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| Registros recuperados: 116 | |
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| Navone,Graciela T.; Notarnicola,Juliana; Nava,Santiago; Robles,M. del Rosario; Galliari,Carlos; Lareschi,Marcela. |
| The assemblage of arthropods and helminths, present in sigmodontine rodents (Cricetidae) from a broad wetland area of the Río de la Plata, Argentina, was studied. A total of 250 sigmodontines were captured during a two-year sampling period: Scapteromys aquaticus and Oxymycterus rufus were the most abundant hosts, followed by Oligoryzomys nigripes, Akodon azarae, Oligoryzomys flavescens, and Deltamys kempi. There were 33102 parasites collected, corresponding with Rhopalopsyllidae fleas (Siphonaptera), Hoplopleuridae lice (Phtiraptera), Laelapidae and Macronyssidae mites, Ixodidae ticks, and Trombiculidae chiggers (Acari), the trematodes Echinostomidae, Microphallidae, and Dicrocoelidae, the flatworm Ciclophyllidea, the nematods Trichuridae, Spiruridae,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ectoparasites; Endoparasites; Río de La Plata; Rodents; Wetlands. |
| Ano: 2009 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832009000100011 |
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| Simons, E.L.A.N.; Jansen, M.G.M.. |
| Lindernia dubia (L.) Pennell, a North American species, is still a rare and ephemerical neophyte in the Netherlands, but is invading the country rapidly now. We expect it to become a threat to plant biodiversity in Dutch wetlands. To describe its ecological and phytosociological position and assess its possible risk status we investigated known sites in the Netherlands. Being a pioneer species on open, muddy soil, more or less rich in nutrients, more or less acid, it occurs in different phytosociological classes: Littorelletea uniflorae, Phragmitetea, Isoeto-Nanojuncetea and Bidentetea tripartitae. We consider the species as possibly harmfull to vegetations belonging to the Littorelletea uniflorae and some associations of the Isoeto-Nanojuncetea, as those... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Lindernia dubia; Invasive alien species; Phytosociology; Wetlands; Littorelletea uniflorae; Isoeto-Nanojuncetea; Bidentetea tripartitae. |
| Ano: 2018 |
URL: http://www.repository.naturalis.nl/record/650112 |
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| Mailu, G.M.; Kiai, S.P.M.. |
| Kenya has a growing population projected to increase to 34 million people by the turn of the century. Though the country is undergoing industrial transformation, agriculture remains the mainstay of the economy. The country has an area of about 587 900 km2 of which 576 000 km2 is land surface. 88% of the land surface is classified as arid and semi-arid lands (ASALs) and the remaining 12% forms the medium and high agricultural potential land. This classification is based mainly on the moisture index as indicated by average annual rainfall and evapotranspiration. The Great Rift Valley running north/south influences and determines the drainage pattern so that from the flanks of the Rift Valley, water flows westwards to Lake Victoria and eastwards to the Indian... |
| Tipo: Working Paper |
Palavras-chave: Wetlands; Agricultural development; Http://aims.fao.org/aos/agrovoc/c_199. |
| Ano: 1995 |
URL: http://hdl.handle.net/1834/387 |
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| Bwathondi, P.O.J.; Mwamsojo, G.O.J.. |
| The main types of wetlands in Tanzania are described as an introduction to a coverage of the fisheries of the large lakes, the minor waters, the rivers and the intertidal ecosystems.Fisheries potential is estimated and details of catches for each wetland type are given.Fishing techniques and the future of the fisheries are discussed and recommendations madefor future wetlands fishery conservation. |
| Tipo: Working Paper |
Palavras-chave: Fishery resources; Wetlands. |
| Ano: 1993 |
URL: http://hdl.handle.net/1834/525 |
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| Gichuki, J.; Maithya, J.; Masai, D. M.. |
| Studies on the ecology of Lake Sare (Kenya) were carried out to provide baseline information on the ecological conditions before a major wetland reclamation project was started upstream of the lake. Results indicated that maximum depth had decreased by 0.9 m while Secchi depth readings had decreased by 0.1 m compared to historical values. This implies that the lake was undergoing siltation. pH values had increased from 6.80 to 7.58 reflecting increased primary production. Conductivity had increased from 106 – 137 2 ~kS/cm. NO3- N and PO4-P had significantly increased from 0.8~kg N l-1 and 0.14 ~kg P l-1 to 23.90.8~kg N l-1 and 34.80.8~kg P l-1 respectively while chlorophyll a values reached 34.8 ~kgl-1. The macrophyte environment was dominated by Cyperus... |
| Tipo: Proceedings Paper |
Palavras-chave: Aquatic ecology; Wetlands; Lakes. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/4298 |
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| Bakobi, B.L.M.. |
| The major wetland systems of Tanzania are described together with specific functions,products and attributes of lakes, rivers, swamps, estuaries, mangroves and coastal areas. Reasons and priorities for the conservation of wetlands are given together with the existingproblems of wetland conservation and their solutions. |
| Tipo: Working Paper |
Palavras-chave: Wetlands. |
| Ano: 1993 |
URL: http://hdl.handle.net/1834/522 |
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| Kabii, T.. |
| The African region as described in this overview includes the mainland continent and the island states of Cape Verde, Comoros, Madagascar, Mauritius, Sao Tome & Principe, and Seychelles, making up a total of 53 States, 23 of which are Contracting Parties to the Ramsar Convention. Africa's size and diversity of landscape are striking: bordered by the Mediterranean Sea to the north, the Indian and Atlantic oceans to the east and west respectively, and the Antarctic in the south, it covers 70º of latitude, several climatic zones, and a considerable altitudinal range. Various wetland types characterize the diverse and panoramic African environment, from mountains reaching an altitude of 6,000m through deserts to coastal zones at sea level. Although... |
| Tipo: Working Paper |
Palavras-chave: Wetlands. |
| Ano: 1996 |
URL: http://hdl.handle.net/1834/457 |
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| Ayache, F.. |
| Sebkha is a North African vernacular name for a shallow, salty depression. It is a common wetland type especially in semi-arid and arid climates but less so in sub-humid climates. In Tunisia, about 80 wetlands of this type stretch from north to south, most of them located within a short distance of the coast although not usually connected to the sea. They play a major hydrological role in stocking flood waters, recharging and/or discharging groundwater and are prime habitats for a diverse and typical fauna and flora thus generating many benefits to local communities and society as a whole. |
| Tipo: Other |
Palavras-chave: Wetlands. |
| Ano: 1995 |
URL: http://hdl.handle.net/1834/461 |
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| Mafabi, P.. |
| The Wetlands Programme within the Ministry of Water, Energy, Minerals and EnvironmentProtection is described as well as its major activity of developing a national policy onwetlands, by advising the various branches of government and consulting with people wholive in and use wetlands. The programme also provides technical information for theplanning of wetland activities and oversees developments in wetlands. About 10% of Uganda's total land area, 205,000 km2, is occupied by wetlands andhistorically these areas were referred to as wastelands. The belief that wetlands, especiallymarshes, are a major source of diseases like malaria and bilharzia has discouraged theirutilisation. Lind (1956) notes that although they occupy a large area of Uganda,... |
| Tipo: Report |
Palavras-chave: Wetlands. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/534 |
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| Registros recuperados: 116 | |
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