The distribution, density and percentage contribution of pack ice seals during ship-board censuses in the marginal sea ice zone beyond the Lazarev Sea in spring 2019 are presented. Adult/juvenile crabeater seals (n = 19), leopard seals (n = 3) and Ross seals (n = 10) were sighted during 582.2 nm of censuses along the ship’s track line in the area bounded by 00°00’–22°E and 56°–60°S. Antarctic fur seals (n = 21) were only encountered on the outer fringes of the pack ice, and Weddell seals were absent due to their primary use of fast ice and inner pack ice habitats close to the coast. Crabeater seal sightings included juveniles (n = 2) and another four groups of 2–3 unclassified crabeater seals, singletons (n = 5), single mothers with pups (n = 3) and a family group (n = 1 triad). Only one leopard seal attended a pup, while no Ross seal pups were located. The survey was likely of insufficient effort, in both extent (north of 60°S) and duration (18 days), to locate seals in considerable numbers this early (late October/early November) in their austral spring breeding season.

中文翻译：

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春季横跨拉扎列夫海的南极冰封观测

介绍了 2019 年春季拉扎列夫海以外边缘海冰区的船载普查期间浮冰海豹的分布、密度和百分比贡献。成年/幼年食蟹海豹（n= 19), 豹海豹 (n= 3) 和罗斯海豹 (n= 10) 在 00°00'–22°E 和 56°–60°S 范围内沿船舶航迹线的 582.2 海里的普查中被发现。南极海狗 (n= 21）只在浮冰的外缘遇到，而威德尔海豹由于主要使用靠近海岸的快冰和内浮冰栖息地而没有出现。捕蟹海豹目击事件包括幼体（n= 2) 和另外四组 2-3 只未分类的食蟹海豹，单身 (n= 5), 有幼崽的单身母亲 (n= 3) 和一个家庭组 (n= 1 个三元组）。只有一只豹海豹照顾了一只幼崽，而没有发现罗斯海豹幼崽。该调查可能在范围（60°S 以北）和持续时间（18 天）方面都没有足够的努力，未能在今年早些时候（10 月下旬/11 月初）在它们的南方春季繁殖季节找到相当数量的海豹。