SAN DIEGO — After patiently waiting decades for a trio of endangered Indian turtles to reproduce, San Diego Wildlife Alliance officials are celebrating the arrival of 41 hatchlings this summer. This marks the first successful captive breeding in North America of the Indian narrow-headed softshell turtles, a freshwater species native to the Indian subcontinent. The San Diego Zoo first acquired two young turtles back in 1997 amidst heightened concern over declining numbers of Asian turtles, which face threats such as habitat loss and water pollution, as well as demand from the international pet…