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Demanda por pescados no Brasil entre 2002 e 2003; Brazilian fish demand between 2002 and 2003

Sonoda, Daniel Yokoyama
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 23/01/2007 PT
Relevância na Pesquisa
36.64%
O consumo per capita de pescados no Brasil é relativamente baixo quando comparado com as outras proteínas de origem animais. Do lado da oferta, este fenômeno está relacionado com diversos fatores como, por exemplo, a sobre pesca, a baixa produção nacional, a distância entre centros produtores e consumidores etc. Este trabalho aborda os fatores que estão ligados à sua demanda, tais como: a influência dos preços e da renda da população no seu consumo. Inicialmente, caracterizou-se o problema da oferta de pescados no Brasil. Em seguida, foi feita uma revisão sobre a teoria econômica e o método de cálculo da função e de suas elasticidades para a forma funcional conhecida por Almost Ideal Demand System - AIDS. A partir dos microdados da Pesquisa de Orçamento Familiar - POF 2002-2003, fez-se uma análise descritiva da demanda por pescados no Brasil. Finalmente, foram estimadas as funções demanda e calcularam-se as elasticidades para dois tipos de agrupamentos: um que considerou 5 grupos de proteínas animais e o outro com 7 grupos de alimentos. Estas funções foram estimadas para o Brasil e para duas macro-regiões: Norte-Nordeste e Centro-Sul. Os principais resultados são: o consumo per capita de pescados é baixo porque poucos domicílios consomem pescados. O consumo de pescado da Região Norte-Nordeste é significativamente diferente do padrão observado na Região Centro-Sul do país. Os principais produtos substitutos aos pescados no país são as proteínas mais elaboradas e não as carnes mais tradicionais como a de aves e as vermelhas. Os supermercados são os pontos de vendas mais utilizados pelos consumidores de pescados de renda mais elevada...

Migrações ascendentes de peixes neotropicais e hidrelétricas: proteção a jusante de turbinas e vertedouros e sistemas de transposição.; Upstream migrations of neotropical fishes and hidroelectric dams: protection downstream from turbines and from spillways and fish passages.

Junho, Ricardo Ahouagi Carneiro
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 22/10/2008 PT
Relevância na Pesquisa
36.65%
Este trabalho se propõe a examinar aspectos de engenharia, particularmente da engenharia hidráulica, referentes aos impactos dos aproveitamentos hidrelétricos sobre deslocamentos migratórios ascendentes de peixes, buscando identificar medidas para a redução da eventual mortalidade de peixes, em tubos de sucção de turbinas e em regiões de restituição do escoamento de vertedouros, e descrever os sistemas de transposição de peixes usuais, com destaque para escadas de peixes tipo ranhura vertical. A revisão bibliográfica se inicia abordando migrações de peixes e o impacto causado pela implantação de usinas hidrelétricas, vindo, em seguida, aspectos hidráulicos relativos a barreiras para o impedimento da entrada de peixes em tomadas dágua e sua possível aplicação para tubos de sucção de turbinas. São relatados estudos de casos relativos à implantação de canais de restituição em vertedouros, para evitar a mortalidade de peixes, eventualmente aprisionados em poços e depressões na região de restituição do escoamento vertido, quando esta não possui água permanentemente, após o fechamento das comportas. A revisão da literatura prossegue tratando de sistemas usuais de transposição de peixes para montante...

Comparação de parâmetros de estresse oxidativo entre ratos expostos a metilmercúrio em meio aquoso e a peixes contaminados com o metal; Comparison of oxidative stress parameters between rats exposed to methylmercury in aqueous solution and fish contaminated with the metal

Grotto, Denise
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 04/05/2011 PT
Relevância na Pesquisa
36.64%
Os efeitos tóxicos decorrente do consumo de peixes contaminados com metilmercúrio (MeHg) tem sido muito discutido no Brasil, especialmente na Região Amazônica, onde estudos a esse respeito têm mostrado resultados conflitantes. Fatores nutricionais associados à exposição ao MeHg ou a forma na qual o MeHg se encontra ligada no peixe poderiam estar alterando sua toxicidade. Diante destas controvérsias, ratos foram subcronicamente expostos à solução de MeHg, selênio (Se) e óleo de peixe, ou foram alimentados com ração contendo peixes contaminados com MeHg. Biomarcadores de estresse oxidativo, presença de processo inflamatório, genotoxicidade, pressão sistólica, concentração de óxido nítrico (NO), de mercúrio (Hg) total e de Se em diferentes tecidos foram avaliados. Ratos expostos à solução de MeHg, mostraram significante diminuição de antioxidantes endógenos, aumento na peroxidação lipídica, hipertensão, inflamação de tecidos, dano ao DNA e diminuição de NO. A associação MeHg+Se mostrou significativa proteção antioxidante e antigenotóxica, porém não foi capaz de proteger a inflamação induzida pelo MeHg e, surpreendentemente, ratos tratados somente com Se apresentaram aumento significativo na pressão sistólica. Na associação MeHg+óleo de peixe observou-se significativa ação anti-inflamatória...

Chemical communication of handling stress in fish

Gil Barcellos, Leonardo Jose; Volpato, Gilson Luiz; Barreto, Rodrigo Egydio; Coldebella, Ivanir; Ferreira, Daiane
Fonte: Pergamon-Elsevier B.V. Ltd Publicador: Pergamon-Elsevier B.V. Ltd
Tipo: Artigo de Revista Científica Formato: 372-375
ENG
Relevância na Pesquisa
36.67%
We investigated whether juveniles of the nocturnal fish jundia (Rhamdia quelen) and the diurnal fish Nile tilapia (Oreochromis niloticus) are able to chemically communicate stress to conspecifics. Groups of 8 fish were reared in tanks under recirculated water (water exchanged among all the tanks) for each species. Fish were handled in half of the tanks (stressor fish) and whole-body cortisol concentrations were compared among handled fish, non-handled fish exposed to water from the handled fish, and non-handled control fish held with no water communication. For each treatment cortisol concentrations were determined before exposure to the stressor (basal levels) and after 1, 2, 4, 8, and 24 h. Basal levels of cortisol confirmed fish were unstressed in the beginning of the experiment. Cortisol was increased in the stressor fish 1 h after handling. Fish receiving water from the stressor fish increased cortisol levels later (2 h after the stressor fish were handled). As the isolated control group maintained cortisol levels unchanged throughout the experiment, we concluded that some chemical factor was released by the stressed fish in the water and thus stressed the conspecifics. This pattern was similar for both unrelated species, thus suggesting that this communication might have evolved earlier in fish and reinforcing the biological value of this kind of information. Published by Elsevier B.V.

Effects of hydrological variability on fish assemblages in small Mediterranean streams: implications on ecological assessment.

Matono, Paula; Bernardo, João Manuel; Oberdorff, Tierry; Ilhéu, Maria
Fonte: Ecological Indicators Publicador: Ecological Indicators
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
36.65%
Small Mediterranean streams are shaped by predictable seasonal events of flooding and drying over an annual cycle, and present a strong inter and intra-annual variation in flow regime. Native fish assemblages in these streams are adapted to this natural evironmental variability. The distinction of human-induced disturbances from the natural ones is thus a crucial step before assessing the ecological status of these streams. In this aim, the present study evaluates the effects of natural hydrological variability on fish assemblages from disturbed and least disturbed sites in small intermittent streams of south Portugal. Data were collected over the last two decades (1996–2011) in 14 sites located in the Guadiana and Sado river basins. High variability of fish assemblages was strongly dependent on human-induced disturbances, particularly nutrient/organic load and sediment load, and on natural hydrological variability. Natural hydrological variability can act jointly with anthropogenic disturbances, producing changes on fish assemblages structure of small intermittent streams. In least disturbed sites, despite the natural disturbances caused by inter-annual rainfall variations (including drought and flood events), fish assemblages maintained a long-term stability and revealed a high resilience. On the contrary...

Effects of hydrological variability on fish assemblages in small Mediterranean streams: implications on ecological assessment.

Matono, Paula; Bernardo, João Manuel; Oberdorff, Thierry; Ilhéu, Maria
Fonte: Elsevier Publicador: Elsevier
Tipo: Artigo de Revista Científica
POR
Relevância na Pesquisa
36.65%
Small Mediterranean streams are shaped by predictable seasonal events of flooding and drying over an annual cycle, and present a strong inter and intra-annual variation in flow regime. Native fish assemblages in these streams are adapted to this natural environmental variability. The distinction of human-induced disturbances from the natural ones is thus a crucial step before assessing the ecological status of these streams. In this aim, the present study evaluates the effects of natural hydrological variability on fish assemblages from disturbed and least disturbed sites in small intermittent streams of south Portugal. Data were collected over the last two decades (1996–2011) in 14 sites located in the Guadiana and Sado river basins. High variability of fish assemblages was strongly dependent on human-induced disturbances, particularly nutrient/organic load and sediment load, and on natural hydrological variability. Natural hydrological variability can act jointly with anthropogenic disturbances, producing changes on fish assemblages structure of small intermittent streams. In least disturbed sites, despite the natural disturbances caused by inter-annual rainfall variations (including drought and flood events), fish assemblages maintained a long-term stability and revealed a high resilience. On the contrary...

Is fish passage technology saving fish resources in the lower La Plata River basin?

Oldani,Norberto Oscar; Baigún,Claudio Rafael Mariano; Nestler,John Michael; Goodwin,Richard Andrew
Fonte: Sociedade Brasileira de Ictiologia Publicador: Sociedade Brasileira de Ictiologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2007 EN
Relevância na Pesquisa
36.67%
Over 450 dams have been constructed in the upper Paraná River basin in Brazil during the past 40 years. River regulation by these dams is considered a primary factor in the reduction of fish diversity and depletion of migratory species. In contrast to the upper Paraná Basin, only two large dams (both with upstream fish passage) have been constructed in the lower La Plata River basin. Fishery managers in the lower basin are concerned that existing and planned dams will further deplete populations of migratory fish species that constitute important recreational and commercial fisheries as has occurred in the upper basin. We assessed the sustainability of fisheries in the lower basin in the face of increased river regulation by using literature information to describe the efficiency of the fish passage systems used to mitigate river regulation impacts on fisheries. Our analysis shows that fish passage systems at both lower basin dams, Yacyreta and Salto Grande, fail to transfer sufficient numbers of upstream migrants to sustain populations of migratory species. Fish passage efficiency of target species in the fish elevators at Yacyreta is less than 2%. Fish diversity in the fish elevators is low because about 85% of the fish belong to only three non-migratory species (Pimelodus maculatus...

Fish ladder of Lajeado Dam: migrations on one-way routes?

Agostinho,Angelo Antônio; Marques,Elineide Eugênio; Agostinho,Carlos Sérgio; Almeida,Deusimar Augusto de; Oliveira,Rafael José de; Melo,Jussiclene Rodrigues Bezerra de
Fonte: Sociedade Brasileira de Ictiologia Publicador: Sociedade Brasileira de Ictiologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2007 EN
Relevância na Pesquisa
36.66%
Fish ladders are generally conceived to reestablish connectivity among critical habitats for migratory species, thus mitigating the impacts of the blockage of migration routes by dams. If this management tool is to be meaningful for conserving fish species, it must provide a fully permeable connection and assure both upward and downward movements. However, because reservoirs have very different hydrodynamics than the original river, it is expected that, at least in the inner area, they may constitute an additional barrier to this movement, especially for descending fish. Thus, the present study sought to determine if migratory fish and their offspring disperse downstream from the dam after ascending a ladder and spawning in the upper reaches of a basin. To achieve this purpose, we evaluated the limitation imposed by lentic areas to the descent of eggs, larvae and adults of migratory species; we also determined the abundance and composition of larvae present in the plankton near the dam, and compared the intensity of the upward and downward movements of adult fish. Samples of ichthyoplankton were taken upriver, inside the reservoir, in the river downstream from the dam, and in the forebay of the Lajeado Dam on the Tocantins River (Luis Eduardo Magalhães Hydroelectric Plant)...

Selectivity of fish ladders: a bottleneck in Neotropical fish movement

Agostinho,Carlos Sérgio; Agostinho,Angelo Antônio; Pelicice,Fernando; Almeida,Deusimar Augusto de; Marques,Elineide Eugênio
Fonte: Sociedade Brasileira de Ictiologia Publicador: Sociedade Brasileira de Ictiologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2007 EN
Relevância na Pesquisa
36.65%
Although dozens of fish ladders have been constructed at dams of Brazilian reservoirs, there are few studies evaluating their efficiency as a tool for the conservation of Neotropical ichthyofauna, especially for migratory species. Therefore, the present study evaluated the selectivity of the species that entered and ascended the fish ladder located next to Lajeado Dam (Luis Eduardo Magalhães Hydroelectric Power Plant) on the Tocantins River. Samples were taken monthly from November, 2002 through October, 2003, in the resting pools of the ladder, using cast nets, and in the downstream stretch, using gillnets. The selectivity of the ladder in attracting fish was evaluated by comparing the occurrence, relative abundance, dominance and the congruence of abundance ranks of migratory and non-migratory species in the ladder and in the stretch of river immediately downstream. Species richness and fish abundance in the resting pools were used to evaluate selectivity along the ladder. The effects on selectivity by temporal variations in water level downriver and maximum flow velocity in the fish ladder were also analyzed. Out of the 130 species recorded downriver, 62.3% were caught in the ladder, and migratory species were clearly favored. However...

Fish ladders: safe fish passage or hotspot for predation?

Agostinho,Angelo Antonio; Agostinho,Carlos Sergio; Pelicice,Fernando Mayer; Marques,Elineide Eugênio
Fonte: Sociedade Brasileira de Ictiologia Publicador: Sociedade Brasileira de Ictiologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/10/2012 EN
Relevância na Pesquisa
36.64%
Fish ladders are a strategy for conserving biodiversity, as they can provide connectivity between fragmented habitats and reduce predation on shoals that accumulate immediately below dams. Although the impact of predation downstream of reservoirs has been investigated, especially in juvenile salmonids during their downstream movements, nothing is known about predation on Neotropical fish in the attraction and containment areas commonly found in translocation facilities. This study analysed predation in a fish passage system at the Lajeado Dam on the Tocantins River in Brazil. The abundance, distribution, and the permanence (time spent) of large predatory fish along the ladder, the injuries imposed by piranhas during passage and the presence of other vertebrate predators were investigated. From December 2002 to October 2003, sampling was conducted in four regions (downstream, along the ladder, in the forebay, and upstream of the reservoir) using gillnets, cast nets and counts or visual observations. The captured fish were tagged with thread and beads, and any mutilations were registered. Fish, birds and dolphins were the main predator groups observed, with a predominance of the first two groups. The entrance to the ladder, in the downstream region...

Which Fish Should I Eat? Perspectives Influencing Fish Consumption Choices

Karagas, Margaret R.; Mariën, Koenraad; Rheinberger, Christoph M.; Schoeny, Rita; Oken, Emily; Choi, Anna Lai; Korrick, Susan Abigail; Sunderland, Elsie
Fonte: National Institute of Environmental Health Sciences Publicador: National Institute of Environmental Health Sciences
Tipo: Artigo de Revista Científica
EN_US
Relevância na Pesquisa
36.67%
Background: Diverse perspectives have influenced fish consumption choices. Objectives: We summarized the issue of fish consumption choice from toxicological, nutritional, ecological, and economic points of view; identified areas of overlap and disagreement among these viewpoints; and reviewed effects of previous fish consumption advisories. Methods: We reviewed published scientific literature, public health guidelines, and advisories related to fish consumption, focusing on advisories targeted at U.S. populations. However, our conclusions apply to groups having similar fish consumption patterns. Discussion: There are many possible combinations of matters related to fish consumption, but few, if any, fish consumption patterns optimize all domains. Fish provides a rich source of protein and other nutrients, but because of contamination by methylmercury and other toxicants, higher fish intake often leads to greater toxicant exposure. Furthermore, stocks of wild fish are not adequate to meet the nutrient demands of the growing world population, and fish consumption choices also have a broad economic impact on the fishing industry. Most guidance does not account for ecological and economic impacts of different fish consumption choices. Conclusion: Despite the relative lack of information integrating the health...

Fish to 2030 : Prospects for Fisheries and Aquaculture

World Bank
Fonte: Washington, DC Publicador: Washington, DC
EN_US
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36.71%
This report analyzes global prospects for fisheries and aquaculture. The World Bank Group (WBG) Agriculture Action Plan 2013-15 summarizes critical challenges facing the global food and agriculture sector. An ever-increasing global population necessitates adequate food and nutrition for the growing population through increased production and reduced waste. Production increase must occur in a context where resources necessary for food production, such as land and water, are even scarcer in a more crowded world, and thus the sector needs to be far more efficient in utilizing productive resources. The important issues addressed herein are: 1) health of global capture fisheries; 2) the role of aquaculture in filling the global fish supply - demand gap and potentially reducing the pressure on capture fisheries; and 3) implications of changes in the global fish markets on fish consumption, especially in China and Sub-Saharan Africa.

Reduction of cardiovascular risk factors with longterm fish oil treatment in early rheumatoid arthritis

Cleland, L.; Caughey, G.; James, M.; Proudman, S.
Fonte: J Rheumatol Publ Co Publicador: J Rheumatol Publ Co
Tipo: Artigo de Revista Científica
Publicado em //2006 EN
Relevância na Pesquisa
36.65%
OBJECTIVE: Rheumatoid arthritis (RA) is associated with increased risk for cardiovascular (CV) events through multiple factors. Fish oil has been shown to reduce symptoms in RA and to reduce CV risk. We assessed the effect of an antiinflammatory dose of fish oil on CV risk factors within a program of combination chemotherapy for patients with early RA. METHODS: Patients who chose not to take fish oil (n = 13) were compared with patients who achieved a sustained elevation of eicosapentaenoic acid (EPA) in plasma phospholipid fatty acids (> 5% total fatty acids) while taking fish oil over a 3-year period (n = 18). We examined cellular content of arachidonic acid (AA), synthesis of thromboxane A2 and prostaglandin E2, use of nonsteroidal antiinflammatory drugs (NSAID), traditional CV lipid risk factors, and disease activity at 3 years. RESULTS: At 3 years, AA (as a proportion of AA plus long-chain n-3 fatty acids that can compete with AA for cyclooxygenase metabolism) was 30% lower in platelets and 40% lower in peripheral blood mononuclear cells in subjects taking fish oil. Serum thromboxane B2 was 35% lower and lipopolysaccharide-stimulated whole-blood prostaglandin E2 was 41% lower with fish oil ingestion compared to no fish oil. NSAID use was reduced by 75% from baseline with fish oil (p < 0.05) and by 37% without fish oil (NS). Favorable changes in fasting blood lipids were seen with...

Effects of dietary fish oil and fibre on contractility of gut smooth muscle.

Patten, Glen Stephen
Fonte: Universidade de Adelaide Publicador: Universidade de Adelaide
Tipo: Tese de Doutorado
Publicado em //2008
Relevância na Pesquisa
36.68%
From animal experimentation, and studies using in vitro models, there was evidence in the literature to suggest that dietary fibre may influence contractility and motility of the gastrointestinal tract and long chain (LC) n-3 polyunsaturated fatty acids (PUFAs) from marine sources may influence contractility of smooth muscle cells in blood vessels. The hypothesis of this thesis was that dietary fish oil and/or fibre influence the contractility of isolated intact sections of gut smooth muscle tissue from small animal models. Methodology was established to measure in vitro contractility of intact pieces of guinea pig ileum with the serosal side isolated from the lumen. It was demonstrated that four amino acid peptides from κ-casein (casoxins) applied to the lumen overcame morphine-induced inhibition of contraction. Using this established technology, the guinea pig was used to investigate the effects of dietary fibre and fish oil supplementation on gut in vitro contractility. In separate experiments, changes in sensitivity to electrically-driven and 8-iso-prostanglandin (PG)E₂-induced contractility were demonstrated for dietary fibre and fish oil. A modified, isolated gut super-perfusion system was then established for the rat to validate these findings. It was subsequently shown that LC n-3 PUFA from dietary fish oil significantly increased maximal contraction in response to the G-protein coupled receptor modulators...

Effects of exposures to the plasticiser, di-n-butyl phthalate and the pharmaceutical, flutamide on the biomarkers of reproduction in Australian freshwater fish species, Murray rainbowfish (Melanotaenia fluviatilis).

Bhatia, Harpreet
Fonte: Universidade de Adelaide Publicador: Universidade de Adelaide
Tipo: Tese de Doutorado
Publicado em //2014
Relevância na Pesquisa
36.7%
With the detection of anti-androgenicity in the effluents from the wastewater treatment plants (WWTPs), there is speculation that sexual disruption in fish is a multi-causal condition involving anti-androgens. Much of the research has focussed on deciphering the modes-of-action (MoAs) of (anti)estrogens and androgens. However, effects of androgen receptor (AR) antagonists have not been fully characterised and remain elusive in fish. The present study aimed to investigate the effects of the classic mammalian anti-androgen, flutamide and the emerging industrial pollutant, di-n-butyl phthalate (DnBP) on the biomarkers of reproduction in adult (male and female) and juvenile Murray rainbowfish (Melanotaenia fluviatilis). Flutamide is the “pure” anti-androgen designed to treat prostate cancer in men and polycystic ovarian syndrome in women. It has also been extensively used in toxicity testing in mammals. The in vitro anti-androgenic activity in the aquatic environment worldwide is measured in flutamide equivalents. Phthalates are a class of synthetic industrial chemicals commonly found in the aquatic environment worldwide. They have been recognised as anti-androgens in male mammals but little is known about their endocrine-disrupting effects in the native Australian fish species. Due to its detection in freshwater both in Australia and worldwide and considering its higher solubility in water (11 mg/L)...

Mercury bioaccumulation, human exposure, and fish consumption recommendations regarding mercury intake; Bioacumulação de mercúrio, exposição humana e recomendações para o consumo de peixe considerando a ingestão de mercúrio

Vieira, Hugo Miguel Coelho da Silva
Fonte: Universidade de Aveiro Publicador: Universidade de Aveiro
Tipo: Dissertação de Mestrado
ENG
Relevância na Pesquisa
36.66%
Mercury (Hg) is classified as a pollutant of primary importance because of its high degree of toxicity, persistence and bioaccumulative properties, especially in the aquatic environment. It is released from natural and anthropogenic sources, and once in the environment, the inorganic Hg can be converted in to organic Hg (Methylmercury – MeHg) through bacterial processes. MeHg tends to bioaccumulate and biomagnify through the food web, representing a serious risk to human health. Due to the health risks of excessive Hg exposure, international agencies such as the USEPA (United States Environmental Protection Agency) have established safety levels (reference doses (RfD)) of daily exposure, being the Hg concentration present in human hair used to estimate MeHg exposure. Fish is an important component of a healthy diet for the human population and the fish consumption is expected to be relatively stable in the next two decades; however, fish is also considered a major source of MeHg exposure to human population. The key question of the present study was evaluating the Hg bioaccumulation in humans based in fish consumption. Specific tasks were delineated: (i) evaluatue the human exposure to Hg via fish consumption using a food frequency questionnaire...

Turning the Tide : Saving Fish and Fishers

World Bank
Fonte: Washington, DC Publicador: Washington, DC
Tipo: Publications & Research :: Working Paper; Publications & Research
ENGLISH; EN_US
Relevância na Pesquisa
36.71%
The Millennium Ecosystem Assessment, the first global assessment of the state of the world's ecological health, published in March 2005, identified global fisheries as one of fi ve global systems in critical condition. This paper is one of many studies that show how on local, regional, and global scales, fish are taken out of the sea far faster than many existing fishstocks can replenish themselves. The World Bank Group recognizes that it is time for a proactive, international approach to improve the fisheries sector worldwide. The challenge in moving toward a sustainable fishing industry is to maintain economic growth and development by enhancing productivity and the wealth of fisheries, while avoiding the overfi shing and ecological degradation that we see today. The World Bank Group's current efforts concentrate on coastal management, inland fisheries, and smallholder aquaculture operations, mostly in developing countries in Africa and East Asia. The World Bank Group will broaden its support for sustainable fisheries at country...

Self fish

Rogers, Douglas E.
Fonte: Rochester Instituto de Tecnologia Publicador: Rochester Instituto de Tecnologia
Tipo: Tese de Doutorado
EN_US
Relevância na Pesquisa
36.68%
Without the pursuit of love and happiness, breath is simply the sand of an hourglass pouring away to our time of passing. Love is the reason we are alive. To spend even a moment in misery is a moment wasted. Love is the goal of humanity. Everyone has or will experience love in its many forms over the course of a lifetime. Many, out of ignorance, habit, or sheer desperation, will fall in love with the wrong person. Most of us have or will have that one failed relationship, the one we reflect on as the relationship that taught us the most about who we are, what makes us happy, and what we seek or try to avoid in a mate. Through failure we learn what we can improve about ourselves. We learn that there are no perfect people and to try to make them that way is a losing battle, a never-ending, fruitless effort. Regardless, we will always try. Our happiness is dependent upon our honesty in defining ourselves. That is, if you are not happy, you cannot make yourself so simply by ignoring your own needs and catering to the needs of others. Additionally, you cannot make others happy by projecting your happiness upon them. When we are happy, we are being honest, even if only with ourselves. Unhappiness is wanting. If our needs are not being met...

Attitudinal determinants of fish consumption in Spain and Poland

Pérez-Cueto,F. J. A.; Pieniak,Z.; Verbeke,W.
Fonte: Nutrición Hospitalaria Publicador: Nutrición Hospitalaria
Tipo: info:eu-repo/semantics/article; journal article; info:eu-repo/semantics/publishedVersion Formato: text/html; application/pdf
Publicado em 01/12/2011 ENG
Relevância na Pesquisa
36.66%
Objective: To identify attitudinal determinants of fish consumption in Spain and Poland, and to discuss the potential impact of local healthy eating policies in the observed reported frequency of fish consumption. Design: Repeated survey analysis , multivariate linear regression analysis. Data collected through a questionnaire that included socio-demographics, self-reported anthropometrics, as well as validated items of attitudinal and involvement scales, validated items of knowledge about fish, and behaviours (reported fish consumption). Setting: Consumer survey in Poland and Spain, 1800 respondents in 2004 and 1815 respondents in 2008. Results: In Poland, intentions to consume more fish and reported fish consumption increased in the four years period between both surveys, together with objective knowledge regarding fish. In Spain with the exception of subjective knowledge, fish consumption at home and total fish consumption, all attitudinal and involvement scale changes were statistically significant. Multivariate regression revealed that age had a small but significant positive effect in all scales, except for satisfaction with life, fish consumption out of home and subjective health. Satisfaction with life and subjective knowledge were significantly determined by household size. The differences between countries were statistically significant for involvement with health and fish...

Impacts of fish on phosphorus budget dynamics of some SA reservoirs: Evaluating prospects of 'bottom up' phosphorus reduction in eutrophic systems through fish removal (biomanipulation)

Hart,RC; Harding,WR
Fonte: Water SA Publicador: Water SA
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/07/2015 EN
Relevância na Pesquisa
36.65%
Data on fish standing stocks in 7 South African reservoirs were used to assess prospects of reducing in-lake amounts of total phosphorus (TP) through remedial biomanipulation - the removal of fish to deplete internal stocks of biomass-incorporated TP and especially to restrict enhancement of TP availability through internal 'bottom up' recycling by fish. Literature-derived conversion functions were used to estimate the quantity of TP stored in fish biomass, recycled by fish through excretion, and released from bottom sediments through carp and catfish bioturbation. This provided a quasi mass-balance assessment of these contributory influences of fish on TP budgets of reservoirs ranging from mesotrophy to hypertrophy in trophic status (annual mean TP levels of 0.04-0.51 mg/l). Absolute contributions of fish were inevitably related directly to reservoir-specific fish stock abundance, both total-fish and coarse-fish biomass levels which increased with trophic status, generating parallel absolute increases in TP sinks and internal TP loading fluxes. On overall average, total fish stock sequestered 2.2 kg TP/ha in biomass, recycled 13.8 kg TP/ha/yr through excretion, and mobilized 8.0 kg TP/ha/yr through sediment bioturbation. Average values relative to external loadings in 5 reservoirs amounted to 3.8% (biomass)...