Now showing items 3214-3233 of 5515

  • La praire (<Venus rosalina>) à l'Ouest du Banc d'Arguin (Mauritanie) : évaluation des stocks et dynamique des populations. 

    Diop, M. (IMROP, 1988-10)
    Ce travail est consacré à l’étude du banc à <Venus rosalina> situé à l’ouest du Banc d’Arguin (Mauritanie). Ce gisement est d’un intérêt économique certain, puisque la biomasse estimée se situe entre 1,3 et 2,8 millions ...
  • Lack of mtDNA differentiation among hamlets (Hypoplectrus, Serranidae). 

    García-Machado, E.; Chevalier, P.; Solignac, M. (2003)
    The hamlets are a group of vividly colored fish species of the Serranidae family differentiated only by the color pattern of the body. Although there are divergent views about hamlet taxonomy, experimental and field ...
  • lagoonal sand smelts ( <Atherina lagunaea>, teleostei, atherinidae) inhabit marine shallow waters of the coasts of djerba island (Tunisia) 

    Bouriga, N.; Selmi, S.; Aurelle, D.; Barthelemy, R.; Quignard, J-P.; Trabelsi, M. (INSTM, 2009)
    Atherina boyeri de la Méditerranée est un complexe hautement polymorphe ayant un génotype capable d’une réponse phénotypique flexible. Elle peut rapidement adapter les traits de sa morphologie à des environnements allant ...
  • Lagoonal sand smelts (atherina lagunaea, teleostei, atherinidae) inhabit marine shallow waters of the coasts of djerba island (tunisia) 

    Bouriga, N.; Selmi, S.; Aurelle, D.; Barthelemy, R.; Quignard, J-P.; Trabelsi, M. (2009)
    Atherina boyeri de la Méditerranée est un complexe hautement polymorphe ayant un génotype capable d’une réponse phénotypique flexible. Elle peut rapidement adapter les traits de sa morphologie à des environnements allant ...
  • Lake George 

    Mafabi, P. (2000)
    Uganda ratified the Ramsar Convention in 1988, and designated Lake George a Ramsar site. Located astride the equator, the lake and associated wetlands support a wide variety of biological resources. The reasons for this ...
  • Lake Turkana Fishery: Options for Development of a Sustainable Trade. A Study Report. 

    SNV (Netherlands Development Organization) (SNV (Netherlands Development Organization)Eldoret, Kenya, 2005)
    From a trade and development point of view, Lake Turkana has been relatively neglected, at least in the last decade. During the same time, the opinion among many people, even in the fishery sector, has been that the lake ...
  • Lake Turkana limnologlcal study 1985-1988. 

    Kallqvist, T.; Lien, L.; Liti, D. (Norwegian Institute for Water Research & Kenya Marine and Fisheries Research InstituteOslo, Norway, 1988)
    The lake level was declining during the study and reached the lowest level ever recorded in 1988. The salt content was increasing and conductivity reached ca.380 mS/m in 1988. Annual temperature variations were small but ...
  • Lake Turkana National Parks Kenya. 

    United Nations Environment Programme (United Nations Environment ProgrammeNairobi, Kenya, 2005)
    Lake Turkana is the largest, most northerly and most saline of Africa's Rift Valley lakes and an outstanding laboratory for the study of plant and animal communities. The three National Parks are a stopover for migrant ...
  • Lake Victoria Water Levels. 

    Okungu, J.O.; Okonga, J.R.; Mngodo, R.J.; Sangale, F.D.; Senfuma, N.; Mjengera, H.; Sewagude, S.; Mwembembezi, L. (Ministry of Water and IrrigationKisumu, Kenya, 2005)
    The purpose of this brief report is to explain the reasons behind the falling lake levels, predict future trends and suggest remedial measures.
  • Lake Victoria: the Changing Lake. 

    Mwirigi, P.; Rutagemwa, D.; Gikuma-Njuru, P.; Njuguna, H.; Matovu, A.; Waya, R.; Mwebaza-Ndawula, L.; Ssenfuma-Nsubuga, M.; Kinobe, J.; Abuodha, J.; Hecky, R. (Lake Victoria Environment Management Project (LVEMP)Kisumu, Kenya, 2005)
    Water quality monitoring activities were carried out on physical-chemical parameters, water chemistry and biotic indices at selected littoral and pelagic stations along north-south and east-west transects over an annual ...
  • Lake Victoria’s Nile Perch Fish Cluster: Institutions, Politics and Joint Action. 

    Mitullah, W. (Institute of Development Studies, University of NairobiNairobi, Kenya, 2000)
    The collective efficiency model contends that joint action is essential for coping with new challenges. This paper discusses how enterprises in the Lake Victoria fish cluster operate, interact and address common challenges ...
  • Lakes water quality monitoring and management programme in developing countries 

    Mutia, Silas M (2006)
    Developing Countries face an array of traditional and modern lakes water quality problems ranging from faecal contamination to toxic chemicals. Moreover, they do so in an economic environment that is severely restricted, ...
  • Land Based Activities and Sources of Pollution to the Marine, Coastal and Associated Fresh Water Ecosystems in the Western Indian Ocean Region 

    Francis, J.; Mmochi, A.J. (2003)
    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 ...
  • Land use and Coastal Management in the third Countries; Egypt as a case 

    Hamza, W. (2003)
    Although the aspects of both land use and coastal management represent part of the larger concept of sustainable development, the strength and interest with which these aspects are received varies considerably among ...
  • Land use in Kenya 

    Consultants for Natural Resources Management (2000)
    This book exposes the key land use and environmental problems facing Kenya today due to lack of an appropriate national land use policy. The publication details how the air is increasingly being polluted, the water systems ...
  • Land, Sea and People in the New Millennium. 

    Unknown author (Sancor, 2000)
    The present study was undertaken to investigate the observation that dolorite and shale shores in the Transkei tended to have less algal cover and to support more grazers than sandstone shores. The structure of rocky ...
  • Land-Based Activities, Pollution Sources and Levels in Water and Sediment in the Coastal and Marine Area of Kenya:draft report. 

    Munga, D.; Mwangi, S.; Kamau, J.; Nguli, M.; Gwada, P.; Daudi, L.; Ong'anda, H.; Mwaguni, S.; Massa, H.; Tole, M.; Onyari, J.; Makopa, J.; Gachanja, A.; Opello, G.; Kheir, A.; Machua, S. (Kenya Marine and Fisheries Research InstituteMombasa, Kenya, 2006)
    Kenya has a land area of 580,000 km2 and lies astride the equator. It has a coastline bordering the Indian Ocean, which runs about 600 km long in a south-westerly direction with varying, marine and coastal wetlands rich ...
  • Langjährige Pegelaufzeichungen im Río Magdalena (Kolumbien). 

    Kaufmann, R.; Reichelt, W. (INVEMAR, Santa Marta (Colombia), 1967)
    Se informa sobre mediciones fluviométricas realizadas durante veinte años en el curso inferior del Río Magdalena. El nivel inferior anual se presenta en marzo, el nivel superior de aguas en los meses noviembre/diciembre. ...
  • Las langostas chinas (Crustacea: Decapoda: Scyllaridae) del Caribe colombiano 

    Navas-S., G.R.; Campos-C., N.H. (Santa Marta (Colombia), INVEMAR, 1998)
    Se registran seis especies de langostas chinas (Crustaceae: Scyllaridae) del Caribe colombiano y se incluyen una diagnosis de cada una y una clave para su identificación. De estas, cuatro se registran por primera vez para ...
  • Las langostas chinas (Crustacea: Decapoda: Scyllaridae) del Caribe colombiano 

    Campos C., N. H.; Navas S., G. R. (INVEMAR, Santa Marta (Colombia), 1998)
    Se registran seis especies de langostas chinas (Crustaceae: Scyllaridae) del Caribe colombiano y se incluyen una diagnosis de cada una y una clave para su identificación. De estas, cuatro se registran por primera vez para ...