WENDELLL ROELF A floating gas-turbine generator meant to alleviate South Africa's crippling power cuts has run into objections by oyster farmers and small-scale fishermen, who fear the environmental damage will destroy their livelihoods. The seafood sellers fear the 415 megawatt ship - to be moored for two decades at Saldanha Bay, 140 km north of Cape Town - will pump hot water into the bay and make endless noise, spoiling farmed oysters and scaring off fish as Africa's most industrialised country scrambles to fix electricity problems. Responding to complaints by the Green Connection environmental justice group, the South African government…