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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
581

Quantifying the role of parrotfish in the production and cycling of carbonate in coral reef ecosystems

Yarlett, Robert Thomas January 2018 (has links)
Parrotfish are a diverse and ubiquitous group found on coral reefs worldwide. They are categorised into three main feeding modes; the browsers, scrapers and excavators, which together perform a number of important functional roles on coral reefs. Scraper and excavator parrotfish are common on most Indo-Pacific coral reefs where their roles in bioerosion, sediment production, grazing pressure and sediment reworking have been shown to influence benthic community composition, reef growth potential and sediment supply to reef habitats and reef associated sedimentary landforms. However, despite the widely known importance of parrotfish on coral reefs, our understanding of how their roles in carbonate cycling vary among species and among whole parrotfish communities in different reef habitats remains limited. This thesis produces original contributions to knowledge in the areas of species specific bioerosion estimates for the central Indian Ocean, bottom-up controls of habitat type on parrotfish assemblages and how variations in parrotfish assemblages translate to contributions to carbonate cycling processes among different reef habitats. The study was carried out across eight habitats on an atoll-edge reef platform in the central Maldives, where it was found that parrotfish community composition was driven by reef structural complexity and substrate type. Parrotfish occurred in six of the eight habitats, comprising ~44% of the platform area. Among these habitats, overall grazing pressure, bioerosion rates, sediment reworking and sediment production varied markedly. These processes were also found to have different spatial patterns over the reef platform, showing that they are not necessarily tightly coupled. In addition, reef habitats can vary in their importance for both sediment supply, and the relative importance of reworked sediment. Parrotfish produced a wide range of sediment size fractions, from < 32 to 2000 μm and produced predominantly coral sands (>80%) between 125 and 1000 μm in diameter. This is comparable to the grain types found on local reef islands, and it is likely that the most significant supply of this material is from habitats on the atoll-edge side of the platform (which make up ~20% of the total platform area). Quantifying parrotfish functional roles and understanding the drivers behind these processes is important for informing future empirical and modelling studies, particularly as coral reefs undergo a time of dramatic environmental change.
582

Métabolomique, effets biologiques et caractère invasif de la macroalgue Asparagopsis taxiformis

Greff, Stéphane 28 November 2016 (has links)
Considérées comme des menaces pour les écosystèmes marins tropicaux et subtropicaux, les proliférations de macroalgues sont susceptibles de modifier le fonctionnement et la structure des récifs coralliens. Le genre Asparagopsis (Rhodophyta) est connu pour être largement distribué, introduit et parfois invasif dans certaines régions comme en Méditerranée occidentale. Le premier objectif était de corréler le métabolisme spécialisé et la bioactivité de l’algue à son génotype, et éventuellement à son caractère proliférant. Aucune corrélation génétique/métabolomique n’a été démontrée, ce qui laisse entendre que le métabolisme macroalgal serait principalement influencé par l'environnement et/ou sa flore microbienne associée. En milieu tempéré, A. taxiformis et A. armata présentent des signatures métabolomiques globalement similaires et associées à une bioactivité significativement plus importante qu'en milieu tropical. Cependant, même lorsqu’elle a été introduite, une même lignée génétique et un même phénotype chimique peuvent présenter des caractères proliférants opposés. En milieu tropical, les extraits de macroalgues testés in situ sur 4 espèces de coraux n'ont provoqué que de faibles blanchissements. En milieu tempéré, aucun effet biologique de l’algue n’a été enregistré sur le corail Astroides calycularis. Par contre des expériences en aquarium ont permis de montrer qu’A. taxiformis pouvait exprimer un métabolisme spécifique avec une bioactivité augmentée après 10 jours de contact avec ce corail. En conclusion, qu’elle soit indigène ou introduite, A. taxiformis exerce peu d’effets sur la santé des coraux, et le caractère invasif de cette algue reste une source de débat. / Considered as a major threat for sub–tropical and tropical ecosystems, macroalgal proliferations are susceptible to modify the structure and the functioning of coral reefs. The genus Asparagopsis (Rhodophyta) is known to be widespread, introduced and sometimes invasive in certain regions such as the Western Mediterranean Sea. The first objective of this thesis was to correlate the algal specialized metabolism and its bioactivity with its genotype, and eventually with its proliferation trait. No correlation between genetics and metabolomics has been demonstrated, which would suggest the main influence of environmental factors and/or the associated microbial diversity on the algal metabolism. In temperate regions, A. taxiformis and A. armata showed similar metabolomic fingerprints with bioactivities significantly higher than in tropical regions. However, even when it is introduced, a given genetic lineage and a given chemical phenotype can exhibit opposite proliferative traits. In tropical areas, algal extracts tested in situ on 4 coral species did not lead to any coral bleaching. In temperate areas, no biological effect of the alga was recorded on Astroides calycularis. However, some aquarium experiments allowed to show that A. taxiformis can express a specific metabolism, with an increased bioactivity after 10–days of contact with this coral. To conclude, either indigenous or introduced, A. taxiformis poorly affects corals’ health, and thus the invasiveness of this alga remains a matter of debate.
583

Sea cages, seaweeds and seascapes : Causes and consequences of spatial links between aquaculture and ecosystems

Hedberg, Nils January 2017 (has links)
Aquaculture is of growing importance in the global seafood production. The environmental impact of aquaculture will largely depend on the type of environment in which the aquaculture system is placed. Sometimes, due to the abiotic or biotic conditions of the seascape, certain aquaculture systems tend to be placed within or near specific ecosystems, a phenomenon that in this thesis is referred to as aquaculture system - ecosystem links. The exposed ecosystems can be more or less sensitive to the system specific impacts. Some links are known to be widespread and especially hazardous for the subjected ecosystem such as the one between the shrimp aquaculture and the mangrove forest ecosystem. The aim of this thesis was to identify and investigate causes and consequences of other spatial links between aquaculture and ecosystems in the tropical seascape. Two different aquaculture system - ecosystem links were identified by using high resolution satellite maps and coastal habitat maps; the link between sea cage aquaculture and coral reefs, and the one between seaweed farms and seagrass beds. This was followed by interviews with the sea cage- and seaweed farmers to find the drivers behind the farm site selection. Many seaweed farmers actively choose to establish their farms on sea grass beds but sea cage farmers did not consider coral reefs when choosing location for their farms. The investigated environmental consequences of the spatial link between sea cage aquaculture and coral reefs were considerable both on the local coral reef structure, and coral associated bacterial community. Furthermore, coral reef associated fish are used as seedlings and feed on the farms, which likely alter the coral food web and lower the ecosystem resilience. Unregulated use of last resort antibiotics in both fish- and lobster farms were also found to be a wide spread practice within the sea cage aquaculture system, suggesting a high risk for development of antibiotic resistant bacteria. The effects of seaweed farms on seagrass beds were not studied in this thesis but have earlier been shown to be rather substantial within the borders of the farm but less so outside the farm. Further, a nomenclature is presented to facilitate the discussion about production system - ecosystem links, which may also be used to be able to incorporate the landscape level within eco-certifying schemes or environmental risk assessments. Finally - increased awareness of the mechanisms that link specific aquaculture to specific habitats, would improve management practices and increase sustainability of an important and still growing food producing sector - the marine aquaculture. / <p>At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 2: Manuscript. Paper 3: Manuscript. Paper 4: Manuscript.</p>
584

Macrofauna associada a Millepora alcicornis Linnaeus, 1758 (CnidÃria: Hydrozoa) em Ãreas sobre diferentes nÃveis de influÃncia do turismo subaquÃtico na Ãrea de proteÃÃo ambiental estadual dos recifes de coral (RN) / Macrofauna associated with Millepora alcicornis Linnaeus, 1758 (Cnidaria: Hydrozoa) in areas on different levels of influence of underwater tourism in the state environmental protection of coral reefs (RN)

Tatiane Martins Garcia 08 April 2006 (has links)
O hidrÃide calcÃrio do gÃnero Mil/epora ocorre em regiÃes tropicais de todo o planeta como um componente regular dos recifes de coral. MilÃporas sÃo encontradas em profundidades menores que 1 atà 40 m. Os corais vivos criam uma sÃrie rica de habitats para um grande nÃmero de espÃcies fornecendo substrato para os organismos sedentÃrios e alimento ou abrigo para os organismos mÃveis. O objetivo deste estudo foi identificar e quantificar toda a macrofauna encontrada em colÃnias de Mil/epora a/cicornis na Ãrea de ProteÃÃo Estadual dos Recifes de Coral (RN). As 26 amostras foram coletadas manualmente atravÃs de mergulho autÃnomo, em profundidades de 1 a 3 m. No perÃodo de julho e novembro de 2004 e fevereiro de 2005, as colÃnias foram envolvidas por sacos plÃsticos e, em seguida, extraÃdas do substrato com o auxÃlio de martelo e talhadeira. Posteriormente, as amostras foram fixadas com formalina 4%. No laboratÃrio, as colÃnias foram analisadas para a retirada dos epibiontes e, em seguida, cuidadosamente fragmentadas para a remoÃÃo da fauna perfurante. Foram registrados 1.234 indivÃduos e 95 espÃcies de organismos nÃo coloniais dos grupos Crustacea, Echinodermata, Mollusca, Nemertea, Polychaeta e Sipuncula, e 86 colÃnias e 26 espÃcies de organismos coloniais dos tÃxons Cnidaria, Porifera e Tunicata. Os crustÃceos apresentaram o maior nÃmero de indivÃduos e espÃcies, seguidos por poliquetas e moluscos. Segundo coeficiente de correlaÃÃo de Spearman, o nÃmero de indivÃduos e espÃcies dos organismos nÃo coloniais associados aumenta com o crescimento da colÃnia. Em relaÃÃo à fauna colonial, os tunicados possuÃram maior nÃmero de colÃnias e os porÃferas, maior nÃmero de espÃcies. A epifauna dos grupos coloniais e nÃo coloniais foi mais numerosa que a endofauna. ComparaÃÃes entre milÃporas e corais escleractÃnios podem ser traÃadas devido a uma possÃvel convergÃncia funcional desses tÃxons. à possÃvel supor que as associaÃÃes com corais nÃo dependem exclusivamente da espÃcie hospedeira, pois espÃcies distintas habitam a mesma espÃcie de coral em regiÃes diferentes. Provavelmente o substrato exerÃe papel mais importante, cujas formas promovem a formaÃÃo de habitats distintos. / The limestone of the genus hidrÃide Mil / epora occurs in tropical regions around the planet as a regular component of coral reefs. MilÃporas are found at depths less than 1 to 40 m. The live coral create a rich variety of habitats for many species by providing substrate for sedentary organisms and food or shelter for the bodies moving. The aim of this study was to identify and quantify all the macrofauna found in colonies of Mil / epora a / cicornis Area of Protection of Coral Reefs of the State (RN). The 26 samples were collected manually through autonomous diving in depths from 1 to 3 m. In the period from July to November 2004 and February 2005, the colonies were surrounded by plastic bags and then extracted from the substrate with the aid of hammer and chisel. Subsequently, the samples were fixed with formalin 4%. In the laboratory, the colonies were tested for the withdrawal of epibiontes and then carefully to remove fragmented fauna Perforating. 1234 individuals were recorded and 95 species of non-colonial groups of Crustacea, Echinodermata, Mollusca, Nemertea, and Sipuncula Polychaeta, and 86 colonies and 26 species of organisms colonial taxa of Cnidaria, Porifera and Tunicata. The crustaceans had the highest number of individuals and species, followed by polychaetes and molluscs. According to Spearman correlation coefficient, the number of individuals and species of non-colonial increases associated with the growth of the colony. Regarding colonial fauna, tunicates owned the largest number of colonies and Porifera, greater number of species. The epifauna of non-colonial and colonial groups was larger that endofauna. Comparisons between milÃporas and coral escleractÃnios can be drawn due to a possible functional convergence of these taxa. You can assume that the associations with corals do not depend exclusively on the host species, as different species inhabit the same species of coral in different regions. Probably the most important role exercise substrate, which forms promote the formation of distinct habitats.
585

A prática do canto coral juvenil como recurso integrador para o ensino técnico em música / The practice of choral singing as a youth resource integrator for technical education in music

CARNEIRO, Vinícius Inácio 29 March 2011 (has links)
Made available in DSpace on 2014-07-29T16:25:10Z (GMT). No. of bitstreams: 1 CARNEIRO, Vinicius -.pdf: 597017 bytes, checksum: 053f7138e3fac850590486e1c72f3e84 (MD5) Previous issue date: 2011-03-29 / The present study investigates the curriculum integration aspects provided by youth choir practice, as a curricular component in the study of music at the technical (High School) level. The starting point was the course program of the discipline Choral Singing, in the Technical Course in Instrument at the Goias Federal Institute (IFG), class of 2010, as it related to the rest of the program. This investigation was based upon the evaluation of applied questionnaires, as well as upon the artistic results obtained. The investigation is to be guided by evaluation of questionnaires during the search. Part of this work is dedicated to report the author's experience as a conductor of the IFG, with emphasis on the occurrence of curriculum integration elements throughout. It was possible to verify that the curriculum integration, still occurs in a partial manner at the above mentioned institution. Therefore, the full potential of this integration has not been achieved as yet. / O presente estudo relata a experiência do autor enquanto regente do Coro do Instituto Federal de Educação, Ciência e Tecnologia de Goiás, na medida em que apresenta os conteúdos trabalhados na disciplina Canto Coral do Curso Técnico em Instrumento Musical, e ressalta a ocorrência de aspectos integradores disciplinares. Tomou-se como ponto de partida o programa da referida disciplina, no ano letivo de 2010, relacionando-a às demais disciplinas técnicas do curso. O estudo se norteou pela avaliação de questionários elaborados aplicados aos sujeitos, pelo resultado das avaliações curriculares da disciplina, bem como pela verificação do desenvolvimento musical da turma no período. Verificou-se que, embora presente, a integração disciplinar ainda ocorre de forma parcial na referida instituição, não tendo ainda alcançado a totalidade do potencial a ela reservado entre as disciplinas de música.
586

Aprendizado musical e referenciais doutrinários: a construção da performance em um coro religioso

SILVA, Bianca Almeida e 28 March 2011 (has links)
Made available in DSpace on 2014-07-29T16:25:13Z (GMT). No. of bitstreams: 1 Dissertacao Bianca Almeida e Silva - Texto.pdf: 1750480 bytes, checksum: 0a8ced986f81b5aa267f7747afc332b5 (MD5) Previous issue date: 2011-03-28 / Este estudo enfoca o aprendizado musical em corais religiosos como fruto da conjugação das vivências artística e ideológica, contribuindo para o aprofundamento da experiência humana e estética do grupo. Utilizando o método pesquisa-ação, essetrabalhodescreve ametodologia aplicada em um grupo religioso de Goiânia, o Coral Vida e Luz, da Irradiação Espírita Cristã, que possibilitou o desenvolvimento de um amplo fazer artístico e musical, avaliando a sua contribuição para a (trans) formação educativa e humanitária dos envolvidos. Uma parte substancial das informações recolhidas foifruto da observaçãodiretados resultados obtidos em ensaios e apresentações, bem como de entrevistas gravadas e de questionários aplicados, estruturados e semi-estruturados. Foi possível comprovar que, com um trabalho planejado, focado no conteúdo doutrinário e musical do repertório, a conexão com o público se torna muito mais sólida, possibilitando ao grupo cumprir sua tarefa transformadora na sociedade.
587

Coral Meninas Cantoras de Porto Murtinho: um estudo do timbre nas inter-relações com as identidades culturais e a sociedade / Coral Meninas Cantoras de Porto Murtinho: a study of tone in interrelations chip with cultural identies and society

Passos, Cristina Maria Albuquerque 24 April 2013 (has links)
Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2014-08-21T11:50:15Z No. of bitstreams: 2 license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Dissertação CRISTINA PASSOSCORAL_MENINAS_CANTORAS_DE_P.pdf: 617739 bytes, checksum: 6fc0de610636605cfd28855578febef1 (MD5) / Made available in DSpace on 2014-08-21T11:50:15Z (GMT). No. of bitstreams: 2 license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Dissertação CRISTINA PASSOSCORAL_MENINAS_CANTORAS_DE_P.pdf: 617739 bytes, checksum: 6fc0de610636605cfd28855578febef1 (MD5) Previous issue date: 2013-04-24 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / This research aims at the investigation of the timbre in the interrelation of Cultural Identities with the Society, in a case study of Choir Meninas Cantoras de Porto Murtinho. Located at the border between Paraguay and Mato Grosso do Sul, Porto Murtinho is characterized by the contact of three cultures of different origins, which is materialized in the use of three languages. With an interdisciplinary approach, based on the cultural history of social sciences, of the voice and the singing, this research relates Music, Culture and Society. This work is founded on participant observation, with qualitative approach, comparing and presenting the singing of the girls before and after the vocal work as well as questionnaires and interviews with professionals, choir participants and community members. During the analysis it remains clear the feedback between the objects studied, tone, identities, culture, choir and society, and their representations, that promote changes in the lives of the girls. Out of this study emerges the importance of the relationship between tone and cultural identities. / A presente pesquisa tem como objetivo investigar o timbre nas inter-relações das Identidades Culturais com a Sociedade, num estudo de caso do Coral Meninas Cantoras de Porto Murtinho. Situada na fronteira entre o Paraguai e o Mato Grosso do Sul, Porto Murtinho é marcada pelo contato entre três culturas de origens distintas, o que se manifesta no uso de três idiomas na região. Com abordagem interdisciplinar, a partir da história cultural, das ciências sociais, da voz e do canto, a pesquisa relaciona Música, Cultura e Sociedade. Este trabalho fundamenta-se na observação participante, com abordagem qualitativa, utilizando a comparação e apresentando o canto das meninas antes e depois do trabalho vocal, além de questionários e entrevistas com profissionais, participantes do coral e membros da comunidade. No decorrer da análise fica evidente o processo retroalimentar existente entre os objetos estudados, timbre, identidades, cultura, coral e sociedade, e suas representações, que promovem transformações nas vidas das meninas cantoras. Deste estudo emerge a importância da relação entre timbre e identidades culturais.
588

Anel?deos Polychaeta associados a bancos de corais de profundidade da Bacia de Campos ? Rio de Janeiro, Brasil / Polychaeta associated with deep-sea coral reefs from Campos Basin, Rio de Janeiro, Brasil

Miranda, Vin?cius da Rocha 26 June 2013 (has links)
Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2017-04-04T11:10:45Z No. of bitstreams: 1 2013 - Vin?cius da Rocha Miranda.pdf: 4210864 bytes, checksum: 3c37254eedb367413a77718eae172a75 (MD5) / Made available in DSpace on 2017-04-04T11:10:45Z (GMT). No. of bitstreams: 1 2013 - Vin?cius da Rocha Miranda.pdf: 4210864 bytes, checksum: 3c37254eedb367413a77718eae172a75 (MD5) Previous issue date: 2013-06-26 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / Cold-water coral reefs are of great ecological importance, they can support a great diversity associated with. They can offer a sheltered, three-dimensional, micro-habitat to many species. Studies involving the Brazilian deep-sea coral reefs, and the fauna which composes it, are recent and still scarce. These reefs were studied only in terms of the species of coral which composes it and their distribution in our coast, as the benthic fauna which are associated with this environment. Two projects, CAP-BC and ECOPROF, coordinated by CENPES/PETROBRAS, surveyed the Campos Basin (located at the northeast of Rio de Janeiro) with the objective of studying this environment and the associated fauna. On each project samples of the reef-building corals were collected with a ROV, at depths from 245 to 1100m. Five species of coral were surveyed: Solenosmilia variabilis Duncan, 1873, Lophelia pertusa (Linnaeus, 1758), Enallopsammia rostrata (Portual?s, 1758), Madrepora oculata Linnaeus, 1758 and Errina sp.,and fixed in formalin 10% and sorted at the laboratory. Here in, we present the first, qualitative, results from the polychaetes found in association with the coral reefs in Campos BasinThe specie of Eunice prognatha McIntosh, 1885 were the most abundant, followed by Harmothoe gilchristi (Day, 1960) and Nicon maculata Kimberg, 1866. The majority of polychaetes were found associated to the coral S. variabilis, followed by E. profunda and L. pertusa, both M. oculata and Errina sp. were the corals with less associated polychaetes. Five new species of Polychaeta are reported: Harmothoe sp. (Polynoidae), Pholoides sp. (Sigalionidae), Leocratides sp. (Hesionidae), Euchone sp. (Sabellidae) and Ophryotrocha sp. (Dorvilleidae).Specimens identified as Glycerella magellanica (McIntosh, 1885), Harmothoe gilchristi (Day, 1960), Eunice gracilicirrata (Treadwell, 1922), Eunice prognatha McIntosh, 1885, Pionosyllis procera Hartman, 1965, Haplosyllis ohma (Imajima & Hartman, 1964) and Nicon maculata Kimberg, 1866, are new occurrence for the Brazilian coast. Two other species, Filogranula revizee Nogueira & Abbud, 2009 and Notopygos crinita Grube, 1855had their range of occurrence extended. This is the first study aiming on the polychaetes associated with deep sea corals in the Brazilian waters, further studies should be conducted to better understand the distribution of species described here in, as well as to better understand the polychaete assemblage associated with each species of coral. / Recifes de corais de profundidade possuem uma grande import?ncia ecol?gica, uma vez que podem abrigar uma grande diversidade de esp?cies associadas. Isso ? poss?vel gra?as ? sua conforma??o tridimensional que proporciona uma alta hetereogenidade espacial, criando um ambiente protegido para muitas esp?cies. No Brasil, estudos sobre corais. de profundidade, s?o escassos e recentes. Muitos destes se limitam a descrever as esp?cies de corais encontradas e a sua distribui??o pela costa brasileira assim como organismos bent?nicos associados a eles. Recentemente foram realizados dois projetos coordenados pela CENPES/PETROBRAS, CAP-BC e ECOPROF com objetivo de realizar um levantamento dos recifes de corais de profundidade, bem como das esp?cies associadas a estes, na regi?o da Bacia de Campos (noroeste do estado do Rio de Janeiro). Em cada um desses projetos foi utilizado um ROV para coletar amostras nas profundidades entre 300 e 1100 metros. Cinco esp?cies de corais formadores desse ecossistema foram coletadas: Solenosmilia variabilis Duncan, 1873, Lophelia pertusa (Linnaeus, 1758), Enallopsammia rostrata (Portual?s, 1758), Madrepora oculata Linnaeus, 1758 and Errina sp., cada amostra foi fixada em uma mistura tamponada de formalina (10%), para posterior triagem em laborat?rio. Aqui apresentamos o estudo dos poliquetas associados a estes corais na Bacia de Campos. A esp?cie Eunice prognatha McIntosh, 1885 foi a mais abundante, seguida por Harmothoe gilchristi (Day, 1960) e Nicon maculata Kimberg, 1866. O coral S. variabilis foi o que apresentou o maior n?mero de esp?cies associadas, seguida dos corais E. rostrata e L. pertusa, j? as esp?cies M. oculata e Errina sp. foram os corais com menos esp?cies de poliquetas encontrados. Foram reportadas cinco novas esp?cies de poliquetas Harmothoe sp. (Polynoidae), Pholoides sp. (Sigalionidae), Leocratides sp. (Hesionidae), Euchone sp. (Sabellidae), e Ophryotrocha sp. (Dorvilleidae). O total de oito esp?cies foram registradas pela primeira vez para a costa brasileira: Glycerella magellanica (McIntosh, 1885), Harmothoe gilchristi (Day, 1960), Eunice gracilicirrata (Treadwell, 1922), Eunice prognatha McIntosh, 1885, Pionosyllis procera Hartman, 1965, Haplosyllis ohma (Imajima & Hartman, 1964), e Nicon maculata Kimberg, 1866. Duas outras esp?cies, viii Filogranula revizee Nogueira & Abbud, 2009 e Notopygos crinita Grube, 1855, tiveram suas ?reas de ocorr?ncia ampliadas. Este ? o primeiro estudo focando nos poliquetas associados aos corais de profundidade da costa brasileira. Novos estudos devem ser realizados para melhor compreender a distribui??o das esp?cies descritas neste trabalho, assim como entender as poss?veis associa??es destas com as esp?cies de coral desse ecossistema
589

Behaviour of settling coral reef fishes and supplementary management tools

Heenan, Adel January 2010 (has links)
Coral reef fish larvae take an active role in selecting their settlement site and sensory cues may help them to orientate during this process. As settlement is a period of transition through which the majority of individuals do not survive, it is often a focal point for the management of coral reef populations, which are of high conservation concern. In this thesis, I used choice tests and in situ techniques to assess the response of settlement-stage larvae to a range of odour, light and acoustic cues and I found that larvae are more selective in their response to sensory stimuli than previously thought. Micro-habitat odours are not likely to be used during settlement orientation, and odour cues may be used to avoid inappropriate settlement sites. The photopositive behaviour of larval fish is likely to match their spectral sensitivity but this proved difficult to assess in situ because of the high amount of spatial and temporal variation in larval distribution. The positive response of settlement-stage fish to played back reef noise is location specific as well as being highly specific to the reef sound recording. To understand whether it might be the composition of reef sound that drives the selective response of larvae to acoustic cues, I took sound recordings while collecting visual data on fish diversity and the behavioural activity of a sound producing, or soniferous, fish species. I found that the variation in intensity of reef noise matches the activity patterns of a soniferous species, and when reef noise is most intense is when visual estimates on the diversity of the reef fish assemblage are decreased. This information provides the basis for understanding how changes in the reef soundscape may effect larval recruitment and has exciting implications for using sound recordings as a method to monitor coral reefs. Finally, I tested the viability of releasing reared larvae to boost depleted populations and found that collecting and holding settlement-stage fish for a week can increase survival, relative to natural settlement. These data demonstrate that applying our knowledge of the settlement behaviour of coral reef fish will make a significant contribution to developing tools for management.
590

Música na escola: o canto coral, possibilidades e limites

Ribeiro, Jucélia Cristina 28 February 2012 (has links)
Submitted by maria oliveira (maria.oliveira@utp.br) on 2018-06-18T16:42:00Z No. of bitstreams: 1 MUSICA NA ESCOLA.pdf: 47303801 bytes, checksum: af9e9c6f32cb45ccb70026419d4f4e9b (MD5) / Made available in DSpace on 2018-06-18T16:42:00Z (GMT). No. of bitstreams: 1 MUSICA NA ESCOLA.pdf: 47303801 bytes, checksum: af9e9c6f32cb45ccb70026419d4f4e9b (MD5) Previous issue date: 2012-02-28 / La pesquisa tiene como objeto de estudio Ia música en Ia escuela, especificamente sobre sus manifestaciones en Ias prácticas de canto coral y su relación en el desenvolvimiento humano de nifíos y adolecentes. Se objetivo investigar Ias posibilidades y límites de Ia educación musical en Ia escuela, a partir de una análisis de los documentos legales y curriculares que orientan Ia ensefíanza de Ia música y Ia formación de los profesores. Se comprende Ia música como mediadora de Ia práctica social y dei proceso de desarrolIo humano. La música constituye un atractivo potencial para Ia actividad humana, a partir de Ia criación musical como producción social culturalmente producida. Se estudia el objeto de Ia pesquisa a partir de Ia perspectiva sócio-histórica deI desarrolIo humano de Ia Psicología, que comprende el hombre en su totalidad concreta, como sujeto histórico y relacional, que sintetiza sus experiencias y conocimientos, fruto de funciones superiores psíquicas que le permiten apropriarse de Ia producción humana y integrar su consciencia en una dinâmica progresiva de reflexión afectiva y cognitiva de Ias propias experiencias. En esa perspectiva fueron analisados criticamente tanto el proyecto de Villa-Lobos y Ia concepción de Snyders sobre Ia ensefianza de Ias alegrias de Ia música. Se percibió que el proyecto de canto orfeônico de Vi lIa-Lobos, aunque centralizado en Ia ensefíanza de Ia música, sirvió como medio de comunicación ideológica dei Estado. En el caso de Ia propuesta de Snyders se considera que aunque el autor presente una fundamentación teórica sobre Ias alegrias de Ia música en Ia perspectiva de Ia pedagogia progresista falta un análisis concreto sobre Ia realidad y Ias relaciones sociaIes que determinan el proceso de Ia actividad musical. Con base en eso, se estudiaron Ias políticas públicas para Ia ensefíanza musical en Ias escuelas, de Ias posibilidades materiales y de Ia formación de los profesores, frente a los desafios de Ia da Lei n" 11.769 de 2008, ley de Ia obligatoriedad de Ia oferta de los contenidos de música en Ias escuelas públicas. Así, Ia disertación con tituye una posibiIidad de reflexión deI movimiento educativo-musical em Ia história de Ia educación brasilefía, principalmente a 10 que se refiere a Ia ensefíanza de música deI canto coral. Palavras-chave: Ensefíanza de Música. Canto Coral. Lei n. 11.769/2008. / A pesquisa tem como objeto de estudo a música na escola, especificamente sobre suas manifestações nas práticas de canto coral e sua relação no desenvolvimento humano de crianças e adolescentes. Objetiva-se investigar as possibilidades e limites da educação musical na escola, através da análise dos documentos legais e curriculares que orientam o ensino da música e a formação dos professores. Compreende-se a música como mediadora da prática social e do processo de desenvolvimento humano. A música constitui um atrativo potencial para a atividade humana, a partir da criação musical como produção social culturalmente produzida. Estuda-se o objeto da pesquisa a partir da perspectiva sócio-histórica do desenvolvimento humano da Psicologia, que compreende o homem na sua totalidade concreta, como sujeito histórico e relacional, que sintetiza suas experiências e conhecimentos, fruto de funções superiores psíquicas que lhe permitem apropriar-se da produção humana e integrar a sua consciência numa dinâmica progressiva de reflexão afetiva e cognitiva das próprias experiências. Nessa perspectiva foram analisados criticamente tanto o projeto de VilIa-Lobos e a concepção de Snyders sobre o ensino das alegrias da música. Percebeu-se que o projeto de canto orfeônico de Villa-Lobos, ainda que centrado no ensino da música, serviu como meio de comunicação ideológica do Estado. No caso da proposta de Snyders considera-se que ainda que o autor apresente uma fundamentação teórica sobre as alegrias da música na perspectiva da pedagogia progressista, falta uma análise concreta sobre a realidade e as relações sociais que determinam o processo da atividade musical. Com base nisso, estudaram-se as políticas públicas para o ensino de música nas escolas, das possibilidades materiais e da formação dos professores, frente aos desafios da Lei n° 11.769 de 2008, lei da obrigatoriedade da oferta dos conteúdos de música nas escolas públicas. Assim, a dissertação constitui uma possibilidade de reflexão do movimento educativo-musical na história da educação brasileira, principalmente no que se refere ao ensino de música do canto coral

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