Novos registros e ampliação de limites meridionais de distribuição de poríferos (Porifera, Demospongiae) no Atlântico sudoeste

Lerner, Cléa; Mothes, Beatriz; Carraro, João Luís

doi:10.1590/s0101-81752005000300012

Cited by 10 publications

(5 citation statements)

References 11 publications

(6 reference statements)

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“…The knowledge of the benthic invertebrate fauna in Brazil remains weak and the nu mber o f recorded species is much lower than the world records, reflecting insufficient studies [3]. Studies on the biodiversity of sessile benthic invertebrates in Santa Catarina reports 32 species of Porifera [6][7][8][9][10][11][12][13][14][15][16], 14 Anthoathecata and Leptothecata hydrozoans [17][18][19], four octocorals [20,21], 34 ascidians [22]. In addition, 14 scleract inians anthozoans recorded at the outer continental shelf [23,24].…”

Section: Introductionmentioning

confidence: 99%

Biodiversity of Sessile Fauna on Rocky Shores of Coastal Islands in Santa Catarina, Southern Brazil

Bouzon¹,

Brandini²,

Rocha³

2012

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The epilithic sessile fauna of coastal islands off Santa Catarina, southern Brazil, was analyzed along two 30 m long sublitoral transects. A total o f 111 taxa were identified of wh ich 55 are new records fo r the South Atlantic epilithic assemblages. Exotic sponges, bryozoans and ascidians (Paraleucilla magna, Sch izoporella errata, Bugula dentata, Styela plicata respectively) were found at Marine Protected Areas. This paper gives further knowledge on the marine sessile fauna of the coastal islands of southern Brazil for environ mental monitoring programs. A more co mplete list of epilithic species will certainly provide a baseline to detect future environmental changes and local anthropogenic impacts on the biodiversity of southern Brazilian ecosystems.

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Section: Introductionmentioning

confidence: 99%

Biodiversity of Sessile Fauna on Rocky Shores of Coastal Islands in Santa Catarina, Southern Brazil

Bouzon¹,

Brandini²,

Rocha³

2012

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“…The genus is represented by thirteen species occurring in the Caribbean Sea (e.g. van Soest, 1984, 1990; Zea, 1987), south-western Atlantic (Lerner et al , 2005; Muricy & Hajdu, 2006; Muricy et al , 2008), eastern Atlantic, western Indian Ocean, Indo-Pacific region, Western Australia (van Soest, 1990, 2002) and in the deep North Pacific (Lehnert et al , 2006; van Soest et al , 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Monanchora arbuscula was up to now the only species in the genus recognized in the entire Western Atlantic region (van Soest, 1990, 2002) with a distribution stretching from the Gulf of Florida to Santa Catarina State, Southern Brazil (Lerner et al , 2005; Muricy et al , 2008). This is one of the most variable demosponges in regard to its morphology, with a complete spicular complement composed of two categories of subtylostyles, tridentate anchorate isochelae, sigmoid microscleres and acanthomicrorhabds (van Soest, 2002).…”

Section: Introductionmentioning

confidence: 99%

Monanchora brasiliensis sp. nov. (Poecilosclerida: Demospongiae), new crambeid from the Brazilian coast, south-western Atlantic, with monodentate anchorate chelae

et al. 2012

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A new Brazilian endemic Monanchora is described, M. brasiliensis sp. nov. It is clearly distinct from any other species in the genus by the monodentate shape of its anchorate isochelae, and its smooth, centrotylote and strongyloid microrhabds. Monodentate anchorate isochelae are relatively common, normally abundant, and represent the main diagnostic character for recognizing the new species, but microrhabds are usually rare and may be even absent. Monanchora brasiliensis sp. nov. can be further differentiated from other Atlantic species of the genus in eventually showing tetralobate branches and a skeleton formed by well-defined honey-coloured spongin fibres. The affinities of the new species with other crambeids and the nature of anchorate isochelae, microrhabds as well as the megascleres in defining Monanchora are discussed. An amended diagnosis for the genus is proposed.

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“…The genus Hymeniacidon is widely distributed in the world. In Brazil it is restricted of the Southern and Southeast (LERNER et al, 2005;HAJDU, 2006). They are frequently distributed in intertidal zone, including areas with chronic pollution, such as Guanabara Bay (Rio de Janeiro State), where Hymeniacidon heliophila (PARKER, 1910) is abundant (BREVES-RAMOS et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Chemical defense of Hymeniacidon heliophila (Porifera: halichondrida) against tropical predators

et al. 2010

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Various benthic organisms have chemical defenses which reduce their predators' consumption. Although their efficiency may be noticed in many organisms, many of their effects are not well- known yet. Multiple ecological roles of secondary metabolites are shown in some sponges, which may represent an adaptative advantage considering the high amount of energy used to produce these chemical compounds. The goal of this work was to investigate the defensive property of the extracts from the sponge Hymeniacidon heliophila against the tropical predators: hermit crabs (Calcinus tibicens), sea urchins (Lytechinus variegatus) and generalist fishes. Extracts obtained with n-hexane, ethyl acetate and acetone/methanol were used in assays and all of them were effective in reducing the consumption by C. tibicens; n-hexane extract reduced the consumption by L. variegatus; and medium polarity extracts reduced fish consumption. Either the variation in action or the multiple ecological roles of the extracts indicates that different types of compounds can be associated to the defensive system produced by H. heliophila.
Diversos organismos bênticos possuem defesas químicas que ajudam a diminuir a predação. Embora sua eficácia seja comprovada, muitos de seus efeitos são ainda desconhecidos. Múltiplas funções dos metabolitos secundários foram evidenciadas em algumas esponjas e isso pode representar uma vantagem adaptativa, considerando o alto valor energético gasto pelas espécies para produzí-los. O objetivo desse trabalho foi investigar as propriedades defensivas de extratos da esponja Hymeniacidon heliophila contra predadores tropicais: paguros (Calcinus tibicens), ouriços-do-mar (Lytechinus variegatus) e peixes generalistas. Extratos em n-hexano, acetato de etila e acetona/metanol foram usados nos ensaios e todos foram eficientes na redução do consumo por C. tibicen; extratos em n-hexano reduziram o consumo por L. variegatus; e extratos de média polaridade reduziram o consumo por peixes. A variação na ação ou as funções ecológicas múltiplas dos extratos indicam que diferentes tipos de substâncias podem ser associadas ao sistema defensivo produzido por Hymeniacidon heliophila

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Novos registros e ampliação de limites meridionais de distribuição de poríferos (Porifera, Demospongiae) no Atlântico sudoeste

Cited by 10 publications

References 11 publications

Biodiversity of Sessile Fauna on Rocky Shores of Coastal Islands in Santa Catarina, Southern Brazil

Biodiversity of Sessile Fauna on Rocky Shores of Coastal Islands in Santa Catarina, Southern Brazil

Monanchora brasiliensis sp. nov. (Poecilosclerida: Demospongiae), new crambeid from the Brazilian coast, south-western Atlantic, with monodentate anchorate chelae

Chemical defense of Hymeniacidon heliophila (Porifera: halichondrida) against tropical predators

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