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| Registros recuperados: 196 | |
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| Gittenberger, A.; Gittenberger, E.. |
| Twenty-two epitoniid species that live associated with various hard coral species are described. Three genera, viz. Epidendrium gen. nov., Epifungium gen. nov., and Surrepifungium gen. nov., and ten species are introduced as new to science, viz. Epidendrium aureum spec. nov., E. sordidum spec. nov., Epifungium adgranulosa spec. nov., E. adgravis spec. nov., E. adscabra spec. nov., E. marki spec. nov., E. nielsi spec. nov., E. pseudolochi spec. nov., E. pseudotwilae spec. nov., Surrepifungium patamakanthini spec. nov., and ‘Epitonium’ crassicostatum spec. nov. and ‘E.’ graviarmatum spec. nov. Although their identities as separate gene pools are convincingly demonstrated by molecular data, some of these species cannot be identified unequivocally on the basis... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Indo-Pacific; Parasites; Coral reefs; Coral/mollusc associations; Epitoniidae; Epitonium; Epidendrium; Epifungium; Surrepifungium; New species; New genera; Scleractinia; Fungiidae; Fungia; 42.73. |
| Ano: 2005 |
URL: http://www.repository.naturalis.nl/record/214349 |
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| Lindahl, U.. |
| Many coral reefs that have been subjected to severe coral mortality may erode into rubble before the reef framework has been stabilised by the growth of recruiting or surviving corals and other calcifying organisms. Since unconsolidated coral rubble provides a poor substrate for coral recruitment and subsequent growth, these damages can persist for a long time, even where there is ample supply of coral larvae. Rehabilitation of this type of habitat through coral transplantation has therefore been hampered since the substrate does not provide a base for attachment. Unattached corals that are moved by water movements may suffer severe damages through breakage and abrasion, and are also at risk of being buried in the shifting sediment. The aim of the present... |
| Tipo: Working Paper |
Palavras-chave: Coral reefs. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/431 |
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| Mahmoud, M.A.; Ammar, M.S.A.. |
| A novel and cheep approach for building artificial reefs was designed in such a way that sediments in an area of high sedimentation rate will be utilized in building the artificial substrate with no further sediment accumulation afterwards. The model consists of several steel cylinders which are soldered together in such a way to form a reef flat, a gentle slope and a steep slope, with two layers of narrow opening meshes (a lower plastic and an upper metallic one). Within a short periode (3 months), a substrate layer of a total of ~ 1 cm was formed between the two meshes, this layer increased to ~2 cm after 9 months. Transplants of the three species Stylophora pistillata, Echinopora gemmacea and Montipora spongiosa grow better when the attaching surface is... |
| Tipo: Journal Contribution |
Palavras-chave: Coral reefs; Artificial coral reefs; Transplantation; Substrate; Model; Sedimentation Sediment transport Artificial reefs. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1298 |
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| Schleyer, M.; Obura, D.; Motta, H.; Rodrigues, M.J.. |
| The 1997-1998 El Niño southern oscillation caused elevated sea temperatures that resulted in global coral bleaching. Coral reefs constitute an important biological resource in terms of their complex biodiversity and are the basis for tropical fisheries and marine ecotourism. They represent one of Mozambique’s main coastal assets, and coastal communities and the growing tourism industry rely mainly on reef-based resources. Today, about 6.6 million people live within Mozambique’s 48 coastal administrative districts. This represents 42% of the current population (15.7 million), which is expected to grow at 3% p.a. (INE, 1998). In 1994, the population density in coastal districts was 28 persons/km2. In 1996, much higher densities were recorded in the coastal... |
| Tipo: Report |
Palavras-chave: Coral reefs; El Nino phenomena. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/489 |
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| Schleyer, M.; Obura, D.; Rodrigues, M.J.. |
| The 1997-1998 El Nino southern oscillation (ENSO) caused elevated sea temperatures that resulted in global coral bleaching. Coral reefs constitute an important biological resource in terms of their complex biodiversity and are the basis for tropical reef fisheries and marine ecotourism. They represent one of Mozambique's main coastal assets and its coastal communities and growing tourism industry rely mainly on reef-based resources. Mozambican artisanal fisheries are largely centred on reefs and are responsible for about 70% of the total catch, highlighting their importance. Most tourism similarly occurs along the coast where the best infrastructure is established, especially near the coral reefs of Pemba, Mozambique Island, the Bazaruto Archipelago,... |
| Tipo: Report |
Palavras-chave: Coral reefs; El Nino phenomena; Tourism. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/888 |
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| Kramer, Daniel B; Michigan State University; dbk@msu.edu. |
| The utility of traditional bio-economic harvest models suffers from their dependence on two commonly used approaches. First, optimization is often assumed for harvester behavior despite system complexity and the often neglected costs associated with information gathering and deliberation. Second, ecosystem interactions are infrequently modeled despite a growing awareness that these interactions are important. This paper develops a simulation model to examine the consequences of harvesting at two trophic levels in a coral-reef food web. The model assumes adaptive rather than optimizing behavior among fishermen. The consequences of changing economic, biological, and social parameters are examined using resilience as an evaluative framework. Three general... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Fisheries; Resource economics; Coral reefs; Resilience; Adaptive behavior; Food web; Simulation. |
| Ano: 2008 |
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| Olaechea-Juárez, A.; González, E.; Guitart-Pérez-Puelles, B.. |
| Los arrecifes de coral son utilizados en dos formas principales: la extractiva y la no-extractiva. La forma extractiva incluye la captura de las especies que en él habitan, tales como peces, langostas, cangrejos, etc., así como en la colecta de productos con fines ornamentales, como esponjas, conchas y otros. La forma no extractiva se basa en la utilización del arrecife con fines de recreación, científicos y educacionales. La protección de los corales es de vital importancia para los hombres. El papel de los acuarios en promover su preservación a través de la exhibición y del uso del buceo contemplativo, es sumamente importante. Las maravillas que ofrecen nuestros mares y en particular los arrecifes coralinos, constituyen... |
| Tipo: Proceedings Paper |
Palavras-chave: Coral reefs; Tourism; Educa. |
| Ano: 1994 |
URL: http://hdl.handle.net/1834/4659 |
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| Muhando, C.A.; Mohammed, M.S.; Machano, H.. |
| Coral reefs play a crucial role in the well being of coastal communities in Tanzania (Johnstone et al., 1998; Muhando, 1999). However, despite their usefulness, coral reefs are being degraded by destructive anthropogenic activities (Salm et al., 1998) and natural causes (e.g., competition, predation, diseases, bleaching, etc.). The coral bleaching and mortality event of March - June 1998 was the most serious natural calamity ever recorded in the Indian Ocean (Wilkinson, et al., 1999). Several areas along the coast of Tanzania were affected. The degree of coral mortality varied between sites, from 60% - 90% at Tutia Reef in Mafia Island Marine Park and Misali Reef on the west coast of Pemba, to approximately 10% on reefs around Unguja Island, Zanzibar... |
| Tipo: Other |
Palavras-chave: Coral reefs. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/434 |
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| Muhando, C.A.. |
| Coral reefs play a crucial role to the well-being of coastal communities in Tanzania. Coastal fisheries, ecotourism and coastal land protection are, to some extent, sustained by coral reefs. A variety of fish species, spiny lobsters, octopus, sea cucumbers, clams, oysters and turtles form the basis of harvestable reef resources. More than 30% of marine fish landings are harvested on or adjacent to coral reef environment. Coral reefs also support offshore fisheries by providing feeding and nursery grounds for some oceanic (pelagic) fish stocks. Tourism based on coral reef ecosystems is peaking up, creating new opportunities for employment and substantial amounts of income for the people of Tanzania. |
| Tipo: Report |
Palavras-chave: Coral reefs; Socioeconomic development; Http://aims.fao.org/aos/agrovoc/c_29966. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/490 |
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| Schleyer, M.H.; Celliers, L.. |
| Southern African coral communities form a continuum from the more typical, accretive reefs in the tropics of Mozambique to the marginal, southernmost African distribution of this fauna in KwaZulu- Natal. While the latter are limited in size, they are gaining increasing attention as they provide a model for the study of many of the stresses to which these valuable systems are globally being subjected. Soft coral cover, comprising relatively few species, exceeds that of scleractinians over much of the southern reefs, and the coral communities attain a high biodiversity at this latitude on the East African coast. A long-term monitoring programme has revealed small yet significant changes in community structure on the reefs in recent years, concurrent with... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Biodiversity; Coral reefs; South Africa; 42.79. |
| Ano: 2003 |
URL: http://www.repository.naturalis.nl/record/220567 |
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| Martínez, S.; Acosta, A.. |
| Several predictions have been made, about magnitude and direction of temporal changes in the coral community structure, during the last decade. However, few studies have demonstrated it quantitatively. In order to document such changes, the coral community structure was studied in four continental reefs in the Colombian Caribbean, two in the Santa Marta region: Punta Betín (PB) and Morro Grande Island (MO), and two in the Tayrona National Natural Park (PNNT): Granate cove (GR) and Gayraca bay (GA). Coral composition and cover were quantified in 2002 and compared to base line studies from 1989 (PB, MO & GR) and from 1992 (GA). These variables were quantified by 20 m linear transects between 1.5 m and 29 m depth. After a decade, all reefs lost in average... |
| Tipo: Journal Contribution |
Palavras-chave: Coral reefs; Degradation; Temporal variations; Community composition; Coral reefs; Degradation; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_2159. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/2012 |
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| Turquet, J.; Quod, J.P.; Conejero, S.; Ralijaona, C.. |
| During the last two decades, countries from the Indian Ocean region have experienced a variety of seafood poisonings involving coral reef fishes (ciguatera), turtles (chelonitoxism), sharks (carchatoxism) and sardines (clupeotoxism) (Quod & Turquet, 1996; Turquet et al., 2000a). The ecotoxicological process of ciguatera fish poisoning (CFP) is caused by benthic dinoflagellates from coral reefs (Gambierdiscus, Prorocentrum, Ostreopsis) that are epiphytic on algal turfs, coral rubble and macro-algae. They produce potent neurotoxins that accumulate in herbivorous marine animals and are transferred to higher levels of the food chain by carnivorous fish. These microalgae are natural inhabitants of coral reefs and become problematic when densities reach... |
| Tipo: Report |
Palavras-chave: Coral reefs. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/483 |
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| Maire, Eva; Villeger, Sebastien; Graham, Nicholas A. J.; Hoey, Andrew S.; Cinner, Joshua; Ferse, Sebastian C. A.; Aliaume, Catherine; Booth, David J.; Feary, David A.; Kulbicki, Michel; Sandin, Stuart A.; Vigliola, Laurent; Mouillot, David. |
| Determining whether many functionally complementary species or only a subset of key species are necessary to maintain ecosystem functioning and services is a critical question in community ecology and biodiversity conservation. Identifying such key species remains challenging, especially in the tropics where many species co-occur and can potentially support the same or different processes. Here, we developed a new community-wide scan CWS) approach, analogous to the genome-wide scan, to identify fish species that significantly contribute, beyond the socio-environmental and species richness effects, to the biomass and coral cover on Indo-Pacific reefs. We found that only a limited set of species (51 out of approx. 400, = approx. 13%), belonging to various... |
| Tipo: Text |
Palavras-chave: Ecosystem functioning; Biodiversity; Fish community; Key species; Ecosystem services; Coral reefs. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00452/56388/68019.pdf |
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| Beenaerts, N.; Berghe, E.V.. |
| Three different transect methods were compared at two different sites in Kenya, on their efficiency to estimate hard coral cover, genus richness and Shannon diversity index. For a modified line transect method (LTM), the line intercept method (LIT) and a linear point intercept (LPI) method the relative efficiency of the three methods was calculated with respect to the tested parameters. The three methods were examined along identical transect lines (10 m) and a total of 27 transect triplets were recorded in Vipingo and 21 in Mombasa. The correlation coefficients for all three ecological parameters were calculated for the three possible pairs of methods, and the accumulation curves plotted for each of the parameters using number of transects as the... |
| Tipo: Journal Contribution |
Palavras-chave: Coral reefs. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1131 |
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| Registros recuperados: 196 | |
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