Introduction of Asian strains and low genetic variation in farmed seaweeds: indications for new management practices
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- 作者：Christina Halling (1)
Sofia A. Wikstr?m (1) (2)
Gustaf Lilliesk?ld-Sj?? (1)
Erik M?rk (1)
Elisabeth Lunds?r (3)
Giuseppe C. Zuccarello (4) - 关键词：Eucheuma ; Genetic variation ; Haplotypes ; Introduced species ; Kappaphycus ; Seaweed farming ; WIO region
- 刊名：Journal of Applied Phycology
- 出版年：2013
- 出版时间：February 2013
- 年：2013
- 卷：25
- 期：1
- 页码：89-95
- 全文大小：296KB
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Sofia A. Wikstr?m (1) (2)
Gustaf Lilliesk?ld-Sj?? (1)
Erik M?rk (1)
Elisabeth Lunds?r (3)
Giuseppe C. Zuccarello (4)
1. Department of Systems Ecology, Stockholm University, 106 91, Stockholm, Sweden
2. AquaBiota Water Research, L?jtnantsgatan 25, 115 50, Stockholm, Sweden
3. Norconsult AS, Postboks 110, 1391, Horten, Norway
4. School of Biological Sciences, Victoria University of Wellington, P.O. Box 600, Wellington, 6001, New Zealand
文摘
Seaweed farming has a crucial role in the development of future sustainable mariculture. In the same time, spreading of introduced species or genotypes from farms may threaten local ecosystems. We analyzed a molecular marker (mitochondrial cox2-3 spacers) from cultivated and wild specimen of the widely farmed seaweeds Eucheuma and Kappaphycus, collected in Zanzibar on the African east coast where commercial farming was introduced in 1989. Genotypes of presumed Asian origin were found growing on coral reefs and drifting in seagrass meadows, indicating that genotypes introduced for farming have established successfully in the wild in Zanzibar. Only a very low number of genotypes, all of Asian origin, were found in the farms. This indicates a low accessible gene pool, which can limit the capacity for adaptation to changed conditions and disease resistance in the farming system. African genotypes were found in a few sites, showing the potential for future farming of native strains. The ecological effects of the Asian genotypes introduced to coral reefs should also be further investigated in order to evaluate the risk connected with further introductions of new foreign strains.