Experimental analysis of recruitment in a scleractinian coral at high latitude
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Published source details
Tioho H., Tokeshi M. & Nojima S. (2001) Experimental analysis of recruitment in a scleractinian coral at high latitude. Marine Ecology Progress Series, 213, 79-86.
Published source details Tioho H., Tokeshi M. & Nojima S. (2001) Experimental analysis of recruitment in a scleractinian coral at high latitude. Marine Ecology Progress Series, 213, 79-86.
Actions
This study is summarised as evidence for the following.
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Use settlement tiles made from unnatural materials to encourage natural coral settlement Action Link |
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Transplant wild grown coral onto natural substrate Action Link |
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Use settlement tiles made from unnatural materials to encourage natural coral settlement
A replicated, site comparison study in 1997–1999 at two coral reef sites in Amakusa, Japan (Tioho et al. 2001) found that placing artificial settlement tiles adjacent to adult stony coral Pocillopra damicornis colonies led to higher recruitment than tiles placed 8–10 m away. Three months after larvae were released by the adult colonies, 70 recruits had settled on tiles in July–October 1997 and 65 in July–October 1998 but no recruits settled NovemberJune in 1998 or 1999. The study reports that there were significantly more recruits on tiles placed adjacent to adult P. damicornis colonies than on tiles placed 8–10 m away but numbers are not reported. In July 1997, fifteen concrete blocks (40 × 20 × 10 cm) were placed on the substrate, adjacent (5–10 cm) to existing Pocillopora damicornis colonies, and a further 15 blocks were placed 810 m away from the nearest colony. Six ceramic settlement tiles (10 × 10 × 2 cm) were bolted to each concrete block. Tiles were retrieved after three months and new plates were attached and retrieved in June 1998. The process was repeated from July 1998–June 1999. P. damicornis recruits were identified and counted under a microscope.
(Summarised by: Ann Thornton)
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Transplant wild grown coral onto natural substrate
A study in 19971998 at two coral reef sites in Amakusa, Japan (Tioho et al. 2001) reported that transplanted stony coral Pocillopora damicornis fragments released larvae. Two weeks after larvae were released, average numbers of recruits ranged from 0.3–4.8/625 cm2 in 1997 and 0.1–5.6/625 cm2 in 1998. In February 1997, fifty Pocillopora damicornis colonies were collected from Ōshima Island and transplanted to an area of Satsuki where they had not previously been recorded. Colonies were attached to the rocky substrate using epoxy over a 10 m diameter area. Coral recruits were measured using quadrats two weeks after larval release in 1997 and new recruits (i.e. <2 cm) were recorded two weeks after larval release in 1998.
(Summarised by: Ann Thornton)
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