Observações biogeográficas durante a abertura da Barra da Lagoa de Saquarema

Oliveira, Lejeune de; Krau, Luiza

doi:10.1590/s0074-02761955000200021

Cited by 7 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Its larvae need brackish waters for their development (DOBKIN 1970), and it is for this reason classified as a coastal continental species by COELHO & RAMOS- PORTO (1985). The information about the species in the coast of Rio de Janeiro is composed by a few observations by OLIVEIRA (1948) and OLIVEIRA & KRAU (1955), and in recent years by ALBERTONI (l998a, b) and ALBERTONI et ai. (1999,2001).…”

mentioning

confidence: 99%

Distribution and growth in adults of Macrobrachium acanthurus Wiegmann, (Decapoda, Palaemonidae) in a tropical coastal lagoon, Brazil

Albertoni

Palma‐Silva²,

Esteves

2002

Rev. Bras. Zool.

View full text Add to dashboard Cite

ABSTRACT. MacrobrachiwlI acalllhurlls Wiegmann, 1836 is a Palaemonidae commonly found in Brazilian coastal environments. At Imboassica lagoon, located in the north of the State of Rio de Janeiro, it is found in two stages of its life cycle: as larvae and as reproductive adults. This work had as its goal the evaluation of adults distribution , estimating the weight/length relationship and the condition factor of these adults. After sampling in two regions of the lagoon, one interior and another closer to the ocean, we verified that females are found in a greater propol1ion close to the ocean. and males are found in greater number in the innermost region, amidst the aquatic macrophytes , suggesting that the fecundation takes place in this lasi area and the females then travel to the area closer to the ocean to spawn. Total and carapace weight/length relationship exhibited differences between males and females, presenting positive allometric growth. The relative growth of the cephalotorax related to total length showed that it correspond to 53% of the total length in females , and 50% in males . The average condition factor was significantly lower than the expected pattern, demonstrating that the species does not find ideal conditions in the lagoon. T his may be attributed to the migration of the adults, to the spawning and/or to the impact caused by the frequent sandbar openings that took place at Imboassica lagoon during the studied period. KEY WORDS. Palaemonidae, Ma crobrachiul11 (lean/hurl/s, coastal lagoon, weight/length relationship , condition factorThe genus Macrobrachium Bate, 1868 encompasses species that thrive in lotic and lentic env ironments, being found in several aq u atic systems in Brazi l, both in freshwater and in mesohaline environments (COELHO & RAMOS-PORTO 1985;VALENTI 1985). Studies focusing on different ecological and biological aspects of several species have been executed in some areas in Brazil , and among them we may under li ne the works

show abstract

mentioning

confidence: 99%

Distribution and growth in adults of Macrobrachium acanthurus Wiegmann, (Decapoda, Palaemonidae) in a tropical coastal lagoon, Brazil

Albertoni

Palma‐Silva²,

Esteves

2002

Rev. Bras. Zool.

View full text Add to dashboard Cite

show abstract

“…Indeed, between the XVII and XIX centuries a connection between the lagoon and the sea opened naturally. Afterward, only with the intervention of man, it was possible to reestablish such connection (Oliveira and Krau, 1955). The cartography represents a pronounced submerse sand bank along the coast of Saquarema and Araruama lagoons, as it can be seen on the maps of 1715 ( Fig.…”

Section: Date Location Sourcementioning

confidence: 95%

An Approach to the Contribution of Anthropogenic Actions for the Araruama Lagoonal System (Se Brazil) Geomorphological Evolution / Uma Abordagem Sobre a Influência Antropogênica Na Evolução Geomorfológica Do Sistema Lagunar De Araruama (Se, Brasil)

2018

View full text Add to dashboard Cite

The first studies regarding the constitution of the Araruama lagoonal system, located in the Rio de Janeiro state (SE Brazil), were carried out by Alberto Ribeiro Lamego. This author supported the thesis that it had resulted from the formation of a sand barrier (called Massambaba) due to the longitudinal transport of large quantities of sediments through coastal drift currents, and the growth of spits parallel to the shoreline. However, most recent studies largely rejected it, sustaining that the confinement of these hydric environments was the result of the growth of two sand barriers during the Pleistocene and Holocene times (120.000 to 7.000 years before present - BP) due to the sea level changes. The hypothesis that we suggest, is that both propositions are acceptable and complementary. This study aims to demonstrate that, despite the opinions on the formation of the double sand barrier, deposition of sediments by coastal drift currents at the end of the Holocene, and especially in recent chronologies, also contributed to the establishment of this lagoon system. In our opinion, the increased sediment supplies due to human activities contributed to the formation of the inner spits and the nearby sea sandbar. Its orientation was influenced by the existence of the island of Cabo Frio, that allowed the formation of the tombolo that almost connected it to the continent. Through the analysis of historical and cartographic documents related to the colonization and economic exploitation of the region, it is evident that the anthropogenic actions played a significant role in the sandy spits formation. Of these, special emphasis is placed on the agriculture and deforestation that contributed to the increase of sedimentary accumulation. This work demonstrate that the analysis of historical documents can provide information and contribute to the understanding of recent coastal developments. ResumoOs primeiros estudos sobre a constituição do sistema lagunar de Araruama, localizado no estado do Rio de Janeiro (SE Brasil), foram realizados por Alberto Ribeiro Lamego. Este autor apoiou a tese de que este sistema lagunar resultou da formação de uma barreira arenosa (denominada Massambaba) na sequência do transporte longitudinal de grandes quantidades de sedimentos através das correntes costeiras de deriva litorânea e ao crescimento de flechas arenosas paralelas à linha de costa. No entanto, estudos mais recentes, rejeitaram amplamente esta hipótese, e sugeriram que o confinamento desses ambientes lagunares resultou do crescimento de duas barreiras arenosas na sequência de mudanças no nível do mar ocorridas durante os períodos Pleistocénicos e Holocênico (120.000 a 7.000 anos antes do presente - BP). A hipótese que sugerimos é que ambas as hipóteses são aceitáveis e complementares. Este estudo tem como objetivo demonstrar que, apesar das opiniões sobre a formação da dupla barreira de areia, a deposição de sedimentos por correntes de deriva costeira no final do Holoceno, e principalmente em cronologias recentes, também contribuiu para o estabelecimento deste sistema lagunar. Em nossa opinião, o aumento do fornecimento de sedimentos devido às atividades humanas contribuiu para a formação das flechas arenosas interiores e do banco de areia exterior, próximo do mar. A sua orientação foi influenciada pela existência da ilha de Cabo Frio, que permitiu a formação do tombolo que quase a conectou ao continente.Através da análise de documentos históricos e cartográficos relacionados com a colonização e exploração econômica da região, evidencia-se que as ações antropogênicas tiveram um papel significativo na formação das flechas arenosas. De entre estas, salienta-se especialmente a agricultura e o desmatamento que contribuíram para o aumento da acumulação sedimentar. Este trabalho evidencia que a análise de documentos históricos pode fornecer informações e contribuir para a compreensão da evolução recente do litoral.

show abstract

The colonization of a coastal lagoon by a mangrove ecosystem: Benefit or threat to the lagoon?

et al. 2021

View full text Add to dashboard Cite

Observações biogeográficas durante a abertura da Barra da Lagoa de Saquarema

Cited by 7 publications

References 0 publications

Distribution and growth in adults of Macrobrachium acanthurus Wiegmann, (Decapoda, Palaemonidae) in a tropical coastal lagoon, Brazil

Distribution and growth in adults of Macrobrachium acanthurus Wiegmann, (Decapoda, Palaemonidae) in a tropical coastal lagoon, Brazil

An Approach to the Contribution of Anthropogenic Actions for the Araruama Lagoonal System (Se Brazil) Geomorphological Evolution / Uma Abordagem Sobre a Influência Antropogênica Na Evolução Geomorfológica Do Sistema Lagunar De Araruama (Se, Brasil)

The colonization of a coastal lagoon by a mangrove ecosystem: Benefit or threat to the lagoon?

Contact Info

Product

Resources

About