https://doi.org/10.82144/653dfc45 https://seamap.env.duke.edu/dataset/74 https://www.gbif.org/dataset/2f12f211-ccdc-46c3-9d9e-00d155ddd6af https://obis.org/dataset/aa3069f6-e00d-4e5a-b740-e93fc1eb0f47 David Hyrenbach Duke University Marine Laboratory Primary contact khyrenba@u.washington.edu http://www.nicholas.duke.edu/people/faculty/hyrenbach.html OBIS-SEAMAP Marine Geospatial Ecology Lab, Duke University

A328 LSRC building Durham NC 27708 US

seamap-contact@duke.edu https://seamap.env.duke.edu OBIS-SEAMAP Marine Geospatial Ecology Lab, Duke University

A328 LSRC building Durham NC 27708 US

seamap-contact@duke.edu https://seamap.env.duke.edu distributor David Hyrenbach Duke University Marine Laboratory Primary contact khyrenba@u.washington.edu http://www.nicholas.duke.edu/people/faculty/hyrenbach.html owner 2025-07-31 eng Original provider: Duke University Marine Laboratory Dataset credits: Duke University Marine Laboratory Abstract: Four female and one male black-footed albatross (<i>Phoebastria nigripes</i>) were tracked using satellite telemetry during their post-breeding summer dispersal (July - September, 1997-1999). The females were tracked using transmitters that operated continuously, and the male was tracked using a duty-cycled transmitter programmed to transmit on 7-day ON:OFF cycles. Marine Biology Telemetry Tagged animal Black-footed albatross Phoebastria nigripes Post-breeding dispersal Satellite telemetry North Pacific albatrosses Radio transmitters Animal movements N/A These telemetry data were collected through the Argos system, using Telonics ST-10 transmitters (Telonics, Mesa, AZ) programmed to operate on a 90-second repetition rate. Bench-mark tests before transmitter deployment revealed the following median positional errors (in km) for different Argos location quality classes: 1.47 (lc0), 0.77 (lc1), 0.50 (lc2), 0.30 (lc3), 1.86 (lcA), 7.26 (lcB). Class B locations reached errors of up to 50 km. After removing low-quality class B locations the dataset contained 34.81% (lc0), 24.13% (lc1), 11.97% (lc2), 5.52% (lc3), 23.57% (lcA). <br><br> For further information, please refer to the references associated with this dataset. This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC) 4.0 License. https://seamap.env.duke.edu/dataset/74 Oceans,California Current,Pacific Ocean,North Pacific Transition Domain -156.273 -116.259 43.373 23.303 1997-07-10 1999-09-20 Scientific names are based on the Integrated Taxonomic Information System (ITIS). species Phoebastria nigripes Black-footed albatross Albatross movements and foraging grounds during the post-breeding dispersal are poorly understood, despite their important conservation implications. We tracked four female black-footed albatross (<i>Phoebastria nigripes</i>) for 100 days during their summer (July-September, 1997-1999) post-breeding dispersal off California, and compared their movements to the distribution of fishing effort from the Japanese Eastern Pacific Ocean (EPO) longline fishery. The tracked birds foraged largely along the transition zone between the California Current and the Central Pacific Gyre, and spent 25, 24, and 51% of their time at sea within the 200 mile exclusive economic zones (EEZs) of the USA and Mexico, and the high seas (international waters) respectively. The satellite-tracked birds occupied subtropical waters (18-20 °C) targeted by longline fisheries for tuna (<i>Thunnus</i> spp.) and broad-bill swordfish (<i>Xiphias gladius</i>), and ranged disproportionately farther during daylight hours, when tuna fisheries operate. The available data suggest that albatrosses overlap temporally and spatially with longline fisheries in the northeast Pacific Ocean. However, this research cannot directly evaluate whether black-footed albatross bycatch occurs in these fisheries. The coarse temporal (monthly) and spatial (1°×1°) resolution of the fisheries data, and the dynamic nature of the fishing effort inhibited a fine-scale analysis of albatross overlap with longline fisheries. While we documented substantial spatial overlap between albatross distributions and the Japanese Eastern Pacific Ocean longline fishing effort during the 1980s, we found no co-occurrence during the 1990s. This study illustrates the value of satellite telemetry to assess national conservation responsibilities, and to identify potential interactions of protected species with fisheries not currently monitored by observer programs. Furthermore, our results underscore the need to exercise caution when interpreting satellite telemetry data for conservation purposes, because of the highly dynamic nature of pelagic fisheries. notPlanned David Hyrenbach Duke University Marine Laboratory Primary contact khyrenba@u.washington.edu http://www.nicholas.duke.edu/people/faculty/hyrenbach.html NA NA NA David Hyrenbach owner NA zd_74 2025-07-31T14:03:48-04:00 dataset Hyrenbach, D. 2012. Duke Albatross 1997-1999. Version 1.0.0. Dataset published in OBIS-SEAMAP. https://doi.org/10.82144/653dfc45. OBIS-SEAMAP Dataset Page UTF-8 Interactive map https://seamap.env.duke.edu/dataset/74 FGDC Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/74/fgdc EML Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/74/eml OBIS-SEAMAP zd_74 zd_74 Hyrenbach, K.D. and R.C. Dotson. 2003. Assessing the susceptibility of female black-footed albatross (Phoebastria nigripes) to longline fisheries during their post-breeding dispersal: An integrated approach. Biological Conservation: 112: 391-404.