Antarctic krill (Euphausia superba) as a bioindicator of trace elements reflects regional heterogeneity in marine environments in the northern Antarctic Peninsula, Antarctic

Wang, Danrong; Zhu, Guoping

doi:10.1016/j.ecolind.2022.108596

Cited by 9 publications

(3 citation statements)

References 71 publications

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“…Nonetheless, interestingly, the total FA contents of the CB and AS samples were about thrice higher than those in the WB and TI samples (mean dry mass %, CB = 44.63 ± 14.22, AS = 39.25 ± 16.93, WB = 9.22 ± 7.07 and TI = 9.69 ± 3.80). Considering the heterogeneity of the environments in which C. wilsoni was collected (Orsi et al , 1995; Wang & Zhu, 2022 and among others), the authors suggested that the differences in total FA contents in C. wilsoni may result from a difference in their buoyancy requirements. A typical characteristic of notothenioid species is the lack of swim bladders, so that they require other means of buoyancy regulation; one common strategy is to accumulate lipids (DeVries & Eastman, 1981; Eastman & DeVries, 1982; Eastman & Devries, 1989; Hazel & Sidell, 2004).…”

Section: Discussionmentioning

confidence: 99%

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Biological–physical processes regulate autumn prey availability of spiny icefish Chaenodraco wilsoni in the Bransfield Strait, Antarctic

Qing-yuan

Reid

Zhu

2022

Journal of Fish Biology

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This study examines the adaptability of a Southern Ocean predator, which is dependent on Antarctic krill (Euphausia superba), to potential changes in food availability. Muscle fatty acids (FAs) of the spiny icefish Chaenodraco wilsoni collected from three areas in the Bransfield Strait (BS), northern Antarctic Peninsula during February-April 2016 give a good representation of their feeding variability. The compositions of 22:6n3 (DHA) and 20:5n3 (EPA) were both higher in the Transitional Zonal Water with Bellingshausen influence (TBW)-controlled C. wilsoni than in the Transitional Zonal Water with Weddell Sea influence (TWW)-controlled fish. This was positively correlated with photoadaptation and carbon sequestration in TBW-controlled phytoplankton. Results for the FAs 16:1n7, 16:0, DHA and EPA indicate the presence of dinoflagellates in all three areas, suggesting that during late summer and early fall, there is a seasonal phytoplankton succession, where small phytoplankton become dominant, in the BS. In addition, the compositions of some long-chain FAs (>20, such as 20:0, 20:1, 22:0 and 22:1n9) and P 18 indicated that the food chain based on flagellates and copepods was more apparent in TWW-controlled C. wilsoni, especially the effect of El Niño-Southern Oscillation (ENSO) on the variation of prey communities in TWW-controlled areas. FA markers such as SFA/(PUFA+MUFA), P 15 + P 17 and ARA were more pronounced in TWW-controlled C. wilsoni, indicating a more strongly carnivorous and benthic food source. In the TBW-TWW confluence, the complex hydrological structure, including the presence of a large number of mesoscale eddies, allows rich nutrients and krill larvae to remain in it, providing a rich food source for the C. wilsoni. Overall, the FA data of this study show that the diet of C. wilsoni varies in different marine environments, aiding their survivability at the face of climate change.

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Section: Discussionmentioning

confidence: 99%

“…The authors have assessed the diet of C. wilsoni in different water masses in BS using FA biomarkers and described the possible causes of these differences, reflecting the importance of hydrography in governing trophic availability of aquatic animals (Wang & Zhu, 2022). C. wilsoni under TBW control ( i.e.…”

Section: Discussionmentioning

confidence: 99%

Biological–physical processes regulate autumn prey availability of spiny icefish Chaenodraco wilsoni in the Bransfield Strait, Antarctic

Qing-yuan

Reid

Zhu

2022

Journal of Fish Biology

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“…LC‐ω‐3 PUFAs have anti‐inflammatory properties that can prevent Alzheimer's disease and metabolic illnesses (Araya‐Quintanilla et al ., 2020). Antarctic krill ( Euphausia superba ) oil (AKO) is a safe sources of LC‐ω‐3 PUFAs (Xie et al ., 2019; Wang & Zhu, 2022). Approximately 70% LC‐ω‐3 PUFAs in AKO are esterified in phospholipids which are highly bioavailable and pass through cell membranes easier than triacylglycerols (Showman et al ., 2020; Xiang et al ., 2021).…”

Section: Introductionmentioning

confidence: 99%

Encapsulation of Antarctic krill oil and kaempferol co‐loaded nano‐liposomes in alginate‐chitosan hydrogel beads: improved stability and modified digestive behaviour

Li,

Liu

2024

Int J of Food Sci Tech

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SummaryIn this study, alginate (NaAlg) and/or chitosan (CS) hydrogel beads were prepared to encapsulate Antarctic krill oil (AKO) and kaempferol (KL) co‐loaded nano‐liposomes. The SEM study confirmed that the hydrogel beads were spherical, in which nano‐liposomes was distributed evenly within the polymer network. The FTIR spectra indicated no evidence of any chemical interaction between nano‐liposomes and hydrogel beads. The hydrogel beads especially the NaAlg‐CS hydrogel beads caused decrease in the release of KL and AKO mostly own to the improved density of bead microstructure. Furthermore, the network structure in the hydrogel beads especially the NaAlg‐CS hydrogel beads successfully insulated oxygen to improve AKO oxidation stability and protected KL by preventing degradation under natural light, while maintaining its antioxidant capacity. Importantly, the hydrogel beads significantly reduced the release of free fatty acids during in vitro digestion compared to nano‐liposomes. In principle, these new delivery systems may combine the benefits of nano‐liposomes and hydrogel beads to encapsulate AKO and KL and broaden their applicability in food industry.

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Influences of replacing dietary fish meal by Antarctic krill meal on growth performance, immunity and muscle quality of white shrimp Litopenaeus vannamei

Wei

Wang

Xie

et al. 2022

Aquaculture Reports

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Antarctic krill (Euphausia superba) as a bioindicator of trace elements reflects regional heterogeneity in marine environments in the northern Antarctic Peninsula, Antarctic

Cited by 9 publications

References 71 publications

Biological–physical processes regulate autumn prey availability of spiny icefish Chaenodraco wilsoni in the Bransfield Strait, Antarctic

Biological–physical processes regulate autumn prey availability of spiny icefish Chaenodraco wilsoni in the Bransfield Strait, Antarctic

Encapsulation of Antarctic krill oil and kaempferol co‐loaded nano‐liposomes in alginate‐chitosan hydrogel beads: improved stability and modified digestive behaviour

Influences of replacing dietary fish meal by Antarctic krill meal on growth performance, immunity and muscle quality of white shrimp Litopenaeus vannamei

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