Cultivation of the brown alga Hizikia fusiformis (Harvey) Okamura: controlled fertilization and early development of seedlings in raceway tanks in ambient light and temperature

doi:10.1007/s10811-006-9078-y

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	Cultivation of the brown alga Hizikia fusiformis (Harvey) Okamura: controlled fertilization and early development of seedlings in raceway tanks in ambient light and temperature
	Pang, ShaoJun ; Gao, Suqin ; Sun, JianZhang
	2006-12-01
发表期刊	JOURNAL OF APPLIED PHYCOLOGY
ISSN	0921-8971
卷号	18 期号:6 页码:723-731
文章类型	Article
摘要	Commercial cultivation of the dioecious brown macroalga Hizikia fusiformis (Harvey) Okamura in East Asia depends on the supply of young seedlings from regenerated holdfasts or from wild population. Recent development of synchronized release of male and female gametes in tumble culture provides a possibility of mass production of young seedlings via sexual reproduction. In this paper, we demonstrate that controlled fertilization can be efficiently realized in ambient light and temperature in a specially designed raceway tank in which the sperm-containing water has been recirculated. The effective fertilization time of eggs by sperm was found to be within six hours. Fast growth and development of the young seedlings relied on the presence of water currents. Velocity tests demonstrated that young seedlings of 2-3 mm in length could withstand a water current of 190 cm s(-1) stop without detachment. Culture experiments at 24 h postfertilization showed that elongation of both the seedlings and their rhizoids were not hampered by high irradiance up to 600 mu mol photons m(-2) stop s(-1) stop. However, growth was slightly retarded if cultured at a temperature of 16 degrees C compared to other culture temperatures of 22, 25 and 29 degrees C. No seedling detachment was observed after transfer of the young seedlings to raft cultivation in the sea after one and 1.5 months post-fertilization, indicating the feasibility of obtaining large quantity of seedlings in such a system.; Commercial cultivation of the dioecious brown macroalga Hizikia fusiformis (Harvey) Okamura in East Asia depends on the supply of young seedlings from regenerated holdfasts or from wild population. Recent development of synchronized release of male and female gametes in tumble culture provides a possibility of mass production of young seedlings via sexual reproduction. In this paper, we demonstrate that controlled fertilization can be efficiently realized in ambient light and temperature in a specially designed raceway tank in which the sperm-containing water has been recirculated. The effective fertilization time of eggs by sperm was found to be within six hours. Fast growth and development of the young seedlings relied on the presence of water currents. Velocity tests demonstrated that young seedlings of 2-3 mm in length could withstand a water current of 190 cm s(-1) stop without detachment. Culture experiments at 24 h postfertilization showed that elongation of both the seedlings and their rhizoids were not hampered by high irradiance up to 600 mu mol photons m(-2) stop s(-1) stop. However, growth was slightly retarded if cultured at a temperature of 16 degrees C compared to other culture temperatures of 22, 25 and 29 degrees C. No seedling detachment was observed after transfer of the young seedlings to raft cultivation in the sea after one and 1.5 months post-fertilization, indicating the feasibility of obtaining large quantity of seedlings in such a system.
关键词	Hizikia Fusiformis Seaweed Cultivation Fertilization Egg Release
学科领域	Biotechnology & Applied Microbiology ; Marine & Freshwater Biology
DOI	10.1007/s10811-006-9078-y
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000242285100004
引用统计	被引频次：25[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/5884
专题	实验海洋生物学重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Seaweed Stock Culture Ctr, Qingdao 266071, Peoples R China 2.PingYang Nanji Isl Dev Co Ltd, Marine Aquaculture Res Stn, Zhejiang 325401, Peoples R China
推荐引用方式 GB/T 7714	Pang, ShaoJun,Gao, Suqin,Sun, JianZhang. Cultivation of the brown alga Hizikia fusiformis (Harvey) Okamura: controlled fertilization and early development of seedlings in raceway tanks in ambient light and temperature[J]. JOURNAL OF APPLIED PHYCOLOGY,2006,18(6):723-731.
APA	Pang, ShaoJun,Gao, Suqin,&Sun, JianZhang.(2006).Cultivation of the brown alga Hizikia fusiformis (Harvey) Okamura: controlled fertilization and early development of seedlings in raceway tanks in ambient light and temperature.JOURNAL OF APPLIED PHYCOLOGY,18(6),723-731.
MLA	Pang, ShaoJun,et al."Cultivation of the brown alga Hizikia fusiformis (Harvey) Okamura: controlled fertilization and early development of seedlings in raceway tanks in ambient light and temperature".JOURNAL OF APPLIED PHYCOLOGY 18.6(2006):723-731.

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