Abstract
The density (fresh weight/volume) of the detached thalli of four sargassacean species (Myagropsis myagroides, Sargassum horneri, S. patens, S. siliquastrum) was measured weekly to determine their floating period. Thalli of the four species were collected with respect to the difference in their reproductive stage, and their floating abilities at different stages were determined. Floating thallus was ballasted with pre-weighed leads until the final addition of a weight caused sinking. The density and floating period of sargassacean thalli were dependent on the species and the specimens’ reproductive stage. The floating period of thalli detached before maturation was estimated to be between 4 and 14 weeks. However, thalli detached during maturation had a floating period of between 1 and 8 weeks, and those detached after maturation sank within 2 weeks. Sargassum horneri had the lowest density and the longest floating period among the four species investigated and this may explain the high abundance of S. horneri in floating seaweeds observed in the Sea of Japan.
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References
Ikehara K, Sano O (1986) Distribution and species composition of floating seaweeds collected in the Sado Straits of the Japan Sea. Bull Jap Sea Reg Fish Res Lab 36:59–75
Kingsford MJ (1995) Drift algae: a contribution to near-shore habitat complexity in the pelagic environment and an attractant for fish. Mar Ecol Prog Ser 116:297–301
Mann KH (2000) Ecology of coastal waters, 2nd edn. Blackwell Science, Massachusetts
Murase N, Kito H, Mizukami Y, Maegawa M (2000) Productivity of a Sargassum macrocarpum (Fucales, Phaeophyta) population in Fukawa Bay, Sea of Japan. Fish Sci 66:270–277
Ohno M (1984) Algological observation on the floating seaweeds of offshore water of Shikoku Island in Japan. Bull Jap Soc Sci Fish 50:1653–1656
Parr AE (1939) Quantitative observations on the pelagic Sargassum vegetation of the western north Atlantic. Bull Bingham Oceanogr Coll 6(7):1–90
Paula EJ, Eston VR (1987) Are there other Sargassum species potentially as invasive as S. muticum? Bot Mar 30:405–410
Senta T (1965) Importance of drifting seaweeds in the ecology of fishes. Japan Fisheries Resource Conservation Association, Tokyo
Taniguchi K, Yamada Y (1978) Ecological study on Sargassum patens C. Agardh, and S. serratifolium C. Agardh in the sublittoral zone at Iida Bay of Noto Peninsula in the Japan Sea. Bull Jap Sea Reg Fish Res Lab 29:239–253
Woodcock AH (1950) Subsurface pelagic Sargassum. J Mar Res 9(2):77–92
Yatsuya K (2005) Studies on production and outflow process of Sargassum forest. Spec Rep Kyoto Inst Ocean Fish Sci 7:1–41
Yatsuya K, Nishigaki T, Douke A, Wada Y (2005a) Annual net production of the five Sargassaceae species in Yoro, western Wakasa Bay, Sea of Japan. Fish Sci 71:1098–1106
Yatsuya K, Nishigaki T, Douke A, Wada Y (2005b) Species composition of the drifting seaweed at the western part of Wakasa Bay. Bull Kyoto Inst Ocean Fish Sci 27:13–18
Yoshida T (1963) Studies on the distribution and drift of the floating seaweeds. Bull Jap Sea Reg Fish Res Lab 23:141–186
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Yatsuya, K. (2007). Floating period of Sargassacean thalli estimated by the change in density. In: Borowitzka, M.A., Critchley, A.T., Kraan, S., Peters, A., Sjøtun, K., Notoya, M. (eds) Nineteenth International Seaweed Symposium. Developments in Applied Phycology, vol 2. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-9619-8_43
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DOI: https://doi.org/10.1007/978-1-4020-9619-8_43
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