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| Registros recuperados: 40 | |
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| Willenz, P.; Pomponi, S.A.. |
| A new coralline sponge, <i>Willardia caicosensis</i>, assigned to the family Timeidae, is described from the deep fore reef off the Turks & Caicos Islands, tropical western Atlantic Ocean, where it is common at depths ranging from 100 to 119 m. Individuals vary up to 15-20 cm in width. The relatively thin aragonitic skeleton is covered with delicate pillars up to + 1 mm. The living tissue is restricted to the spaces between pillars and a thin sheet lying above the calcareous skeleton. Exhalant canals converge upon regularly spaced central oscules on the sponge surface. Siliceous spicules include tylostyles and amphiasters which are secondarily embedded in the aragonitic moiety of the skeleton. In addition, ultrastructural characters of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coral; New genera; Sponges; Porifera [Sponges]; Timeidae. |
| Ano: 1996 |
URL: http://www.vliz.be/imisdocs/publications/303635.pdf |
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| MACHADO,ALTAIR J.; MORAES,SIMONE S.. |
| Sediment samples from two different reef environments were analyzed for their foraminiferal content: the Sioba/Rio do Fogo reefs, located in a broad shallow shelf dominated by strong currents (Rio Grande do Norte State), and the Praia do Forte reefs, located in a narrow shelf under the influence of wind-induced waves (Bahia State). The recorded foraminiferal fauna, from forty-six samples, is represented by 113 species, being the encrusting species Homotrema rubrum present in nine samples from the Sioba/Rio do Fogo reefs and in 11 samples from Praia do Forte reefs. Homotrema fragments recovered from Sioba/Rio do Fogo are mostly polished with rounded edges (51.59%) and some have a whitish color, whereas the specimens from Praia do Forte reefs are... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Homotrema rubrum; Reefs; Coralline algae; Coral. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000400012 |
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| Chaves-Fonnegra, A.; Zea, S.; Gómez, M.L.. |
| It is known that the encrusting and excavating Caribbean sponge Cliona delitrix may increase its abundance near sources of sewage. To ascertain whether its current conspicuousness in leeward reefs of San Andrés Island (SW Caribbean, Colombia) is related to organic pollution from local raw sewage discharges, quantitative data on density and cover of this sponge and other benthic components was obtained from belt and line transects at seven stations along the shallow (5-10 m deep) terrace. Coral mucus was sampled to quantify Escherichia coli bacteria, as an approximate indicator of sewage plume influence on benthic biota. A negative multiplicative regression between amount of E. coli in coral mucus and distance from the main raw sewage outlet demonstrated... |
| Tipo: Journal Contribution |
Palavras-chave: Sewage; Coral; Sewage; Http://aims.fao.org/aos/agrovoc/c_7007. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/3517 |
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| González-Díaz, P.; Perera-Pérez, O.; Pérez-García, J. A.; Hernández-Fernández, L.. |
| La investigación se realizó en los meses de octubre de 2011 y marzo de 2012. A partir del análisis de imágenes satelitales se seleccionaron 41 sitios en el sector central del golfo de Ana María, región surcentral de Cuba. En dichos sitios se llevó a cabo el inventario de corales, gorgonias y esponjas. Para los corales, se analizó, además, el estado de salud. El inventario se realizó en los ecosistemas de manglar, pastizales y arrecifes de coral (biotopos de cabezos y fondos areno-rocosos). El número de especies encontradas de corales fue de 41; de gorgonias, 23 y de esponjas, 41. Los corales más abundantes fueron Porites astreoides, Millepora alcicornis, Siderastrea siderea, Siderastrea radians, Agaricia agaricites. La mayor biodiversidad se... |
| Tipo: Journal Contribution |
Palavras-chave: Coral; Sponges; Recruitment; Biodiversity. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/4641 |
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| Evangelista, H.; Sifeddine, A.; Correge, T.; Servain, J.; Dassie, E. P.; Logato, R.; Cordeiro, R. C.; Shen, C. -c.; Le Cornec, F.; Nogueira, J.; Segal, B.; Castagna, A.; Turcq, B.. |
| Although relatively rare compared to similar latitudes in the Pacific or Indian Oceans, massive coral colonies are present in the Tropical/Equatorial Southwestern Atlantic Ocean. However, detailed geo-chemical compositions of these corals are still largely unknown. In this work, we present growth rates, Sr/Ca, and U/Ca ratios of the coral colony (Siderastrea stellata) sampled at Rocas Atoll, off the Brazilian coast. These variables are primarily affected by sea surface temperature (SST) at seasonal scale, and by wind stress at interannual scale, these results represent a broad new finding. A lower significance at the interannual time scale between Sr/Ca and U/Ca with respect to SST is attributed to the low SST amplitude closed to Equator. An investigation... |
| Tipo: Text |
Palavras-chave: Coral; Siderastrea stellata; Rocas Atoll; ITCZ; Equatorial Atlantic; Wind stress. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00623/73552/73796.pdf |
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| Jaramillo-González, J.; Acosta, A.. |
| Los arrecifes coralinos del mundo han sufrido un declive durante las pasadas tres décadas. Estos cambios se han evaluado en arrecifes en franja; sin embargo, se desconoce si los tensores causantes de dichos cambios afectan la dinámica de una comunidad coralina en los primeros estados de la sucesión antes del desarrollo de un arrecife. Para resolver este interrogante, se monitoreó durante 2004, 2005 y 2006 una comuniddad coralina aislada en San Andrés. Se compararon temporalmente la abundancia, cobertura y mortalidad parcial sufrida por la comjnidad coralina y sus poblaciones de coral dominantes. La comunidad coralina no presentó variación estadística en riqueza, abundancia, cobertura, ni en área de mortalidad parcial. Sin embargo, esta comunidad si varió... |
| Tipo: Journal Contribution |
Palavras-chave: Coral; Dynamics; Mortality; Mortality; Http://aims.fao.org/aos/agrovoc/c_4945. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/3605 |
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| Santos,H.F.; Carmo,F.L.; Leite,D.C.A.; Jesus,H.E.; De Carvalho Maalouf,P.; Almeida,C.; Soriano,A.U.; Altomari,D.; Suhett,L.; Vólaro,V.; Valoni,E.; Francisco,M.; Vieira,J.; Rocha,R.; Sardinha,B.L.; Mendes,L.B.; João,R.R.; Lacava,B.; Jesus,R.F.; Sebastian,G.V.; Pessoa,A.; van Elsas,J.D.; Rezende,R.P.; Pires,D.O.; Duarte,G.; Castro,C.B.; Rosado,A.S.; Peixoto,R.S.. |
| This study aimed to test different protocols for the extraction of microbial DNA from the coral Mussismilia harttii. Four different commercial kits were tested, three of them based on methods for DNA extraction from soil (FastDNA SPIN Kit for soil, MP Bio, PowerSoil DNA Isolation Kit, MoBio, and ZR Soil Microbe DNA Kit, Zymo Research) and one kit for DNA extraction from plants (UltraClean Plant DNA Isolation Kit, MoBio). Five polyps of the same colony of M. harttii were macerated and aliquots were submitted to DNA extraction by the different kits. After extraction, the DNA was quantified and PCR-DGGE was used to study the molecular fingerprint of Bacteria and Eukarya. Among the four kits tested, the ZR Soil Microbe DNA Kit was the most efficient with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coral; Microbial diversity; DNA extraction. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000200012 |
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| Pereira,Natan S.; Sial,Alcídes N.; Kikuchi,Ruy K.P.; Ferreira,Valderez P.; Ullmann,Clemens V.; Frei,Robert; Cunha,Adriana M.C.. |
| ABSTRACT Coral skeletons contain records of past environmental conditions due to their long life span and well calibrated geochemical signatures. C and O isotope records of corals are especially interesting, because they can highlight multidecadal variability of local climate conditions beyond the instrumental record, with high fidelity and sub-annual resolution. Although, in order to get an optimal geochemical signal in coral skeleton, sampling strategies must be followed. Here we report one of the first coral-based isotopic record from the Equatorial South Atlantic from two colonies of Porites astreoides from the Rocas Atoll (offshore Brazil), a new location for climate reconstruction. We present time series of isotopic variation from profiles along the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coral; Climate change; Rocas Atoll; Carbon and oxygen isotopes; South Atlantic Ocean. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000501939 |
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| Chacón Gómez, Isabel Cristina; Reyes, Javier; Santodomingo, Nadiezhda. |
| Los octocorales están siendo incluidos en una variedad de estudios a nivel mundial, buscando el análisis de su taxonomía, ecología, biogeografía, genética, geoquímica, entre otros. El estudio que se describe a continuación incluye las muestras recolectadas durante las exploraciones llevadas a cabo por el Instituto de Investigaciones Marinas y Costeras-INVEMAR entre 1998 y 2002 desde aguas someras (20 m) hasta profundidades de 500 m. Se examinaron un total de 280 lotes de museo. Las muestras fueron recolectadas en 32 estaciones distribuidas a lo largo del talud y la plataforma continental del Caribe colombiano. Se reconocieron un total de 44 especies; 21 de ellas identificadas a nivel de especie y 23 a nivel de género; se encuentran distribuidas en 22... |
| Tipo: Journal Contribution |
Palavras-chave: Taxonomy; Coral. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/4431 |
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| Zoppi de Roa, Evelyn; Pedro Alonso, G.. |
| ZOPPI DE ROA, EVELYN & PEDRO ALONSO G.: Distribution of Mysidium integrum (Tattersall) (Crustacea: Mysidacea) in Venezuelan coral habitats. Studies Nat. Hist. Caribbean Region 73, Amsterdam 1997: 55-62. This paper reports the occurrence, distribution and some ecological aspects of mysids in six coral habitats along the northern coast of Venezuela. Collections of mysid fauna were made during various months in the years 1980-1983, with simultaneous measurement of environmental conditions. Only Mysidium integrum (TATTERSALL 1951) has been found to be present in the protected zones of various coral species, and between the spines of the sea urchin Diadema antillarum (Philippi). Depth of water and type of association appear to be critical factors affecting... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Microhabitat; Sea urchin; Mysidium integrum; Venezuela.; Coral. |
| Ano: 1997 |
URL: http://www.repository.naturalis.nl/record/503185 |
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| Chaves-Fonnegra, A.; López-Victoria, M.; Parra-Velandia, F.; Zea, S.. |
| The Caribbean encrusting and excavating sponges Cliona aprica, C. caribbaea, C. delitrix and C. tenuis (Porifera, Hadromerida, Clionaidae), aggresively undermine and displace live coral tissue. At San Andrés island and Islas del Rosario (Colombian Caribbean), in all 145 observed cases of direct contact of the sponges C. aprica, C. caribbaea and C. tenuis with 17 coral species, corals showed unhealthy signs in their tissue. It was also noticed that the surface of these sponges is colonized by few organisms and that they are rarely preyed upon. To establish the possible use of chemical substances by these sponges in competition for space with corals (allelopathy), as inhibitors of larval settlement (antifouling), and as feeding deterrents against generalist... |
| Tipo: Journal Contribution |
Palavras-chave: Sponges; Coral; Ecology; Competitive behaviour; Associated species; Antifouling substances; Ecology; Sponges; Http://aims.fao.org/aos/agrovoc/c_2467; Http://aims.fao.org/aos/agrovoc/c_7321. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1990 |
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| Andrade,Jenny Patricia; Gómez A,Claudia Marcela; Barbosa B,Helber de J; Castellanos H,Leonardo; Osorno R,Oscar E. |
| La investigación se desarrolló con el fin de implementar una metodología que permitiera la realización de ensayos de interacciones alelopáticas entre corales y esponjas, minimizando la interacción física provocada por el uso de dispositivos que producen roce y efecto abrasivo sobre los pólipos del coral. Se llevó a cabo un estudio de preformulación utilizando polímeros con características mucoadhesivas sobre mucus que recubre los pólipos de coral, con el fin de obtener un gel, incorporando en las formulaciones un extracto de la esponja Cliona delitrix. Se caracterizaron propiedades como extensibilidad y adherencia, así como la capacidad bioadhesiva de las formulaciones propuestas, considerando su comportamiento reológico. Estas mostraron una buena... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Polímeros mucoadhesivos; Mucoadhesión; Preformulación; Gel; Ecología química marina; Alelopatía; Esponja; Coral. |
| Ano: 2010 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2010000100006 |
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| Garzón-Ferreira, J.; Pinzón-C., J.H.. |
| Malpelo, a small rocky offshore island that supports one of the few coral populations in the eastern Pacific, was visited on June 1-5, 1999 with the purpose of evaluating the status of the coral communities. Using rapid visual methods, the cover of major categories of sessile organisms and the health condition of the coral species were assessed at 8 stations between 11 and 31 m depth. “El Arrecife”, which is the largest coral formation in Malpelo, seems to have suffered a 20% reduction of the live coral cover since 1972 when a mean value of 65% was recorded. This decline, which probably was originated by the 1982-83 strong bleaching event that affected widely the American Pacific, is reflected also by the present levels of recent coral mortality: mean of... |
| Tipo: Journal Contribution |
Palavras-chave: Reefs; Coral. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/3255 |
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| Zapata, Fernando A.; Jaramillo González, Juliana; Navas Camacho, Raúl. |
| El blanqueamiento coralino es asociado frecuentemente con temperaturas inusualmente cálidas, pero también puede ocurrir durante episodios de enfriamiento del agua. En esta nota registramos un evento de blanqueamiento coralino, especialmente en Porites lobata, después de las temperaturas del mar más bajas registradas para Malpelo en 21 años. En abril de 2009 observamos blanqueamiento en cuatro de las diez especies coralinas registradas en la isla Malpelo. Este evento fue más frecuente (hasta el 72 % de las colonias) y extenso (hasta el 87 % del área de la colonia) en P. lobata. La temperatura superficial del mar obtenida por satélites alcanzó valores tan inusualmente bajos como 23.1 °C en marzo de 2009 con anomalías térmicas hasta de -4.4 °C. Un sensor de... |
| Tipo: Journal Contribution |
Palavras-chave: Coral; Environmental conditions; Porites lobata. |
| Ano: 2011 |
URL: http://hdl.handle.net/1834/4427 |
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| Vega-Sequeda, J.; Rodríguez-Ramírez, A.; Reyes-Nivia, M.C.; Navas-Camacho, R.. |
| Se evaluaron 20 formaciones coralinas del área de Santa Marta en términos de: 1) composición y abundancia de los componentes del sustrato y 2) prevalencia de enfermedades coralinas y blanqueamiento. Para obtener la información se utilizaron bandas de 10 x 1 m y 10 x 2 m respectivamente. Se registró un total de 33 especies de corales duros. Las algas y los corales fueron los componentes de mayor cobertura, sin embargo sus promedios variaron ampliamente en el área de estudio (coral= 4.0 ± 0.9 %-62.0 ± 7.2 %; algas = 30.6 ± 11.0 %-78.3 ± 3.0 %). Las especies de coral con coberturas promedio más altas fueron Colpophyllia natans, Diploria strigosa, Acropora palmata y Montastraea cavernosa (7.5 ± 2.7 %, 6.7 ± 2.1 %, 4.0 ± 2.8 % y 3.8 ± 1.0 %, respectivamente).... |
| Tipo: Journal Contribution |
Palavras-chave: Coral. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/3486 |
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| Registros recuperados: 40 | |
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