scholarly journals Fishing activity in Northern Rio de Janeiro State (Brazil) and its relation with small cetaceans

1998 ◽  
Vol 41 (3) ◽  
pp. 296-302 ◽  
Author(s):  
Ana Paula Madeira Di Beneditto ◽  
Renata Maria Arruda Ramos ◽  
Neuza Rejane Wille Lima
Keyword(s):  
Cold Storage ◽  
Rio De Janeiro ◽  
Carcharhinus Plumbeus ◽  
Fishing Activity ◽  
Preferred Habitat ◽  
Fishing Resources ◽  
Micropogonias Furnieri ◽  
Pontoporia Blainvillei ◽  
The Relationship ◽  
Janeiro State

Research on fishing activity at Atafona village, in Northern Rio de Janeiro, Brazil (21°35'S), was carried out between 1987-96 for the purpose of relating it to the accidental capture of small cetaceans and of estimating the relationship between fishing activity and the diet of small cetaceans. Data on fishing operations were obtained at the cold storage plants management, from interviews with fishermen and personal observations. The most representative fishing resources were Xyphopenaeus kroyeri, Micropogonias furnieri, Carcharhinus plumbeus, C. acronotus,and Rhizoprionodon porosus. Gillnets are responsible for the accidental capture of small cetaceans in the region, mainly Pontoporia blainvillei and Sotalia fluviatilis (marine form). Four types of gillnets that are used on the region ("minjuada", "sarda", "caçoá" and "pescadinha") were dangerous to these species because they are placed in their preferred habitat. There is no competition between fishermen and small cetaceans due to the selection in the capture of commercialized fishes

scholarly journals Trophic niche comparison between two predators in northern Rio de Janeiro State, Brazil: a stable isotopes approach

2013 ◽  
Vol 13 (3) ◽  
pp. 29-33 ◽  
Author(s):  
Ana Paula Madeira Di Beneditto ◽  
Carlos Eduardo Rezende ◽  
Plínio Barbosa Camargo ◽  
Helena Amaral Kehrig
Keyword(s):  
Food Chain ◽  
Rio De Janeiro ◽  
Trophic Position ◽  
Food Resources ◽  
Trophic Niche ◽  
Eastern Brazil ◽  
Trichiurus Lepturus ◽  
Δ15n And Δ13c ◽  
Pontoporia Blainvillei ◽  
Janeiro State

The trophic niche of the sympatric predators Pontoporia blainvillei(franciscana dolphin) and Trichiurus lepturus (ribbonfish) was compared by stable isotope (δ15N and δ13C) ratios in hepatic and muscular tissues to understand how they co-exist in the northern Rio de Janeiro State (21°30′S-22°15′S), south-eastern Brazil. Dolphin specimens were incidentally captured through commercial gillnet fisheries, while fish specimens were the target of these fisheries. The predators had similar δ15N values in the liver (P. blainvillei: 14.6 ± 1.0‰; T. lepturus: 14.4 ± 0.6‰), which indicates similar trophic position in the recent food intake. However,P. blainvillei showed lighter δ15N values in muscle (13.8 ± 1.0‰) than T. lepturus (15.0 ± 0.4‰), revealing differences in the long term diet that could be related with the prey size ingested. The δ13C signatures showed a preferential inshore and benthic food chain for P. blainvillei (liver: −15.2 ± 0.6‰; muscle: −16.0 ± 0.5‰) and a more offshore and pelagic food chain for T. lepturus(liver: −17.2 ± 0.6‰; muscle: −16.8 ± 0.3‰). The isotopic variances of liver and muscle revealed a broader niche width to P. blainvillei in relation to T. lepturus, with a greater use of available food resources in coastal waters. In the area of study, the differences in habitat use and exploitation of food resources are favoring the predators' coexistence.

Heavy metal distribution in two cetacean species from Rio de Janeiro State, south-eastern Brazil

2008 ◽  
Vol 88 (6) ◽  
pp. 1117-1120 ◽  
Author(s):  
Carlos Eduardo Veiga de Carvalho ◽  
Ana Paula M. Di Beneditto ◽  
Cristina Maria M. Souza ◽  
Renata M.A. Ramos ◽  
Carlos Eduardo Rezende
Keyword(s):  
Rio De Janeiro ◽  
Marine Mammals ◽  
Cetacean Species ◽  
South Eastern ◽  
Eastern Brazil ◽  
The Difference ◽  
Contamination Levels ◽  
Positive Correlations ◽  
Pontoporia Blainvillei ◽  
Janeiro State

Mercury (Hg), cadmium (Cd) and zinc (Zn) concentration were analysed in muscular and liver tissues of two cetacean species, franciscana Pontoporia blainvillei and boto-cinza Sotalia guianensis, in order to compare their contamination levels in northern Rio de Janeiro State, south-eastern Brazil. The cutlassfish, Trichiurus lepturus, which is the preferential prey of the boto-cinza, have also been analysed. Liver tissue always presented higher concentrations when compared with muscle samples for all the studied metals. The boto-cinza showed higher concentrations for all metals in both tissues than in the franciscana, and the only exception was Cd. This result is probably related to the difference in size prey preference of each cetacean. Mercury was the only element that presented significant positive correlations with body length and age in both cetacean species. The cutlassfish showed rising Hg concentrations with weight and total length, suggesting a possible mercury pathway for marine mammals' contamination.

scholarly journals Ethnozoology Mediating Knowledge About Sea Turtles and Environmental Education Strategies in the North-Central Coast of Rio De Janeiro, Brazil

2021 ◽  
Vol 14 ◽  
pp. 194008292110232
Author(s):  
Raísa da Silva Costa Rêgo ◽  
Caio Henrique Gonçalves Cutrim ◽  
Amanda Soares Miranda ◽  
Juliana Loureiro Almeida Campos ◽  
Vinícius Albano Araújo
Keyword(s):  
Rio De Janeiro ◽  
Sea Turtles ◽  
Biological Knowledge ◽  
Central Coast ◽  
North Central ◽  
Effective Strategies ◽  
The North ◽  
The Relationship ◽  
Janeiro State

Natural environment has undergone rapid transformations, primarily attributed to human actions that threaten ecosystems' balance. Understanding the relationship between humans and nature is essential to generate effective strategies for sustainably using resources. In this study, we analyzed the environmental perception and knowledge about the biology of sea turtles through 120 informal interviews with visitors at beaches on the north-central coast of Rio de Janeiro state. Residents noticed garbage more often than tourists, as did women and younger individuals. The perception of initiatives necessary to increase the preservation of the beaches was higher for people with higher education. In general, there were no differences in biological knowledge about sea turtles between residents, tourists and people who work or study at the cities. The results point to the need for oceanic education strategies that can help raise environmental awareness through long-term conservation programs.

scholarly journals Fishing strategies among prehistoric populations at Saquarema Lagoonal Complex, Rio de Janeiro, Brazil

2013 ◽  
Vol 85 (1) ◽  
pp. 415-429 ◽  
Author(s):  
Márica B Guimarães
Keyword(s):  
Sea Level ◽  
Rio De Janeiro ◽  
Late Holocene ◽  
Relative Sea Level ◽  
Fish Resources ◽  
Brazilian State ◽  
Fishing Strategies ◽  
Fishing Resources ◽  
Micropogonias Furnieri

Two distinct fishing technologies were identified among the shellmound builders of the Saquarema Lagoonal Complex, in the Brazilian state of Rio de Janeiro: bone point technology and worked fish spines. These technologies were related to the acquisition of specific fish resources; Worked fish spines were used in the capture of Micropogonias furnieri (Desmarest), and bone points used for fishing specimens of the Ariidae family. Worked spines technology was predominant between 6,726 cal. years BP and 3,699 cal. years BP, while the bone point technology was dominant after 3,699 cal. years BP. It is believed these different strategies for obtaining fishing resources before 3,699 years cal. BP was related to environmental. Notably the gradual regression of relative sea level occurred during the mid- and late Holocene.

scholarly journals Relationship between dental morphology, sex, body length and age in Pontoporia blainvillei and Sotalia fluviatilis (Cetacea) in Northern Rio de Janeiro, Brazil

2000 ◽  
Vol 60 (2) ◽  
pp. 283-290 ◽  
Author(s):  
R. M. A. RAMOS ◽  
A. P. M. DI BENEDITTO ◽  
N. R. W. LIMA
Keyword(s):  
Body Size ◽  
Body Length ◽  
Rio De Janeiro ◽  
Linear Growth ◽  
Root Diameter ◽  
Dental Morphology ◽  
Maximum Width ◽  
Relative Age ◽  
Pontoporia Blainvillei ◽  
The Relationship

The relationship between dental morphology, sex, body length and age of small cetaceans can be used to determine ontogeny, sexual dimorphism and geographical variation. The objective of this study was to determine the relationship between dental morphology, sex, body size and age. A total of 91 specimens of P. blainvillei and 80 specimens of S. fluviatilis accidentally captured in fisheries or stranded in northern Rio de Janeiro (21º37'-22º25'S), from September 1988 to November 1996 were analysed. The teeth root diameter in P. blainvillei was significantly different between the sex; the values for females were larger than males. In neither species aid we observed significant in variations dimension and number of teeth, thickness of dentine and cemental layers and in the maximum width of cement as a function of body size. Age was related to increases in tooth length, root and cingulum diameters, and maximum width of cement in individuals of P. blainvillei, and tooth and crown lengths and maximum width of cement in individuals of S. fluviatilis. The observation of a linear growth between maximum width of cement and age in both species indicates that the equations obtained can be used to estimate relative age in P. blainvillei and S. fluviatilis in northern of Rio de Janeiro.

Reflexões acerca do marxismo “herético” de Ernst Bloch

2019 ◽  
Vol 11 (3) ◽  
pp. 139-155
Author(s):  
Marta Maria Aragão Maciel
Keyword(s):  
Rio De Janeiro ◽  
Sao Paulo ◽  
São Paulo ◽  
Porto Alegre ◽  
Ernst Bloch ◽  
Ernest Bloch ◽  
Radical Critique ◽  
Enrique Dussel ◽  
Principal Work ◽  
The Relationship

Resumo: O presente texto objetiva uma abordagem, no interior do pensamento de Ernst Bloch (1885/1977), acerca da relação entre marxismo e utopia: um vínculo incomum no interior do marxismo, comumente tido numa oposição inconciliável. Daí a apropriação do termo “herético” em referência ao marxismo do autor alemão: a expressão é usada não em sentido pejorativo, mas apenas para situar seu distanciamento do marxismo vulgar, bem como sua intenção de crítica radical dessa tradição. Aqui entendemos que é, em particular, por meio da relação entre marxismo e utopia que o pensamento de Ernst Bloch aparece como um projeto inelutavelmente político com vistas a uma filosofia da práxis concreta na principal obra do autor: O Princípio esperança (Das Prinzip Hoffnung) [1954/1959]. Neste livro encontramos, com efeito, a tentativa de pensar a atualidade do marxismo para o contexto do século XX, a era das catástrofes, conforme definição do historiador Eric Hobsbawm. Palavras-chave: Marxismo. Utopia. Dialética. Crítica social. Cultura.  Abstract: This paper presents an approach within the thinking of Ernst Bloch (1885/1977) about the relation between Marxism and Utopia: an unusual link within Marxism, commonly held in an irreconcilable opposition. Hence the appropriation of the term "heretical" in reference to the German author's Marxism: the expression is used not in a pejorative sense, but only to situate its distancing from vulgar Marxism, as well as its intention of a radical critique of this tradition. Here we understand that it is particularly through the relationship between Marxism and Utopia that Ernst Bloch's thought appears as an ineluctably political project with a view to a philosophy of concrete praxis in the principal work of the author: The Principle Hope (Das Prinzip Hoffnung) [1954/1959]. In this book we find, in effect, the attempt to think the actuality of Marxism in the context of the age of catastrophe - as defined by Eric Hobsbawm - that is, the long twentieth century that experienced the extreme barbarism of the concentration camp, of which the thinker in question, Jewish and Communist, managed to escape.  Keywords: Marxism. Utopia. Dialectics. Social criticismo. Culture. REFERÊNCIAS   ALBORNOZ, Suzana. O enigma da Esperança: Ernst Bloch e as margens da história do espírito. Petrópolis, RJ: Vozes, 1995.   ALBORNOZ, Suzana. Ética e utopia: ensaio sobre Ernst Bloch. 2ª edição. Porto Alegre: Movimento; Santa Cruz do Sul: EdUSC, 2006.  BICCA, Luiz. Marxismo e liberdade. São Paulo: Loyola, 1987.  BLOCH, Ernst. Filosofia del Rinascimento. Trad. it. de Gabriella Bonacchi e Katia Tannenbaum. Bologna: il Mulino, 1981.     BLOCH, Ernst. Héritage de ce temps. Trad. Jean Lacoste. Paris: Payot, 1978.  BLOCH, Ernst. O Princípio Esperança [1954-1959]. Vol. I.  Trad. br. Nélio Schneider. Rio de Janeiro: EdUERJ; Contraponto, 2005.   BLOCH, Ernst. O Princípio Esperança [1954-1959]. Vol. II. Trad. br. Werner Fuchs. Rio de Janeiro: EdUERJ; Contraponto, 2006.   BLOCH, Ernst. O Princípio Esperança [1954-1959]. Vol. III. Trad. br. Nélio Schneider. Rio de Janeiro: EdUERJ; Contraponto, 2006.  BLOCH, Ernst. Du rêve à l’utopie: Entretiens philosophiques. Textos escolhidos e prefaciados por Arno Münster. Paris: Hermann, 2016.  BLOCH, Ernst. Thomas Münzer, Teólogo da Revolução [1963]. Trad. br. Vamireh Chacon e Celeste Aída Galeão. Rio de Janeiro: Tempo Brasileiro, 1973.  BLOCH, Ernst. L’esprit de l’utopie, [1918-1023]. Trad. fr. de Anne Marie Lang e Catherine Tiron-Audard. Paris: Gallimard, 1977.  BLOCH, Ernst. El pensamiento de Hegel. Trad. esp. de Wenceslao Roces. Mexico; Buenos Aires: Fondo de Cultura Economica, 1963.   BOURETZ, Pierre. Testemunhas do futuro: filosofia e messianismo. Trad. J. Guinsburg. São Paulo: Perspectiva, 2011, p. 690.  FREUD, Sigmund. Los sueños [1900-1901]. Trad. Luis Lopez-Ballesteros et al., Madrid: Biblioteca Nueva, 1981.  FREUD, Sigmund. A Interpretação dos sonhos. Vol. I. Trad. Jayme Salomão. Rio de Janeiro: Imago, 2006.  HORKHEIMER, Max. Filosofia e teoria crítica. In: Textos escolhidos. Trad. de José Lino Grünnewald. São Paulo: Abril Cultural, 1980, p. 155 (Coleção Os Pensadores.). MÜNSTER, Arno. Ernst Bloch: filosofia da práxis e utopia concreta. São Paulo: UNESP, 1993.     MÜNSTER, Arno. Utopia, Messianismo e Apocalipse nas primeiras de Ernst Bloch. Trad. br. de Flávio Beno Siebeneichler. São Paulo: UNESP, 1997.  PIRON-AUDARD, Catherine. Anthropologie marxiste et psychanalyse selon Ernst Bloch. In: RAULET, Gérard (org.). Utopie-marxisme selon Ernst Bloch: un système de l'inconstructible. Payot: Paris, 1976. VIEIRA, Antonio Rufino. Princípio esperança e a “herança intacta do marxismo” em Ernst Bloch. In: Anais do 5° Coloquio Internacional Marx-Engels. Campinas: CEMARX/Unicamp. Disponível em: <www.unicamp.br / cemarx_v_coloquio_arquivos_arquivos /comunicacoes/gt1/sessao6/Antonio_Rufi no.pdf>.  VIEIRA, Antonio Rufino. Marxismo e libertação: estudos sobre Ernst Bloch e Enrique Dussel. São Leopoldo: Nova Harmonia, 2010.  RAULET, Gérard (Organizador). Utopie - marxisme selon Ernst Bloch: un sistème de l’inconstructible. Paris: Payot, 1976.  ZECCHI, Stefano. Ernest Bloch: Utopia y Esperanza en el Comunismo [1974]. Trad. esp. de Enric Pérez Nadal, Barcellona: Península, 1978.  

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