The Franz Josef Land population of the Atlantic walrus (Odobenus rosmarus rosmarus) remains one of the least studied. Here, 26 walruses were tagged with satellite-linked radio transmitters in Franz Josef Land archipelago and Victoria Island in summer-autumn 2020 and 2021 to assess movements patterns and area utilization. In addition, 65 grab samples were taken to evaluate macrobenthic foraging resources. The mean duration of data records was 53 ± 27 days. The walruses traveled on average 29 ± 13.5 km/day with a mean speed of 1.2 ± 0.6 km/hr. The travel speed and distance were statistically different for male, female, and immature walruses. The individuals tagged on Victoria Island remained in the vicinity of the island, while walruses tagged within the Franz Josef Land archipelago moved between the islands, utilizing the entire area for foraging trips. One walrus migrated from Franz Josef Land to Novaya Zemlya in late November, providing evidence of connectivity with the Kara-Barents Sea population. The area was characterized by high average biomass of macrobenthos. Bivalve mollusks, Hiatella arctica, were dominating macrobenthic biomass, likely being the main foraging resource for the walruses. Further observations are needed to better understand winter behaviors of Franz Josef Land walruses and possible impacts of climate change on movement patterns.

中文翻译：

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法兰士约瑟夫地群岛大西洋海象（Odobenus rosmarus rosmarus）的运动模式和觅食资源以及与喀拉-巴伦支海种群的联系

法兰士约瑟夫地群岛的大西洋海象（Odobenus rosmarus rosmarus）种群仍然是研究最少的种群之一。2020 年夏秋季节和 2021 年夏秋节，法兰士约瑟夫地群岛和维多利亚岛的 26 只海象被卫星连接的无线电发射器标记，以评估其活动模式和区域利用情况。此外，还采集了 65 个样本来评估大型底栖动物觅食资源。数据记录的平均持续时间为 53 ± 27 天。海象平均每天行走 29 ± 13.5 公里，平均速度为 1.2 ± 0.6 公里/小时。雄性、雌性和幼年海象的移动速度和距离存在统计学差异。在维多利亚岛上标记的个体仍然留在该岛附近，而在弗朗茨约瑟夫地群岛内标记的海象在岛屿之间移动，利用整个区域进行觅食旅行。11 月底，一只海象从法兰士约瑟夫地群岛迁徙到新地岛，这提供了与喀拉-巴伦支海种群存在联系的证据。该地区的特点是大型底栖动物的平均生物量较高。双壳类软体动物Hiatella arctica在大型底栖动物生物量中占主导地位，可能是海象的主要觅食资源。需要进一步观察，以更好地了解法兰士约瑟夫地群岛海象的冬季行为以及气候变化对运动模式可能产生的影响。