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DETAILED SCIENTIFIC PROGRAMME
Click on the Abstract Title to view abstract.
Monday February 18, 2002
Tuesday, February 19, 2002
Wednesday February 20, 2002
| Monday February 18, 2002 |
| 8:45 - 9:00 |
|
Welcome: M. Munawar, M. van der Knaap |
| 9:00 - 9:30 |
01 |
Plenary Address 1a and 1b:
Managing the fisheries of the
Great Lakes: Acting on the complexities of reality
I.G. Cowx (U.K.)
Session 1a: Lake Victoria Ecosystems, Water quality, Food
Web & Exotics
Chair: M. van der Knaap
|
| 9:30 - 9:50 |
02 |
The importance
of atmospheric sources to the nutrient loading of Lake Victoria
Hecky, R.E., Mugidde, R., Tamatama, R.
|
| 9:50 - 10:10 |
03 |
Nutrient enrichment
in Lake Victoria, a cause for concern
Sitoki, L., Gichuki, J.
|
| 10:10 - 10:30 |
04 |
Changes in limnological
parameters in Lake Victoria waters - East Africa
Ezekiel, C. N., Budeba, Y. L., MacLennan, D.
|
| 10:30 - 10:50 |
05 |
Heterogeneity
of planktonic nutrient status and algal biomass in Lake Victoria
(E. Africa)
Mugidde, R., Hecky, R.E., Taylor, W.D.
|
| 10:50 - 11:10 |
|
Coffee/tea break |
| 11:10 - 11:30 |
06 |
The diversity
and abundance of invertebrates in Lake Victoria (Uganda) and
implications for fish production
Mwebaza-Ndawula, L., Kiggundu, V., Gandhi, W.P.
|
| 11:30 - 11:50 |
07 |
Zooplankton species
composition and diversity in southern part of Lake Victoria
Waya, R.K., Mhitu, H.A., Chande, A., Kishe, M.A., Kulekana,
J.J. |
| 11:50 - 12:10 |
08 |
Diets, selective
feeding and the structure of the zooplankton community assemblage
at the river - lake interface: predatory impact by the zooplanktivorous
Rastrineobola argentea and the juvenile Lates niloticus
Owili, M.A., Omondi, R. |
| 12:10 - 12:30 |
09 |
Lake Victoria
basin wetlands deserve more management attention than they have
had so far
Bugenyi, F.W.B. |
| 12:30 - 12:50 |
10 |
Ecological observations on a rapid and dramatic
macrophyte succession in the Nyanza Gulf of Lake Victoria
Gichuki, J., Omondi, R., Mutune, D.M., Ogari. J. |
| 12:50 - 2:00 |
|
Lunch |
|
Continuation of Session 1a: Lake Victoria
Ecosystem
Water quality, Food Web and Exotics
Chair: R.J.S. Ogutu-Ohwayo
|
| 2:00 - 2:20 |
11 |
Factors influencing
proliferation of water hyacinth in Lake Victoria, Uganda
Wanda, F.M., Twongo, T.K. |
| 2:20 - 2:40 |
12 |
Distribution of
water hyacinth in Uganda, its control and impacts of control
measures
Twongo, T.K. |
| 2:40 - 3:00 |
13 |
Analyses and modelling
of impacts of artisanal gears and climate on the commercial
exploitation of Lake Victoria (K) fish resource for management
decision Options
Othina, A.N., Cowx, I.G. |
| 3:00 - 3:20 |
14 |
Concentration of
heavy metals in water, fish and sediments of the Winam Gulf,
Lake Victoria, Kenya
Tole, M.P., Shitsama, J. M. |
| 3:20 - 3:40 |
|
Tea Break |
| 3:40 - 4:00 |
15 |
Habitat related
species diversity in Lake Victoria ciclids: effects of water
transparency and oxygen concentration
Witte, F., Wanink, J.H., Seehausen, O., Goldschmidt, T. |
| 4:00 - 4:20 |
16 |
Conservation
of fish species and trophic diversity in the Victoria and Kyoga
Lake basins through protection of satellite lakes and refugia
Namulemo, G., Mbabazi, D. |
| 4:20 - 4:40 |
17 |
Evolution and
Importance of the tilapia fishery in Lake Victoria with suggestions
for its sustainability
Balirwa, J.S |
| 4:40 - 5:30 |
|
Posters and discussion |
| 9:00 - 9:30 |
01 |
Plenary Address 1a and 1b:
Managing the fisheries of the Great Lakes: acting on the complexities
of reality
I.G. Cowx (U.K.)
PARALLEL Session 1b: Lake Victoria Ecosystem
Fisheries and Aquatics
Chair: P.O.J. Bwathondi
|
| 9:30 - 9:50 |
02 |
The distribution,
abundance and population structure of the fish stocks in the
Uganda portion of Lake Victoria with options for their management
Okaronon, J.O. |
| 9:50 - 10:10 |
03 |
Response of fish
populations to predation, fishing and environmental impacts,
pressures and changes in food webs: Lessons from Lake Victoria
(East Africa)
Ogutu-Ohwayo, R.J.S., Balirwa, R., Mugidde, R., Ndawula, L.M. |
| 10:10 - 10:30 |
04 |
Diet expansion
retains food web complexity after species reduction in the sublittoral
fish community of Lake Victoria
Wanink, J.M., Katunzi, E.F.B., Witte, F., Zoutendijk, J., Joordens,
J.C.A.
|
| 10:30 - 10:50 |
05 |
The nutritional
status of fishing communities on Lake Victoria, Uganda
Nyapendi, A.T. |
| 10:50 - 11:10 |
|
Coffee/tea break |
| 11:10 - 11:30 |
06 |
Status of selected
fish taxa in relation to conservation of their genetic and species
diversity in the Victoria and Kyoga basin lakes
Mwanja, W.W. |
| 11:30 - 11:50 |
07 |
The effect of overfishing
and other environmental factors of the life history styles of
Nile tilapia Oreochromis niloticus (L) in the Nyanza Gulf of
Lake Victoria, Kenya
Ojuok, J.E., Ntiba, M.J., Njiru |
| 11:50 - 12:10 |
08 |
Conservation of
Oreochromis esculentus in the Lake Victoria and Kyoga
Lake basins
Nagayi, K.J.F., Ogutu-Ohwayo, R. |
| 12:10 - 12:30 |
09 |
Growth and mortality
of dagaa, Rastrineobola argentea (Pellegrin 1904) in Lake Victoria,
Kenya
Nyaundi, J.K. |
| 12:30 - 12:50 |
10 |
Survival of the
Lake Victoria Rastrineobola argentea (Pellegrin 1904) in a rapidly
changing environment: Biotic and abiotic interactions
Manyala, J.O., Ojuok, J.E. |
| 12:50 - 2:00 |
|
Lunch |
|
Continuation of Session 1b: Lake Victoria
Ecosystem
Fisheries and Aquatics
Chair: R. Mugidde
|
| 2:00 - 2:20 |
11 |
Fish farming development
in the Lake Victoria catchment area of Tanzania: NGO's input
in providing extension services
Bwathondi, P.O.J., Mahika, C.G., Shoko, A.P.A., Onyango, P.O. |
| 2:20 - 2:40 |
12 |
The potential of
mukene (Rastrineobola argentea) fishery in Lake Victoria with
suggestions for its management
Wandera, S.B., Wabulya, F. |
| 2:40 - 3:00 |
13 |
Effect of mesh regulation
on Nile Tilapia, Oreochromis niloticus (L.) fishery in
Lake Victoria
Asila Atonga, A. |
| 3:00 - 3:20 |
14 |
Management of
the fisheries of Lake Victoria through control of fishing effort,
gears and fishing methods
Kamanyi, J.R., Muhoozi, L.I. |
| 3:20 - 3:40 |
|
Coffee/tea break |
| 3:40 - 4:00 |
15 |
Principles and
process of fisheries co-management in the Lake Victoria, Tanzania
Onyango, P.O. |
| 4:00 - 4:20 |
16 |
Co-management: the
perceptions of Lake Victoria's fish processing industries in
Uganda, Kenya and Tanzania
Gonga, J. |
| 4:20 - 4:40 |
17 |
Aquaculture Strategy
for restoration of threatened Lake Victoria fishes: the case
for Oreochromis variabilis (Boulenger, 1906) and Labeo
victorianus (Boulenger, 1901)
Charo, H., Maithya, J., Okeyo-Owuor,J. B., Wangila, B.C.C.,
Hoggren, M., Dannewitz, J., Carlsson, M. |
| 4:40 - 5:30 |
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Posters and discussion |
|
| Tuesday February 19, 2002 |
 |
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Chair: M. Munawar
|
| 9:00 - 9:30 |
01 |
Plenary address:
Tanzania, country of biodiversity
Bwathondi, P.O.J.
Session 2: Lake Malawi Ecosystem
|
| 9:30 - 9:50 |
02 |
Fish, Physics
and Farming: What controls nitrogen dynamics in Lake Malawi?
Bootsma, H.A., Mwichande, B., Mwita, J., André, E., Higgins,
S., Hecky, R., Vollmer, M., Weiss, R. |
| 9:50 - 10:10 |
03 |
Spatial and
temporal distribution of some commercially important fish species
in the southeast arm of Lake Malawi: A geostatistical analysis
Kanyerere, G.Z. |
| 10:10 - 10:30 |
04 |
How many species
of cichlid fishes are there in African lakes?
Turner, G.F. |
| 10:30 - 10:50 |
05 |
The cichlid diversity
of Lake Malawi/Nyasa/Niassa: identification, distribution and
taxonomy
Snoeks, J. |
| 10:50 - 11:10 |
|
Coffee/tea break |
| 11:10 - 11:30 |
06 |
Population structure
in the demersal cichlids of Lake Malawi
Taylor, M.I., Shaw, P., Verheyen, E. Carvalho, G. |
| 11:30 - 11:50 |
07 |
Population biology
of the catfish Bagrus meridonalis from the southern part of
Lake Malawi
Banda, M.C. |
| 11:50 - 12:10 |
08 |
Abundance, biomass
and estimated production of planktonic ciliates in Lakes Victoria
and Malawi
Yasindi, A.W., Taylor, W.D. |
| 12:10 - 12:30 |
09 |
Gear and species
selectivity of the gill net fishery in Lake Malawi
Sipawe, R.D. |
| 12:30 - 12:50 |
10 |
Traditional fishing
gears and species selectivity in Lake Malawi
Manase, M.M. |
| 12:50 - 1:10 |
11 |
Lessons from Malawi's
experience with fisheries co-management
Hara, M., Donda, S., Njaya, F. |
| 1:10 - 2:10 |
|
Lunch |
| 2:10 - 2:30 |
12 |
Stable natural
isotope ratios (15N, 13C)
elucidate the food web structure in the pelagial zone of Lake
Tanganyika
Sarvala, J., Bedende, S., Chitamwebwa, D., Juvonen, P., Mwape,
L., Mölsä, H., Mulimbwa, N., Salonen, K., Tarvainen,
M., Vourio, K. |
| 2:30 - 2:50 |
13 |
Climate variability
as recorded in Lake Tanganyika (CLIMLAKE)
Plisnier, P.-D., Descy, J.-P., Alleman, L., Andre, L., Chitamwebwa,
D., Cocquyt, C., Deleersnijder, E., Naithani, J., Phiri, H.,
Vyverman, W. |
| 2:50 - 3:10 |
14 |
Effect of wind
inducted water movements on nutrients, chlorophyll a and primary
production in Lake Tanganyika
Langenberg, V.T., Sarvala, J., Roijackers, R. |
| 3:10 - 3:30 |
15 |
Spatial distribution
of phytoplankton in Lake Tanganyika
Vuorio, K. |
| 3:30 - 3:50 |
|
Coffee/tea break |
| 3:50 - 4:10 |
16 |
Fish diversity of
the Lake Tanganyika drainage: An overview
De Vos, L. |
| 4:10 - 4:30 |
17 |
Direct and indirect
effects of sedimentation on gastropods in the rocky littoral
zone of Lake Tanganyika
Michel, E., McIntyre, P., France, K. |
| 4:30 - 4:50 |
18 |
Endemic crabs and
anthropogenic sedimentation in Lake Tanganyika, East Africa
Marijnissen, S., Michel, E. |
| 4:50 - 5:30 |
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Poster Presentations |
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| Wednesday February 20, 2002 |
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Chair: R. Hecky
|
| 9:00 - 9:30 |
01 |
Plenary Address: Importance
of the microbial shunt in food webs of the Laurentian Great
Lakes
Heath, R.T., Munawar, M.
Session 4: North American and other Great Lakes
|
| 9:30 - 9:50 |
02 |
From phytoplankton
to microbial food web of the Laurentian Great Lakes: status
and synthesis
Munawar, M., Munawar, I.F., Lynn, D., Legner, M., Weisse,
T., Niblock, H., Carou, S. |
| 9:50 - 10:10 |
03 |
Disruption of the
benthic food-web in Lake Ontario: Consequences on native fishes
Owens, R.W., Dittman, D.E. |
| 10:10 - 10:30 |
04 |
A 5.0 MA year record
of vegetation of climate changes from Lake Baikal rift basin,
East Siberia, Russia
Bezrukova, E., Kulagina, N., Letunova, P., Krapivina, S. |
| 10:30 - 10:50 |
|
Coffee/tea break |
| 10:50 - 11:10 |
05 |
Decline of Barbus
stocks in Lake Tana, Ethiopia: Is their reproductive success
affected by fisheries?
De Graaf, M., Nentwich, E., Sibbing, F.A., Machiels, M., Lemma,
A., Wudneh, T. |
| 11:10 - 11:30 |
06 |
Small pelagic barbs:
major resource in the ecosystem of Lake Tana (Ethiopia)
Dejen, E., Sibbing, F.A. |
| 11:30 - 11:50 |
07 |
Status of exotic
invasive species on Lake Kariba
Mhlanga, W |
| 11:50 - 12:10 |
08 |
The zooplankton
community structure of Lake Turkana, Kenya
Malala, J.O., Tackx, M., Fiers, F., Daro, N. |
| 12:10 - 1:10 |
|
Lunch |
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Session 5: Fisheries Management
Chair: M.J. Ntiba
|
| 1:10 - 1:30 |
09 |
Conservation
and management of Lake Victoria indigenous fish diversity: what
are the issues?
Seehausen, O. |
| 1:30 - 1:50 |
10 |
Illegal, unreported
and unregulated fishing on Lake Victoria
Van Der Knaap, M. |
| 1:50 - 2:10 |
11 |
The future of change:
roles, dynamics and functions for fishing communities in the
management of Lake Victoria's fisheries
Geheb, K., Medard, M., Kyangwa, M., Lwenya, C., |
| 2:10 - 2:30 |
12 |
Co-management
in the Lake Victoria Fishery: realities, constraints and opportunities
in Kenya
Lwenya C., Abila, R. |
| 2:30 - 2:50 |
|
Coffee/tea break |
| 2:50 - 3:10 |
13 |
Socio-economic
implications of the fish exports in Uganda
Namisi, P.W. |
| 3:10 - 3:30 |
14 |
Partnership development:
Key stages for co-managerial achievement. The case of Lake Victoria,
Tanzania
Medard, M. |
| 3:30 - 3:50 |
15 |
Anthropogenically
inducted changes in a Kenyan mangrove ecosystem assessed by
application of remote sensing and Geographical Information Systems:
a case study in Gazi
Obade, P.T., Tack, J.F., De Wulf, R. |
| 3:50 - 4:50 |
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Plenary Session: Synthesis and Conclusions
Chairs: M. van der Knaap, M. Munawar,
Panel Discussion: R. Hecky, J. Sarvala, R. Heath, P.-D. Plisnier,
G.F. Turner |
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