Aquatic






        Dr. Benaiah Benno
Researches /Studies undertaken
\r\n6.1 Study on the features of Beach seine fishery along the coast of Dar es\r\nSalaam, Tanzania\r\nYear: 1992\r\nMain features of the study: Beach seine fishing is illegal because it is

\r\nnon selective to fish with respect to size and destroys the bethic\r\nenvironment yet it was a very common type of the fishing methods along\r\nthe dare s salaam coast in spite of the fact that it was illegal.

\r\nActivities performed: Enumeration of beach seine units in the area, its\r\nimportance as an employer,

determination of fish species caught and their\r\npopulation characteristics in terms of species diversity, size and maturity\r\nstructure, amount of fish landed, fishing season and environmental issues.

\r\n6.2 Title: Study on the movements habitat use, trophic status and fishery of\r\n‘Ningu’ Labeo

victorianus in the Speke Gulf of Lake Victoria, Tanzania.\r\nYear: 2000\r\nMain study feature: Labeo victorianus is one of the potamodromous\r\nfish of lake Victoria which are now threatened by bad fishing practices,\r\npredation from Nile perch and destruction of their breeding grounds in\r\nrivers.

\r\n4\r\nActivities performed: Study of movements of Ningu through\r\ntagging, their reproductive biology, habitat use and fisheries

\r\n6.3 Title: Investigations on the aquatic fauna of Eastern Arc Mountains in\r\nUsambara, Tanzania\r\nYear: 2005-2007\r\nLocation: Amani, Muheza, Tanga, Tanzania\r\nMain study feature: The gold rush by artisanal miners using mercury\r\nfor gold

amalgamation in the Eastern Usambara area was likely\r\nto impact on aquatic fauna and humans utilizing the aquatic\r\nfauna as food.\r\nActivities performed:

Investigations on the aquatic fauna of Eastern\r\nUsambara rivers and speculation on the likely impacts of the small\r\nscale gold rush prospecting activities on the aquatic fauna in the area

\r\n6.4 Pangani River Health Assessment\r\nLocation: Pangani River Basin, Tanzania

\r\nYear: 2006-2008\r\nClient: Ministry of Water and Irrigation and IUCN Water and Nature\r\nInitiative, Pangani Basin water Office\r\nMain project feature: Pangani River traverses through many areas\r\nand its water is utilized for domestic,

industrial and irrigation such\r\nthat is flow is very much reduced to sustain environmental\r\nrequirements. In addition along the way the river also receives some\r\nurban and

industrial effluents which affects the water quality and the\r\nlife of aquatic organisms. The river is also dammed at Nyumba ya\r\nMungu, Hale and Makinyumbi in Lower Pangani and has an estuary

\r\nsupporting peculiar organisms other than the typical riverine species.\r\nPositions held: Member of the Study team, specialist in Fish biota\r\nActivities

performed: Basin delineation and biological zonation,\r\nAssessment of fish and invertebrate fauna diversity in various reaches\r\nof the Pangani river, associated lakes and swamps, Identification of\r\nbiological requirements and critical habitat for important fish species,\r\nConstruction of fish response curves for various river flow\r\nscenarios and categorization of the river health status.

\r\n6.5 Zigi River health Assessment\r\nYear: 2010\r\nLocation: Zigi and Muzi river basins\r\nClient: Pangani Basin Water office, Moshi, Tanzania\r\nMain Project feature: Zigi and Muzi rivers originate in highland\r\nareas where tea is grown and traverses in areas where sisal growing\r\nand decortation takes place before being dammed at Mabayani to

\r\ncreate a reservoir for the Tanga Municipal water supply. After the\r\ndam the river cascaded through very steep gorges before emptying

\r\n5\r\nits waters into the Indian ocean at Amboni.\r\nPosition held: Head of research team and fisheries expert\r\nActivities: Basin delineation and biological zonation, Assessment\r\nfish species and invertebrate fauna diversity in various reaches\r\nof the Zigi, Kihuhwi and Muzi rivers, Mabayani dam and Amboni\r\nestuary.

Identification of biological requirements and critical\r\nhabitat for important fish species, Construction of fish response\r\ncurves for various river flow scenarios.
  
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