Final answer:
The indigenous fishing practices around Lake Titicaca likely played a role in preserving native species, demonstrated by the extinction of only one local species after the introduction of rainbow trout.
Step-by-step explanation:
The introduction of the rainbow trout to Lake Titicaca and its impact on local species can be connected to indigenous fishing practices and their importance today. The fact that only one local species went extinct despite the presence of rainbow trout suggests that indigenous practices helped preserve native species amidst environmental changes due to the introduction of the non-native fish species. This can be contrasted with other examples where introduced species, like the Nile perch in Lake Victoria, caused widespread extinction of native species due, in part, to a lack of such practices and increased fishing pressure.