Small-Scale Submerged Breakwater Testing to Protect a Rio De Janeiro Beach

2021 ◽  
Author(s):  
Guilherme Amado Machado ◽  
Jean Marcel Faria Novo ◽  
Celso Romanel
Keyword(s):  
Rio De Janeiro ◽  
Small Scale ◽  
Submerged Breakwater

scholarly journals The spatial distribution of Aedes aegypti and Aedes albopictus in a transition zone, Rio de Janeiro, Brazil

2009 ◽  
Vol 25 (6) ◽  
pp. 1203-1214 ◽  
Author(s):  
Nildimar Alves Honório ◽  
Márcia Gonçalves Castro ◽  
Fábio Saito Monteiro de Barros ◽  
Mônica de Avelar Figueiredo Mafra Magalhães ◽  
Paulo Chagastelles Sabroza
Keyword(s):  
Aedes Aegypti ◽  
Transition Zone ◽  
Rio De Janeiro ◽  
Urban Forest ◽  
Viral Disease ◽  
Vegetation Coverage ◽  
Small Scale ◽  
Wet Season ◽  
Forested Areas ◽  
Vector Borne

Dengue fever has become the most important vector-borne viral disease in Brazil. Human facilitated transport of desiccation-resistant eggs has led to its two most important vectors, Aedes aegypti and Ae. albopictus, becoming widespread. In this paper, we report seasonal and spatial variation in larval abundances of Ae. aegypti and Ae. albopictus across a small-scale transition zone between an urban area and an urban wooded/forested area within Rio de Janeiro, Brazil. We installed 400 ovitraps across 10 sites with different human population densities and vegetation coverage. Eggs and larvae were collected for three weeks during the wet and dry seasons of 2002 and 2003. Ae. albopictus was predominantly found in the forested areas of the study site whereas in the urbanized area Ae. aegypti was more abundant. Both species peaked during the wet season. This distribution pattern, which may reflect adult flight range, may favor the co-occurrence of larvae of these species in a small-scale urban/urban forest transition zone.

scholarly journals Aspectos etnoecológicos e implicações para a conservação de Tursiops truncatus (Cetartiodactyla: Delphinidae) no Arquipélago das Cagarras, Rio de Janeiro, Brasil

2013 ◽  
Vol 13 ◽  
Author(s):  
Liliane Lodi ◽  
Camilah Antunes Zappes ◽  
Álvaro Samuel Guimarães dos Santos
Keyword(s):  
Tursiops Truncatus ◽  
Rio De Janeiro ◽  
Anthropogenic Impacts ◽  
Participant Observation ◽  
Bottlenose Dolphins ◽  
Morphological Characteristics ◽  
Small Scale ◽  
Common Bottlenose Dolphin ◽  
Significant Difference ◽  
The Common

The objectives of this study were to understand the ecological aspects of the common bottlenose dolphin (Tursiops truncatus) in the Cagarras Archipelago, Rio de Janeiro, Brazil, and possible anthropogenic impacts by comparing the knowledge of local small-scale fishermen (GA) and the regulars in the archipelago (GB). The data obtained were compared with those available in the literature to propose strategies for monitoring and preservation. Between August and December 2010, we applied the methods of participant observation, interviews-questionnaires and use of illustrative posters. Sixty-one interviews were conducted, from which 83.6% were selected by considering correct answers about the identification of the species on posters (morphological characteristics) and description of time of occurrence in the archipelago (July to December) as reported for the species in the literature. Regarding the seven questions analyzed statistically, a significant difference was found between the accounts of the two groups with respect to anthropic threats to T. truncatus. Gill-nets and the decrease of fishing resources were the main causes identified by the GA group whereas the GB group pointed to the disorganized use of space, pollution and predatory fishing as the factors that have threatened the common bottlenose dolphins. The use of ethnobiological data in conservation programs brings opportunities for the collaboration and participation of the community that is directly inserted into the ecosystem as well as a chance for locals to get involved in issues concerning the sustainability of the archipelago.

scholarly journals Integrating science and citizen science: the dusky grouper (Epinephelus marginatus) sustainable fishery of Copacabana, Rio de Janeiro, Brazil

2019 ◽  
Author(s):  
Alpina Begossi ◽  
Svetlana V. Salivonchyk
Keyword(s):  
Citizen Science ◽  
Rio De Janeiro ◽  
Local Ecological Knowledge ◽  
Management Training ◽  
Small Scale ◽  
Ecological Knowledge ◽  
Small Scale Fisheries ◽  
Significant Difference ◽  
Dusky Grouper ◽  
Sustainable Fishery

AbstractWe followed landings of dusky grouper, Epinephelus marginatus, from 2013 to 2019. We observed 1,896 individuals of dusky grouper, Epinephelus marginatus, in Copacabana, Rio de Janeiro, from September 2013 to February 2019. The total weight of the catches was 6,065.57 kg, with an average of 1,442.50 kg/year and a std of 147.30 kg.We integrated fishers in our study through citizen science (CS): individuals were trained to monitor grouper gonads and supplied information on fishing spots and prices. After comparing catch curves (based on weight) and curve prices (in the Brazilian monetary currency of reals), our results showed that catches in the Copacabana fishery have been stable (the results of the Kruskal-Wallis test showed no significant difference for either the weight of the catches or the average prices of dusky groupers in the years compared). Copacabana has been a sustainable fishery when considering its catches of dusky grouper. This is a very important result for conservation and management, considering the importance of small-scale fisheries in terms of their low fishing efforts and their possible effects on vulnerable species, as well as their ecological and economic importance in developing countries. Citizen science, alomng with local ecological knowledge, helps integrate research and fisheries as well as researchers and fishers and allows for larger sampling efforts and management training for fishers.

scholarly journals Lógica politécnica versus fisiocracia agreste: conflitos em torno da gestão ambiental num ecossistema no litoral fluminense

2006 ◽  
Vol 8 (1) ◽  
pp. 9
Author(s):  
Marco Antonio Da Silva Mello ◽  
Arno Vogel
Keyword(s):  
Rio De Janeiro ◽  
Small Scale ◽  
Regional Environment ◽  
Sand Bars ◽  
The Social ◽  
Urban Engineering ◽  
Xix Century ◽  
Relationship Of ◽  
The Relationship ◽  
The City

Este artigo busca descrever e analisar a atividade da pesca artesanal no município de Maricá (RJ), para chegar, finalmente, à discussão dos impactos socioambientais da expansão da Região Metropolitana do Rio de Janeiro sobre suas lagunas e restingas. O registro da evolução histórica da paisagem de Maricá, a partir da literatura dos viajantes – naturalistas e geógrafos–, desde o século XIX, constitui, juntamente com uma ampla discussão da natureza, dinâmica e perspectivas dos ambientes lacustres fluminenses, o cerne da proposta para uma etnografia de seu manejo, pelas comunidades de pescadores e pela engenharia sanitária e urbana, com suas distintas, conflitantes e concorrentes concepções dos mecanismos de seu funcionamento (estagnação versus circulação); nesse caso, analisa-se a relação do conjunto de lagunas como mar, ou seja, a questão das barras oceânicas permanentes versus barras oceânicas sazonais. Palavras-chave: comunidades pesqueiras; pesca lacustre; manejo de ecossistemas lacustres. Abstract: The article describes and analyzes small-scale non-industrial fishing in the city of Maricá. The final aim of this study is to discuss the social and environmental impact of Greater Metropolitan Rio de Janeiro on the Maricá region’s lagoons and saltmarshes. Registering the historical evolution of Maricá’s landscape, using literature written by traveling naturalists and geographers since the XIX Century, constitutes, together with an ample discussion of the nature, dynamics and perspectives of Fluminense lagoon environments, the core proposal of this ethnographical research is how a regional environment is handled by fishermen as well as sanitary and urban engineering with its distinct, conflicting and competing conceptions of operational mechanics (stagnation versus circulation) in this case, specifically, the relationship of the group of lagoons to the sea is analyzed, i.e., the problem of permanent oceanic bars versus seasonal sand bars. Keywords: fishing communities; lagoon fishery; lacustrine ecosystems handling.

Feeding habits of the sea turtles Caretta caretta and Lepidochelys olivacea in south-eastern Brazil

2015 ◽  
Vol 8 ◽  
Author(s):  
Ana Paula Madeira Di Beneditto ◽  
Jailson Fulgencio De Moura ◽  
Salvatore Siciliano
Keyword(s):  
Rio De Janeiro ◽  
Feeding Habits ◽  
Sea Turtles ◽  
Stomach Contents ◽  
Caretta Caretta ◽  
Small Scale ◽  
Lepidochelys Olivacea ◽  
South Eastern ◽  
Eastern Brazil ◽  
Janeiro State

Studies of the feeding habits of sea turtles are important in identifying their feeding grounds and preferred prey, thus helping with management decisions regarding habitat protection. The present study describes, for the first time, the feeding habits of the sea turtlesCaretta carettaandLepidochelys olivaceain Rio de Janeiro State, south-eastern Brazil (22°06′S–22°55′S). The stomach contents of fiveC. carettaand fiveL. olivacearecovered between 2009 and 2010 were analysed to identify the prey species. A common feeding pattern was noted for both species, with bottom-dwelling prey (fish, crustaceans, molluscs and echinoderms), common in shallow environments, constituting the main food items. All fish and brachyuran crustacean species identified in the stomach contents were by-catch in small-scale shrimp fisheries that operate along the study area. The coastal waters of Rio de Janeiro State represent a new feeding ground forL. olivacea, expanding its preferential habitat during the non-reproductive period. The results provide strong evidence for the likelihood that sea turtles are interacting with fisheries due to an overlapping between feeding and fishery grounds. An evaluation of carcasses washed up on beaches is needed for a better understanding of the effects on the population dynamics of sea turtles.

scholarly journals Fishers and groupers (Epinephelus marginatus and E. morio) in the coast of Brazil: integrating information for conservation

2019 ◽  
Vol 15 (1) ◽  
Author(s):  
Alpina Begossi ◽  
Svetlana Salyvonchyk ◽  
Branko Glamuzina ◽  
Shirley Pacheco de Souza ◽  
Priscila F. M. Lopes ◽  
...  
Keyword(s):  
Local Knowledge ◽  
Rio De Janeiro ◽  
Local Ecological Knowledge ◽  
Sao Paulo ◽  
Northeastern Brazil ◽  
Small Scale ◽  
Ecological Knowledge ◽  
São Paulo ◽  
Red Grouper ◽  
Dusky Grouper

Abstract Background Groupers are a vulnerable but economically important group of fish, especially for small-scale fisheries. We investigated catches and local ecological knowledge (LEK) of diet, habitat, and past fishing experiences. Methods Landings, prices, interviews, and restaurants demand for two species, Epinephelus marginatus (dusky grouper) and Epinephelus morio (red grouper), were registered. Results We visited 74 markets and 79 sites on the coast of Brazil in 2017–2018, and we interviewed 71 fishers: Bahia (NE), Rio de Janeiro and São Paulo (SE), and Santa Catarina (S). The landings sampled of dusky grouper (2016–2017) in Rio de Janeiro were: n = 222, size 38–109 cm, weight 1–24 kg, average 3.84 kg; in São Paulo, São Sebastião were: n = 47, size 39–106 cm, weight 2–8 kg, average of 2.77 kg; and at Santos: n = 80, 26–120 cm, weight 0.36–15 kg, average 2.72 kg. Red grouper was observed in markets in the northeastern Brazil. We did not observe Epinephelus marginatus from Bahia northward; a maximum size of 200 cm was reported south of the Bahia, besides Rio de Janeiro and São Paulo coasts, 20 years ago (or longer) by 12 fishers. Local knowledge of fishers was important for grouper data of habitat and diet; the reproduction period was identified by fishers as September to March. Conclusions Groupers can be considered as a cultural and ecological keystone species. We suggest protective measures: 1) fishing zoning, 2) islands (MPAs) with the surveillance of fishers, 3) late Spring and early Summer as key periods for management (grouper reproduction), 4) studies on grouper larvae, 5) mapping of fishing spots, 6) studies on local knowledge. Collaboration with small-scale fishers and local knowledge could contribute to low-conflict management measures. In that regard, integrative models of management from Latin America, by using local knowledge and citizen science, could produce successful grouper management for Brazilian data-poor fisheries, a contrasting reality to the Mediterranean areas. Finally, the distribution of E. marginatus in Brazil leave us with questions: a) Have dusky groupers disappeared from Bahia because of a decline in the population? b) Was it uncommon in Northeast Brazil? c) Did changes in water temperatures forced a movement southward?

scholarly journals Spatial Diagnosis of Rain Gauges’ Distribution and Flood Impacts: Case Study in Itaperuna, Rio de Janeiro—Brazil

Water ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 1120 ◽  
Author(s):  
Priscila Celebrini de Oliveira Campos ◽  
Igor Paz
Keyword(s):  
Fractal Dimension ◽  
Rio De Janeiro ◽  
Rainfall Variability ◽  
Probability Of Detection ◽  
Extreme Weather Events ◽  
Small Scale ◽  
Essential Information ◽  
Rain Gauges ◽  
Flood Susceptibility ◽  
Susceptibility Maps

The global increase of urban areas highlights the need to improve their adaptation to extreme weather events, in particular heavy rainfall. This study analyzes the impacts of in-situ rain gauges’ distribution (by applying the fractal dimension concept) associated with a spatial diagnosis of flood occurrences in the municipality of Itaperuna, Rio de Janeiro–Brazil, performing an investigation of flood susceptibility maps based on transitory (considering precipitation) and on permanent factors (natural flood susceptibility). The fractal analysis results pointed out that the rain gauges’ distribution presented a scaling break behavior with a low fractal dimension ( 0.416 ) at the small-scale range, highlighting the incapacity of the local instrumentation to capture the spatial rainfall variability. Thereafter, the cross-tabulation method was used to validate both predictive maps with recorded data of the major January 2020 event, which indicated that the transitory factors’ flood map presented an unsatisfactory Probability of Detection of floods ( P O D = 0.552 ) when compared to the permanent factors’ map ( P O D = 0.944 ) . These issues allowed to consider the hydrological uncertainties associated with the sparse gauge network distribution and its impacts on the use of flood susceptibility maps. Such methodology enables the evaluation of other municipalities and regions, constituting essential information in aid of territorial management.

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.

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