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  • 1
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    A better way forward for Brazil's fisheries (2015)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2015-03-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Di Dario, Fabio -- Alves, Carlos B M -- Boos, Harry -- Fredou, Flavia L -- Lessa, Rosangela P T -- Mincarone, Michael M -- Pinheiro, Marcelo A A -- Polaz, Carla N M -- Reis, Roberto E -- Rocha, Luiz A -- Santana, Francisco M -- Santos, Roberta A -- Santos, Sonia B -- Vianna, Marcelo -- Vieira, Fabio -- New York, N.Y. -- Science. 2015 Mar 6;347(6226):1079. doi: 10.1126/science.347.6226.1079-a.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Nucleo em Ecologia e Desenvolvimento Socioambiental de Macae, Universidade Federal do Rio de Janeiro, 27910-970, Macae, RJ, Brazil. didario@macae.ufrj.br. ; Projeto Manuelzao, Universidade Federal de Minas Gerais, 31270-901, Belo Horizonte, MG, Brazil. ; Centro de Pesquisa e Conservacao da Biodiversidade Marinha do Sudeste e Sul, Instituto Chico Mendes de Conservacao da Biodiversidade, 88301-700, Itajai, SC, Brazil. ; Departamento de Pesca e Aquicultura, Universidade Federal Rural de Pernambuco, 52171-900, Recife, PE, Brazil. ; Nucleo em Ecologia e Desenvolvimento Socioambiental de Macae, Universidade Federal do Rio de Janeiro, 27910-970, Macae, RJ, Brazil. ; UNESP, Campus Experimental do Litoral Paulista (CLP), Group of Studies on Crustacean Biology (CRUSTA), 11330-900 Sao Vicente, SP, Brazil. ; Centro Nacional de Pesquisa e Conservacao de Peixes Continentais, Instituto Chico Mendes de Conservacao da Biodiversidade, 13630-000, Pirassununga, SP, Brazil. ; PUCRS, Faculdade de Biociencias, Laboratory of Vertebrate Systematics, 90619-900, Porto Alegre, RS, Brazil. ; Institute of Biodiversity Science and Sustainability, California Academy of Sciences, San Francisco, CA 94118, USA. ; Unidade Academica de Serra Talhada, Universidade Federal Rural de Pernambuco, 56903-970, Serra Talhada, PE, Brazil. ; Departamento de Zoologia, Universidade do Estado do Rio de Janeiro, 20550-900, Rio de Janeiro, RJ, Brazil. ; Instituto de Biologia, Universidade Federal do Rio de Janeiro, CCS, bl. A. 21941-617, Rio de Janeiro, RJ, Brazil. ; Centro de Transposicao de Peixes/Colecao de Peixes, Universidade Federal de Minas Gerais, 31270-901, Belo Horizonte, MG, Brazil.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25745153" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Aquatic Organisms ; Brazil ; *Conservation of Natural Resources ; *Extinction, Biological ; *Fisheries
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
    Electronic Resource
    Electronic Resource
    Mobility, genetic markers, susceptibility to malaria and race mixture in Manaus, Brazil
    Amsterdam : Elsevier
    Journal of Human Evolution 12 (1983), S. 373-381 
    Details
    ISSN: 0047-2484
    Keywords: Brazil ; albumin rare variant ; migration patterns ; race mixture, malaria
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0047-2484(83)80165-1
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  • 3
    Electronic Resource
    Electronic Resource
    Mobility, genetic markers, susceptibility to malaria and race mixture in Manaus, Brazil
    Amsterdam : Elsevier
    Journal of Human Evolution 12 (1983), S. 373-381 
    Details
    ISSN: 0047-2484
    Keywords: Brazil ; albumin rare variant ; migration patterns ; race mixture, malaria
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0047-2484(83)80165-1
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  • 4
    Electronic Resource
    Electronic Resource
    Tapirs, Tractors, and Tapes: The Changing Economy and Ecology of the Xavánte Indians of Central Brazil (1997)
    Springer
    Human ecology 25 (1997), S. 545-566 
    Details
    ISSN: 1572-9915
    Keywords: South American Indians ; Brazil ; Amazonia ; development ; human ecology ; land use ; Xavánte ; agriculture ; land use ; nutrition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Ethnic Sciences
    Notes: Abstract This paper explores the process of change in a Brazilian indigenous community, relating it to historical, economical, and political forces at the regional and national levels, as well as to environmental variables. In the light of current fieldwork, we examine the predictions of a model constructed 20 years ago based on fieldwork in this and three other Indian communities of Central Brazil by Daniel Gross and collaborators. This model ascribed involvement in the market economy of small-scale communities primarily to land circumscription and resulting environmental degradation, increasing the labor cost of subsistence food production. We find that in the case of the Xavánte community entry into the market was more the result of a top-down government plan to implement mechanized rice production on Xavánte reservations. With the collapse of the project the Xavánte have, on the one hand, returned to a more “traditional” economy based on hunting, gathering, and swidden agriculture and, on the other hand, are innovating by marketing their cultural image through connections with national and international environmentalist organizations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1021881823603
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  • 5
    Electronic Resource
    Electronic Resource
    Temporal and spatial variation in agar from a population of Pterocladia capillacea (Gelidiales, Rhodophyta) from Brazil (1996)
    Springer
    Hydrobiologia 326-327 (1996), S. 501-504 
    Details
    ISSN: 1573-5117
    Keywords: agar ; Brazil ; Gelidiales ; Pterocladia ; Rhodophyta ; seaweed
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Pterocladia capillacea forms dense intertidal belts in southeastern Brazil, on moderately exposed rocky coasts. The studied population extends along a gradient of water exposure, where slightly different morphotypes can be recognized. Specimens were collected monthly from 3 points along the exposure gradient of its distribution (lower, medium and higher exposure), and analyzed for agar, sulfate and 3,6 anhydrogalactose content. Agar varied from 5–32% of dried seaweed with lower yields in the winter, and higher yields in late spring/early summer. Specimens from the surf side of the distribution had a consistently higher agar content throughout the year. Sulfate varied from 1–5%, and 3,6 AG from 27–48% of dried agar, without a clear variation among the sites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00047852
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  • 6
    Electronic Resource
    Electronic Resource
    Black piedra among the Zoró Indians from Amazônia (Brazil) (1989)
    Springer
    Mycopathologia 107 (1989), S. 57-60 
    Details
    ISSN: 1573-0832
    Keywords: Amerindians ; black piedra ; Brazil ; epidemiology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract A total of 130 Zoró Indians from the Brazilian Amazon were observed as part of an epidemiological survey. Black piedra was found in 74 (56.9%) individuals. Infection rates between the sexes were not significantly different. The age group least infected comprised the children, 0–10 years of age. The authors comment on the epidemiology of the infection among the Zoró.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00437590
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  • 7
    Electronic Resource
    Electronic Resource
    Investigation of an outbreak of endemic coccidioidomycosis in Brazil's Northeastern State of Piauí with a review of the occurrence and distribution of Coccidioides immitis in three other Brazilian states (2000)
    Springer
    Mycopathologia 148 (2000), S. 57-67 
    Details
    ISSN: 1573-0832
    Keywords: Brazil ; coccidioidomycosis ; Piauí ; outbreak
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract An outbreak of coccidioidomycosis is described that involved three individuals and eight of their dogs, who had engaged in a successful hunt for nine-banded armadillos (Dasypus novemcinctus) in the environs of Oeiras, a community in Brazil's north eastern state of Piauí.Diagnosis was based on clinical, serological and cultural findings. Four of 24 soil samples collected in and around the burrow of an armadillo yielded cultures of Coccidioides immitis, thus establishing the endemicity of that mould in the state of Piauí. A literature review revealed that C. immitis, aside from that state, is endemic in three other Brazilian states — Bahia, Ceará and Maranhão. These four contiguous states have semi-arid regions where climatic conditions and their flora are similar to those that exist in C. immitis's endemic regions in North, Central and South America.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007183022761
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  • 8
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    Suplementação de semente de Perila (Perilla frutescens) como fonte de ácido graxo ômega-3 em dieta para tilápia do Nilo. (2017)
    Universidade Estadual de Maringá. Centro de Ciências Agrárias. Programa de Pós-Graduação em Zootecnia
    Details
    Publication Date: 2021-05-19
    Description: The Nile tilapia (Oreochromis niloticus) is a fish of great current interest in fish farming, and the second group of freshwater fish cultivated over the world, behind only the carp. Freshwater fish such as Nile tilapia normally present low concentrations of n-3 VLC-PUFA content, including compared with sea fish. This aspect is related mainly the different food between the species and physiological changes. In freshwater fish, linoleic acid (LA, 18:2n-6) and alpha-linolenic acid (LNA, 18:3n-3) are metabolized by the same sequential desaturation and elongation enzyme systems, which results in the production of long-chain PUFA n-3 and n-6 series. Perilla frutescens is a plant that belongs to the Lamiaceae family native to Asia, whose seeds are a traditional source of oils produced in Korea, India, China, and other Asian countries. Its oil has the highest proportion of alpha-linolenic acid (LNA) among the vegetable, representing approximately 60% of its total fatty acid content. Thus, supplementation of perilla seed in the diet of tilapia becomes an alternative to improve the concentration of n-3 PUFA in muscle tissue. This study evaluated the effect of dietary supplementation of perilla Nile tilapia on the fatty acid composition of muscle tissue as a function of feeding time length. Were used 400 Nile tilapia (Oreochromis niloticus) with initial live weight 245 ± 10.96 g, distributed in eight net cages. The tilapia received for 60 days a diet with perilla seed ground (5%) and one control, with soybean oil. At the beginning of the experiment and every 15 days were analyzed the composition of proximal muscle tissues of tilapia and quantification of fatty acids (mg / g total lipids) by gas chromatography. Among the experimental diets and during the feeding period, the values of total lipids in muscle tissue of tilapia did not differ (p〉 0.05). The fatty acid composition of muscle tissue of tilapia was affected by diet. According to the quantitative analysis of fatty acids, were observed an increase in n-3 PUFA, especially the LNA during feeding with the diet supplemented with perilla, proving the influence of diet on the lipid composition of fish. The n-6/n-3 ratio during the period of feeding the diet with perilla has from 11.57 (0 days) to 3.04 within 60 days of experiment. Through the inclusion of perilla seed in the diet of Nile tilapia, verified the incorporation of n-3 fatty acids and an improvement in n-3/n-6 ratio. Therefore, supplementation of perilla contributed to raising the nutritional quality of the total lipids of muscle tissue of Nile tilapia.
    Description: A tilápia do Nilo (Oreochromis niloticus) é uma espécie de grande interesse na piscicultura atual, sendo o segundo grupo de peixes de água doce mais cultivado no mundo, ficando atrás somente das carpas. Peixes de água continental, como tilápia do Nilo normalmente apresentam baixas concentrações de ácidos graxos poli-insaturados (AGPI) da família n-3, em comparação com os peixes marinhos. Esse aspecto está relacionado, principalmente, a alimentação diferenciada entre as espécies e as modificações fisiológicas. Em peixes de água doce, ácido linoléico (LA, 18:2 n-6) e ácido alfa-linolênico (LNA, 18:3 n-3) são metabolizados pelos mesmos sistemas enzimáticos de dessaturação seqüencial e alongamento, o que resulta na produção de AGPI da série n-3 e n-6. Perilla frutescens é uma planta que pertence à família Lamiaceae nativa da Ásia, cujas sementes são uma fonte tradicional dos óleos produzidos na Coréia, Índia, China e outros países asiáticos. Seu óleo apresenta a maior proporção de ácido alfalinolênico (LNA) entre os vegetais, representando aproximadamente 60% de seu índice total de ácidos graxos. Desse modo, a suplementação da semente de perila na dieta de tilápias torna-se uma alternativa para melhorar a concentração de AGPI n-3 no tecido muscular. Este estudo teve como objetivo avaliar o efeito da suplementação de perila na dieta de tilápia do Nilo sobre a composição em ácidos graxos do tecido muscular em função do tempo de alimentação. Foram utilizadas 400 tilápias do Nilo (Oreochromis niloticus), com peso médio inicial de 245 ± 10,96g, distribuídos em oito tanques-rede. As tilápias receberam por 60 dias uma dieta com semente de perila moída (5%) e outra controle, com óleo de soja. No início do experimento e a cada 15 dias foram analisadas a composição proximal dos tecidos musculares das tilápias e a quantificação de ácidos graxos (mg/g de lipídios totais), por cromatografia em fase gasosa. Entre as dietas experimentais e durante o período de alimentação, os valores de lipídios totais no tecido muscular das tilápias não diferiram entre si (p〉0,05). A composição em ácidos graxos do tecido muscular de tilápias foi afeta pela dieta. De acordo com a análise quantitativa de ácidos graxos, foi possível verificar o aumento dos AGPI n-3, principalmente do LNA durante a alimentação com a dieta suplementada com perila, comprovando a influência da dieta sobre a composição lipídica dos peixes. A razão n-6/n-3 durante o período de alimentação com a dieta perila passou de 11,57 (0 dias) para 3,04 em 60 dias de experimento. Através da inclusão da semente de perila na dieta de tilápias do Nilo, verificou-se a incorporação de ácidos graxos n-3 e uma melhora na relação n- 3/n-6. Portanto, a suplementação de perila contribuiu para elevar a qualidade nutricional dos lipídios totais do tecido muscular de tilápia do Nilo.
    Description: Masters
    Keywords: Brazil ; Perilla frutescens ; Perilla frutescens ; Alimentação ; LNA alpha linolenic acid ; Brasil ; Ácido Alfa linolênico (LNA) ; Tilápia do Nilo ; Ácidos graxos ômega-3 ; Nile tilapia ; Omega-3
    Repository Name: AquaDocs
    Type: Thesis/Dissertation
    Format: 33pp.
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  • 9
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    A list of commercial fish species from Santarem, state of Para, Brazil (2021)
    In:  http://aquaticcommons.org/id/eprint/9190 | 115 | 2012-11-28 13:33:10 | 9190 | WorldFish Center
    Details
    Publication Date: 2021-07-03
    Description: A list, comprising 129 species in 23 families, is presented of the fish commonly caught in 1992/93 in the commercial fisheries around Santarem, Para State, Brazil. The most important families were the Pimelodidae (22 spp.), Cichildae (20) and Serrasalmidae (15), and six species contribute over 50% of the catch in weight.
    Keywords: Fisheries ; Commercial species ; Check lists ; Fishery resources ; Brazil ; Pisces
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 41-44
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  • 10
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    Eventos climáticos extremos : a homogeneização da comunidade aquática pela seca em escala local. (2017)
    Universidade Estadual de Maringá. Departamento de Biologia. Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais.
    Details
    Publication Date: 2022-05-16
    Description: Extreme hydrological events tend to become frequent together with global warming and promote changes in species composition and dominance. Thus, we used benthic macroinvertebrates to test the hypothesis that drought events determine local biotic homogenization in shallow floodplain lakes. We took sediment samples in three sampling areas of shallow floodplain lake during reference months, a normal hydrological cycle, and during a prolonged drought in an atypical hydrological cycle. Our findings indicate that species density, richness and diversity increased during the droughts. However, community composition significantly differed between reference and drought periods, in which only species adapted to unfavorable environmental conditions occurred. Beta diversity measured spatially during the reference and drought periods was significantly different, with lower centroide distances in the drought period. Then, in scenarios of climate change with frequent extreme events, we expect that droughts may cause negative impacts on aquatic communities, leading to biotic homogenization. Moreover, our findings indicate that prolonged droughts could increase the time needed to community recovery, suggesting low resilience. Therefore, increasing frequency of extreme drought events may promote an alternative community structure and potentially generate a community structure regime shift.
    Description: Eventos hidrológicos extremos e períodos mais prolongados de seca tendem a se tornar mais comuns com o aumento da temperatura global e promover mudanças na composição e dominância de espécies. Assim, macroinvertebrados bentônicos foram utilizados para testar a hipótese de que os eventos de seca extrema promovem homogeneização biótica local nos ambientes aquáticos contidos em planícies de inundação. Amostras de sedimento foram obtidas em três pontos de uma lagoa, durante meses de referência, que compõem um ciclo hidrológico normal, e meses de seca prolongada, com ciclo hidrológico atípico. Os resultados indicaram aumento na densidade, riqueza e diversidade de Shannon para os meses de seca prolongada. Notou-se segregação da composição das comunidades entre os períodos de referência e seca prolongada, com variações significativas na composição, mostrando que espécies capazes de sobreviver em condições desfavoráveis conseguiram manter-se no ambiente. Considerando o valor médio da diversidade beta espacial obtida durante o período de referência e seca prolongada, foram observadas diferenças significativas, com menores valores de distância ao centroide observados durante a seca prolongada. Dessa forma, em um cenário de mudanças climáticas no qual eventos extremos se tornarão mais frequente, espera-se que eventos de seca extrema causem um impacto negativo sobre as comunidades aquáticas, acarretando na homogeneização das comunidades. Além disso, os resultados indicam que o prolongamento de um evento de seca poderia elevar o tempo de resiliência da comunidade, pois ao final do período de seca a comunidade não retornou à estrutura registrada anterior à seca. Sendo assim, o aumento na frequência de ocorrência de períodos prolongados de seca, poderia promover uma estrutura de comunidade alternativa e potencialmente causar um regime de alternância entre estruturas de comunidades.
    Description: Masters
    Keywords: Community ; Ecology ; Upper Paraná River ; Brazil ; Floodplain ; Resilience ; Benthic macroinvertebrates ; Chironomidae ; Diversidade beta ; Similaridade biótica ; Resiliência ; Substituição de espécie ; Alto rio Paraná ; Biotic similarity ; Brasil ; Species turnover ; Beta diversity ; Seca prolongada ; Comunidades, Ecologia de ; Comunidade aquática ; Efeitos ; Ecologia de comunidades ; Macroinvertebrados bentônicos ; Mudanças climáticas ; Morfoespécie ; Chironomidae (Diptera) ; Planície de inundação
    Repository Name: AquaDocs
    Type: Thesis/Dissertation
    Format: 28pp.
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