Fallout from the Viacom media conglomerate's split into two companies has claimed its first victim in the person of senior executive Herb Scannell.

The MTV Networks vice chairman and president of Nickelodeon Network - which he helped build into the top kids' property on American television - is ending an 18-year career to "pursue other business opportunities". It is widely believed that Scannell had climbed the Viacom corporate ladder as high as he could go.

He is replaced by Cyma Zarghami, who becomes head of a newly created MTV Networks Kids and Family Group within the Viacom-monikered half of the split. Zarghami will oversee the portfolio of Nickelodeon channels and internet divisions.

Scannell announced that he "felt it was the right time to move to the next leadership position in my career", although he has not revealed any firm plans.

Data sourced from Wall Street Journal Online; additional content by WARC staff