Effects of secondary metabolites from the tropical Brazilian brown alga Dictyota menstrualis on the amphipod Parhyale hawaiensis

Pereira, Renato Crespo; Cavalcanti, Diana Negrão; Teixeira, Valéria Laneuville

doi:10.3354/meps205095

Cited by 49 publications

(46 citation statements)

References 22 publications

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“…Usually, they are difficult to distinguish, and we were unable to identify the species used here, but it probably does not produce defensive chemicals, since it was used in previous studies as the major component of artificial foods (PEREIRA et al, 2000), or was preferentially consumed in feeding preference assays (PEREIRA et al, 2002).…”

Section: Discussionmentioning

confidence: 96%

Feeding preference of the sea urchin Lytechinus variegatus (Lamarck, 1816) on seaweeds

2008

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A B S T R A C TSeaweeds exhibit different strategies to minimize the damage caused by herbivores and also to influence the feeding preference of these consumers. This study evaluated the feeding preference of the sea urchin Lytechinus variegatus through multiple-choice experiments using the seaweeds Caulerpa racemosa, Dictyota menstrualis, Osmundaria obtusiloba, Plocamium brasiliense, Sargassum sp., and Ulva sp. In order to verify the importance of morphological and chemical aspects on this feeding preference, two assay-types were carried out using live and powdered macroalgae, respectively. Two different methods were employed to analyze the results obtained: comparison between biomass losses versus autogenic changes, and inclusion of autogenic values in biomass loss through herbivory. In both experiments a clear differential consumption of certain species of seaweeds by L. variegatus was observed, in the following decreasing order of preference: R E S U M OAs macroalgas apresentam diversos tipos de estratégias para minimizar os danos gerados por herbívoros que influenciam a preferência alimentar dos consumidores. Este estudo avaliou a preferência alimentar do ouriço-do-mar Lytechinus variegatus em experimentos de múltipla escolha utilizando as macroalgas bentônicas Caulerpa racemosa, Dictyota menstrualis, Osmundaria obtusiloba, Plocamium brasiliense, Sargassum sp., e Ulva sp. Para verificar a importância dos aspectos morfológicos e químicos na preferência, os ensaios foram realizados com algas vivas e em pó, respectivamente. Foram utilizados dois métodos distintos de análise de dados: comparação entre a perda de biomassa e as mudanças por autogenia, e a incorporação dos valores de autogenia à perda de biomassa por herbivoria. Em ambos os experimentos observou-se uma clara preferência de L. variegatus por certas espécies de macroalgas em relação a outras, em ordem decrescente de preferência: C. racemosa ≈ Ulva sp. > O. obtusiloba ≈ Sargassum sp. > P. brasiliense > D. menstrualis. Além disso, constatou-se que os dois métodos de análise produziram resultados muito similares. De acordo com os resultados, a preferência alimentar de L. variegatus é provavelmente condicionada pela química defensiva produzida por P. brasiliense e D. menstrualis e aspectos morfológicos presentes em C. racemosa, Ulva sp., O. obtusiloba e Sargassum sp.

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Section: Discussionmentioning

confidence: 96%

Feeding preference of the sea urchin Lytechinus variegatus (Lamarck, 1816) on seaweeds

2008

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“…However, P. hawaiensis preferred Bryopsis, Padina, and Lyngbya in similar amounts and above other foods, whereas C. imbroglio did not show a statistical preference for any diet (although average consumption was higher on Bryopsis and Tolypothrix). Parhyale appears to have a broad distribution and diet, feeding on algae and detritus (Myers 1985;Poovachiranon et al 1986;Barnard and Karaman 1991;Serejo 1999;Pereira et al 2000). Interestingly, P. hawaiensis was never observed in any of the cyanobacterial collections, although it was found on macroalgae from Pago Bay.…”

Section: Discussionmentioning

confidence: 98%

Feeding by coral reef mesograzers: algae or cyanobacteria?

Cruz‐Rivera

Paul

2006

Coral Reefs

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Marine studies on herbivory have addressed the role of algae as food and shelter for small consumers, but the potential of benthic cyanobacteria to play similar roles is largely unknown. Here, feeding preferences were measured for eight invertebrate consumers from Guam, offered four common macroalgae and two cyanobacteria. The survivorship of another consumer raised on either macroalgae or cyanobacteria was also assessed. From the choices offered, the sacoglossans Elysia rufescens and E. ornata consumed the green macroalga Bryopsis pennata. The crab Menaethius monoceros preferred the red alga Acanthophora spicifera. The amphipods Parhyale hawaiensis and Cymadusa imbroglio consumed macroalgae and cyanobacteria in equivalent amounts, with C. imbroglio showing less selectivity among diets. In contrast to these patterns, in these assays the gastropods Stylocheilus striatus, Haminoea cymbalum, H. ovalis, and Haminoea sp. fed exclusively, or survived only, on cyanobacteria. Preferences for different cyanobacteria varied. Field surveys of cyanobacteria-associated species yielded 34 different invertebrate taxa and suggested different degrees of specificity in these associations. Tropical mesograzers exploit considerably different food resources, with some species adapted to consume cyanobacterial mats. Benthic cyanobacteria may play important roles as food and shelter for marine consumers and may indirectly influence local biodiversity through their associated fauna.

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“…Different secondary metabolites may also be found in the same species of seaweed growing in different habitats (Hay & Fenical, 1988;Pereira et al, 2000). For example, shallow and deep-water populations of the brown seaweed Stypopodium zonale (Lamouroux) Papenfuss produce different secondary metabolites (Gerwick et al, 1985), and the red alga Portieria hornemannii (Lyngbye) P. Silva varies in its composition of halogenated monoterpenes among different collection sites in the tropical Ocean (Gunatilaka et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Feeding-deterrent properties of diterpenes of Dictyota mertensii (Phaeophyceae, Dictyotales)

2007

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A B S T R A C TCrude extracts of the brown seaweed Dictyota mertensii (Martius) Kützing collected at two distant and different places on the Brazilian coast, Búzios (Rio de Janeiro) and Fernando de Noronha (PE), were evaluated for defensive chemistry against the crab Pachygrapsus transversus, and the sea urchin Lytechinus variegatus. The extract from Búzios specimens of D. mertensii significantly inhibited the consumption by both P. transversus and L. varigetaus. Fractionation of the extracts of specimens of D. mertensii from Búzios and F. de Noronha followed by complementary assays revealed one active fraction from each location, which contained distinct defensive secondary metabolites. In each active fractions prenylated guaiane diterpenes were the major compounds. Dictyol H and epoxypachydictyol A were the most abundant compounds in Búzios and F. de Noronha, respectively, followed by minor components. Our results show a differential production of secondary metabolites in the two distant and different populations of D. mertensii along the Brazilian coast. This suggests that defensive chemicals from this seaweed are not qualitatively absolute characteristics of the species, but may represent an ecological specialization to successfully prevent herbivory. R E S U M OOs espécimes da macroalga parda Dictyota mertensii coletados em dois diferentes locais no litoral brasileiro e distantes entre si, Búzios (Rio de Janeiro) e Fernando de Noronha (PE), foram avaliados quanto à atuação de seus extratos como defesa química contra o caranguejo Pachygrapsus transversus, e o ouriço do mar Lytechinus variegatus. O extrato dos espécimes de D. mertensii de Búzios inibiu o consumo por ambos P. transversus e L. variegatus. O fracionamento dos extratos dos espécimes de D. mertensii de Búzios e F. de Noronha avaliados em ensaios complementares revelaram uma fração ativa contendo distintos metabolitos secundários defensivos. Diterpenos do tipo guaiano prenilado foram as substâncias majoritárias em ambas as frações, mas dictyol H e epoxipachydictyol A foram os mais abundantes em Búzios e F. de Noronha, respectivamente, seguidos por componentes minoritários. Nossos resultados mostram uma produção diferencial de metabolitos secundários em duas populações distintas e distantes de D. mertensii no litoral brasileiro e sugerem que as defesas químicas desta macroalga marinha não são uma característica qualitativa absoluta desta espécie e pode representar uma especialização ecológica eficaz para prevenir a herbivoria.

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Effects of secondary metabolites from the tropical Brazilian brown alga Dictyota menstrualis on the amphipod Parhyale hawaiensis

Cited by 49 publications

References 22 publications

Feeding preference of the sea urchin Lytechinus variegatus (Lamarck, 1816) on seaweeds

Feeding preference of the sea urchin Lytechinus variegatus (Lamarck, 1816) on seaweeds

Feeding by coral reef mesograzers: algae or cyanobacteria?

Feeding-deterrent properties of diterpenes of Dictyota mertensii (Phaeophyceae, Dictyotales)

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