Fig. 1.
The Chad Basin Located in Africa
Major water features:
| Lakes: | Lake Chad (1) |
| Rivers & Channels: | Benue (2) Chari (3) El Beid (4) Gongola (5) Logomatia (6) Logone (7) Yobe (8) |
| Floodplain: | Grand Yaere (9) |
Fig.2.
The Conventional Limits of the Chad Basin in Detail
| PRE-DROUGHT | DROUGHT | POST-DROUGHT | |
| LAKE CHAD DETAILS: | |||
| PHYSICAL FORM Mean size Biotypes | 20,000km2 Open water | 10,000km2 Open water/Swamp | >10,000km2 Swamps |
| LANDINGS Mean Range Catch diversity | 30,000t/yr 15–50,000t/yr High | 150,000t/yr 90–200,000t/yr Low | 50,000t/yr 15–90,000t/yr Low |
| FISHING EFFORT Total CPUE | Low Medium | High V.High | High Medium-Low |
| GEAR USED Diversity | High | Low | Low |
| MANAGEMENT & REGULATIONS | Traditional Jurisdiction | None | None |
| COMMERCIAL ACTIVITY | Low (increasing) | High | High |
Fig.3.
Fisheries Production in the Chad Basin 1960–1987
Fig. 4.
Commercial Trade in Chad Basin Fish: Major Markets
in Nigeria 1969–1976
