bacteria are widely distributed in environmental systems (particularly in aquatic environments) ( Hedrich et al, 2011 ), they do not appear to be typically associated with eukaryotic hosts and their co-occurrence here with organisms like Nitrosomonas seems counterintuitive given that ammonium oxidation would most likely be inhibited at any pH below 7. That said, earlier reports on fish diseases have, however, documented the association of certain iron bacteria like Leptothrix ochracea Kütz and other unidentified species in association with farmed Trout and Common Carp where they cover the gill lamellae and inhibit respiration by forming insoluble iron deposits ( Schäperclaus, 1992 ; Svobodová et al, 1993 ; Slaninova et al, 2014 ). Furthermore, a more recent report has also indicated the occurrence of other iron-oxidizing bacteria (like Zetaproteobacteria) as epibionts within the gills of deep-sea shrimp ( Jan et al, 2014 ).…”

Section: Discussionmentioning

confidence: 99%

The Inner Workings of the Outer Surface: Skin and Gill Microbiota as Indicators of Changing Gut Health in Yellowtail Kingfish

et al. 2018

View full text Add to dashboard Cite

The mucosal surfaces and associated microbiota of fish are an important primary barrier and provide the first line of defense against potential pathogens. An understanding of the skin and gill microbial assemblages and the factors which drive their composition may provide useful insights into the broad dynamics of fish host–microbial relationships, and may reveal underlying changes in health status. This is particularly pertinent to cultivated systems whereby various stressors may led to conditions (like enteritis) which impinge on productivity. As an economically important species, we assessed whether the outer-surface bacterial communities reflect a change in gut health status of cultivated Yellowtail Kingfish (Seriola lalandi). Active bacterial assemblages were surveyed from RNA extracts from swabs of the skin and gills by constructing Illumina 16S rRNA gene amplicon libraries. Proteobacteria and Bacteroidetes were predominant in both the skin and gills, with enrichment of key β-proteobacteria in the gills (Nitrosomonadales and Ferrovales). Fish exhibiting early stage chronic lymphocytic enteritis comprised markedly different global bacterial assemblages compared to those deemed healthy and exhibiting late stages of the disease. This corresponded to an overall loss of diversity and enrichment of Proteobacteria and Actinobacteria, particularly in the gills. In contrast, bacterial assemblages of fish with late stage enteritis were generally similar to those of healthy individuals, though with some distinct taxa. In conclusion, gut health status is an important factor which defines the skin and gill bacterial assemblages of fish and likely reflects changes in immune states and barrier systems during the early onset of conditions like enteritis. This study represents the first to investigate the microbiota of the outer mucosal surfaces of fish in response to underlying chronic gut enteritis, revealing potential biomarkers for assessing fish health in commercial aquaculture systems.

show abstract

“…The contamination of water and sediment with high concentrations of heavy metals poses a serious threat due to their toxicity, long persistence, bioaccumulation, and biomagnification in the food chain. [ 1 ]. Metals induce early responses in fish, as evidenced by alterations at both structural and functional levels of different organs, including enzymatic and genetic effects, which affect the innate immune system of exposed fish and/or increase susceptibility to multiple types of disease [ 1 , 2 ].…”

Section: Introductionmentioning

confidence: 99%

“…[ 1 ]. Metals induce early responses in fish, as evidenced by alterations at both structural and functional levels of different organs, including enzymatic and genetic effects, which affect the innate immune system of exposed fish and/or increase susceptibility to multiple types of disease [ 1 , 2 ]. The development of oxidative stress is the fundamental molecular mechanism of metal toxicity.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Heavy Metals and the Occurrence of Ulcerative Dermal Necrosis (UDN) in Sea Trout from the RIVER REGA, Poland—Consumer Health Assessment

Rajkowska-Myśliwiec

Protasowicki

Tański

et al. 2022

IJERPH

View full text Add to dashboard Cite

Various factors, including heavy metals, can make fish more susceptible to disease. This study investigated, inter alia, the relationship between Pb, Cd, and Hg contamination of the organs and muscles of sea trout from the river Rega (Poland) and the occurrence of UDN (ulcerative skin necrosis) symptoms. Moreover, the dietary risk of Pb, Cd, and Hg uptake from the muscles of healthy sea trout was assessed based on estimated daily intake (EDI), target hazard quotient (THQ), benchmark dose lower confidence limits (BMDL01 and BMDL10), and tolerable weekly intake (TWI). The metal concentrations varied, depending on the fish organs and the fish condition. A significantly higher amount of Pb was found in the gonads, gills, and muscles, Cd in the kidneys, and Hg in the muscles of sea trout with UDN symptoms. The lowest concentrations of Pb and Cd were detected in the muscles, and of Hg in the gonads. Dietary exposure to Pb, Cd, and Hg accounted for: 0.4% of BMDL01 and 1.0% of BMDL10, 0.56% of TWI, and 16.5% of TWI, respectively. THQs for each metal and the HI value for combined metals were below 1. The weakening of fish due to UDN-like disease probably increased the accumulation of Pb in the gonads, gills, and muscles, and of Cd in the kidneys, of the sea trout. As regards the maximum levels (MRLs), the muscles of healthy sea trout are safe for consumption. The risk assessment suggests no concern for the health of consumers.

show abstract

Water Quality–Disease Relationship on Commercial Fish Farms

Cited by 24 publications

References 71 publications

Acute Toxicity of Copper and Zinc and their Lethal Concentration on Clarias Gariepinus (Cat Fish)

Acute Toxicity of Copper and Zinc and their Lethal Concentration on Clarias Gariepinus (Cat Fish)

The Inner Workings of the Outer Surface: Skin and Gill Microbiota as Indicators of Changing Gut Health in Yellowtail Kingfish

Heavy Metals and the Occurrence of Ulcerative Dermal Necrosis (UDN) in Sea Trout from the RIVER REGA, Poland—Consumer Health Assessment

Contact Info

Product

Resources

About