Desenvolvimento "in vitro" de larvas e juvenis de Emerita brasiliensis Schmitt (Crustacea, Decapoda, Hippidae) sob diferentes condições de temperatura, salinidade e regime alimentar

Otegui, Ana; Soares-Gomes, Abı́lio

doi:10.1590/s0101-81752007000200003

Cited by 5 publications

(4 citation statements)

References 15 publications

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“…Females incubate embryos underneath their abdomen for some weeks. Planktonic larvae are released in the intertidal zone and develop in nearshore areas for ~2 to 3 mo, passing through 5 to 8 zoeal stages (Otegui & Soares-Gomes 2007). Intermediate larval stages increase offshore distance, and approach the coast again during later planktonic stages (Veloso & Valentin 1993).…”

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Effects of morphodynamic and estuarine gradients on the demography and distribution of a sandy beach mole crab: implications for source–sink habitat dynamics

Celentano¹,

Gutiérrez²,

Defeo³

2010

Mar. Ecol. Prog. Ser.

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Several conceptual models relating biological and morphodynamic variables have been developed in sandy beach ecology. On estuarine sandy beaches, a major environmental factor influencing macrofaunal distribution is salinity. In this setting, the concurrent role of large-scale estuarine and morphodynamic gradients in shaping demographic patterns is still uncertain. To explain largescale variations in demographic aspects of the mole crab Emerita brasiliensis, 16 Uruguayan sandy beaches distributed along the estuarine gradient generated by the Rio de la Plata were characterized in terms of beach morphology, sediment traits and salinity over a 2 yr period. Abundance (total and discriminated by reproductive and recruitment components), biomass and body size of E. brasiliensis significantly increased from estuarine reflective to oceanic dissipative beaches. Further, generalized models (both additive and linear) showed that salinity, mean grain size and swash width were the most important explanatory factors of spatio-temporal variations in abundance. Sexually mature individuals and megalopae were almost absent in estuarine and oceanic reflective beaches, whereas oceanic dissipative beaches showed polymodal size structures with fully represented population components, together with extended reproductive and recruitment periods. We conclude that (1) morphodynamic and estuarine gradients are inextricably linked, affecting mole crab demography; and (2) estuarine and oceanic reflective beaches operate as sink habitats where populations do not prosper, whereas oceanic dissipative beaches act as source habitats. We thus provide empirical support to the source-sink hypothesis recently developed for sandy beaches. These long-term variations in demographic processes should be complemented by connectivity studies and genetic analyses in order to gain a deeper understanding of metapopulation dynamics in sandy beaches.KEY WORDS: Mole crab · Emerita · Demography · Salinity · Sandy beaches · Morphodynamics · Generalized additive models 398: 193-205, 2010 ing in lower abundance, fecundity, growth and survival rates than in dissipative beaches. In agreement with SEH and HHH predictions, studies conducted worldwide have shown a consistent decrease in community (McLachlan 1990, Defeo et al. 1992, McLachlan et al. 1993, Jaramillo et al. 2000, Soares 2003, Rodil & Lastra 2004, McLachlan & Dorvlo 2005 and population (truly intertidal species: Nel et al. 2001, de la Huz et al. 2002, Contreras et al. 2003 In relation to the patterns found at the population level, it has been postulated that post-settlement processes prevent intertidal species from establishing populations on reflective beaches. Moreover, it has been hypothesized that dissipative beaches can act as 'source' habitats, whereas reflective beaches would constitute 'sink' habitats where reproduction patterns of resident species are insufficient to balance mortality. This has been called the 'source-sink hypothesis' for intertidal sandy beach populations (Defeo & McLac...

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Effects of morphodynamic and estuarine gradients on the demography and distribution of a sandy beach mole crab: implications for source–sink habitat dynamics

Celentano¹,

Gutiérrez²,

Defeo³

2010

Mar. Ecol. Prog. Ser.

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“…Algumas espécies podem ser simbiontes de outros macroinvertebrados (Baeza et al, 2007). Em termos evolutivos, os Anomura são considerados a transição entre os camarões e os caranguejos braquiúros, abrangendo grupos diversos como os aeglídeos, galateídeos, pagurídeos; que apresentam como característica comum exclusiva a redução do quarto e quinto par de pereiópodes (Ruppert et al, 2005) Loureiro Fernandes (2005); (Schwamborn et al, 2001;Fernandes et al, 2002;Silva et al, 2004;Koettker e Freire, 2006;Schwamborn et al, 2008); Fransozo, 1987;de Farias Lima et al, 2005;Otegui & Soares-Gomes, 2007). Estas pesquisas contribuem para o maior conhecimento sobre o ciclo de vida das espécies (Boschi, 1981); para estudos de biologia pesqueira, juntamente com os dados de captura e biologia dos adultos (Fehlauer e Freire, 2002) e em estudos ecológicos e de manejo (Koettker e Freire, 2006).…”

Section: Introductionunclassified

Duração dos estágios do desenvolvimento pós-embrionário de Porcellana sayana leach, 1820 (Anomura: Porcellanidae) em laboratório

Morsoleto,

Werneck,

Macedo

et al. 2023

Cuad. Ed. Desar.

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Os porcelanídeos são Decapoda marinhos da Infraordem Anomura que apresentam grande importância económica e ecológica. Nos ecossistemas como elo entre a matéria orgânica particulada e os níveis tróficos superiores. Porcellana sayana é um, Porcellanidae com distribuição tropical e temperada, pertence a macro e megafauna bêntica associada da pesca dirigida ao camarão e aos bancos da vieira. Os representantes da Infraordem Anomura tem como característica possuir estágio larval constituído de pré-zoeia, duas fases de zoeia e megalopa. A proposta desse estudo foi estabelecer o tempo de vida de cada uma das fases de desenvolvimento de P. sayana, mantidas em condições de laboratório. As larvas foram obtidas de fêmeas ovígeras coletadas na região de Ubatuba – SP e mantidas em sala climatizada no laboratório do Departamento de Zoologia do Instituto de Biociências, UNESP Campus de Rio Claro. A temperatura foi mantida em 24 +/- 1 oC, a salinidade de 34 o/oo, sob fotoperíodo natural. Após a a eclosão 63 larvas foram transferidas individualmente, para placas de Petri de 20 ml com de água do mar previamente filtrada e aerada; receberam como alimento cerca de 40 náuplios recem-eclodidos. Diariamente foram constatadas a mortalidade e verificação da ocorrência de exúvias, com a consequente mudança de estágio. O tempo de duração de cada estágio larval foi anotado e analisado. Constatou-se que a duração média (em dias) para os estágios larvais de zoeia I foi de 5,9; zoeia II 9,9 e megalopa 10,7. A estratégia reprodutiva adotada por P. sayana condiz com o tamanho do ovo, redução dos estágios larvais e menor taxa de predação quando o organismo se encontra mas fases imaturas e como componente do plâncton. Estas pesquisas contribuem para o maior conhecimento sobre o ciclo de vida das espécies; para estudos de biologia pesqueira, juntamente com os dados de captura e biologia dos adultos e em estudos ecológicos e de manejo.

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“…Among them, the mole crab Emerita brasiliensis is an intertidal filter feeder found in reflective and dissipative beaches of the Atlantic coast of South America, from Venezuela to Uruguay (Defeo & Cardoso 2002, Celentano et al 2010. The mole crab presents a complex life cycle, with a planktonic larval phase that develops in the nearshore during 2 to 3 months and an adult benthic phase (Otegui & Soares-Gomes 2007). The precise distribution of E. brasiliensis larvae in the water column is not known; however, larvae for the congeneric Emerita analoga in Chile are found in the upper 15 m of the water column (Veas et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Assessment of larval connectivity in a sandy beach mole crab through a coupled bio-oceanographic model

Meerhoff

Defeo

Combes

et al. 2020

Estuarine, Coastal and Shelf Science

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This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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Desenvolvimento "in vitro" de larvas e juvenis de Emerita brasiliensis Schmitt (Crustacea, Decapoda, Hippidae) sob diferentes condições de temperatura, salinidade e regime alimentar

Cited by 5 publications

References 15 publications

Effects of morphodynamic and estuarine gradients on the demography and distribution of a sandy beach mole crab: implications for source–sink habitat dynamics

Effects of morphodynamic and estuarine gradients on the demography and distribution of a sandy beach mole crab: implications for source–sink habitat dynamics

Duração dos estágios do desenvolvimento pós-embrionário de Porcellana sayana leach, 1820 (Anomura: Porcellanidae) em laboratório

Assessment of larval connectivity in a sandy beach mole crab through a coupled bio-oceanographic model

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