Paffen P. and E. Lyimo, 1996, Frame survey results for the Tanzanian coast of lake Tanganyika, March 1995, and comparison with past surveys. FAO/FINNIDA Research for the Management of the Fisheries on Lake Tanganyika. GCP/RAF/271/FIN-TD/49 (En): 36p.
In March 1995, 45 beach recorders from the Tanzanian Fisheries Department, Ministry of Tourism, Natural Resources and Environment, conducted a fishing village frame survey (FS) at the Tanzanian coast of Lake Tanganyika with help of LTR. Results were compared with historical data from annual statistics reports by the Fisheries Department.
The Tanzanian fleet consisted of 3,009 vessels in the Kigoma Region and 1,853 vessels in the Rukwa Region. In both regions there were approximately 76.2%, 20.4% and 3.5% (3,707 and 991 and 168) of fishing vessels, auxiliary boats (light boats) and transport vessels respectively. Fishing by wooden/planked canoes, catamarans, dugout canoes, trimarans and industrial units was 60.3%, 25.4%, 12.3%, 0.4% and 0.1% (2,834 and 1,194 and 577 and 19 and 4) respectively.
The traditional fishery employed 6,747 hand lines, 2,917 gill nets, 410 long lines and 271 scoop nets. The artisanal fishery employed 1,158 liftnets, 496 beach seines and 4 Apollo liftnets. Four industrial units were observed. The highest concentrations of liftnets and industrial units, 760 and 3 respectively, were in the Kigoma Region. The highest concentration of beach seines, 280, was in the Rukwa Region.
Historical data as estimated from FS were available for the period 1967 to 1995. Between 1971 and 1983 the fishing fleet increased in size. From 1984 to the present the number of fishermen remained relatively constant, on average 13,760, but at a lower level than in 1983, 16,558, while the number of fishing vessels declined rapidly to a value employed before 1972. These observations probably reflected the change from a fishery mainly based on traditional fishing methods, using one boat, to one predominantly based on artisanal fishing methods utilizing catamarans. In particular the use of traditional scoop nets and gill nets declined to 5% and 7% respectively of the maxima recorded in the last 22 years. The employment of artisanal liftnets has steadily increased since the first records in 1977.
Incomplete, historical data as estimated from CAS were available for the period between 1950 and 1992. The total catch increased rapidly during 1983-1985 (on average 107,143 MT per year) to more than twice the total annual weight caught in 1978-1982 (on average 41,418 MT per year). This was caused in particular by the expanding artisanal fisheries. The contribution of the total industrial catch during these years was negligible, <0.5% of the total catch.
The following recommendations are made:
(1) a different CAS system should be used,
(2) the annual statistics report by the Fisheries Department should be more specific,
(3) the type of fishing vessel and the number of fishing nights per type should be given,
(4) the Fisheries Department should collect data on annual catches from industrial fishing companies operating on Lake Tanganyika and
(5) an adequate budget should be available for Tanzania to carry out monthly CAS and annual FS.