Comparative lipid dynamics of euphausiids from the Antarctic and Northeast Pacific Oceans

Ju, Se‐Jong; Kang, Hyung-Ku; Kim, Woong Seo; Harvey, H. Rodger

doi:10.1007/s00227-009-1186-1

Cited by 23 publications

(13 citation statements)

References 49 publications

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“…These contents were in agreement with the composition given by the KO producer for PLs (>46 %) and TAGs (<50 %), while information of the minor compound content was not indicated. These results are in good agreement with previous report by Tandy et al (2009), Phleger et al (1998), and Ju et al (2009) for different KO samples. These authors found values of 23 and 58 %, 37 and 51 %, and 38 and 55.4 % for TAGs and PLs, respectively.…”

Section: Resultssupporting

confidence: 96%

“…These authors found values of 23 and 58 %, 37 and 51 %, and 38 and 55.4 % for TAGs and PLs, respectively. Moreover, percentage values reported for CHOL+ FFA of 0.9 % (Phleger et al 1998) and 0.6 % (Ju et al 2009) were also comparable to the values observed in this study. Regarding the relative levels of the individual PL, amounts of PE, PC, and SM were found showing values of <0.1, 99.7, and 0.2 %, respectively, related to the total PL (Table 1).…”

Section: Resultssupporting

confidence: 93%

“…Hence, our results for these variables are consistent with these existing studies. Likewise, the value of 0.14 obtained for the omega-6/omega-3 ratio in this study was in the same range as those reported previously in other studies by Ju et al (2009) and Kassis et al (2012). The same happened for the EPA/DHA ratio of 2.9:1, which was in agreement with the value reported for the KO manufacturer of 2.5:1 and Ju et al (2009) with 2.8:1 and somewhat higher than the value reported by Kolakowska et al (1994) and Araujo et al (2014) of 2:1 in comparable samples.…”

Section: Fame Analysis By Gc-ms Of Krill Oil and Fractionssupporting

confidence: 90%

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Comprehensive Study of the Lipid Classes of Krill Oil by Fractionation and Identification of Triacylglycerols, Diacylglycerols, and Phospholipid Molecular Species by Using UPLC/QToF-MS

et al. 2015

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Krill oil represents an interesting source of bioactive lipid components, being suitable as a functional ingredient. This oil is characterized by its high concentration of longchain omega-3 fatty acids, especially eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). The contents of EPA and DHA were similar to those in fish oils, but with the difference that almost the half are located in phospholipids (mainly phosphatidylcholine). This might explain its higher absorption and bioavailability. This highly unsaturated oil maintains stable due to the presence of astaxanthin, a potent antioxidant, which assures the stability of the omega-3 fatty acids. However, there is lack of investigations reporting a deep comprehensive description of the krill oil (KO) lipid composition. The characterization includes new data of its neutral and polar components and the identification of triacylglycerols, diacylglycerols, and molecular species that has been done by different chromatographic techniques as gas chromatography-mass spectrometry/flame ionization detector (GC-MS/ FID), flash chromatography-evaporative light scattering detector (FC-ELSD), and HPLC-ELSD. Also phospholipid molecular species by using ultraperformance liquid chromatography/quadruple-time-of-flight mass spectrometry (UPLC/QToF-MS) have been determined.

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Section: Resultssupporting

confidence: 96%

Section: Resultssupporting

confidence: 93%

Section: Fame Analysis By Gc-ms Of Krill Oil and Fractionssupporting

confidence: 90%

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Comprehensive Study of the Lipid Classes of Krill Oil by Fractionation and Identification of Triacylglycerols, Diacylglycerols, and Phospholipid Molecular Species by Using UPLC/QToF-MS

et al. 2015

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“…Total lipid extracts were then saponified with 0.5 N methanolic KOH at 70°C for 30 to 60 min (Ju et al 2009). Neutral lipids were partitioned 3 times with a mixture of hexane:diethyl ether (9:1) after addition of water and archived for subsequent analysis.…”

Section: Methodsmentioning

confidence: 99%

“…The 3 extracts were combined, and excess solvent was removed by rotary evaporation. Total lipid extracts were flushed with nitrogen and stored in CH 2 Cl 2 at −20°C.Total lipid extracts were then saponified with 0.5 N methanolic KOH at 70°C for 30 to 60 min (Ju et al 2009). Neutral lipids were partitioned 3 times with a mixture of hexane:diethyl ether (9:1) after addition of water and archived for subsequent analysis.…”

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confidence: 99%

Fatty acids and stable isotopes as indicators of early-life feeding and potential maternal resource dependency in the bull shark Carcharhinus leucas

Belicka¹,

Matich²,

Jaffé³

et al. 2012

Mar. Ecol. Prog. Ser.

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The degree of reliance of newborn sharks on energy reserves from maternal resource allocation and the timescales over which these animals develop foraging skills are critical factors towards understanding the ecological role of top predators in marine ecosystems. We used muscle tissue stable carbon isotopic composition and fatty acid analysis of bull sharks Carcharhinus leucas to investigate early-life feeding ecology in conjunction with maternal resource dependency. Values of δ 13 C of some young-of-the-year sharks were highly enriched, reflecting inputs from the marinebased diet and foraging locations of their mothers. This group of sharks also contained high levels of the 20:3ω9 fatty acid, which accumulates during periods of essential fatty acid deficiency, suggesting inadequate or undeveloped foraging skills and possible reliance on maternal provisioning. A loss of maternal signal in δ 13C values occurred at a length of approximately 100 cm, with muscle tissue δ 13 C values reflecting a transition from more freshwater/estuarine-based diets to marine-based diets with increasing length. Similarly, fatty acids from sharks >100 cm indicated no signs of essential fatty acid deficiency, implying adequate foraging. By combining stable carbon isotopes and fatty acids, our results provided important constraints on the timing of the loss of maternal isotopic signal and the development of foraging skills in relation to shark size and imply that molecular markers such as fatty acids are useful for the determination of maternal resource dependency. KEY WORDS: Essential fatty acid deficiency · Fatty acids · Food webs · Maternal investment · Stable isotopes · Sharks Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 455: [245][246][247][248][249][250][251][252][253][254][255][256] 2012 man et , Torres-Rojas et al. 2010, to molecular tools including stable isotope and lipid biomarker analysis (MacNeil et al. 2005, Pethybridge et al. 2010, Wai et al. 2011. Although stomach content analysis can provide evidence for specific dietary items, biochemical approaches have the advantage of providing information on assimilated organic substrates and can be especially helpful in complex ecosystems with multiple organic carbon substrates (Dalsgaard et al. 2003, Iverson et al. 2004, Whiles et al. 2010. Bulk δ 13 C has been widely used for food web studies, providing information on the source of organic matter in food webs (Fry et al. 1978, Fry & Sherr 1984, McCutchan et al. 2003. Furthermore, stable isotopic composition of neonatal animals has been demonstrated to reflect maternal diet and foraging location instead of neonatal diet, and this complication must be considered when interpreting isotope values in neonates and juveniles, especially for tissues with slow isotopic turnover times (e.g. muscle tissue in elasmobranchs; MacNeil et al. 2005, Olin et al. 2011. Fatty acid signatures are particularly useful for dietary studies because fatty acids from a prey item are taken up i...

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Trophic position and partitioning differences between euphausiid species in the Southern California Current and eastern tropical North Pacific using stable isotope ratios (δ13C and δ15N), elemental composition, and lipid contents

Lorda

Murcia-Riaño

2021

Mar Biol

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Comparative lipid dynamics of euphausiids from the Antarctic and Northeast Pacific Oceans

Cited by 23 publications

References 49 publications

Comprehensive Study of the Lipid Classes of Krill Oil by Fractionation and Identification of Triacylglycerols, Diacylglycerols, and Phospholipid Molecular Species by Using UPLC/QToF-MS

Comprehensive Study of the Lipid Classes of Krill Oil by Fractionation and Identification of Triacylglycerols, Diacylglycerols, and Phospholipid Molecular Species by Using UPLC/QToF-MS

Fatty acids and stable isotopes as indicators of early-life feeding and potential maternal resource dependency in the bull shark Carcharhinus leucas

Trophic position and partitioning differences between euphausiid species in the Southern California Current and eastern tropical North Pacific using stable isotope ratios (δ13C and δ15N), elemental composition, and lipid contents

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