Characteristics of Submarine Topography off Northern Taiwan

Song, Gwo-Shyh; Chang, Yet-Chung; Ma, Chung-Ping

doi:10.3319/tao.1997.8.4.461(o)

Cited by 10 publications

(24 citation statements)

References 11 publications

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“…According to statolith δ 18 O values, most probably the individuals of the spring and summer groups hatched near the coasts of northeastern Taiwan, with an occurrence probability of 1; these findings support empirical evidence that the waters near the coast of northeastern Taiwan are one of main spawning grounds for S. lessoniana (Chen et al, 2015;Ching et al, 2017). The dominant topography in northern Taiwan is that of an eroded coastline with complicated topographical features and structures (Song et al, 1997), forming macroalgae-rich and coral-rich environments for spawning. In addition, the quantity of nutrients supplied by the year-round upwelling of the Kuroshio Current off northeastern Taiwan supports high primary production and sustains sequential consumers in the waters (Liu et al, 1992;Chen, 1997;Gong et al, 2003).…”

Section: Prediction Of Ontogenetic Movement and Geographical Distribusupporting

confidence: 76%

Seasonal Movement Patterns of the Bigfin Reef Squid Sepioteuthis lessoniana Predicted Using Statolith δ18O Values

et al. 2020

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Sepioteuthis lessoniana is a widely distributed neritic squid in the Indo-Pacific Ocean. It is an important species in fisheries, but species management is difficult because of inadequate information regarding its life history. The daily growth and δ 18 O values from the core to the edge of statoliths of S. lessoniana collected in northern Taiwan were analyzed to predict the experienced temperature history along with ontogenetic stages. The probability of occurrence in a given area at each life stage in three seasonal groups was determined using salinity values, deduced and measured temperatures, and the known ecology of S. lessoniana. The results showed that ontogenetic variation in the statolith δ 18 O values in S. lessoniana reflected the seasonal temperature fluctuation observed in Taiwanese waters, which indicated the reliability of the prediction method. Complex and diverse distribution and movement patterns were observed in the three seasonal groups. The results also indicated the importance of the waters near the coast of northeastern Taiwan as a spawning ground. Based on a model prediction, the distribution of S. lessoniana is likely associated with water temperature and current. A potential migration route from the Penghu Islands to northeastern Taiwan suggests a high level of population connectivity in S. lessoniana in Taiwan. This study provides information on the spatial and vertical distribution of S. lessoniana at various ontogenetic stages, which is essential for resource management and conservation of this commercial species.

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Section: Prediction Of Ontogenetic Movement and Geographical Distribusupporting

confidence: 76%

Seasonal Movement Patterns of the Bigfin Reef Squid Sepioteuthis lessoniana Predicted Using Statolith δ18O Values

et al. 2020

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“…Off east and south Taiwan, the sea floor shows steep slopes cut by gullies and canyons, alternating linear ridges and troughs and deep oceanic basins. Distribution and characteristics of submarine physiographic features in the region of Taiwan are mainly controlled by tectonics and sedimentation (Bowin et al 1978;Chen et al 1988;Chen 1989;Chen et al 1992;Hsu, et al 1996;Hsu et al 1998;Huang et al 1992;Huang and Yin 1990;Liu et al 1998a;Song, et al 1997;Yu 1997;Yu and Chiao 1994;Yu and Chou 2001a;Yu and Song 1993;Yu and Song 2000a;Yu and Song 2000b). Among previous studies, articles by Liu et al (1998a) and Yu and Song (2000a) are the most comprehensive, considering the submarine physiographic features around Taiwan as a whole as the results of tectonic interactions between the Eurasian and the Philippine sea plates and related sedimentation.…”

Section: Ho-shing Yumentioning

confidence: 97%

Geological Characteristics and Distribution of Submarine Physiographic Features in the Taiwan Region

2003

Marine Georesources & Geotechnology

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“…It is a gradual slope connecting a narrow sub sided terrace under an inner slope (the northern border of the Mien-hua Drainage Basin; Fig. 5;and Song et al, 1997). The Chilung Shelf is a subsided part of the continental shelf of the East China Sea (Song et al, 1997), bordered by the Chilung Valley and the Mien-hua Canyon and its western tributary.…”

Section: Canyons and Morphological Units On The Continental Shelf/slopementioning

confidence: 99%

“…5;and Song et al, 1997). The Chilung Shelf is a subsided part of the continental shelf of the East China Sea (Song et al, 1997), bordered by the Chilung Valley and the Mien-hua Canyon and its western tributary. It is lower than the rest of the continental shelf of East China Sea and generally tilts to the southeast (Fig.…”

Section: Canyons and Morphological Units On The Continental Shelf/slopementioning

confidence: 99%

“…5). Seismic reflection profiles show that there are normal faults cutting through the top sedimentary layers of this part of the subsided continental shelf (e.g., Teng, 1998;Song et al, 1997). The Chilung Slope is the part of the continental slope between the Mien-hua Canyon and the Ilan plain in northeastern Taiwan, and borders the Chilung Shelf on its southeast side.…”

Section: Canyons and Morphological Units On The Continental Shelf/slopementioning

confidence: 99%

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Westward Extension of the Okinawa Trough at its Western End in the Northern Taiwan Area: Bathymetric and Seismological Evidence

Wang¹,

Yang²,

Chou³

et al. 2000

Terr. Atmos. Ocean. Sci.

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In this paper, we used detailed bathymetry, earthquake distribution and focal mechanisms to study the phenomenon of active westward exten sion of the Okinawa trough in the northern Taiwan area. We found a dis tinguishable subsiding and collapsing area on the continental shelf edge and the continental slope on the northern side of the Okinawa trough. This area extends westwards to at least 121.5°E and includes several morpho logical units related to the existence and formation of three major canyons. The canyons and the morphological units are still evolving through the sedi ment transport and through the subsidence and collapse of material due to the formation of the Okinawa trough. According to the degree of develop ment, we found that these morphological units have developed from the east to the west. There are two parallel E-W trending central graben at the westernmost part of the Okinawa trough, with each corresponding to a narrow shallow seismic belt. The widths of the central graben are 10-15 km. There is geophysical and geological evidence that the formation of these central graben has been extended westwards to the onland area of Taiwan. Focal mechanisms of earthquakes and the topographic features show that the formation of the Okinawa trough is associated with the down-dip ex tensional stress along the subducting slab of the Philippine Sea plate, and most of northern Taiwan and all the northeastern offshore area of Taiwan are under tensional stress. New portions of the Okinawa trough have been forming across the whole width at its western end through subsidence in the continental shelf, the continental slope and the traditionally recognized area of the Okinawa trough in the northeastern Taiwan area, to make the Okinawa trough develop gradually and extend westwards.

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Characteristics of Submarine Topography off Northern Taiwan

Cited by 10 publications

References 11 publications

Seasonal Movement Patterns of the Bigfin Reef Squid Sepioteuthis lessoniana Predicted Using Statolith δ18O Values

Seasonal Movement Patterns of the Bigfin Reef Squid Sepioteuthis lessoniana Predicted Using Statolith δ18O Values

Geological Characteristics and Distribution of Submarine Physiographic Features in the Taiwan Region

Westward Extension of the Okinawa Trough at its Western End in the Northern Taiwan Area: Bathymetric and Seismological Evidence

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