Ichthyoplankton distribution and abundance off southeastern and southern Brazil

Freitas, Débora M. de; Muelbert, Jose H

doi:10.1590/s1516-89132004000400014

Cited by 24 publications

(23 citation statements)

References 12 publications

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“…Mean eggs abundance ranges in Ibiraquera Lagoon were comparable with coastal areas from Bahia to Santa Catarina State (Franco & Muelbert, 2003;Freitas & Muelbert, 2004;Mafalda Jr. et al, 2004) and the rio de la Plata estuary (Berasategui et al, 2004). The mean abundance of fish larvae was higher than along the adjacent coast (Franco & Muelbert, 2003;Freitas & Muelbert, 2004) and than in the rio de la Plata estuary (Berasategui et al, 2004), but was lower than the channel area of laguna dos Patos (Muelbert & Weiss, 1991).…”

Section: Discussionmentioning

confidence: 59%

“…The mean abundance of fish larvae was higher than along the adjacent coast (Franco & Muelbert, 2003;Freitas & Muelbert, 2004) and than in the rio de la Plata estuary (Berasategui et al, 2004), but was lower than the channel area of laguna dos Patos (Muelbert & Weiss, 1991). Due to the small dimensions of Ibiraquera lagoon in relation to the systems cited above and its abundance of ichthyoplankton, we can consider it a spawning and nursery area.…”

Section: Discussionmentioning

confidence: 89%

“…Ekau et al, 1999;Tovar-Faro & Bonecker, 2000;Barletta-Bergan et al, 2002a;Franco & Muelbert, 2003;Freitas & Muelbert, 2004;Castro et al, 2005). However, coastal lagoons are also considered nursery areas for coastal fish (Sánchez-Velasco et al, 1996;Avendaño-Ibarra et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…Life cycles of many commercial species are related to estuaries (Castro & Bonecker, 1996;Esper et al, 2001;Franco & Muelbert, 2003;Freitas & Muelbert, 2004). The southern Brazilian continental shelf is one of the most productive fishing areas of Brazil's 8,500 km coast.…”

Section: Introductionmentioning

confidence: 99%

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Spatial and temporal distribution of fish eggs and larvae in a subtropical coastal lagoon, Santa Catarina State, Brazil

2009

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This study investigated the variation in abundance, distribution and composition of ichthyoplankton in a lagoon in southern Brazil through the year and at different stations within the lagoon. Ibiraquera Lagoon is a shallow coastal lagoon connected to the sea by a semi-permanent sandbar. Ichthyoplankton samples were collected monthly from December 2003 to December 2004, with a 200 µm mesh net using horizontal surface hauls. A colder, drier period was detected, contrasting with warm months during which salinity varied depending on rainfall and whether the sandbar was open or closed. The mean abundance of ichthyoplankton over the study period was 459.6 ± 76.2 (SE) eggs · 100 m -3 and 63.6 ± 7.9 (SE) larvae · 100 m -3 , and they were present during all months. Significantly higher abundances of eggs and larvae were observed during warm months. The community was dominated by the family Engraulidae followed by Clupeidae, Gobiidae and Mugilidae. Engraulidae and Clupeidae were present throughout the year, with greater abundances in months with higher temperatures. Some coastal fish species spawn in Ibiraquera Lagoon, mainly near to the sandbar, demonstrating that the lagoon is a spawning area for coastal stock. We recommend the establishment of environmental procedures to promote the conservation of Ibiraquera Lagoon and its ichthyoplankton community.A abundância, distribuição e composição do ictioplâncton foram investigadas em uma lagoa no sul do Brasil durante um ano e em diferentes estações dentro da lagoa. A lagoa de Ibiraquera é uma lagoa costeira rasa, conectada ao mar através de uma barra semi-permanente. As amostras de ictioplâncton foram coletadas mensalmente entre dezembro de 2003 e dezembro de 2004, com uma rede cônico-cilíndrica de 200 µm de malha em arrastos horizontais e de superfície. Foi detectado um período frio e seco em contraste aos meses quentes e com variação na salinidade em função das chuvas e da barra estar aberta ou fechada. A abundância média do ictioplâncton, durante o período de estudo, foi de 459,6 ± 76,2 (SE) ovos · 100 m -3 e 63,6 ± 7,9 (SE) larvas · 100 m -3 , e ocorreram em todos os meses. As abundâncias de ovos e larvas foram significativamente maiores nos meses quentes. A comunidade foi dominada pela família Engraulidae seguida pelas famílias Clupeidae, Gobiidae e Mugilidae. As famílias Engraulidae e Clupeidae ocorreram principalmente nos meses com maiores temperaturas. Alguns peixes costeiros desovam dentro da lagoa, principalmente próximo a barra, evidenciando que a lagoa é uma área de desova para o estoque costeiro. Recomenda-se o estabelecimento de ações ambientais que promovam a conservação da lagoa de Ibiraquera e da comunidade ictioplanctônica.

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Section: Discussionmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spatial and temporal distribution of fish eggs and larvae in a subtropical coastal lagoon, Santa Catarina State, Brazil

2009

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“…This tendency may be related to the cyclic upwelling phenomena which occurs in summer months in the Brazilian southeastern region, bringing cold and nutrient-rich waters close to the coastal zone. Other studies on this region showed that plankton biomass, production and consumption were higher in summer months than in winter (Freitas & Muelbert, 2004).…”

Section: Discussionmentioning

confidence: 66%

Reef fish community structure on three islands of Itaipu, Southeast Brazil

2008

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We provide here the first assessment of the composition, abundance and distribution of rocky reef fishes of Itaipu Sound, Rio de Janeiro, off the southeastern Brazilian coast. Monthly visual censuses, benthic quadrats and chain link transects were conducted over one year on rocky reefs at three islands (Menina, Mãe and Pai). A total of 2466 individual fish, belonging to 29 families and 42 species were recorded. The most abundant fish species were Parablennius pilicornis, Haemulon steindachneri, Orthopristis ruber and Diplodus argenteus. Sheltered and complex habitats showed the most abundant and diverse fish populations. There was a major significant separation between sampling sites and a secondary seasonal pattern. The three sites showed similar fish communities with locally structured environmental gradients according to their inherent habitat characteristics.Apresentamos aqui o primeiro estudo da composição, abundância e distribuição de peixes recifais nos recifes rochosos da enseada de Itaipu, Rio de Janeiro, Brasil. Foram realizados mensalmente censos visuais, quadrats de composição bentônica e transectos com correntes durante um ano em recifes rochosos de três ilhas (Menina, Mãe e Pai). Um total de 2466 peixes pertencentes a 29 famílias e 42 espécies foi registrado. Os peixes mais abundantes foram Parablennius pilicornis, Haemulon steindachneri, Orthopristis ruber e Diplodus argenteus. Os recifes mais abrigados e com maior complexidade de hábitats foram os que apresentaram maior abundância e diversidade de espécies. Análises estatísticas revelaram distinções significativas entre as áreas amostradas e um padrão sazonal secundário. As três áreas apresentaram basicamente a mesma comunidade de peixes, estruturadas a partir de gradientes ambientais e de características estruturais próprias de cada ilha.

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