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Growth, artificial seedling raising and cultivation of Sargassum confusum (Fucales, Phaeophyceae) inhabiting the coast of Shandong Peninsula, China

  • Jinhua Pan
  • Zhuangzhi Zhang
  • Shenhui Yu
  • Houwei Han
  • Xin Jiang
  • Liming Jiang
  • Guangjin Liang
  • Juan Sun
  • Xiaojie LiEmail author
  • Guanpin Yang
Article

Abstract

The seasonal growth, seedling raising and artificial cultivation of Sargassum confusum were studied along the coast of Dong Chudao at the mouth of Sanggou Bay (37°02′12″N, 122°33′51″E). We also compared the growth of juveniles at different temperatures (15, 18, 21, and 24 °C) and irradiances (60, 95, and 130 μmol photons m−2 s−1) when seedlings were raised in a greenhouse. Sargassum confusum in Sanggou Bay began to develop receptacles in early April when the seawater temperature reached 10.8 °C. The receptacles matured in July and released the eggs when the seawater temperature reached 21 °C. The S. confusum thallus grew to maximum mean length (126.6 ± 19.8 cm) and reached the highest mean biomass yield (192.2 ± 40 g dwt thallus−1) in July and then rapidly decayed. Both temperature and irradiance significantly affected the growth of S. confusum seedlings (p < 0.05). The seedlings reached 1005 ± 47.6 μm at 21 °C and under 95 μmol photons m−2 s−1 in 2 weeks. The seedlings grew to approximately 0.5 cm in length in the seedling raising pools in approximately 5 weeks and reached 6 cm in the open sea nursery after an additional 4 months. The seedlings were then separated and inserted between the strands of vinylon ropes and cultivated in the open sea until early July when the seawater temperature reached approximately 21 °C and the maximum thalli length reached 116.4 cm on average. The dry weight of S. confusum harvested from a 4-m cultivation rope was 1.48 kg on average, and the dry weight yield was approximately 8.9 t ha−1.

Keywords

Seasonal growth Artificial seedling raising Cultivation Sargassum confusum Phaeophyta 

Notes

Acknowledgments

We wish to thank the two anonymous reviewers for their valuable comments on this manuscript. We also wish to show our appreciation to Z.M. Sun, from the Institute of Oceanology, Chinese Academy of Sciences, for his kind assistance in taking the photo of the entire S. confusum thalli.

Funding information

This work was supported by China Agriculture Research System (CARS-50), the National Technical Supporting Project Foundation (No.2012BAD55G01), and the Special Funds for Key Laboratories Construction of Shandong Province (No. SDKL2017009).

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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  • Jinhua Pan
    • 1
  • Zhuangzhi Zhang
    • 1
  • Shenhui Yu
    • 1
  • Houwei Han
    • 1
  • Xin Jiang
    • 1
  • Liming Jiang
    • 1
  • Guangjin Liang
    • 1
  • Juan Sun
    • 1
  • Xiaojie Li
    • 1
    Email author
  • Guanpin Yang
    • 2
  1. 1.Key Laboratory of Algae Genetic Breeding and Cultivation Techniques of Shandong Province, National Algae and Sea Cucumber Engineering and Technique Research CenterShandong Oriental Ocean Sci-Tech Co., Ltd.YantaiChina
  2. 2.College of Marine Life SciencesOcean University of ChinaQingdaoChina

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