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| Registros recuperados: 17 | |
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| Soest, R.W.M. van; Zea, S.. |
| Monanthus ciocalyptoides n. sp. is described from two localities in the West Indian region, viz. the Saba Bank (17°25’N 63°33’W) and the Colombian Caribbean (11°20’N 74°09’W). The genus was hitherto known from South African waters only, by the type-species M. plumosus Kirkpatrick (1903). The systematic status of the new species and the genus as sublithistid members of the order Halichondrida is discussed. |
| Tipo: Article / Letter to the editor |
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| Ano: 1986 |
URL: http://www.repository.naturalis.nl/record/505517 |
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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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| Mora-Cristancho, J.; Zea, S.; Gil-Agudelo, D.. |
| Las superficies sumerigdas en el mar son densamente colonizadas por bacterias y sus interacciones, tales como la inhibición del crecimiento, son importantes para determinar el desarollo de comunidades bactarinas, como también de posteriores etapas de las macroepibiosis. Para determinar el potencial de interacción entre bactarias de las biopelículas de esponjas, se realizaron ensayos de actividad de inhibición in vitro de crecimiento entre cepas bacterianas aisladas de superficies con diferente grado de macroepibiosis, de las esponjas Apysina insularis (limpia), Aplysina lacunosa (con macroepibiosis) y de la superficie calcárea de la concha del molusco bivalvo Donax sp. El procentaje total de interacción antagónica entre estas cepas bacterianas fue del 64... |
| Tipo: Journal Contribution |
Palavras-chave: Epibiosis; Sponges; Sponges; Http://aims.fao.org/aos/agrovoc/c_7321. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/3574 |
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| Mora-Christancho, J.; Zea, S.; Santos-Acevedo, M.; Newmark-Umbreit, F.. |
| La determinación de actividad antimitótica de extractos de organismos marinos genera expectativas para la obtención de sustancias con potencial anticancerígeno a partir de fuentes alternativas. Se evaluó la actividad antimitótica in vitro de extractos orgánicos crudos de 15 esponjas de la costa Caribe colombiana, en embriones del erizo de mar Lytechinus variegatus. El 80% de las especies (Spirastrella coccinea, Myrmekioderma rea, Iotrochota imminuta, Halichondria sp., Petromica ciocalyptoides, Cinachyrella kuekenthali, Biemna cribaria, Oceanapia peltata, Xestospongia proxima, Oceanapia bartschi, Polymastia tenax y Dragmacidon reticulata) mostró un nivel de actividad fuerte inhibiendo la divisiones mitóticas desde el primer estadio celular durante la... |
| Tipo: Journal Contribution |
Palavras-chave: Cytotoxicity; Cytotoxicity; Http://aims.fao.org/aos/agrovoc/c_34251. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/3472 |
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| Parra-Velandia, F.J.; Zea, S.. |
| In tropical littoral environments, suspended organic matter favors the presence of sessile filter feeder organisms such as sponges, over those predominantly phototrophic such as algae and corals. In the Santa Marta area in the Colombian Caribbean, productivity is enhanced by alternating pulses of coastal upwelling and continental runoff, resulting in an important diversity and abundance of sponges. Species of the genus Ircinia ( I. campana, I. felix and I.strobilina) are conspicuous and abundant in the rocky and reef biotopes of the area. To establish the influence of predominant environmental conditions on the distribution of these three species, their density, size and microhabitat preference, their form and color, the occurrence of predation signs, the... |
| Tipo: Journal Contribution |
Palavras-chave: Distribution; Size; Shape; Distribution; Size; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_7093. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/3075 |
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| Arias, J.; Zea, S.; Newmark, F.; Santos-Acevedo, M.. |
| As a contribution to the biological knowledge about the sea fan Gorgonia ventalina and the use of this information as a tool to generate conservation and management strategies for this threatened species, a study about its annual growth rate, in different reef areas in Santa Marta and the National Natural Park Tayrona in the Colombian Caribbean took place. Manual measurements of 35 colonies were analyzed and images of 11 colonies were recorded in the beginning and in the end of the field stage. The annual growth rate varies among colonies and areas where measurements were taken. The average annual growth rate obtained with both of the methods was high and oscillated between 7.6 and 8.1 cm/year in height and between 6.9 and 8.3 cm/year wide. The total area... |
| Tipo: Journal Contribution |
Palavras-chave: Antifouling substances; Environmental impact; Fans; Environmental impact; Http://aims.fao.org/aos/agrovoc/c_24420. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/1975 |
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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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| Bejarano-Chavarro, S.; Zea, S.; Díaz, J.M.. |
| Ophiuroids are conspicuous dwellers of exposed and cryptic microhabitats available in coral reefs. This investigation pretended to discern ophiuroid community composition at microhabitats available in sponges and other reef components of different character (biotic v s. abiotic) or position over the substrate (elevated v s. non- elevated), at shallow reefs within the Montastraea spp. zone at San Bernardo Archipelago (Colombian Caribbean). Evaluating the abundance of organisms related to availability of different microhabitats, schemes of exclusive or preferential occupation of a particular elevated component were determined. These schemes, are discussed as initial cues that suggest the existence of benefic ecological relations. Samplings were performed at... |
| Tipo: Journal Contribution |
Palavras-chave: Microhabitats; Epibiosis; Sponges; Sponges; Http://aims.fao.org/aos/agrovoc/c_7321. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/3052 |
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| Bernal, A.; Zea, S.. |
| Se estudiaron las variaciones en la estructura taxonómica y trófica de la comunidad de zooplancton en la provincia nerítica del área de Santa Marta, Mar Caribe Colombiano, asociadas a fertilizaciones alternantes entre descarga continental y afloramiento costero. Los muestreos se efectuaron en noviembre de 1991 durante la temporada mayor de lluvias, y en marzo de 1992 durante la temporada seca. Los organismos fueron identificados y contabilizados, determinándose la biomasa por nivel trófico. Se discriminaron 82 especies-taxa, la mayoría de ellas oceánico costeras y con predominancia de omnívoros. La composición de la comunidad varió temporal y espacialmente con las condiciones oceanográficas predominantes, evidenciando procesos sucesionales relacionados con... |
| Tipo: Journal Contribution |
Palavras-chave: Zooplankton; Trophic structure; Coastal upwelling; Zooplankton; Http://aims.fao.org/aos/agrovoc/c_15490. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/3303 |
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| Márquez, J.C.; Zea, S.; López-Victoria, M.. |
| Temperaturas del agua de mar por encima del promedio durante 2005 en el Archipiélago de las Islas del Rosario (Caribe Colombiano) causaron un blanqueamiento coralino masivo en aguas someras (hasta 2-3 m de profundidad). Para confirmar resultados previos en los que el estrés inducido por calentamiento del agua en los corales puede acelerar la velocidad a la que esponjas excavadoras incrustantes le ganan espacio a los corales vivos, se contrastaron las tasas de propagación lateral en individuos de la esponja Cliona tenuis previamente marcados, que estaban colonizando los corales Diploria strigosa y Siderastrea siderea a profundidades de 5 - 6 m. Se hicieron comparaciones pareadas del avance de cada individuo de esponja entre dos intervalos de medida... |
| Tipo: Journal Contribution |
Palavras-chave: Sponges; Coral; Competitors; Associated species; Temperature effects; Sponges; Http://aims.fao.org/aos/agrovoc/c_7321. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/1987 |
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| Soest, R.W.M. van; Zea, S.; Kielman, M.. |
| New sponge species belonging to the closely related fistular genera Zyzzya, Cornulella, Damiria, and Acheliderma are described from reef habitats off the coasts of Colombia, Bonaire and Curaçao in the southern Caribbean. With very few exceptions these sponges are small to tiny specimens inhabiting crevices and other cryptic habitats; some may be excavating. For comparison both published and unpublished material belonging to these genera from other parts of the world was examined, and this yielded several nomenclatorial changes and a further three new species from the Indian Ocean. The new species are: Zyzzya invemar (Caribbean), Cornulella santamartae (Caribbean), C. tyro (Seychelles), C. amirantensis (Seychelles), Damiria leonorae (Caribbean), D. toxifera... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Caribbean coral reefs; Seychelles reefs; Sponges; Poecilosclerida; Lophonidae; Fistule growth form; Excavating growth form. |
| Ano: 1994 |
URL: http://www.repository.naturalis.nl/record/503917 |
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| Zea, S.; Giraldo-H., R.; Mancera-P., J.E.; Martínez-C., J.. |
| A partir de datos disponibles de cuatro estaciones de muestreo de la Ciénaga Grande de Santa Marta (Mar Caribe, Colombia), se exploraron las correlaciones cruzadas, contemporáneas y rezagadas en el tiempo, entre series quincenales de variables "biológicas" (clorofila a, producción primaria) y "fisicoquímicas" (salinidad, transparencia, nutrientes inorgánicos, nitrógeno y fósforo totales, feopigmentos, proteínas del seston). En contraste con análisis previos, el volver estacionarias las series (media y varianza constantes) eliminó variaciones de tendencia y magnitud asociadas con el clima, y enfatizó variaciones a una escala de semanas. Como resultado, cambios en la producción primaria no se relacionaron ni con los cambios contemporáneos en biomasa de... |
| Tipo: Journal Contribution |
Palavras-chave: Cross correlation; Primary production; Coastal lagoons; Primary production; Coastal lagoons; Http://aims.fao.org/aos/agrovoc/c_34329; Http://aims.fao.org/aos/agrovoc/c_1697. |
| Ano: 1998 |
URL: http://hdl.handle.net/1834/3304 |
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| Registros recuperados: 17 | |
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