Inter-annual occurrence variation of the large jellyfish Nemopilema nomurai due to the changing marine environment in the East China Sea

Yoon, Eun–A; Cha, Cheolpyo; Hwang, Doo–Jin; Yoon, Yang Ho; Shin, Hyeong-Ho; Gwak, Du-Seong

doi:10.3796/ksft.2012.48.3.242

Cited by 9 publications

(5 citation statements)

References 17 publications

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“…The common bloom-formers jellyfish Aurelia coerulea and Nemopilema nomurai are of major concern, as they heavily impair fisheries, clog the intake water screens of nuclear electric power plants, and can produce envenomation events [10][11][12][13]. The first Scyphozoan belong to the moon jellyfish genus Aurelia, which has long been considered cosmopolitan and able of local adaptation due to its phenotypic plasticity [14].…”

Section: Introductionmentioning

confidence: 99%

Contrasting Effects of Regional and Local Climate on the Interannual Variability and Phenology of the Scyphozoan, Aurelia coerulea and Nemopilema nomurai in the Korean Peninsula

et al. 2021

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The East Asian marginal seas are among the most productive fisheries grounds. However, in recent decades they experienced massive proliferations of jellyfish that pose vast challenges for the management of harvested fish stocks. In the Korean Peninsula, the common bloom-formers Scyphozoan species Aurelia coerulea and Nemopilema nomurai are of major concern due to their detrimental effects on coastal socio-ecological systems. Here, we used pluriannual field observations spanning over 14 years to test the extent of climate influence on the interannual variability and bloom dynamics of A. coerulea and N. nomurai. To depict climate-jellyfish interactions we assessed partitioning effects, direct/indirect links, and the relative importance of hydroclimate forces on the variability of these species. We show that jellyfish interannual patterns and bloom dynamics are shaped by forces playing out at disparate scales. While abundance changes and earlier blooms of A. coerulea were driven by local environmental conditions, N. nomurai interannual patterns and bloom dynamics were linked with regional climate processes. Our results provide a synoptic picture of cascading effects from large scale climate to jellyfish dynamics in the Korean Peninsula that may affect fisheries sustainability due to the prominent detrimental impact these species have in the region.

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Section: Introductionmentioning

confidence: 99%

Contrasting Effects of Regional and Local Climate on the Interannual Variability and Phenology of the Scyphozoan, Aurelia coerulea and Nemopilema nomurai in the Korean Peninsula

et al. 2021

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“…The range of frequency difference used to extract signals from N. nomurai was determined using 2.2 dB ∆MVBS 5.6 dB to obtain the echo signals [2]. Furthermore, the target strength used in estimating the density of N. nomurai was obtained using TS 10logπ D/2 83.15 [16].…”

Section: Acoustic Data Analysismentioning

confidence: 99%

“…A total of 107 jellyfish individuals were counted, and N. nomurai were mainly distributed at 10 m deep. The density of N. nomurai measured at different time periods was the highest at the fifth trial (i.e., 33.75 (10 −4 •ind/m)) and the lowest at the The range of frequency difference used to extract signals from N. nomurai was determined using −2.2 dB < ∆MVBS 120−38 kHz < 5.6 dB to obtain the echo signals [2]. Furthermore, the target strength used in estimating the density of N. nomurai was obtained using TS 120 kHz = 10log π(D/2) 2 − 83.15 [16].…”

Section: Vertical Distribution Of N Nomuraimentioning

confidence: 99%

“…Owing to global warming, the water temperature is increasing, and N. nomurai, known to originate from the coastal waters of China, has been migrating into Korea's coastal waters, causing direct and indirect damages to the fishery and maritime industries [1,2]. In general, the occurrence of jellyfish decreases the catch level of fish and the freshness of fish caught, causing serious economic repercussions to the fishery industry; in addition, it can cause sea bathers to experience jellyfish stings, which can result in a number of socio-economic problems [3,4].…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Distribution and Density of Nemopilema nomurai by Water Columns Using Echo Counting and Echo Integration Methods

Kim

Lim

Chae³

et al. 2020

Sustainability

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In this study, the distribution of Nemopilema nomurai in the waters of Mijo-myeon, Namhae and Gijang-gun, Busan was analyzed; furthermore, echo counting and echo integration methods were used to compare the distribution density. The acoustic system used in the study was a split beam scientific echosounder operating at 38 and 120 kHz (EK-60, Simrad, Norway). Echo counting and echo integration methods were used to determine the density of N. nomurai distributed in the survey areas. The distribution of N. nomurai by water columns, estimated using an echo counting method, was concentrated at approximately 10 m deep in the waters of Mijo, Namhae and 10–50 m deep in the waters of Gijang, Busan; moreover, the distributed depth varied by the surveyed date and time. It was shown that analyzing the acoustic scattering strength of jellyfish obtained from the echo counting method would be more effective for distributional survey of N. nomurai with two frequency system.

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“…(Feigenbaum and Kelly, 1984;Verity and Smetacek, 1996;Schneider and Behrends, 1998;Jankowski et al, 2005; Uye and Shimauchi, 2005;NFRDI, 2013;Yoon et al 2012), , , , , (Lynam et al, 2005;Masuda et al, 2007;Richardson et al, 2009) , (Yasuda, 2004;Tibballs et al, 2011;Kim et al, 2014), (Purcell et al,2007;Kim, 2012) , (Graham, 2003;Kim et al, 2012;Kim et al, 2014;Palmieri et al, 2014) . , (Kawahara et al, 2006) , , , (Omori and Nakano, 2001), , (Fenner, 1997).…”

mentioning

confidence: 99%

Food Component Characterization and Efficient Use of Jellyfish

Lim¹

2014

Korean Journal of Fisheries and Aquatic Sciences

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The recent mass appearances of jellyfish in Korea have caused economic and social damage, as they plague swimmers and fishermen. However, jellyfish have high economic and nutritional value, and contain low levels of calories and hydrolysates. Thus, jellyfish are a natural, healthy food that can improve high blood pressure, bronchitis, and a multitude of other diseases. Here, we present research on the ecology, classification, bloom, damage caused, food component characterization, and tissues of jellyfish, with the aim of facilitating further study. Research on use of jellyfish as salted products, and for collagen and qniumucin would also be valuable. A jellyfish body is classified into three parts: the body, termed the umbrella; the oral arm; and the tentacle. Jellyfish are planktonic marine members of a group of invertebrate animals comprising the classes Schypozoa (phylum Cnidaria) and Cuboza. In Korea in 2012, jellyfish damage resulted in decreases of annual catch and commercial value estimated at 177 and 141 billion won, respectively. Because concentrations of heavy metals are below the safety limits for seafood, dried jellyfish appear to be safe raw materials for food. The proximate compositions of Nemopilema nomurai and Aurelia aurita were 97.1% and 96.5% moisture, 0.9% and 1.2% crude proteins, undetected and 0.1% crude lipids, and 1.7% and 1.8% ash, respectively. According to their total contents of essential, total, and non-essential amino acids, jellyfish gonads were deemed good-quality protein. Because the major functional components of jellyfish are collagen and qniumucin, jellyfish can be used salted, or these components of healthy diets can be extracted from them. For more effective use of jellyfish, unit costs should be decreased and safety guaranteed. Additionally, dehydrators attached to conveyor belts should be developed. Since jellyfish can be used throughout the year, they should be listed in the Korean Food Standards Codex as a food source.

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Inter-annual occurrence variation of the large jellyfish Nemopilema nomurai due to the changing marine environment in the East China Sea

Cited by 9 publications

References 17 publications

Contrasting Effects of Regional and Local Climate on the Interannual Variability and Phenology of the Scyphozoan, Aurelia coerulea and Nemopilema nomurai in the Korean Peninsula

Contrasting Effects of Regional and Local Climate on the Interannual Variability and Phenology of the Scyphozoan, Aurelia coerulea and Nemopilema nomurai in the Korean Peninsula

Comparison of Distribution and Density of Nemopilema nomurai by Water Columns Using Echo Counting and Echo Integration Methods

Food Component Characterization and Efficient Use of Jellyfish

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