 The effects of whaling on the more abundant pygmy blue whales is less known, but they are no doubt depleted and are recovering slowly.Humpback whales from the New Zealand-Oceania stock were depleted to perhaps 150 whales due to illegal Soviet whaling; even today, they number only about 20% of their original numbers and are increasing slower than other humpback populations.Despite a mass illegal kill of over 1,300 southern right whales off the coast of Argentina in 1962, populations seem to be recovering well and today Argentina is home to the largest population of southern right whales in the world.