Estudo hidrobiológico das lagôas de Piratininga e Itaipú

Oliveira, Lejeune P. H. de

doi:10.1590/s0074-02761948000400003

Cited by 11 publications

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“…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).…”

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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.

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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

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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.

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“…Situa-se a aproximadamente 15 Km do centro de Niterói, no estado do Rio de Janeiro. Este sistema é constituído por duas lagunas costeiras, sendo as primeiras de uma série de quinze, compreendidas entre os municípios de Niterói e Cabo Frio e formadas a partir da retenção das águas do mar pela formação de restingas (OLIVEIRA 1948).…”

Section: áRea De Estudounclassified

Ocorrência e distribuição de Cetengraulis edentulus (Cuvier) (Teleostei, Engraulidae) na Laguna de Itaipu, Niterói, Rio de Janeiro, Brasil

Sergipense

Rocha

2000

Rev. Bras. Zool.

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“…Sandbar openings, natural or artificial, are mentioned for many coastal lagoons in Rio de Janeiro State since decades past, as a way of letting in fish and marine crustacean larvae, for posterior growth and development, being processes supported by fishermen in order to increase the fishing productivity of the environments (Oliveira, 1948;. In the case of Imboassica lagoon, the process of sandbar opening must take into account the reproduction season of the Penaeidae at the sea, aiming to maximize the entrance of larvae, and the reproduction season of Palaemonidae, in order to balance the populations of different species and to increase the fishing productivity.…”

Section: C) Imboassica Lagoonmentioning

confidence: 99%

Larvae and post-larvae of Penaeidae and Palaemonidae in coastal lagoons of the North of Rio de Janeiro (Macaé, RJ)

1999

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The northern part of the state of Rio de Janeiro shelters many coastal lagoons, located, mostly, in the "restinga" strip that stretches from the municipality of Macaé to the municipality of Quissamã. During 1995 and 1996 samplings were made aiming to verify the diversity and density of Natantia larvae in the Imboassica, Cabiúnas and Comprida lagoons. The monthly samples were taken with a 500 µ net, in horizontal drags from a boat. In Comprida lagoon no larvae of any family of these crustaceans were found. In Cabiúnas lagoon, the autumn was the season of the year with greatest relative abundance, the larvae belonging to only one genus: Macrobrachium. In Imboassica Lagoon samples were taken in two situations related to the variation of the water level and contact with sea water: horizontal boat dragging when the sandbar (the strip of sand that separates the lagoon from the sea) was closed, larvae of Macrobrachium sp. being found, and no seasonal variation being detected, and horizontal manual dragging with open and closed sandbar conditions, in a region close to the sandbar.With the sandbar open, larvae and post-larvae of Penaeus paulensis and P. brasiliensis were found, the greatest abundances being found in the months of April/96 and May/95.Key words: coastal lagoons, larvae, Penaeidae, Palaemonidae, Crustacea, distribution. RESUMO Larvas e pós-larvas de Penaeidae e Palaemonidae em lagoas costeiras do norte fluminense (Macaé, RJ)A região norte do estado do Rio de Janeiro abriga uma série de lagoas costeiras, localizadas, em sua maioria, na região da restinga que se estende do município de Macaé ao município de Quissamã. Durante 1995 e 1996 foram realizadas coletas com o objetivo de verificar a diversidade e densidade de larvas de Natantia nas lagoas Imboassica, Cabiúnas e Comprida. As coletas mensais foram realizadas com rede de 500 µ em arrastos horizontais com barco. Na lagoa Comprida não foram encontradas larvas de nenhuma família destes crustáceos. Na lagoa Cabiúnas, o outono foi a estação do ano com maior abundância relativa, sendo as larvas pertencentes a um único gênero: Macrobrachium. Na lagoa Imboassica foram realizadas coletas em duas situações em relação à variação do nível d'água e contato com o mar: arrastos horizontais de barco com a barra (faixa de areia que separa a lagoa do mar) fechada, sendo encontradas larvas de Macrobrachium sp, não se encontrando diferença em relação à estação do ano, e arrastos horizontais manuais, com barra fechada e aberta, na região próxima à barra da lagoa. Com a barra aberta, foram coletadas larvas e pós-larvas de Penaeus paulensis e P. brasiliensis, sendo as maiores abundâncias registradas nos meses de abril/96 e maio/95.

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Estudo hidrobiológico das lagôas de Piratininga e Itaipú

Cited by 11 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

Ocorrência e distribuição de Cetengraulis edentulus (Cuvier) (Teleostei, Engraulidae) na Laguna de Itaipu, Niterói, Rio de Janeiro, Brasil

Larvae and post-larvae of Penaeidae and Palaemonidae in coastal lagoons of the North of Rio de Janeiro (Macaé, RJ)

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