The '59 film, The Killer Shrews, found a group of folks on an island with the ravenous beasts. This time James Best's ship captain is hired by a reality crew to return to the island and...you guessed it, the shrews attack again.
Imdb: http://www.imdb.com/title/tt1832447/Director: Steve Latshaw
Writers: James Best, Steve Latshaw
Stars: John Schneider, Bruce Davison, Jeneta St. Clair
Trailer: http://www.youtube.com/watch?v=czmdmltBeX0