Induction of Attachment of the Mussel Perna perna by Natural Products from the Brown Seaweed Stypopodium zonale |
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Authors: | Angélica R Soares Bernardo A P da Gama Andrea P da Cunha Valéria L Teixeira Renato C Pereira |
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Institution: | (1) Departamento de Química Organica, Instituto de Química, Universidade Federal do Rio de Janeiro (UFRJ)—Núcleo em Ecologia e Desenvolvimento Sócio-ambiental de Macaé, Universidade Federal do Rio de Janeiro (NUPEM-UFRJ), CEP 27901-000 Macaé, RJ, Brazil;(2) Departamento de Biologia Marinha, Universidade Federal Fluminense (UFF), PO Box 100644 Niterói, RJ, CEP 24001-970, Brazil |
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Abstract: | Marine invertebrates settle, attach, and/or metamorphose in response to signals from several sources, including seaweeds.
In response to the aquaculture challenge of producing constant numbers of juveniles from cultured species, natural inducers
have been screened for their ability to improve those processes. However, few chemical inducers of attachment of invertebrates
have been identified, and even less of these were secondary metabolites. The goal of this work was to isolate the natural
products responsible for induction activity using bioassay-guided fractionation of the organic extract of the brown seaweed
Stypopodium zonale and the attachment of juveniles of the common brown mussel, Perna perna, as a model. The meroditerpene epitaondiol, identified by comparison of spectral data with the literature, promoted as much
as 4.7 times more mussel attachment compared to controls at the natural concentration found in this alga (0.041% of the crude
extract or 0.012% of algal dry weight). This is the first report showing that a seaweed produces terpenoid compounds as cues
for invertebrate attachment, and future studies evaluating this action on settlement of mussels in the field are expected
to improve aquaculture technology by increasing mussel spat production. |
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Keywords: | attachment brown mussels chemical signals induction Perna perna Stypopodium zonale |
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