• Title/Summary/Keyword: Song of Sea

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Characteristics of egg and larval distributions and catch changes of anchovy in relation to abnormally high sea temperature in the South Sea of Korea (이상 고수온에 따른 남해안 멸치 알과 자어 분포 및 어획량 변동 특성)

  • YOO, Joon-Taek;KIM, Yeong Hye;SONG, Se Hyun;LEE, Seung Hwan
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.54 no.3
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    • pp.262-270
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    • 2018
  • We examined the characteristics of egg and larval distributions and catch changes of anchovy in relation to abnormally high sea temperature in the South Sea of Korea in summer 2015 and 2016. The densities of anchovy eggs and larvae in the southern coastal region were lower in July-August 2016 than in July-August 2015. In particular, anchovy eggs and larvae (approximately 5 mm TL) were rarely observed in the coastal region in August 2016 due to the abnormally high SST (up to $28^{\circ}C$), which was above the optimum spawning temperature of anchovy. The catch of non-swimming stage (< 2 cm TL) larval anchovy was lower in July-August 2016 than in July-August 2015. The decreased catch of larval anchovy in July-August 2016 could be attributed to decreased spawning density in June-July 2016. In contrast, the catch of swimming stage (> 2 cm TL) anchovy was increased in July-August 2016. In the summer of 2016, prominent sea temperature near the southern coast of Korea and sea temperature higher than $30^{\circ}C$ in the offshore region of the South Sea of Korea could greatly enhance the retention of swimming anchovies in the coastal fishing grounds.

Growth and Maturation of Laminaria japonica Transplanted for Seaforest Construction on Barren Ground (갯녹음 해역에 해중림 조성을 한 다시마의 생장과 성숙)

  • Kim, Young-Dae;Hong, Jung-Pyo;Song, Hong-In;Jeon, Chang-Yeong;Kim, Su-Kyoung;Son, Yong-Soo;Han, Hyoung-Kyun;Kim, Dong-Sam;Kim, Jin-Hee;Kim, Myoung-Rae;Gong, Yong-Gun;Kim, Dae-Kweon
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.40 no.5
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    • pp.323-331
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    • 2007
  • Barren ground is an abnormal phenomenon in coastal ecosystems where seaweeds are destroyed and largely replaced by coralline algae containing calcium carbonate components. To restore the seaweed forest, we attempted reconstruction in an area of Samcheok, Korea, where barrenness is extensive. We developed two methods of seaforest construction underwater longline and seed transplantation for the brown seaweed Laminaria japonica, a fast-growing edible seaweed. The blade length of L. japonica attached to an underwater long line was $93.9{\pm}38.2cm$ and blade weight $7.6{\pm}2.1g$ in February 2004. Seaweed size declined after August 2004. A Similar pattern was observed using the transplantation method with maxima of $179.3{\pm}40.3cm\;and\;14.9{\pm}3.2g$ for blade length and weight, respectively in July 2004. The transplanted seaweeds matured in October as did a wild population. These results indicate that transplanted seaweed acclimate to new environments.