PORTO JOFRE, Brazil — When Oscar de Morais isn’t out tracking jaguars, you’ll find him aboard his houseboat moored along the banks of the São Lourenço River. He sits beneath a mosquito net on two stacked blue plastic chairs, watching Brazilian soap operas while a fan blows warm air his way. That is, until someone … Continue reading In Brazil’s Pantanal, too many tourists may be the jaguar’s new predator