3 research outputs found
The vector potential of haemaphysalis longicornis ticks for babesia microti parasites under experimental condition
Survey of protozoan vector-borne diseases in dogs from Atlantic Rainforest fragment around Billings Dam, São Paulo, Brazil
To connect or not to connect?: floods, fisheries and livelihoods in the Lower Rufiji floodplain lakes, Tanzania
For seven years, village-based recorders monitored fish catches and water levels in seven floodplainassociated
lakes of the Lower Rufiji, Tanzania. The lakes differ in the number of days and volume of inflows from
the river, and thus provide a natural experiment to explore the links between catch composition, income per hour of
fishing (IPHF) and hydrological connectivity, and to analyse the response of the users. The fishers adapt their fishing
mode and equipment to achieve a rather constant IPHF of between 0.2 and 0.8 US$/fisher/hour. In situations
of low connectivity, during a series of drought years, the less well-connected lakes lost many species and became a
virtual monoculture of Oreochromis urolepis. Only in one extreme case was average fish size significantly reduced,
indicating a high fishing pressure. Catch was therefore highly resilient to shifts toward illegal, non-selective and
active fishing techniques. Fish diversity and lake productivity were quickly re-established when the larger lakes
reconnected. The potential impacts of changes in the flood hydrograph (through dams, increased abstraction or
climate/land-use changes) are assessed, and management options discussed