Analyzing historic human-suid relationships through dental microwear texture and geometric morphometric analyses of archaeological suid teeth in the Ryukyu Islands

Using salinity database of World Ocean Atlas 2009 (WOA09) issued by NOAA in 2010, refer the range of high-salinity tongue to indicate the strength about high-salinity water, from the perspective of structural changes of salinity; the water exchange through Ryukyu Islands upper 500 m have been analyzed, the results show that: due to Ryukyu Trough, currents on both sides of Ryukyu Islands occur exchange, for upper 500 m, high-salinity water in east of the Ryukyu Islands mainly invade the west waterthe Kuroshio in East China Sea; the intrusion strength is powerful from the depth of 100 m to 200 m, and the 150 m layer is the core layer of high-salinity water intrusion; the high-salinity water at the east of Ryukyu Islands invades the Kuroshio are stronger in March, May, June, September, October and November, are weaker in April and December.

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The comparative yields of two types of leucaena (Peruvian v. Hawaiian) grown for forage production in Ryukyu Islands

The Journal of Agricultural Science ◽

10.1017/s0021859600063504 ◽

1986 ◽

Vol 106 (3) ◽

pp. 623-624 ◽

Cited By ~ 1

Author(s):

Y. Kitamura

Keyword(s):

Leucaena Leucocephala ◽

Ryukyu Islands ◽

Forage Production ◽

High Quality ◽

The Ryukyu Islands

Leucaena leucocephala (Lam.) de Wit, a leguminous shrub, has come into use as a fodder plant for animals in the Ryukyu Islands as it provides highly palatable, high quality feed (Kitamura, 1985). It is superior to other feeds available in this regard (Higashiohmine, Aramoto & Yamashiro, 1971; Isa et al. 1982).

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Carbon and Oxygen Isotope Records of Tridacna squamosa Shells from two Different Latitudes in the Ryukyu Islands

Paleontological Research ◽

10.2517/2020pr003 ◽

2021 ◽

Vol 25 (2) ◽

Author(s):

Satoshi Kodama ◽

Hideko Takayanagi ◽

Kosuke Yoshii ◽

Thuy Thi Nhu Ha ◽

Ryuji Asami ◽

...

Keyword(s):

Oxygen Isotope ◽

Ryukyu Islands ◽

Carbon And Oxygen Isotope ◽

The Ryukyu Islands ◽

Tridacna Squamosa

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A taxonomic review of the genus Physopelta (Hemiptera: Heteroptera: Largidae) from Japan, Korea, and Taiwan, with a new record of Ph. parviceps from China

Zootaxa ◽

10.11646/zootaxa.4951.3.3 ◽

2021 ◽

Vol 4951 (3) ◽

pp. 461-491

Author(s):

JUN SOUMA ◽

TADASHI ISHIKAWA

Keyword(s):

New Species ◽

New Record ◽

Guangdong Province ◽

Zhejiang Province ◽

Ryukyu Islands ◽

Taxonomic Review ◽

The Ryukyu Islands ◽

Two New Species ◽

Central Taiwan ◽

First Time

In this paper, we revised the physopeltine genus Physopelta Amyot & Serville, 1843 (Hemiptera: Heteroptera: Largidae) from Japan, Korea, and Taiwan. Five species were recognized and diagnosed, including two new species, Ph. (Neophysopelta) lutaspidata sp. nov. from northern and central Taiwan and Ph. (N.) fusciscutellata sp. nov. from the Ryukyu Islands, Japan and Taiwan, and three known species, Ph. (N.) gutta gutta (Burmeister, 1834), Ph. (N.) parviceps Blöte, 1931, and Ph. (N.) quadriguttata Bergroth, 1894. Physopelta (Neophysopelta) fusciscutellata sp. nov., was previously regarded as either of the two species, Ph. (N.) cincticollis Stål, 1863 and Ph. (N.) parviceps, for populations from Taiwan. Previous records of Ph. (N.) cincticollis from Japan proper and Korea, and Ph. (N.) slanbuschii (Fabricius, 1787) from the Ryukyu Islands were considered as misidentifications of Ph. parviceps. A key to facilitate the identification of the five species known in Japan, Korea, and Taiwan is provided. Additionally, Ph. (N.) parviceps is recorded from China (Guangdong Province and Zhejiang Province) for the first time.

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Long-chain n-3 polyunsaturated fatty acids contained in liver and muscle tissues of Okinawan long-spine porcupinefish (Diodon holocanthus Linnaeus 1758)

Nutrition & Food Science ◽

10.1108/nfs-03-2021-0089 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Yutaka Tashiro

Keyword(s):

Fatty Acids ◽

Fatty Acid ◽

Polyunsaturated Fatty Acids ◽

Ryukyu Islands ◽

Okinawa Island ◽

Content Type ◽

Muscle Tissues ◽

The Ryukyu Islands ◽

Total Fatty Acids ◽

Long Chain

Purpose This study aimed to analyze the lipid content and fatty acid composition in the liver and muscle of a porcupinefish species inhabiting waters around the Ryukyu Islands to investigate their potential as a source of long-chain n-3 polyunsaturated fatty acids (LC-PUFAs). Design/methodology/approach Porcupinefish were collected along the Okinawa Island coast. The composition of fatty acids and cholesterol in both liver and muscle were analyzed using a gas chromatograph mass spectrometer. Findings The liver of Okinawan long-spine porcupinefish was rich in lipids whose content correlated to the proportion of liver/body weight. Fatty acid compositions in their liver and muscles were similar to each other. LC-PUFAs occupied 44% of total fatty acids, with docosahexaenoic acid (DHA) being the dominant (42%), whereas eicosapentaenoic acid occupied 2.4%. The liver contained 1,690 mg of cholesterol and 14.8 g of DHA per 100 g, whose proportion decreased in summer compared to other seasons (p = 0.036). Originality/value The liver of Okinawan long-spine porcupinefish, which has not yet been commercially used although its non-toxicity is claimed, can be an excellent source of LC-PUFAs, especially DHA, accentuating its potential in food supplements’ production.

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