David Leduc was named head of the global fixed-income team at Standish Mellon Asset Management, said spokesman Joseph F. Ailinger. Mr. Leduc will oversee the firm's global fixed-income, global credit and emerging markets debt strategies, with a combined $2.1 billion in assets under management. He will retain his responsibilities as head of global credit, his previous position. Mr. Leduc replaces Charles Dolan, who will remain with the firm. Mr. Ailinger said declining to comment further on Mr. Dolan's new responsibilities.