Artificial reef influence on the surrounding infauna—north coast of Rio de Janeiro State, Brazil

2011 ◽  
Vol 92 (6) ◽  
pp. 1289-1299 ◽  
Author(s):  
Ilana Rosental Zalmon ◽  
Catarina Dalvi Boina ◽  
T.C.M. Almeida
Keyword(s):  
Rio De Janeiro ◽  
Artificial Reef ◽  
Artificial Reefs ◽  
North Coast ◽  
Taxon Richness ◽  
Benthic Assemblages ◽  
The North ◽  
Eastern Brazil ◽  
Macrobenthic Assemblages ◽  
The Relationship

There have been many efforts to appraise the extent to which artificial reefs affect the surrounding community, but few studies addressed whether benthic assemblages change with distance from the reef. We experimentally assessed the relationship between infauna abundance and richness with increased distance (0, 5, 25, 50, 100 and 300 m) from reefballs deployed on a flat and homogeneous bottom, 9-m deep, on the north coast of Rio de Janeiro, south-eastern Brazil. Benthic taxon richness and abundance varied significantly between surveys with higher values in February 2007. Both numerical indicators changed similarly with distance, but more noticeably between 300 m and the other distance treatments where abundance was highest. A non-metric multidimensional scaling ordination revealed that macrobenthic assemblages were very heterogeneous with significant differences between surveys but not among sampling distances. A canonical correspondence analysis including species, distances and sediment variables showed that the distances 5, 25 and 100 m were related to organic matter and mud (fine sediment), while 0 and 300 m distances were more related to the non-organic variables, such as the percentage of gravel, sand and calcium carbonate. Spatial variations in the parameters of the sediment alone did not explain the distribution of the associated infauna, given the similarity of the community at different distances. It is suggested that the influence of artificial reefs is quickly dissipated due to strong bottom sea currents, indicating a reduced impact or influence of these reefs on the surrounding infauna.

scholarly journals Epibenthic colonization on an artificial reef in a stressed environment off the north coast of the Rio de Janeiro State, Brazil

2008 ◽  
Vol 51 (1) ◽  
pp. 213-221 ◽  
Author(s):  
Werther Krohling ◽  
Ilana Rosental Zalmon
Keyword(s):  
Rio De Janeiro ◽  
Artificial Reef ◽  
Structural Difference ◽  
Empty Space ◽  
Stress Factors ◽  
North Coast ◽  
Limiting Factor ◽  
Entire Study ◽  
Species Dominance ◽  
The North

The influence of sedimentation and turbidity caused by the pluviometric precipitation and by the Paraiba do Sul River during the summer was investigated on an artificial reef along the north coast of Rio de Janeiro, Brazil. Four recruitment and four cumulative plates were removed monthly (January 2002 to February 2003) from the external surface of the concrete reef modules. Empty space was not a limiting factor the recruitment. Turnover rate and structural difference index were higher in the first months and reflected low change in the species dominance during almost the entire study period. The high correlation between the precipitation and the empty space suggested that rain influence the recruitment and the succession. The recruitment was possible despite stress factors such as sedimentation, turbidity, abrasion, strong bottom currents and a lack of natural consolidated substrate. Changes in the community structure reflected the substrate colonization history of a few resistant species and their subsequent interactions.

Dispersal of yellowtail kingfish (Seriola lalandi) from a coastal embayment following a recreational fisheries enhancement stocking program: attempts to integrate aquaculture and habitat-based initiatives

2021 ◽  
Author(s):  
Alistair Becker ◽  
Michael B Lowry ◽  
D Stewart Fielder ◽  
Matthew D Taylor
Keyword(s):  
Artificial Reef ◽  
Artificial Reefs ◽  
Recreational Fisheries ◽  
Dispersal Patterns ◽  
The North ◽  
Sea Ranching ◽  
In The Wild ◽  
Yellowtail Kingfish ◽  
Seriola Lalandi ◽  
Fisheries Enhancement

Fisheries enhancement initiatives including marine stocking and artificial reef deployments are becoming increasingly common in many parts of the world. Combining the two by releasing hatchery reared fish onto artificial reefs is used in sea-ranching operations but is an approach rarely adopted for recreational fisheries. Yellowtail kingfish (Seriola lalandi) form a valuable recreational fishery in Australia and in 2018 a pilot stocking program was initiated to enhance this fishery. Fish were released onto estuarine artificial reefs in Botany Bay to evaluate if estuarine artificial reefs are suitable release habitat for juvenile yellowtail kingfish and to monitor their dispersal patterns using acoustic telemetry and a tag-recapture program. Both approaches showed similar patterns, indicating juvenile yellowtail kingfish rapidly dispersed from the release location and can travel at least 60 km during their first weeks in the wild. Twenty percent of the acoustically tagged fish entered nearby estuaries to the north and south and tagged fish were also recaptured in these estuaries, indicating that the estuaries provide habitat for juveniles. There was little interaction between stocked fish and two large coastal artificial reefs positioned near Botany Bay. Stocked yellowtail kingfish will likely disperse rapidly from release locations which is consistent with their pelagic life history. While this may present challenges to fisheries managers, increasing release numbers to maintain stocking densities over a broader area may provide a solution. Future releases of fish on coastal natural and artificial reefs are an important next step in refining stocking practices for this species and will help further identify key juvenile habitats.

Interspecific cetacean interactions during the breeding season of humpback whale (Megaptera novaeangliae) on the north coast of Bahia State, Brazil

2009 ◽  
Vol 89 (5) ◽  
pp. 961-966 ◽  
Author(s):  
Marcos R. Rossi-Santos ◽  
Elitieri Santos-Neto ◽  
Clarêncio G. Baracho
Keyword(s):  
Breeding Season ◽  
Megaptera Novaeangliae ◽  
Humpback Whales ◽  
North Coast ◽  
Balaenoptera Acutorostrata ◽  
Cetacean Species ◽  
The North ◽  
Eastern Brazil ◽  
North Eastern ◽  
Stenella Attenuata

The large majority of cetacean interspecific studies report only on dolphin interactions, while studies on interactions between odontocete and mysticete are less common. The present work aims to report on sightings of cetacean interactions, during the breeding season of humpback whales(Megaptera novaeangliae), along 370 km of the Bahia State, north-eastern Brazil, addressing aspects of cetacean distribution and behaviour. During 7 seasons (2000–2006), a total of 230 research cruises were performed, in which 38 events of interactions among humpback whales and other cetaceans(Tursiops truncatus, Steno bredanensis, Peponocephala electraandBalaenoptera acutorostrata)were observed, plus another 5 encounters without the whale's presence, includingT. truncatus, S. bredanensis, P. electra, Stenella clymeneandStenella attenuata. Our results confirm the occurrence of multiple cetacean species in the Bahia State, being the first study in the world to report on a large range of interactions involving another 4 cetacean species, grouped with up to 3 mixed species per sighting, with humpback whales in their annual breeding ground.

scholarly journals Considerações sobre estromatólito do tipo domal da Lagoa Salgada, Estado do Rio de Janeiro, Brasil

2007 ◽  
Vol 30 (1) ◽  
pp. 50-57
Author(s):  
Loreine Hermida Silva e Silva ◽  
Anderson Andrade Cavalcanti Iespa ◽  
Cynthia Moreira Damazio-Iespa
Keyword(s):  
Rio De Janeiro ◽  
The State ◽  
North Coast ◽  
Carbonate Precipitation ◽  
Mollusk Shells ◽  
The Third ◽  
The North ◽  
Internal Morphology

The lagoa Salgada is situated on the north coast of the State of Rio de Janeiro, between the districts of Campos dos Goytacazes and São João da Barra, at 41º00'30'' W and 21º54'10''S. In the margins of the lagoon the presence of recent stromatolitic constructions was verified. The stromatolite may be defined as lithified biosedimentary structure, growing through the increase of sediment blade trapping by the carbonate precipitation as result of microbian organism activity. The objective of this study was to describe and to determine the internal morphology of domal type stromatolite of the lagoa Salgada. Through cutting, three different stages were observed: the first (base) is present as a thrombolitic stage with spread blade; the second (intermediary) is a thrombolitic-stromatolitic stage with spread and continuous blade; the third (top) is stromatolitic and the most recent stage of the structure, presenting continuous blade and with interruptions rare. Besides the presence of cyanobacteria and mollusk shells, were observed also internee palinomorphs inside the domal stromatolite. It was possible to observe that filament cyanobacteria contributed to the formation of blade of domal stromatolite and the microgastropod contributed for the destruction of the blade.

scholarly journals Composição dos estromatólitos estratiformes da lagoa Salgada, Rio de Janeiro, Brasil

2008 ◽  
Vol 31 (2) ◽  
pp. 42-49
Author(s):  
Loreine Hermida da Silva e Silva ◽  
Anderson Andrade Cavalcanti Iespa ◽  
Cynthia Moreira Damazio Iespa
Keyword(s):  
Calcium Carbonate ◽  
Rio De Janeiro ◽  
North Coast ◽  
Carbonate Precipitation ◽  
Filamentous Cyanobacteria ◽  
The North ◽  
Microcoleus Chthonoplastes

Lagoa Salgada is situated in the north coast of State of Rio de Janeiro, between the districts of Campos dos Goitacazes and São João da Barra, some 41º00'30" W and 21º54'10"S. In the margins of the lagoon the presence of recent stromatolitic constructions was verified. The stromatolite may be defined as lithifying biosedimentary structure, growing through of sediment blade trapping by the carbonate precipitation as result of microbian organism activity. The aim of this study was to characterize the cyanobacteria assemblage in stratiform stromatolites found on the floor of lagoa Salgada. Within the stratiform stromatolites 21 species of cyanobacteria were found, Microcoleus chthonoplastes (Thuret) Gomont 1892 and Lyngbya aestuarii (Liebman) Gomont 1892 are frequent in these stromatolites. The presence of calcite was observed in the stratiform stromatolites. The filamentous cyanobacteria are responsible for the union and imprisonment of sediment to form the layers in the stromatolites. The skeleton remains of mollusks, foraminifers and ostracod found in the area, work as a source of calcium carbonate and of sediment to structure the stromatolites

The effect of an artificial reef system on the transient fish assemblages – south-eastern coast of Brazil

2014 ◽  
Vol 95 (3) ◽  
pp. 635-646 ◽  
Author(s):  
Diogo Fonseca Da Rocha ◽  
Marcos Alberto Lima Franco ◽  
Pedro Vianna Gatts ◽  
Ilana Rosental Zalmon
Keyword(s):  
Rio De Janeiro ◽  
Fish Assemblages ◽  
Artificial Reef ◽  
Fish Population ◽  
Artificial Reefs ◽  
Functional Structure ◽  
Eastern Coast ◽  
Northern Coast ◽  
Protective Environment ◽  
Janeiro State

Artificial reefs (ARs) are often used to improve fishing and, consequently, the economy of a region. However, the way in which the species use the reefs may vary between fish assemblages. An assessment was made of the influence of an AR complex on the transient fish population off the northern coast of Rio de Janeiro state and, therefore, two control areas were sampled. Gillnets were used to capture individual fish in six sampling surveys. Cumulative abundance and biomass curves (ABC) were used to assess the possible effects of the reefs on the community's functional structure. In the dry season, during which the influence of the Paraíba do Sul River is smaller, a larger richness of r-strategy species and juveniles of K-strategy species was observed in the reef area compared with the control areas, suggesting that the AR acts as a protective environment for these species. During the lower river discharge period the results indicated a potential disturbance in the functional structure of the AR fish community and, therefore, a less stable environment relative to the control areas. This ‘instability’ warrants a positive connotation, as it indicates that the artificial reefs are harbouring species that are particularly sensitive to predation, making the reef a powerful tool for maintaining these populations on the northern coast of Rio de Janeiro.

scholarly journals Mapeamento geológico-geotécnico preliminar, utilizando geoprocessamento, no município de Campos dos Goytacazes, Estado do Rio de Janeiro

2008 ◽  
Vol 31 (1) ◽  
pp. 50-64
Author(s):  
Aline Nogueira Costa ◽  
Helena Polivanov ◽  
Maria Da Glória Alves
Keyword(s):  
Physical Environment ◽  
Rio De Janeiro ◽  
Data Bank ◽  
Environmental Problems ◽  
Future Generations ◽  
North Coast ◽  
The North ◽  
Field Information ◽  
The City ◽  
Janeiro State

Campos dos Goytacazes County is located on the north coast of Rio de Janeiro State. The city of Campos dos Goytacazes was developed on a flooding plain and due to the fragility of the physical environment; the city has been suffering serious environmental problems. The methodology used base in acquisition of data bank, remote sensoring techniques, Field Information and application of SIG ArcGis9. In a first step, the themes geology, pedology and geomorphology units was overlaying, where could obtain a Geological-Geotechnical Units Map, with lowed and elevated units, the which had been defined in accordance with its characteristics. The purpose of this map, as well as the objective of the work is to plan the territory for the future generations

Cosmarium bahianum, sp. nov. (Desmidiaceae), a new desmid species from a phytotelm habitat in the Brazilian restinga

Phytotaxa ◽  
2017 ◽  
Vol 291 (1) ◽  
pp. 66 ◽  
Author(s):  
GERALDO JOSÉ PEIXOTO RAMOS ◽  
CARLOS EDUARDO DE MATTOS BICUDO ◽  
CARLOS WALLACE DO NASCIMENTO MOURA
Keyword(s):  
New Species ◽  
North Coast ◽  
Similar Species ◽  
Northeast Brazil ◽  
The North ◽  
Apical View ◽  
Relationship Of ◽  
The Relationship

Cosmarium bahianum sp. nov. is described from samples collected from a bromeliad tank (phytotelmata) in a “restinga” area located at Salvador, Bahia State, northeast Brazil. Cosmarium bahianum belongs to the group of placoderm desmids, and is mainly characterized by rather small, smooth-walled, but remarkably punctate cells that are elliptic to subtriangular in apical view, as well as by a globose to elliptical, smooth-walled zygospore. The new species was collected from Hohenbergia littoralis J.B.Smith, an endangered endemic bromeliad species from the Brazilian Restinga with distribution restricted to the north coast of Bahia. The relationship of C. bahianum with morphologically similar species is discussed.

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