scholarly journals Benthic Community zonation in a breakwater on the north coast of the state of Rio de Janeiro, Brazil

2009 ◽  
Vol 52 (3) ◽  
pp. 637-646 ◽  
Author(s):  
Bruno Pereira Masi ◽  
Isabela Maria Macedo ◽  
Ilana Rosental Zalmon
Keyword(s):  
Rio De Janeiro ◽  
Experimental Studies ◽  
Empty Space ◽  
North Coast ◽  
Small Scale ◽  
Rocky Shores ◽  
Bare Rock ◽  
The North ◽  
Upper Eulittoral ◽  
Janeiro State

The present study presents the vertical zonation pattern of the intertidal benthic organisms on granitic boulders in the Farol de São Tomé beach (22º02'S, 41º03'W), Rio de Janeiro State. Four sampling profiles using 20 x 20 cm quadrats through a photo quadrat technique revealed four horizontal bands: (1) Littoral Fringe characterized by empty space and Littorina; (2) Upper eulittoral mainly occupied by Chthamalus and bare rock; (3) Lower eulittoral characterized by Chthamalus, Phragmatopoma, Ulva and Centroceras; and (4) Sublittoral Fringe characterized by Ulva, Phragmatopoma and Hypnea. The high variability in the relative abundance of the dominant species among the profiles may be attributed to the high topographic irregularity, reflecting in different wave action intensity at the same height, and consequently favoring the establishment of different species. The frequent substrate alternation from granitic rock to Phragmatopoma sandy reefs might contribute to the small-scale spatial variability. The implantation of a breakwater on an area without natural rocky shores allowed the study of intertidal benthic communty zonation, and provide a baseline for the experimental studies.

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

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.

scholarly journals Geo-enviromental diagnoses of the são francisco de itabapoana city in the north of Rio de Janeiro state

2020 ◽  
Vol 6 (5) ◽  
pp. 26764-26775
Author(s):  
Graziele Arantes Reis ◽  
Iago Matheus Lopes Macêdo ◽  
Rodson de Abreu Marques
Keyword(s):  
Rio De Janeiro ◽  
The North ◽  
Janeiro State

scholarly journals Glomalin in soil aggregates under different forest and pasture systems in the North of Rio de Janeiro state, Brazil

2020 ◽  
Vol 8 ◽  
pp. 100088
Author(s):  
Alessandro Santos ◽  
Cristiane Figueira da Silva ◽  
Emanuela Forestieri Gama-Rodrigues ◽  
Antonio Carlos Gama-Rodrigues ◽  
Marcus Sales ◽  
...  
Keyword(s):  
Rio De Janeiro ◽  
Soil Aggregates ◽  
The North ◽  
Janeiro State

THE SOCIAL DYNAMICS AND ECONOMIC INTERACTIONS OF THE HOUSEHOLDS AT GRAMALOTE, A SMALL-SCALE RESIDENTIAL SETTLEMENT DURING THE SECOND MILLENNIUM BC ON THE NORTH COAST OF PERU

2018 ◽  
Vol 29 (3) ◽  
pp. 532-551 ◽  
Author(s):  
Gabriel Prieto
Keyword(s):  
Social Dynamics ◽  
Extended Family ◽  
Initial Period ◽  
North Coast ◽  
Small Scale ◽  
Economic Activities ◽  
Economic Productivity ◽  
The North ◽  
The Social ◽  
Economic Interactions

Excavations at the small-scale domestic settlement of Gramalote between 2010 and 2014 allowed the exploration of the social dynamics and economic interactions in the second millennium BC on the Peruvian North Coast. Detailed excavations and materials recovered during the intervention contribute a unique opportunity to explore domestic aspects of early settlements in the Andes. This study presents new data on the public sectors of Gramalote's settlement, house-to-house differences, and evidence that the extended family was a unit of economic productivity and collective action. This analysis assesses the degree of overlap, and lack thereof, in the economic activities of each house during the Initial Period (1500–1200 cal BC). A new model for social and economic interactions is proposed, with the aim of exploring alternative models from the bottom-up perspective for the emergence and consolidation of social complexity in the Central Andean Region.

ARRANJO POPULACIONAL PARA A VARIEDADE UENF-14 DE MILHO PIPOCA

2017 ◽  
Vol 16 (3) ◽  
pp. 401
Author(s):  
CÁSSIO VITORAZZI ◽  
ANTONIO TEIXEIRA AMARAL JÚNIOR ◽  
LILIAM SILVIA CANDIDO ◽  
ISMAEL LOURENÇO DE JESUS FREITAS ◽  
THIAGO RODRIGUES DA CONCEIÇÃO SILVA
Keyword(s):  
Zea Mays ◽  
Grain Yield ◽  
Rio De Janeiro ◽  
Zea Mays L ◽  
Block Design ◽  
Grain Production ◽  
Maize Population ◽  
The North ◽  
Randomized Complete Block Design ◽  
Janeiro State

 RESUMO - A adequação do arranjo populacional está entre as técnicas que podem maximizar a produtividade da cultura do milho. Daí a importância das pesquisas que buscam estudar o desempenho de cultivares de milho e milhos especiais, a fim de determinar o arranjo de plantas ideal. O objetivo deste trabalho foi avaliar o desempenho da variedade UENF-14, de milho pipoca, cultivada em diferentes arranjos populacionais, na safra e safrinha, para otimizar a recomendação fitotécnica para os produtores rurais do Norte Fluminense. Foram instalados dois experimentos em Campos dos Goytacazes-RJ. Um na safrinha 2011 utilizando a variedade UENF-14 e o híbrido experimental P2 x P9, e o outro na safra 2011-2012, com a variedade UENF-14 e o híbrido comercial IAC-112. O delineamento experimental, nos dois experimentos, foi o de blocos casualizados arranjados em parcelas subsubdivididas, em que as parcelas foram compostas pelos genótipos, as subparcelas constituídas pelos espaçamentos entre linhas de semeadura (0,45, 0,60 e 0,90 m) e as subsubparcelas compostas pelas densidades de plantas (60.000, 75.000 e 90.000 plantas ha-1). A UENF-14 apresentou desempenho superior aos híbridos, demonstrando seu potencial para cultivo na região Norte Fluminense. Houve aumento do rendimento de grãos com a diminuição do espaçamento entre linhas de plantio. Para a variedade UENF-14, a redução do espaçamento entre linhas de plantio foi vantajosa para a produção de grãos, independentemente da época de semeadura.Palavras-chave: Zea mays L., densidade de semeadura, espaçamento entre linhas, épocas de semeadura.  POPULATION ARRANGEMENT FOR THE VARIETY OF POPCORN UENF-14 ABSTRACT - The adequacy of the maize population arrangement is among the most important techniques for obtaining higher yields. Therefore, many researchers have been conducting an attempt to study the performance of corn and specialty corn. The objective was to evaluate the performance of the popcorn variety UENF-14 in different population arrangements, in the harvest season and off-season. Two experiments were carried out in Campos dos Goytacazes, North of Rio de Janeiro State, Brazil, in the off-season 2011, using the UENF-14 variety and the experimental hybrid P2 x P9, and in the season 2011-2012 using UENF-14 and the commercial hybrid IAC-112. The treatments were arranged in randomized complete block design with split plots, in which plots were composed by popcorn genotypes, the subplots consisting of three spacings between sowing lines (0.45, 0.60 and 0.90 m) and the subsubplots composed of three plants per hectare densities (60,000, 75,000 and 90,000 plants.ha-1). The variety UENF-14 presented higher performance than the hybrids, demonstrating its potential for recommendation to the North of Rio de Janeiro State. There was an increase of grain yield by reducing the spacing between the plants rows. The cultivation of the variety UENF-14 reducing the spacing between rows was advantageous for grain production, regardless of planting date.Keywords: Zea mays L., densities of plants, spacing between rows, sowing times.

scholarly journals KARAKTERISTIK PERIKANAN TERI (ENGRAULIDAE) DI PANTAI UTARA JAWA-MADURA

2021 ◽  
Vol 26 (3) ◽  
pp. 135
Author(s):  
ACHMAD ZAMRONI ◽  
Heri Widiyastuti ◽  
Suwarso Suwarso
Keyword(s):  
North Coast ◽  
Small Scale ◽  
Fishing Gear ◽  
Eastern Region ◽  
Northern Coast ◽  
Catch Per Unit Effort ◽  
Fishing Season ◽  
The North ◽  
Fishing Vessels ◽  
Landing Sites

Perikanan teri berkembang sangat pesat khususnya di perairan utara Jawa Madura pada tahun terakhir ini. Kajian tentang karakteristik perikanan teri (Engraulidae) di sepanjang pantai utara Jawa-Madura dilaksanakan pada tahun 2017-2018, meliputi sebaran usaha perikanan, tipe armada-alat penangkapan ikan, aspek operasional penangkapan, hasil tangkapan-kelimpahan dan musim penangkapan ikan teri. Pengumpulan data pendaratan ikan teri dilakukan melalui survey di 11 lokasi pendaratan ikan. Hasil penelitian menunjukkan terdapat 12 lokasi tempat pendaratan utama ikan teri di sepanjang pantai utara (pantura) Jawa dan Madura. Dua jenis alat dominan digunakan untuk penangkapan teri adalah pukat cincin dan payang; perikanan bersifat skala kecil, melakukan trip harian, dengan armada kapal penangkap berukuran dibawah 20 GT. Jaring umumnya menggunakan waring dengan mata jaring kecil (3/8 inch) di bagian kantong. Daerah penangkapan di perairan pantai yang dangkal, dekat dengan basis perikanan. Musim penangkapan ikan teri bervariasi, di wilayah bagian barat (Pulolampes, Larangan, Morodemak) berlangsung sekitar musim timur/tenggara (Mei Juli), sedangkan di wilayah bagian timur berlangsung pada awal musim timur dan berjalan cukup lama hingga bulan November (musim peralihan 2). Hasil tangkapan per unit upaya (CPUE, sebagai indek kelimpahan) diduga makin ke arah timur semakin rendah namun disertai musim penangkapan ikan lebih lama. Anchovy fishery has grown rapidly, especially in the northern waters of Java-Madura in the last year. The study on the characteristics of the anchovy fishery (Engraulidae) along the northern coast of Java-Madura was carried out in 2017-2018, covering the distribution of fisheries effort, types of fishing gear, operational aspects of fishing, catch-abundance and fishing season. The collection of anchovy landing data was carried out through a survey at 11 fish landing sites. The results showed that there were 12 main anchovy landing sites along the north coast (pantura) of Java and Madura. Two types of dominant fishing gear used for anchovies are purse seine and payang; Fisheries are small-scale, undertaking daily trips, with a fleet of fishing vessels under 20 GT. The nets generally use “waring” with small mesh (3/8 inch) in the codend. Fishing area in shallow coastal waters, close to the fishing base. The fishing season for anchovy varies, in the western region (Pulolampes, Larangan, Morodemak) it takes place around the east / southeast season (May-July), while in the eastern region it takes place at the beginning of the eastern season and lasts quite a long time until November (transition season 2) . The catch per unit effort (CPUE, as an abundance index) is thought to be getting lower eastward but accompanied by a longer fishing season.

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

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