Variation of Lipids and Fatty Acids of the Japanese Freshwater Eel, &lt;i&gt;Anguilla japonica&lt;/i&gt;, during Spawning Migration

Saito, Hiroaki; Kurogi, Hiroaki; Chow, Seinen; Mochioka, Noritaka

doi:10.5650/jos.ess14293

Cited by 9 publications

(8 citation statements)

References 36 publications

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“…18.1%) than in the current study was also detected in farmed and freshwater eel ( Monopterus albus ) muscle [ 40 ]. A varying lipid content (3.6–20.4%) resulting from the catching season and location was proved for freshwater eel ( A. japonica ) muscle [ 41 ], as well as from comparing A. japonica individuals in the initial and terminal stages of spawning migration (0.3–20.6%) [ 42 ].…”

Section: Resultsmentioning

confidence: 99%

“…Previous studies also account for the lipid class analysis of the edible tissues of other eel species. Thus, Saito et al [ 42 ] compared the lipid class composition of the initial and terminal stages of spawning migration of wild Japanese freshwater eel ( A. japonica ) muscle; as a result, TAGs were the major component in the initial-phase eels, but presented a remarkable content decrease in individuals corresponding to the terminal phase. A comparative study of the lipid class profile in both wild and cultivated individuals of the Japanese eel ( A. japonica ) was carried out by Oku et al [ 39 ]; both in wild and cultivated individuals, TAGs were shown to be the most abundant lipid class of muscle (67.9–68.2%); other lipid classes detected were sterylesters (9.5–10.2%), FFAs (9.9–11.2%), STs (4.5%), PC (2.3–2.4%), and phosphatidylethanolamine (1.2–1.5%).…”

Section: Resultsmentioning

confidence: 99%

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The Presence of Bioactive Compounds in European Eel (Anguilla anguilla) Skin: A Comparative Study with Edible Tissue

Bote,

Trigo,

Martínez

et al. 2024

Marine Drugs

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The presence of bioactive compounds in European eel (Anguilla anguilla) skin was studied. Proximate and lipid class compositions and analysis of the fatty acid (FA) profile (individual FAs; FA groups, i.e., saturated, monounsaturated, and polyunsaturated; FA ratios, i.e., polyunsaturated/saturated, ω3/ω6) were determined and compared to the composition of the eel muscle. As a result, higher (p < 0.05) levels of proteins (271.6 g·kg−1), lipids (38.0 g·kg−1), ash (27.7 g·kg−1), and ω6 FAs were observed in the skin tissue. Contrary, the muscle tissue showed higher (p < 0.05) moisture, ω3 FA, and ω3/ω6 ratio values. Regarding lipid classes, a higher (p < 0.05) proportion of phospholipids (111.1 g·kg−1 lipids), free sterols (104.7 g·kg−1 lipids), α-tocopherol (274.0 mg·kg−1 lipids), and free FAs (43.6 g·kg−1 lipids) was observed in the skin tissue. No differences (p > 0.05) between both tissues could be detected for triacylglycerol and FA group (saturated, monounsaturated, and polyunsaturated) values and for the polyunsaturated/saturated FA ratio. It is concluded that European eel skin, a by-product resulting from commercial processing, can be considered a valuable source for the food and pharmaceutical industries by providing value-added constituents such as proteins, lipids, ω3 FAs, phospholipids, and α-tocopherol.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

The Presence of Bioactive Compounds in European Eel (Anguilla anguilla) Skin: A Comparative Study with Edible Tissue

Bote,

Trigo,

Martínez

et al. 2024

Marine Drugs

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“…The body lipid content of eel fish needed to promote metamorphosis and gonad maturity is above 28% [30]. Therefore, mature eel (silver eel) often delays migration to sea waters before enough lipid content [31]. Body lipid of A. japonica decreases during migration from freshwater to seawater at spawning [32].…”

Section: Body Compositionmentioning

confidence: 99%

“…Eels will migrate to spawn after reaching puberty (silver eel) from freshwater to seawater so that eels will expose changes in salinity. Morphological and physiological changes [31,36] include body color, head shape, eye diameter, and pectoral fin length [1].…”

Section: Body Compositionmentioning

confidence: 99%

Biochemical composition of tropical eel Anguilla bicolor McClelland,1844 in Freshwater and Estuary

Rachmawati

Susilo

2021

E3S Web Conf.

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During migration, Anguilla bicolor will stop its feeding activity and use energy from its body lipid stores. Therefore, information on changes in the body lipid content of eels is essential to know the preparation of spawning migration. Thus, it is interesting to study the body composition of A. bicolor in freshwater and estuaries. This research conducted a survey method. The eel was obtained from the Serayu River (freshwaters) and Segara Anakan (Estuary). The observed variables were water, dry weight, lipid, protein, crude fiber, ash, and BETN of eel. Oneway ANOVA analyzed data. The results show that freshwater eels' average body length and weight were 457.875 cm ± 153.8552 and 224.4375 g ± 165.3735. The body length and weight of the estuary eels were smaller than freshwater eels, which are 372.5714 cm ± 152.6467 and 109.6429 g ± 134.6054, respectively. The body composition of eel, except for lipid content, was similar for both habitats (p>0.05). However, the body lipid content of freshwater eels and the estuarine eel differed (p<0.05), namely 40.15% ± 9.63 and 27.33% ± 9.93, respectively. In conclusion, the lipid body content of freshwater eels was higher than the estuary eel, while another is relatively the same.

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“…The reported ranges for moisture, protein, and lipid ratios in European eels were 60-73%, 15-20%, and 4-30%, respectively (Schreckenbach et al, 2001;Lupatsch et al, 2003;Özogul et al, 2005;Özogul et al, 2014;Gomez-Limia et al, 2021;Tunçelli et al, 2022). Few research reported that European eels accumulate lipids before spawning and that lipid levels increase as the fish grows (Larsson et al, 1990;Saito et al, 2015;van Ginneken et al, 2018). Larsson et al (1990) also reported that the lipid content of European eel muscle tissue increases while the yellow eel's metamorphosis into silver eels.…”

Section: Introductionmentioning

confidence: 99%

Quality Changes of European Eel (Anguilla anguilla) Stored Under Refrigerated Conditions at 2±1°C

Genç

Bahrioğlu

2023

Marine Science and Technology Bulletin

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This study aims to determine microbiological, sensory and color changes of whole European eel (Anguilla anguilla) aerobically stored at 2.00±1.00°C for 19 days. Samples were analyzed with periodical intervals in terms of Total Mesophilic Aerobic Bacteria (TMAB), Total Psychrophilic Aerobic Bacteria (TPAB), Psedumonas sp. and Lactic Acid Bacteria (LAB). For the sensory analysis, samples were evaluated to describe the changes in skin color and mucus, eyes shape and clarity, texture and odor. Description of color changes consisted of L*, a*, b*, ∆E, chroma and hue angle during the storage period. The count of TMAB, TPAB, Pseudomonas sp. and LAB were found to be 1.53±0.08; 1.08±0.12; 1.15±0.21 and 1.15±0.21 log cfu/g, respectively. Significant differences were not found for the first 2 days of the storage for any microbiological parameters (p>0.05). At the end of the storage time, the counts of microorganisms were significantly increased (p

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Variation of Lipids and Fatty Acids of the Japanese Freshwater Eel, <i>Anguilla japonica</i>, during Spawning Migration

Cited by 9 publications

References 36 publications

The Presence of Bioactive Compounds in European Eel (Anguilla anguilla) Skin: A Comparative Study with Edible Tissue

The Presence of Bioactive Compounds in European Eel (Anguilla anguilla) Skin: A Comparative Study with Edible Tissue

Biochemical composition of tropical eel Anguilla bicolor McClelland,1844 in Freshwater and Estuary

Quality Changes of European Eel (Anguilla anguilla) Stored Under Refrigerated Conditions at 2±1°C

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