‘Hedgehog’: a novel defensive posture in juvenile Amblyraja radiata
Abstract:Three cases of a novel defensive posture in the starry skate Amblyraja radiata are reported. The posture, termed ‘hedgehog’, is a graded response to contact by a diver and features a head‐up attitude with the belly oriented toward the diver, apposed pectoral disc margin, and presentation of the thorny, electrogenic organ‐equipped tail. This is the first description of defensive posture in any Rajiformes under natural conditions.
Document Type: Research Article
Publication date: February 1, 2006