Search for dissertations about: "Southeast Africa"

Showing result 1 - 5 of 19 swedish dissertations containing the words Southeast Africa.

2. 1. Evaluation of suitable nursery areas for penaeid shrimps in shallow water systems in southern Mozambique

   Author : Daniela de Abreu; Göteborgs universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Tropics; Southeast Africa; Shallow water; Estuaries; Nursery ground value; Decapods; Penaeidae; Carbon and nitrogen isotopes; Diet; Acetyl cholinesterase; Butyryl cholinesterase; Metals;

   Abstract : Tropical shallow water habitats such as estuaries, mangrove forests and seagrass beds are important nursery areas for juveniles of many commercially important species including penaeid shrimp. Penaeids are one of the most important fishery resources worldwide, and in Mozambique they are the basis of a profitable commercial fishery, landing hundreds of tons per year. READ MORE

4. 2. Geological development of the East African coastal basin of Tanzania

   Author : Samson Mpanda; Ole Veibaeck; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Marine Geology; seismic methods; seismic stratigraphy; multichannel seismic recordings; tectonic development; Karoo; Mesozoic; Tertiary; East Africa; Tanzania; Earth sciences; Geovetenskap; allmän och historisk geologi; General and Historical Geology;

   Abstract : The East African coastal basin of Tanzania, which is characterised by an extensional tectonic style, is located along the passive continental margin of the western Indian Ocean. The present study is concerned with the Mafia Island and the Mafia Channel which together form a subbasin within the north-south elongated coastal sedimentary basin of Tanzania. READ MORE

5. 3. Patterns of fish larvae and zooplankton distribution in mangrove-seagrass seascapes of East Africa

   Author : Barnabas Alphonce Tarimo; Martin Gullström; Monika Winder; Mats Björk; Gunilla Rosenqvist; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fish larvae; zooplankton; population dynamics; community structure; environmental variables; seasonal variation; habitat use; mangroves; seagrass meadows; seascape connectivity; Tanzania; western Indian Ocean; marin ekologi; Marine Ecology;

   Abstract : Mangroves and seagrass meadows create coastal seascapes acting as breeding and nursery grounds for many fish species in tropical areas. Despite increased awareness on the role of these coastal habitats to fish, less knowledge is given to fish larvae distribution and population dynamics, limiting the understanding of major drivers of fish population dynamics and fisheries resources management, particularly in understudied regions such as the Western Indian Ocean. READ MORE

6. 4. Capture-based mud crab (Scylla serrata) aquaculture and artisanal fishery in East Africa- Practical and ecological perspectives : Mud crab ecology and aquaculture

   Author : David Oersted Mirera; Per-Olav Moksnes; Olof Linden; Max Troell; Lewis Le Vay; Linnéuniversitetet; []
   Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Mud crab; ecology; aquaculture; economics; Akvatisk ekologi; Aquatic Ecology;

   Abstract : Mud crab Scylla serrata is a crustacean that spends most of its life cycle in the mangrove environment throughout its range. Fishery and aquaculture of this crab are significant economic activities in coastal areas in the tropics and sub-tropics because of the meat quality and nutritional value. READ MORE

7. 5. Bush Encroachment and the Role of Browse in Cattle Production : An ecological perspective from a bush encroached grazing system, Olifants Drift, Kgatleng District, Southeast Botswana

   Author : Nkobi Moleele; Norman Owen-Smith; Stockholms universitet; []
   Keywords : savannas; bush encroachment; carrying capacity; browse; biomass; range degradation; colour infrared photographs; Landsat Thematic Mapper; mid infrared bands; tannins; toxins; aromatic substances; Dicrostachys cinerea; Grewia flava; NDVI; Olifants Drift; Botswana; naturgeografi; Physical Geography;

   Abstract : The increase in density and cover of woody plant species is coincident with the introduction of cattle in southern Africa, and it is a wide spread phenomenon in the savannas of the world. The causes are little understood, but can only be speculated to be either anthropogenic or natural or a combination of both. READ MORE