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| Francis, J.; Mmochi, A.J.. |
| The lack of infrastructure and treatment facilities for the large quantities of domestic sewage generated by expanding coastal urban populations, and an increasing number of visiting tourists, represents the greatest threat to public health, coastal habitats and economic development in each state of the region. Other priorities requiring action include the effects of siltation related to agricultural activity and the dumping of solid domestic waste in the coastal areas leading to the degradation of coastal habitats, with implications for fish stocks and catches. Furthermore, laws and policies regardinng waste disposal and quality of effluents need to be enacted and reinforced Although eutrophication and algal blooms associated with agricultural, industrial... |
| Tipo: Preprint |
Palavras-chave: Marine pollution; Freshwater pollution; Sewage; Freshwater environment; Coastal environment. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/209 |
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| This document provides a regiona loverview of land-based sources and activities and their impacts on the marine, coastal and associated freshwater environments in the East African region. The overview covers three coastal states [Keya, United Republic of Tanzania (Tanzania) and Mozambique] and five island States [Madagascar, Mauritius, the Islamic Federal Republic of Comoros (Comoros), the Zanzibar state of the United Republic of Tanzania and the Seychelles]. The rapidly expanding coastal populations of the region exert ever-increasing pressure on coastal habitats and resources. Land-based anthropogenic activities such as agriculture and industry, coastal urbanization, tourism and rock/mineral extraction, disturb natural condition and processes, degranding... |
| Tipo: Report |
Palavras-chave: Marine environment; Coastal environment; Freshwater environment. |
| Ano: 1998 |
URL: http://hdl.handle.net/1834/286 |
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| This document provides a regional overview on land-based sources and activities affecting the marine, coastal and associated freshwater environment in the West and Central African region. It addresses natural conditions and processes, anthropogenic impacts and its socio-economic implications, including losses of cultural heritage sites. This overview also contains information on emerging and forseeable problems in the region, proposing priorities for action including regional and international activities for cooperation. This document encompasses the following nations: Angola, Benin, Chad, Congo (Democratic Republic), Côte d’Ivoire, Gambia, Ghana, Guinea, Guinea-Bissau, Liberia, Mauritania, Nigeria, São Tomé and Principe, Senegal and Togo. |
| Tipo: Report |
Palavras-chave: Marine environment; Coastal environment; Freshwater environment. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/312 |
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| This document provides a regional overview on land-based sources and activities affecting the marine, coastal and associated freshwater environment in the West and Central African region. It addresses natural conditions and processes, anthropogenic impacts and its socio-economic implications, including losses of cultural heritage sites. This overview also contains information on emerging and forseeable problems in the region, proposing priorities for action including regional and international activities for cooperation. This document encompasses the following nations: Angola, Benin, Chad, Congo (Democratic Republic), Côte d’Ivoire, Gambia, Ghana, Guinea, Guinea-Bissau, Liberia, Mauritania, Nigeria, São Tomé and Principe, Senegal and Togo. |
| Tipo: Report |
Palavras-chave: Coastal zone management; Freshwater environment. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/800 |
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| Dias,Roberto Júnio Pedroso; D'Ávila,Sthefane; D'Agosto,Marta. |
| This study made a survey on the ciliate protozoans from Peritrichid and Suctorian taxa, epibionts of Pomacea lineata (Spix, 1827) (Ampullariidae). Fifty mollusks were collected in places of irrigation ditches and shell was scraped with a scalpel and the extracted material was analyzed in vivo by light microscopy. All examined mollusks presented epibiont ciliates on their shells. For the first time epibiont ciliates in P. lineata was record. Seven genera of ciliates: five peritrichids and two suctorians, were identified and classified within the subclass Peritrichia: Carchesium Ehrenberg, 1838 (Vorticellidae), Epistylis Ehrenberg, 1830 (Epistylidae), Opercularia Stein, 1854 (Operculariidae), Vaginicola Lamarck, 1816 (Vaginicolidae) and Vorticella Linnaeus,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Epizoic ciliates; Prosobranch snail; Freshwater environment. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000600015 |
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