Another remarkable feature of the TSL food web is the transfer efficiency (TE) within its food chain. In TSL, the food web was more based on the detrital food chain than on the grazing food chain.By looking at the overall TE within the food web, we found low TE from TL II to TL III and then the TE started to increase significantly from TL III to higher TLs, which is in contrast with the African great lakes (i.e.: L. Victoria, Tanganyika, Malawi), where TEs declined dra-matically from TL III to higher TLs (Christensen and Pauly, 1993).This contrast drives us to point out the good utilization of fisheries resources in TSL for human consumption and predation instead of lacking exploitation as in the African lakes. Nevertheless, over exploitation of the fishery resources in the TSL was notified to fishing down the food chain, consequently dominated by small-sized fish;whereas a large proportion of primary production (macrophytes)was not well utilized in the ecosystem. This conclusion is consistent with the previous study of van Zalinge et al. (1998).
Another remarkable feature of the TSL food web is the transfer efficiency (TE) within its food chain. In TSL, the food web was more based on the detrital food chain than on the grazing food chain.By looking at the overall TE within the food web, we found low TE from TL II to TL III and then the TE started to increase significantly from TL III to higher TLs, which is in contrast with the African great lakes (i.e.: L. Victoria, Tanganyika, Malawi), where TEs declined dra-matically from TL III to higher TLs (Christensen and Pauly, 1993).This contrast drives us to point out the good utilization of fisheries resources in TSL for human consumption and predation instead of lacking exploitation as in the African lakes. Nevertheless, over exploitation of the fishery resources in the TSL was notified to fishing down the food chain, consequently dominated by small-sized fish;whereas a large proportion of primary production (macrophytes)was not well utilized in the ecosystem. This conclusion is consistent with the previous study of van Zalinge et al. (1998).
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