Academic literature on the topic 'Jardins de coraux'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Jardins de coraux.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Jardins de coraux"

1

Rapoport, Paul. "Sorabji Piano Music." Tempo 59, no. 232 (April 2005): 55–56. http://dx.doi.org/10.1017/s0040298205250155.

Full text
Abstract:
SORABJI: Two Piano Pieces; Fantaisie espagnole; Valse-Fantaisie: Hommage à Johann Strauss; Three Pastiches; Le jardin parfumé; Nocturne Jami; Gulistan; Introito and Preludio corale from Opus clavicembalisticum; Prelude, Interlude, and Fugue; Fragment for Harold Rutland; Fantasiettina sul nome illustre dell'egregio poeta Christopher Grieve ossia Hugh M'Diarmid; Quære reliqua hujus materiei inter secretiora; St. Bertrand de Comminges: ‘He was Laughing in the Tower’. HABERMANN: À la manière de Sorabji: ‘Au clair de la lune’. Michael Habermann (pno). BMS 427CD–429CD (3-CD set).SORABJI: Piano Sonata No. 4. Jonathan Powell (pno). Altarus AIR-CD-9069(1)–9069(3) (3-CD set priced as 2).
APA, Harvard, Vancouver, ISO, and other styles
2

Hernández Fernández, Leslie, Mayrene Guimarais Bermejo, Rodolfo Arias Barreto, and Lídice Clero Alonso. "COMPOSICIÓN DE LAS COMUNIDADES DE OCTOCORALES Y CORALES PÉTREOS Y LA INCIDENCIA DEL BLANQUEAMIENTO DEL 2005 EN JARDINES DE LA REINA, CUBA." Revista Ciencias Marinas y Costeras 3 (December 31, 2011): 77. http://dx.doi.org/10.15359/revmar.3.6.

Full text
Abstract:
En los años 2001 y 2005, se estudió la composición de las comunidades de octocorales y corales pétreos en el archipiélago de los Jardines de la Reina. Se analizó, en la comunidad de corales pétreos, la incidencia del blanqueamiento ocurrido en el 2005 en el Caribe. Para ello se establecieron doce estaciones de muestreo (siete en el arrecife frontal somero y cinco en el arrecife de cresta), en cada una de estas se estimó la densidad mediante el marco cuadrado de 1 m de lado. En el arrecife frontal somero se identificaron un total de 62 especies (26 de octocorales y 36 de corales), siendo las más abundantes: Pseudopterogorgia americana (2.4 colonias/m2), Eunicea flexuosa (1.1 colonias/m2), Siderastrea siderea (5.0 colonias/m2) y Agaricia agaricites (4.0 colonias/m2). En el arrecife de cresta se identificaron un total de 31 especies (13 de octocorales y 18 de corales), predominando: Briareum asbestinum (1.3 colonias/m2), Porites astreoides (2.5 colonias/m2) y Millepora complanata (1.0 colonias/m2). Las especies más sensibles al blanqueamiento fueron: A. agaricites , Millepora spp. y Montastraea annularis. En sentido general, dicho suceso tuvo una incidencia pobre sobre los corales pétreos. Es menester la ejecución de monitoreos al permitir ajustar los planes de manejo en función de los cambios que puedan ocurrir en la estructura de las comunidades bentónicas.ABSTRACT Octocoral and stony coral communities in the Jardines de la Reina archipelago (Cuba) were studied in 2001 and again in 2005. The incidence of the 2005 bleaching event in the Caribbean was analyzed in the stony coral community. Twelve sampling stations were established: seven in the shallow forereef and five in reef crests, with one square meter quadrants to estimate density. A total of 62 species (26 octocorals and 36 stony corals) were identified in the shallow forereef, including Pseudopterogorgia americana (2.4 colonies/m2), Eunicea flexuosa (1.1 colonies/m2), Siderastrea siderea (5.0 colonies/m2) and Agaricia agaricites (4.0 colonies/m2). In the reef crest, 31 species were identified (13 octocorals and 18 stony corals), with Briareum asbestinum (1.3 colonies/m2), Porites astreoides (2.5 colonies/m2) and Millepora complanata (1.0 colonies/m2) being the most abundant. The most sensitive species to bleaching were: A. agaricites, Millepora spp. and Montastraea annulariS. In general, this event showed a poor incidence with stony corals. Constant monitoring is necessary to adjust the management plan to the changes that may occur in the structure of the benthic communities.
APA, Harvard, Vancouver, ISO, and other styles
3

Rahman, Ishraq, Al-Hussain Ali Al-Bar, Florina Stephanie Richard, Moritz Müller, and Aazani Mujahid. "Chemotactic response of Vibrio coralliilyticus to mucus from various coral species." Canadian Journal of Microbiology 67, no. 7 (July 2021): 548–52. http://dx.doi.org/10.1139/cjm-2020-0287.

Full text
Abstract:
Vibrio coralliilyticus, a prominent pathogenic bacteria, is known to cause tissue damage in the coral Pocillopora damicornis and is attracted towards the coral via chemotaxis. However, the potential of V. coralliilyticus to infect most of the other coral hosts via chemotaxis is unknown. In this study, we used capillary assays to quantify the chemotactic response of V. coralliilyticus to the mucus of four tank-cultivated coral species (Cataphyllia jardine, Mussidae sp., Nemenzophyllia turbida, and Euphyllia ancora), and mucus from three wild coral species (Acropora sp., Porites sp., and Montipora sp.). The bacteria showed a positive chemotactic response to each coral mucus tested, with the highest response recorded to the mucus of Acropora sp. and the lowest response to the mucus of Montipora sp. A microfluidic chip was then used to assess the chemotactic preference of V. coralliilyticus to the mucus of the tank cultivated corals. Here too, the bacterium showed positive response, but with a slightly different ranking order. The strong chemotactic response of V. coralliilyticus towards the mucus tested could indicate a broader host range of V. coralliilyticus, and by extension, indicate a threat to weakened coral reefs worldwide.
APA, Harvard, Vancouver, ISO, and other styles
4

Prestel, A. "Moshe Jarden and Ursel Kiehne. The elementary theory of algebraic fields of finite corank. Inventiones mathematicae, vol. 30 no. 3 (1975), pp. 275–294." Journal of Symbolic Logic 52, no. 2 (June 1987): 567. http://dx.doi.org/10.1017/s0022481200034599.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Krugliak, A. P., T. O. Krugliak, and A. A. Kirii. "Methodical aspects of the montbeliarde breed gene pool in Ukraine creation." Animal Breeding and Genetics 55 (May 15, 2018): 83–90. http://dx.doi.org/10.31073/abg.55.11.

Full text
Abstract:
The methodical aspects of the Montbeliarde breed gene pool in Ukraine are presented. The evaluation and selection of animals was carried out on the basis of the dairy productivity and tribal value of the ancestors, the type of exteriors, the overall development of the body, the period of cohort, and also the parentage. Selected and brought 100 heads of the cows of the Monglereid breed. As a result of growth, development, the type of body structure, the animals corresponded to the standard of breed requirements and were pregnant for 3–4 months. The parents type productivity indices (ISU) was 98–147. More than 50% of them were ranked in the top 20 best breeders. The milk productivity of the heifers mathers on 305 days of the first lactation ranged from 5300 to 9100 kg of milk, with a fat content of 3.9–4.4% and a protein of 3.3–3.7%.Genealogical structure of the herd (100 cows and 64 heifers, which were obtained at the farm PLAE "Zhatkivske") is represented by 5 genealogical bloodlines. The most numerous is the bloodline Charmant – Ideal – Helios 15.421 (26 cows and 13 heifers). The Charvant sire was quite widely used in the breeding stock virtually of all bloodlines. This line is developed through the bulls Corail 3971002640, Cardian 7191071104106 and Isangrin 6393018001 (scheme 1). No less numerous is the Pirates 11,695 (25 caws and 6 heifers) bloodline, which has two powerful sublines: Novac 17136 and Tabarin 3967923962. The development of these independent branches continues through the bulls: Rhum 7080007171, Ezozo 0189014533 Martien 7176060311 Cantadou, Verglas 3984014417, Leguyer 7495022208, Bois Levin 0186006232.From the genealogical bloodline Oceano 11594 have been 23 caws selected, from which already 13 heifers were received. The bloodline has been developed through the bulls: Faucon 3990016792, Natif 3997030107, Oxalin 2598012281. Oxbou. Based on the old bloodline Ideal 9128, a new bloodline Osiris – Orkan 78315, is developed through the bulls: Lusignan, Jardin 2574010156, Tilleul 3912920526, Boulogne 7086000198 and represented by 15 individuals.The most numerous in the past century in the breed, the Bravo 12.571 bloodline has narrowed significantly and is currently developing only through the branch Debount 2572016541, his sons: Tafia 2582003300 and Tartars 7082004021 and their grandsons: Polichinel 2199011839, Maldini 1596099083 and others. At the moment, it's a disappearing bloodline, so the best bulls as Ezozo 0189014533, Bois Le Vin 0186006232 and the most promising bulls from Pirate 11.695 bloodline are used widely on the cows of this line. The farm brought 6 heavens of this line, from which 3 daughters were taken. In order to prevent the rapid growth of inbreeding, in recent years, in the breed used cross the most distant lines. The average expectation of 31 firstborns for 305 days of lactation in the PLAE "Zhatkivske" was 7298 (limits 6544–8839) kg.Thus, the breeding stock imported into the PLAE "Zhatkivskoe" is rather high-yielding and reflects the gene pool of the Monglereid breed. A plan for individual fixation, which is implemented in the herd, is developed to provide linear breeding, which in the complex forms the basis for the creation of the Monglereid breeder.
APA, Harvard, Vancouver, ISO, and other styles
6

Babbin, Andrew R., Tyler Tamasi, Diana Dumit, Laura Weber, María Victoria Iglesias Rodríguez, Sarah L. Schwartz, Maickel Armenteros, Scott D. Wankel, and Amy Apprill. "Discovery and quantification of anaerobic nitrogen metabolisms among oxygenated tropical Cuban stony corals." ISME Journal, December 20, 2020. http://dx.doi.org/10.1038/s41396-020-00845-2.

Full text
Abstract:
AbstractCoral reef health depends on an intricate relationship among the coral animal, photosynthetic algae, and a complex microbial community. The holobiont can impact the nutrient balance of their hosts amid an otherwise oligotrophic environment, including by cycling physiologically important nitrogen compounds. Here we use 15N-tracer experiments to produce the first simultaneous measurements of ammonium oxidation, nitrate reduction, and nitrous oxide (N2O) production among five iconic species of reef-building corals (Acropora palmata, Diploria labyrinthiformis, Orbicella faveolata, Porites astreoides, and Porites porites) in the highly protected Jardines de la Reina reefs of Cuba. Nitrate reduction is present in most species, but ammonium oxidation is low potentially due to photoinhibition and assimilatory competition. Coral-associated rates of N2O production indicate a widespread potential for denitrification, especially among D. labyrinthiformis, at rates of ~1 nmol cm−2 d−1. In contrast, A. palmata displays minimal active nitrogen metabolism. Enhanced rates of nitrate reduction and N2O production are observed coincident with dark net respiration periods. Genomes of bacterial cultures isolated from multiple coral species confirm that microorganisms with the ability to respire nitrate anaerobically to either dinitrogen gas or ammonium exist within the holobiont. This confirmation of anaerobic nitrogen metabolisms by coral-associated microorganisms sheds new light on coral and reef productivity.
APA, Harvard, Vancouver, ISO, and other styles
7

Rahman, Ishraq, Al-Hussain Ali Al-Bar, Florina Stephanie Richard, Aazani Mujahid, and Moritz Müller. "Chemotactic Response of Vibrio coralliilyticus to mucus from various coral species." Canadian Journal of Microbiology, January 8, 2021. http://dx.doi.org/10.1139/cjm-2020-0287.

Full text
Abstract:
<i>Vibrio coralliilyticus</i>, a prominent pathogenic bacteria, is known to cause tissue damage in the coral <i>Pocillopora damicornis</i> and is attracted towards the coral via chemotaxis. However, the potential of <i>V. coralliilyticus</i> to infect most of the other coral hosts via chemotaxis is unknown. The present study used capillary assays to quantify the chemotactic response of <i>V. coralliilyticus</i> to the mucus of four tank-cultivated corals, <i>Cataphyllia jardine</i>, <i>Mussidae</i> sp., <i>Nemenzophyllia turbida </i>and <i>Euphyllia ancora</i> and mucus from three wild corals, <i>Acropora</i> sp., <i>Porites</i> sp. & <i>Montipora</i> sp. The bacteria showed positive chemotactic response to each coral mucus tested, with the highest response recorded to the mucus of <i>Acropora</i> sp and the lowest response to the mucus of <i>Montipora</i> sp. A microfluidic chip was then used to assess the chemotactic preference of <i>V. coralliilyticus </i>to the mucus of the tank cultivated corals. Here too, the bacteria showed positive response with a slightly different ranking order. The strong chemotactic response of <i>V. coralliilyticus</i> towards the mucus tested could indicate a broader host range of <i>V. coralliilyticus</i> and in extension its threat to weakened coral reefs worldwide.
APA, Harvard, Vancouver, ISO, and other styles
8

Duarte, M. R., G. Golambiuk, and R. E. Costa. "ILUSTRAÇÃO DE CARACTERES MICROSCÓPICOS DE DROGAS VEGETAIS PARA O CONTROLE DE QUALIDADE FARMACOGNÓSTICO. IV. JABORANDI (Pilocarpus pennatifolius LEM., RUTACEAE)." Visão Acadêmica 10, no. 2 (December 31, 2009). http://dx.doi.org/10.5380/acd.v10i2.21329.

Full text
Abstract:
O presente trabalho faz parte de uma série de publicações deste periódico, que ilustram os caracteres microscópicos de drogas vegetais, como recurso didático e complementar à descrição anatômica. A espécie em questão é Pilocarpus pennatifolius Lem., uma das várias Rutaceae conhecidas como jaborandi. A parte usada é a folha composta ou as subunidades, denominadas de folíolos, que são ricos em alcaloides imidazólicos, principalmente pilocarpina. Amostras de folhas adultas foram coletadas de exemplares identificados no Jardim Botânico Municipal de Curitiba. O material foi fixado em FAA, seccionado à mão livre ou emblocado em glicometacrilato, seccionado em micrótomo e corado. As ilustrações mostram folha hipoestomática, estômatos anomocíticos, cutícula estriada, tricomas tectores unicelulares, tricomas glandulares capitados pluricelulares, mesofilo dorsiventral, nervura central e peciólulo biconvexos em secção transversal, drusas de oxalato de cálcio e cavidades secretoras.
APA, Harvard, Vancouver, ISO, and other styles

Dissertations / Theses on the topic "Jardins de coraux"

1

Van, den Beld Inge. "Habitats coralliens dans les canyons sous-marins du Golfe de Gascogne : distribution, écologie et vulnérabilité." Thesis, Brest, 2017. http://www.theses.fr/2017BRES0017/document.

Full text
Abstract:
Les habitats de coraux d’eau froide formés par des scléractiniaires coloniaux, des gorgones, des antipathaires et des pennatules sont des hotspots de biodiversité et de biomasse. Ils fournissent des fonctions importantes, comme des refuges et des zones d’alimentation, pour d’autres organismes. Mais, ils sont également vulnérables aux activités humaines, parce qu’ils sont fragiles, croissent lentement et atteignent des records de longévité. Dans les canyons sous-marins, le relief tourmenté, l’hydrodynamisme et l’hétérogénéité des substrats offrent des conditions environnementales propices au développement des habitats coralliens. Dans le Golfe de Gascogne, les coraux d’eau froide sont connus depuis la fin du 19e siècle, mais leur distribution, leur densité et leur rôle fonctionnel avaient été très peu étudiés.Pour augmenter cette connaissance, 24 canyons sous-marins et 3 sites sur l’interfluve/haut de pente contiguë aux canyons adjacents ont été visités par un ROV et une caméra tractée pendant 46 plongées au cours de 7 campagnes océanographiques. Les habitats coralliens définis par le système de classification CoralFISH ont été cartographiés à partir des images prises par les engins sous-marins puis la faune associée, les types de substrat et les déchets ont été annotés.Onze habitats coralliens et 62 morphotypes de coraux ont été observés dans les canyons sous-marins du Golfe de Gascogne hébergeant 191 morphotypes de faune associée, dont 160 morphotypes uniques. Les patrons de distribution à l’échelle locale et à l’échelle régionale pourraient être liés aux régimes hydrodynamiques et sédimentaires. Le type de substrat était important pour les assemblages de coraux et leurs faunes associées, distinguant les habitats biogéniques, sur substrat dur et sur substrat meuble. Les assemblages de coraux étaient similaires entre habitats biogéniques et habitats sur substrat dur, mais la faune associées était plus abondante et diversifiée sur les habitats biogéniques. La diversité-alpha, -beta et –gamma étaient étonnement élevée sur les habitats coralliens sur substrat meuble, égalant ou dépassant la diversité des habitats biogéniques.Les déchets marins étaient abondants et principalement composés de plastiques et de matériels de pêche. Ces déchets pourraient impacter les habitats coralliens : ils ont été trouvés à des profondeurs similaires et les déchets étaient piégés par des reliefs créés par des structures biologiques et géologiques. L’ocurrence des récifs de coraux préférentiellement sur les pentes plus abruptes des canyons sous-marins tandis que les débris de coraux sont plus fréquents sur des aires plus plates de l’interfluve ou du haut de pente, pourraient indiquer un impact de la pêche.Cette étude a contribué à l’initiative en cours de création d’un réseau Natura 2000 qui protégera à terme l’habitat « récif » dont les habitats coralliens biogéniques et sur substrat dur, mais pas les habitats coralliens sur substrat meuble. Pour ces derniers, un complément d’étude et d’autres stratégies de préservation seront nécessaires
Cold-water coral (CWC) habitats formed by colonial scleractinians, gorgonians, antipatharians and sea pens are biodiversity and biomass hotspots that provide important functions, such as shelter and feeding grounds, to other organisms. But, they are also vulnerable to human activities, because they are long-lived, grow slowly and have a low resistance. Submarine canyons may offer the environmental conditions needed for CWC habitat development, due to their steep topography, complex hydrodynamics and substrate heterogeneity. In the Bay of Biscay, which margin is incised by hundreds of canyons, CWCs are known to exist since the late 19th century, but their distribution, density and functional role remained largely unknown, which impaired their preservation.To increase this knowledge, 24 canyons and three locations between adjacent canyons were visited with an ROV and a towed camera system during 46 dives on 7 cruises. Images were analysed for CWC habitats using the CoralFISH classification system. Within these habitats, corals, associated fauna were identified and substrate cover measured. Litter was identified in 15 out of 24 canyons.Eleven coral habitats constructed by 62 coral morphotypes were observed in the canyons of the Bay of Biscay hosting 191 associated megafaunal morphotypes, including 160 unique morphotypes. The distribution patterns at regional and local scales could be linked to hydrodynamics and sedimentary regimes. Substrate type was an important driver for coral and associated faunal assemblages, distinguishing biogenic, hard substrate and soft substrate habitats. Coral assemblages were similar between biogenic and hard substrate habitats, but the associated fauna was more abundant and diverse on biogenic habitats. The alpha, beta and gamma diversity was surprisingly high on soft substrate habitats, equalling or exceeding that of biogenic habitats.Marine litter was abundant and was mainly composed of plastic items and fishing gear. Litter could co-occur with CWCs and impact them: litter and most CWC habitats were observed at similar water depths and litter was more abundant in areas with a seafloor relief created by biological or geological features. Observations of coral reefs on steeper areas in the canyons and coral debris on flatter areas on the interfluve/upper slope may indicate a potential impact of the fishing industry. This study supports the ongoing effort to create a Natura 2000 network that will protect biogenic and hard substrate habitats, but also points out the need to develop a framework for the preservation of coral habitats on soft substrate
APA, Harvard, Vancouver, ISO, and other styles
2

Dias, Vítor Hugo Ferreira. "Another brick in the restoration of gorgonians: assessment of coral bycatch in artisanal fisheries and its potential for restoration actions." Master's thesis, 2020. http://hdl.handle.net/10400.1/15536.

Full text
Abstract:
Os jardins de coral e corais de águas frias (CWCs) são definidos como agregados relativamente densos de uma ou de várias espécies de coral que fazem parte de vários grupos taxonómicos, incluindo escleractínios (Scleractinia), corais negros (Antipatharia), corais moles (Alcyonacea) e penas-do-mar (Pennatulacea). Muitas destas espécies são engenheiros de ecossistemas, pois para além de criarem habitat, tais organismos também são capazes de alterar fatores bióticos e abióticos, possibilitando assim a colonização dos habitats bentónicos por outros organismos o que faz com que sejam muito importantes. Os corais também representam habitat essencial para muitas espécies de peixes e crustáceos que, em alguns casos, são explorados comercialmente. Outro dos serviços que estes habitats nos dão é relativo a materiais, para joias como é o caso do coral vermelho (Corallium rubrum) ou mesmo a nível da medicinal como a espécie Sarcodictyon roseum, em que alguns dos seus compostos estão a ser usados em ensaios clínicos para combater o cancro. Infelizmente, estes magníficos ecossistemas enfrentam imensas ameaças associadas às atividades humanas. Desde 2004, os jardins de coral e CWCs são considerados ecossistemas marinhos vulneráveis (VMEs). Os VMEs são definidos como espécies ou habitats que são raros ou únicos e que apresentam uma complexidade estrutural e funcional significativa, enquanto apresentam uma probabilidade limitada de recuperação aos impactos a que estão sujeitos. Tais atividades humanas incluem derrames de petróleo, acidificação dos oceanos e o impacto causado pelas pescas. Este último é, sem dúvida, o impacto mais preocupante e mais devastador principalmente por causa dos arrastos de fundo. Apesar de já existirem muitos estudos efetuados sobre os impactos da pesca em jardins de coral e CWCs, a sua maioria foca-se na pesca industrial como o caso dos arrastos. Como resultado, sabe-se muito pouco sobre os impactos causados pelas pescas artesanais (i.e. armadilhas, covos e redes de tresmalho e de emalhar) nestes habitats, apesar de representar 84% e 90% da frota pesqueira na Europa e mundo, respetivamente. Para combater os diversos impactos que afetam os ecossistemas de coral, já foram implementadas várias medidas, tais como criação de áreas marinhas protegidas (MPAs), o fecho temporário da pesca em algumas zonas e outras medidas relacionadas com as pescas, como a proibição de arrastos a profundidades inferiores a 800m instituída na Europa. Visto que os jardins de coral e CWCs são tão importantes ecologicamente e são hotspots de biodiversidade, o interesse em implementar medidas de conservação e recuperação de habitats têm crescido nos últimos tempos. No entanto, o número de trabalhos desenvolvidos até ao momento com o objetivo de restaurar habitats de corais circalitorais e profundos é limitado, pois este tipo de restauração é monetariamente dispendioso uma vez que no geral requer o uso de tecnologia subaquática especializada visto que estes habitats ocorrem maioritariamente a profundidades abaixo dos 50m de profundidade. Como tal, os objetivos deste trabalho são: 1) documentar o impacto causado por redes de emalhar usadas pela pesca artesanal nos jardins de coral e CWCs ao largo de Sagres (Portugal); 2) identificar hotspots de biodiversidade de corais e de capturas acidentais pela pesca artesanal que possam constituir áreas de gestão prioritárias, assim como melhorar o conhecimento sobre a biodiversidade de corais que existem ao largo de Sagres; 3) testar a viabilidade de usar corais de zonas profundas apanhadas acidentalmente pela pesca artesanal para ações de recuperação de habitats pouco profundos; e 4) testar o efeito da densidade e da composição de espécies em transplantes de corais de modo a fornecer indicações para projetos de recuperação de corais futuros. Este estudo foi dividido em duas componentes científicas: a documentação do impacto causado por redes de emalhar ao largo da costa de Sagres (Capítulo 2) e o estudo piloto de recuperação de habitats de corais usando biomassa apanhada nas redes de emalhar (Capítulo 3). Para o Capítulo 2, foi seguida a atividade de uma embarcação pesqueira durante 42 dias, onde foi documentado todos os corais recolhidos, assim como os seus tamanhos e algumas variáveis adicionais como a profundidade, malhagem, localização das redes lançadas, espécie alvo e número de indivíduos capturados. Em 118 redes documentadas, foram recolhidos 4,326 fragmentos/colónias de coral pertencentes a 22 espécies, o que representa 13% das espécies conhecidas para esta área. Em média, foram recolhidos 31.1 (±2.7) corais em cada rede, onde o máximo observado foi de 144 corais numa única rede. Adicionalmente, em média foram recolhidas 4.31 (±0.2) espécies de coral em cada rede, atingindo um máximo de 10 espécies numa só rede. Os resultados, mostram que as comunidades de corais recolhidas, tal como as suas quantidades, estão relacionadas com a profundidade a que as redes foram lançadas. Foram ainda identificadas 4 áreas com grande biodiversidade e abundância de corais e que foram designadas de hotspots. Os resultados deste estudo indicam que o impacto causado por redes de emalhar em jardins de coral e CWCs é muito superior ao que se pensava anteriormente, e revela a necessidade de novas medidas de conservação e o uso de artes de pesca alternativas. Além destas medidas, o desenvolvimento de protocolos de captura acidental excessiva de corais em águas nacionais que imponha a obrigatoriedade de pescar noutra zona pode também ser uma alternativa de gestão viável. Globalmente, este estudo revela a grande biodiversidade de espécies de coral que existe nos jardins de coral e CWCs ao largo de Sagres, bem como o impacto potencialmente significativo que a pesca artesanal pode ter em certas áreas. Para o Capítulo 3 de recuperação de habitats de coral, foram utilizados 12 recifes artificias construídos com blocos de alvenaria para replantar um total de 90 colónias de coral provenientes de descartes da pesca artesanal e que foram instala 20m de profundidade. O desenho experimental incluiu 4 tratamentos diferentes, de acordo com os dois fatores definidos para o estudo, nomeadamente a densidade dos transplantes (10 colónias por m2 vs. 20 colónias por m2) e composição de espécies (mono-específico vs. multi-específico). A espécie Eunicella verrucosa foi usada para os tratamentos mono- e multi-específico e as espécies Leptogorgia sarmentosa e Paramuricea grayi para o tratamento multi-específico. Em média 78% (±4%) dos corais transplantados sobreviveram até 8 meses pós-transplantação. Os resultados mostraram que o tratamento multi-específico de baixa densidade teve a melhor taxa de sobrevivência (87%) apesar do efeito dos tratamentos experimentais não ter sido estatisticamente significativo. No geral, as taxas de sobrevivência para cada tratamento experimental diferiram entre espécies. A espécie com maior taxa de sobrevivência foi a E. verrucosa (82%), enquanto que a P. grayi e L. sarmentosa tiveram a mesma taxa de sobrevivência (67%). A níveis de crescimento, o estudo demonstra que em média não houve crescimento efetivo do comprimento total dos ramos dos corais (-0.32cm±5.97cm) durante os 8 meses de monitorização. Contudo, o potencial de crescimento é bastante elevado em todas as espécies estudadas com a observação de um aumento máximo do comprimento total dos ramos das colónias de 72.61cm, 21.90cm e 113.42cm para a E. verrucosa, P. grayi e L. sarmentosa, respetivamente. Estes resultados, demostram o elevado grau de dinamismo do crescimento das colónias de octocorais, que se partem e voltam a crescer com frequência e rapidez, visto que muitos dos transplantes deste estudo tiveram tal dinâmica. Os resultados também mostraram que o uso da métrica do tamanho total dos ramos parece ser melhor do que a altura máxima das colónias para detetar variações no crescimento de espécies com morfologia ramificada como é o caso dos octocorais. No geral, a metodologia usada neste estudo foi bem-sucedida, sendo que apenas 10% das colónias morreram nos primeiros 3 meses de monitorização, o que indica que a fixação das colónias não constitui uma limitação. No entanto, são necessários estudos adicionais para se perceber se o uso de recifes artificiais poderá ser usado com outras espécies, visto que a sensibilidade a manipulação e características biológicas varia de espécie para espécie. Os dois estudos apresentados aqui demonstram também a importância de colaborar com as comunidades pesqueiras, quer para melhorar o conhecimento sobre a distribuição das espécies de coral e os impactos a que estão sujeitas, quer para juntos proteger estas espécies vulneráveis.
Coral gardens and cold-water corals are key habitats for many marine organisms, providing several goods and services. Because of their ecological importance and susceptibility to degradation caused by human activities, these habitats are considered vulnerable marine ecosystems. Fisheries are likely the most destructive threat affecting these habitats and there is an urgent need to understand how different fishing gear affects them, as well as how to implement effective conservation and protection measures that mitigate these impacts. This study aims to provide baseline information on the impact of fisheries using bottom-set gillnet locally on coral assemblages, and to develop a time-effective and low-cost restoration pipeline for both deep- and shallow-water populations using coral bycatch. In order to assess the impact of bottom-set gillnet fisheries on coral assemblages, the fishing activity and coral bycatch of one vessel were documented over 42 days, determining coral composition, specimen size, fishing depth, location, number of fish caught, mesh size and soaking time for each net deployed. In total, 4,326 specimens of corals belonging to 22 different species of corals were collected from 118 bottom-set gillnets. Additionally, we report 4 hotspots of coral biodiversity. This study confirms anecdotal evidence on the destructive impact of bottom-set gillnets on benthic ecosystems, demonstrating that the impact is greater than previously observed. For the restoration component of the study, twelve artificial reefs were used to transplant 90 corals obtained from bycatch, which were divided in 4 treatments varying transplant density and species composition. On average, 78% of the colonies transplanted survived after 8 months. The results show that total branch length metric can detect the changes in growth of branching organisms better than maximum height metric. Additionally, this study demonstrates that octocorals grow much faster than generally assumed, but the constant dynamic of breakage and recovery that these species cope with maintains their net growth relatively low.
I would like to thank the fishermen community in Sagres, for all the help with the coral specimens, inside and outside of the vessel, as well as their friendship. I offer my gratitude to DOCAPESCA Baleira-Sagres for providing the warehouse where corals were measured, maintained and stored over this period, to the Autoridade Marítima Nacional for the accommodation provided in Sagres, and to the Instituto da Conservação da Natureza e das Florestas (ICNF) for providing the authorization for the deployments. Additionally, this study was co-funded by the project HABMAR- “Contribuição para potenciar a proteção e revitalização da biodiversidade marinha e de habitats especiais na costa continental portuguesa”, MAR2020 projeto MAR-01.04.02-FEAMP-0018 “HABMAR”
APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "Jardins de coraux"

1

Les jardins de corail. La Découverte, 2002.

Find full text
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Jardins de coraux"

1

Jardine, Alice. "Risking Who One Is, at the Risk of Thinking." In Being Contemporary, 243–59. Liverpool University Press, 2016. http://dx.doi.org/10.5949/liverpool/9781781382639.003.0016.

Full text
Abstract:
‘Risking Who One Is, at the Risk of Thinking: On Writing an Intellectual Biography of Julia Kristeva’, written by Alice Jardine, discusses the task of writing an intellectual biography and highlights the state of the discipline and the role of the contemporary critic as an arbiter of categories whose task is to define the contemporary and contemporary studies. In his essay, Jardine asks ‘How can one operate critically as an intellectual when one’s corpus, one’s object of critique, has been produced by a living artist, philosopher-critic, or writer with whom one feels deep affinity?’
APA, Harvard, Vancouver, ISO, and other styles
2

Van Haeperen, Françoise. "Ostia. Lieu de culte (?) du jardin de l’îlot I, IV." In Fana, templa, delubra. Corpus dei luoghi di culto dell'Italia antica (FTD) - 6. Collège de France, 2019. http://dx.doi.org/10.4000/books.cdf.6507.

Full text
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography