On the uneven distribution of the Copelata of the Fernando de Noronha area

Björiberg, T. K. S.; Forneris, Liliana

doi:10.1590/s0373-55241956000100006

Cited by 11 publications

(5 citation statements)

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“…This observation was in accordance with Bjornberg & Forneris (1956) and Forneris (1965) who report this species as common in mixing waters, e .g . at the boundary of coastal and oceanic areas .…”

Section: Discussionsupporting

confidence: 93%

Spatial structure of the zooplankton community in the Cabo Frio region (Brazil) influenced by coastal upwelling

Valentin

1984

Hydrobiologia

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Cabo Frio area (Central-southern Brazilian littoral) is characterized by a coastal upwelling due to prevailing E-NE winds, mainly during the spring-summer season .The geographic distribution of the zooplankton was described in order to separate ecological areas in terms of specific communities . Cluster analysis by weighted pair-group method (W PGA) and principal component (PC) analysis was performed on the most important hydrological parameters and zooplankton taxa . The first PC, explaining 38% of the total zooplankton variability, represented the influence of the nearshore-offshore gradient . Zooplankton communities and ecological areas were defined as follows :i) nearshore neritic : the richest region with more than 5 000 org. M-3 . In this very narrow nearshore region we observed 3 groups of taxa deliminated by upwelling effects and trophic conditions : a) Ctenocalanus vanus, Penilia avirostris, Calanoides carinatus and Copepod larva, all herbivorous species associated with the phytoplankton blooms in the upwelling zone ; b) Creseis acicula and Temora stylifera; c) Siphonophora, Chaetognaths and a high diversity of Copepoda dominated by Coryceus amazonicus, C. giesbrechti, Eucalanus pileatus, Clausocalanus acuicornis, all carnivorous or omnivorous feeders representing a high degree of complexity of the ecosystem .ii) offshore neritic : characterized by appendicularians, this region constitutes an intermediate zone between coastal and oceanic waters .iii) oceanic : occupied by the Brazil Current where zooplankton is poor, but diversified, with typical copepods from tropical warm water

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Section: Discussionsupporting

confidence: 93%

Spatial structure of the zooplankton community in the Cabo Frio region (Brazil) influenced by coastal upwelling

Valentin

1984

Hydrobiologia

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“…It has been the aim of the Instituto Oceanográfico to study the water masses off the southern coast of Brazil not only hydrographically (Emilsson, 1959(Emilsson, -1961 but also biologically (Bjornberg & Forneris, 191;)6a;1956b;Vannucci, 1957a;Almeida Prado, 1961). A natural consequence of these studies is the determination of the ecological parameters of each species in the area studied.…”

Section: Introductionmentioning

confidence: 99%

On the marine free-living copepods off Brazil

Björnberg¹

1963

Bol. Inst. Oceanogr.

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“…However, other jellyfish species, with a much lower abundance in comparison with the abundant species, generally appear together. This is not an exclusive phenomenon of jellyfish, as it has also been recorded for appendicularians [17]- [22]. Several studies have been carried out, with different sampling areas, periods and sampling intensity, on the seasonal variation, distribution and abundance of jellyfish throughout the Gulf of Mexico and Mexican Caribbean [23]- [32].…”

Section: Introductionmentioning

confidence: 99%

Segregated Distribution of Liriope tetraphylla, Aglaura hemistoma and Nausithoe punctata (Cnidaria) in the Southern Gulf of Mexico

Flores-Coto¹,

Tapia²,

Añorve³

et al. 2016

OJE

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In order to study the segregated distribution of the three most abundant jellyfish species in the southern Gulf of Mexico, a total of 85 stations were sampled during an oceanographic cruise from 19 May to 18 June 2006. Trawling took place from surface to a maximum depth of 200 m, using a Bongo net with a 61 cm mouth diameter and 333 and 500 µm mesh sizes. Temperature and salinity were recorded. Samples were preserved in 4% formalin, neutralized with sodium borate, and changed to 70% ethylic alcohol after 24 hours for conservation. The jellyfish data were standardized to 100 m 3 of filtered water. A total of 10,610 jellyfish were collected from the 333 µm mesh size net, of which eight species represented 88.49% of the total density: Aglaura hemistoma, Liriope tetraphylla, Nausithoe punctata, Clytia hemisphaerica, Persa incolorata, Obelia spp., Clytia folleata and Eutima gracilis. The former three species are the subject of this study. The results obtained indicate that the high density areas of these three species have a segregated distribution. -A. hemistoma, 0.88; L. tetraphylla -N. punctata, 0.86 and A. hemistoma -N. punctata, 0.84. The spatial distribution of the high density areas of these species fits well with the three hydrodynamically different areas: A. hemistoma in Campeche Bank, L. tetraphylla on the Campeche and Tabasco shelves and N. punctata in Campeche Bay. This spatial distribution pattern corresponds to their main habitat and reproductive habits of the species, as well as the influence of the hydrodynamics that dominate each area. Segregation values (White's index) recorded between pairs of specie were very high: L. tetraphylla

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On the uneven distribution of the Copelata of the Fernando de Noronha area

Cited by 11 publications

References 0 publications

Spatial structure of the zooplankton community in the Cabo Frio region (Brazil) influenced by coastal upwelling

Spatial structure of the zooplankton community in the Cabo Frio region (Brazil) influenced by coastal upwelling

On the marine free-living copepods off Brazil

Segregated Distribution of <i>Liriope tetraphylla</i>, <i>Aglaura hemistoma</i> and <i>Nausithoe punctata</i> (Cnidaria) in the Southern Gulf of Mexico

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On the uneven distribution of the Copelata of the Fernando de Noronha area

Cited by 11 publications

References 0 publications

Spatial structure of the zooplankton community in the Cabo Frio region (Brazil) influenced by coastal upwelling

Spatial structure of the zooplankton community in the Cabo Frio region (Brazil) influenced by coastal upwelling

On the marine free-living copepods off Brazil

Segregated Distribution of &lt;i&gt;Liriope tetraphylla&lt;/i&gt;, &lt;i&gt;Aglaura hemistoma&lt;/i&gt; and &lt;i&gt;Nausithoe punctata&lt;/i&gt; (Cnidaria) in the Southern Gulf of Mexico

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Segregated Distribution of <i>Liriope tetraphylla</i>, <i>Aglaura hemistoma</i> and <i>Nausithoe punctata</i> (Cnidaria) in the Southern Gulf of Mexico