Movements and depth/temperature distribution of the ectothermic Scombrid, Acanthocybium solandri (wahoo), in the western North Atlantic |
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Authors: | Tim C. Theisen John D. Baldwin |
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Affiliation: | 1. Biological Sciences, Charles E. Schmidt College of Science, Florida Atlantic University, 3200 College Avenue, Davie, FL, 33314, USA
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Abstract: | Pop-up satellite archival tags were deployed onto four wahoo during 2006 in the western North Atlantic (~26.5°N, 79.3°W), providing movement, depth, and temperature data collected over a total of 198?days. Straight-line distances between tag deployment and pop-off positions ranged from 162.5 to 1,960.0?km. Wahoo spent >90?% of their time in water <200?m, and >90?% of their time in water between 17.5 and 27.5?°C. Three fish made regular trips to depths >200?m. All four fish had significantly different depth distributions between the dark and light periods (Kruskal–Wallace test, p?0.001). The median mean depth for all fish combined was 29.7?m during the dark period (Q1?=?18.8?m, Q3?=?46.2?m) and 50.7?m during the light period (Q1?=?22.3?m, Q3?=?112.3?m). This research improves an otherwise poor understanding of wahoo movements and depth/temperature distributions and suggests potential interactions with other members of the pelagic fish community, many of which are commercially important and either fully or over-exploited. |
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