MARINELAND — The female dolphin calf born at Marineland Dolphin Adventure on July 12 has developed a respiratory problem and is in guarded condition, according to a Tuesday media release from the attraction.The calf's ailment is being investigated with further diagnostic testing. The mother, Casique, is in good health and is with her calf, the release state.The calf has had several days of successful nursing and appears to be getting milk, however her weight gain has not reached the expected growth curve.Marineland staff members are with Casique and the calf around the clock to care for and monitor their health.