Identification of Bacteria from Substrata as Metamorphosis Inhibitors for the Coral Acropora

Ayaka Horikoshi, Chie Sasaki and Masayuki Hatta
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Masayuki Hatta: Department of Biology, Ochanomizu University, Japan

Oceanography & Fisheries Open Access Journal, 2017, vol. 4, issue 2, 66-69

Abstract: Bacteria on substrata certainly influence metamorphosis and settlement of coral larvae. We isolated bacteria from substrata and screened them for the capability of inducing or inhibiting metamorphosis of Acropora. Out of 468 isolates, only eight isolates revealed metamorphosis-inducing activities, which were weak or non-reproducible. Three of those isolates were identified as Alteromonas spp. Based on by 16SrDNA. On the other hand, metamorphosis-inhibiting bacteria were obtained efficiently, two out of 20 isolates, indicating a majority in bacterial communities on substrata. One revealed quick but temporal inhibition and the other revealed slow but persistent inhibition onto the metamorphosis induction by a peptide hormone. Thus, at least two inhibition pathways are suggested. Both of the two strains turned out to belong to the genus Pseudoalteromonas. Responses of coral larvae to mixtures of exclusive cues on the substratum, inducers and inhibitors, seem important in the ecological strategy to select their destiny in natural situations.

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Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:adp:jofoaj:v:4:y:2017:i:2:p:66-69

DOI: 10.19080/OFOAJ.2017.04.555635

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