Mitchell Guist, left, and his brother Glenn, from "Swamp People.” (Zach Dilgard/History Channel/AP)

Mitchell Guist, an alligator hunter and cast member from the History Channel reality show “Swamp People,” died Monday in Louisiana, the Associated Press reports. He would have turned 49 Friday.

Guist fell while on his boat Monday and was taken to a hospital, where he was pronounced dead, the AP reports. According to 911 tapes obtained by WBRZ in Baton Rouge, the caller believed Guist had suffered from a seizure and cardiac arrest.

An official cause of death has not been released.

“We are extremely saddened to report that our friend and beloved member of the ‘Swamp People’ family, Mitchell Guist, passed away earlier today,” a message posted to the show’s Web site said. “Mitchell passed on the swamp, doing what he loved. We appreciate your respect for the Guist family’s privacy and hope you join us in sending our thoughts and prayers to his brother, Glenn, and the rest of the Guist family.”