Application of pop-up satellite archival tag technology to estimate postrelease survival of white marlin (Tetrapturus albidus) caught on circle and straight-shank (“J”) hooks in the western North Atlantic recreational fis

• Main Authors: Horodysky, Andrij Z., Graves, John E.
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2005
• Subjects: Biology; Ecology; Fisheries; Management; North Atlantic
• Online Access: http://hdl.handle.net/1834/26251

Short-duration (5- or 10-day) deployments of pop-up satellite archival tags were used to estimate survival of white marlin (Tetrapturus albidus) released from the westernNorth Atlantic recreational fishery. Forty-one tags, each recording temperature, pressure, and light level readings approximately every two minutes for 5-day tags (n= 5) or four minutes for 10-day tags (n= 36), were attached to white marlin caught with dead baits rigged on straight-shank(“J”) hooks (n =21) or circle hooks (n=20) in offshore waters of the U.S. Mid-Atlantic region, the DominicanRepublic, Mexico, and Venezuela. Forty tags (97.8%) transmitted data to the satellites of the Argos system,and 33 tags (82.5%) transmitted data consistent with survival of tagged animals over the deployment duration.Approximately 61% (range: 19−95%) of all archived data were successfully recovered from each tag. Survival wassignificantly (P<0.01) higher for white marlin caught on circle hooks (100%) than for those caught on straight-shank(“J”) hooks (65%). Time-to-death ranged from 10 minutes to 64 hours following release for the seven documented mortalities, and five animals died within the first six hours after release. These results indicate that a simple change in hook type can significantly increase the survivalof white marlin released from recreational fis