BURAS – Thou Prum, 58, has been shrimping in Louisiana for more than 20 years. But he won’t let his kids get into the business. Neither will Thanh Le, 59, another shrimper. Nor Rondey Andry, 41. Nearly all of the shrimpers whose boats lined the docks in Buras, Louisiana, a downriver community in lower Plaquemines Parish whose lifeblood is commercial fishing, said they had forbidden their children from following in their footsteps.