To examine the loss of seabirds (cryptic mortality) during a typical pelagic longline fishing trip, seabird ‘surrogates’ were manually attached to longline hooks under controlled conditions during a typical pelagic longline fishing operation. A single bird was attached to each hook in one of three ways. Almost all the surrogates were retained on retrieval of the gear. This study provides information that will permit refinement of scalars for cryptic mortality associated with pelagic longlines.
AEBR 268 Improving estimates of cryptic mortality for use in seabird risk assessments: loss of seabirds from longline hooks
Report - Aquatic Environment and Biodiversity (AEBR)