SILVERING INDEXES FOR SPAWNING MIGRATORY POPULATION OF THE JAPANESE EEL <i>ANGUILLA JAPONICA</i> IN THE YANGTZE RIVER ESTUARY, CHINA

GUO Hong-Yi; ZHENG Li; YE Ya-Meng; TANG Wen-Qiao; ZHANG Ya; Zhang Xu-Guang

doi:10.7541/2019.017

Volume 43 Issue 1

Dec. 2018

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ACTA HYDROBIOLOGICA SINICA > 2019 > 43(1): 133-141. > DOI: 10.7541/2019.017

GUO Hong-Yi, ZHENG Li, YE Ya-Meng, TANG Wen-Qiao, ZHANG Ya, Zhang Xu-Guang. SILVERING INDEXES FOR SPAWNING MIGRATORY POPULATION OF THE JAPANESE EEL ANGUILLA JAPONICA IN THE YANGTZE RIVER ESTUARY, CHINA[J]. ACTA HYDROBIOLOGICA SINICA, 2019, 43(1): 133-141. DOI: 10.7541/2019.017

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SILVERING INDEXES FOR SPAWNING MIGRATORY POPULATION OF THE JAPANESE EEL ANGUILLA JAPONICA IN THE YANGTZE RIVER ESTUARY, CHINA

1.
Shanghai Universities Key Laboratory of Marine Animal Taxonomy and Evolution, Shanghai 201306, China
2.
International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, Shanghai 201306, China
3.
National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China

Funds: Supported by the National Natural Science Foundation of China (31472280)

Received Date: January 09, 2018
Rev Recd Date: May 18, 2018
Available Online: October 11, 2018
Published Date: December 31, 2018

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Abstract

Abstract

To establish a simple and reliable index for determining silvering stages of the Japanese eel, Anguilla japonica, we observed the colorations of various body parts and biological characteristics on the reproductive stock of the eels from the Yangtze River estuary before starting their oceanic migrations. The body color, and age, total length, body weight, and silvering index were analyzed in the silvering process of the Japanese eel. The two silvering stages are characterized by the colorations of trunk skin as follows: (1) Pre-silver stage: pigments deposited completely on the upper edge of pectoral fin on the lateral sides of trunk, (2) Silver stage: pigments deposited completely on the lower edge of pectoral fin on the lateral sides of trunk.The body size, eye diameter, pectoral fins length and gonad-somatic index were increased from pre-silver stage to silver stage, and digestive tract index were decreased in contrast. The principal component analysis demonstrated that the silver stage eels had larger eye and pectoralfins, higher sexual maturity and the degenerated digestive tract compared to pre-silver stage eels. Without feeding, the various modifications of the body and physiological changes indicated that silver eels developed various adaptations to prepare the long oceanic migration. The silver stage and pre-silver stage could be distinguished by canonical discriminant function analysis using five characters with a 95% reliability for correct classification. Our results revealed that an eye index of 5.0 is the cut off point for distinguishing the silver stage from the pre-silver stage of the Japanese eels for the field survey.
- Catadromous migratory population,
- Silvering indexes,
- Discriminant basis,
- Japanese eel,
- the Yangtze River

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References

[1]	Tsukamoto K. Discovery of the spawning area for Japanese eel [J]. Nature, 1992, 356(6372): 789—791 doi: 10.1038/356789a0
[2]	Tsukamoto K. Oceanic migration and spawning of anguillid eels [J]. Journal of Fish Biology, 2009, 74(9): 1833—1852 doi: 10.1111/jfb.2009.74.issue-9
[3]	Tesch F W. The Eel: Biology and Management of Anguillid Eels [M]. London: Chapman and Hall. 2008, 9—78
[4]	Tzeng W, Lin H, Wang C, et al. Differences in size and growth rates of male and female migrating Japanese eels in Pearl River, China [J]. Journal of Fish Biology, 2000, 57(5): 1245—1253 doi: 10.1111/jfb.2000.57.issue-5
[5]	Durif C, Dufour S, Elie P. The silvering process of Anguilla anguilla: a new classification from the yellow resident to the silver migrating stage [J]. Journal of Fish Biology, 2005, 66(4): 1025—1043 doi: 10.1111/jfb.2005.66.issue-4
[6]	Tanaka, H. Progression in artificial seedling production of Japanese eel Anguilla japonica [J]. Fisheries Science, 2015, 81(1): 11—19 doi: 10.1007/s12562-014-0821-z
[7]	Okamura A, Yamada Y, Yokouchi K, et al. A silvering index for the Japanese eel Anguilla japonica [J]. Environmental Biology of Fishes, 2007, 80(1): 77—89 doi: 10.1007/s10641-006-9121-5
[8]	Han Y S, Liao I C, Huang Y S, et al. Synchronous changes of morphology and gonadal development of silvering Japanese eel Anguilla japonica [J]. Aquaculture, 2003, 219(1): 783—796
[9]	Han Y S, Tzeng W N, Huang Y S, et al. Silvering in the eel: changes in morphology, body fat content, and gonadal development [J]. Journal of Taiwan Fisheries Research, 2001, 9(1): 119—127
[10]	Han Y, Tzeng W, Huang Y, et al. The silvering of the Japanese eel Anguilla japonica: season, age, size and fat [J]. Journal of Taiwan Fisheries Research, 2000, 8(1): 37—45
[11]	Ijiri S, Kayaba T, Takeda N, et al. Pretreatment reproductive stage and oocyte development induced by salmon pituitary homogenate in the Japanese eel Anguilla japonica [J]. Fisheries Science, 1998, 64(4): 531—537 doi: 10.2331/fishsci.64.531
[12]	Liao I, Chang S. Induced spawning and larval rearing of Japanese eel, Anguilla japonica in Taiwan [J]. Journal of Taiwan Fisheries Research, 2001, 9(1): 97—108
[13]	Tsukamoto K, Kuroki M. Eels and Humans[M]. Springer. 2014, 117—128
[14]	刘凯, 段金荣, 徐东坡, 等. 长江口日本鳗鲡苗汛特征及捕捞量时空变动. 上海海洋大学学报, 2010, 19(6): 814—821 Liu K, Duan J R, Xu D P, et al. Studies on distribution characteristics and catching indexes fluctuation in fishing season of elvers of Japanese eel in the Yangtze River Estuary [J]. Journal of Shanghai Ocean University, 2010, 19(6): 814—821
[15]	帅方敏, 李智泉, 刘国文, 等. 珠江口日本鳗鲡种苗资源状况研究. 南方水产科学, 2015, 11(02): 85—89 Shuai F M, Li Z Q, Liu G W, et al. Resource status of Japanese eel (Anguilla japonica) in the Pearl River Estuary [J]. South China Fisheries Science, 2015, 11(02): 85—89
[16]	Guo H, Zhang X, Zhang Y, et al. Effects of environmental variables on recruitment of Anguilla japonica glass eels in the Yangtze Estuary, China [J]. Fisheries Science, 2017, 83(3): 333—341 doi: 10.1007/s12562-017-1071-7
[17]	张辛, 许璞, 许广平, 等. 中国东海日本鳗鲡种群遗传结构的AFLP分析. 水生态学杂志, 2010, (1): 82—86 Zhang X, Xu P, Xu G P, et al. Analysis of Genetic Structure of China East Sea Anguilla japonica by AFLP [J]. Chinese Journal of Ecology, 2010, (1): 82—86
[18]	彭喜霞, 黄贝, 段利朋, 等. 日本鳗鲡IFN-γ基因的鉴定、表达模式及启动子活性分析. 水生生物学报, 2017, 41(3): 589—602 Peng X X, Huang B, Duan L P, et al. Characterization, expression pattern and promoter activity analysis of interferon-gamma in Japanese eel, Anguilla japonica [J]. Acta Hydrobiologica Sinica, 2017, 41(3): 589—602
[19]	李春艳, 黄贝, 熊静, 等. 日本鳗鲡TLR21基因的鉴定、免疫应答与启动子分析. 水生生物学报, 2017, 41(2): 296—305 Li C Y, Huang B, Xiong J, et al. Molecular cloning and characterization of TLR21 gene from Japanese eel, Anguilla japonica [J]. Acta Hydrobiologica Sinica, 2017, 41(2): 296—305
[20]	Guo H Y, Zheng Y, Tang W Q, et al. Behavioral migration diversity of the Yangtze River Japanese Eel, Anguilla japonica, based on otolith Sr/Ca ratios [J]. Zoological Research, 2011, 32(4): 442—450
[21]	郭弘艺, 魏凯, 唐文乔, 等. 中国东南沿海日本鳗鲡幼体的发育时相及其迁徙路径分析. 水产学报, 2012, 36(12): 1793—1801 Guo H Y, Wei K, Tang W Q, et al. Developmental stages and migratory routes of larvae Japanese eel from southeast coastal estuaries of China [J]. Journal of Fisheries of China, 2012, 36(12): 1793—1801
[22]	汪德海, 龚小玲, 鲍宝龙, 等. 长江口降海洄游日本鳗鲡的生长特性. 上海海洋大学学报, 2016, 25(1): 25—33 Wang D H, Gong X L, Bao B L, et al. The growth characteristics of catadromous Japanese eels (Anguilla japonica) from the Yangtze River Estuary, China [J]. Journal of Shanghai Ocean University, 2016, 25(1): 25—33
[23]	郭弘艺, 张亚, 唐文乔, 等. 长江口日本鳗鲡幼体色素发育时相及其体型变化. 水生生物学报, 2015, 39(1): 197—202 Guo H Y, Zhang Y, Tang W Q. Pigmentation stages and body proportions of Anguilla japonica glass eels at the Yangtze River Estuary [J]. Acta Hydrobiologica Sinica, 2015, 39(1): 197—202
[24]	胡达吾. 长江口日本鳗鲡(Anguilla Japonica Temminck et Schlegel)补充群体早期生活史研究. 上海海洋大学. 2012 Hu W D. Research on early life history of Anguilla japonica temmink et schlegel recruitment in Yangtze Estuary [D]. Shanghai Ocean University. 2012
[25]	Han Y S, Tzeng W N, Liao I C. Gonadotropin induced synchronous changes of morphology and gonadal development in the Japanese eel Anguilla japonica [J]. Journal of Fisheries Society of Taiwan, 2007, 33(4): 333—343
[26]	林鼎, 林浩然, 黄奕华, 等. 鳗鲡繁殖生物学研究——Ⅰ.下海鳗鲡雌雄性状差异和鉴别. 水生生物学报, 1977, 1(2): 177—190 Lin D, Lin H R, Huang Y H, et al. Studies on the breeding biology of the eel (Anguilla japonica Temminck Schlegel) [J]. Acta Hydrobiologica Sinica, 1977, 1(2): 177—190
[27]	Pankhurst N. Relation of visual changes to the onset of sexual maturation in the European eel Anguilla anguilla (L.) [J]. Journal of Fish Biology, 1982, 21(2): 127—140 doi: 10.1111/jfb.1982.21.issue-2
[28]	谢正丽, 郭弘艺, 唐文乔, 等. 长江口降海洄游鳗鲡的年龄结构与生长特征. 水产学报, 2010, 34(2): 245—254 Xie Z L, Guo H Y, Tang W Q, et al. Age structure and growth characteristics at seaward migrating periods of Anguilla japonica in the Yangtze River Estuary [J]. Journal of Fisheries of China, 2010, 34(2): 245—254
[29]	Acou A, Boury P, Laffaille P, et al. Towards a standardized characterization of the potentially migrating silver European eel (Anguilla anguilla, L.) [J]. Archiv für Hydrobiologie, 2005, 164(2): 237—255 doi: 10.1127/0003-9136/2005/0164-0237
[30]	Pankhurst N, Lythgoe J. Structure and colour of the integument of the European eel Anguilla anguilla (L.) [J]. Journal of Fish Biology, 1982, 21(3): 279—296 doi: 10.1111/jfb.1982.21.issue-3
[31]	Lokman P M, Vermeulen G J, Lambert J G, et al. Gonad histology and plasma steroid profiles in wild New Zealand freshwater eels (Anguilla dieffenbachii and A. australis) before and at the onset of the natural spawning migration. I. Females [J]. Fish Physiology and Biochemistry, 1998, 19(4): 325—338 doi: 10.1023/A:1007719414295
[32]	Cottrill R D, McKinley R S, Kraak G D. An examination of utilizing external measures to identify sexually maturing female American eels, Anguilla rostrata, in the St. Lawrence River [J]. Environmental Biology of Fishes, 2002, 65: 271—287 doi: 10.1023/A:1020502119936
[33]	Tsukamoto K, Chow S, Otake T, et al. Oceanic spawning ecology of freshwater eels in the western North Pacific [J]. Nature communications, 2011, 1174(2): 179—187
[34]	Davey A, Jellyman D. Sex determination in freshwater eels and management options for manipulation of sex [J]. Reviews in Fish Biology and Fisheries, 2005, 15: 37—52 doi: 10.1007/s11160-005-7431-x

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SILVERING INDEXES FOR SPAWNING MIGRATORY POPULATION OF THE JAPANESE EEL ANGUILLA JAPONICA IN THE YANGTZE RIVER ESTUARY, CHINA

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