气候变化领域集成服务门户(CCPortal): Crabeater seals (Lobodon carcinophaga) in the Weddell Sea during DRE1998 campaign

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.854842
	Crabeater seals (Lobodon carcinophaga) in the Weddell Sea during DRE1998 campaign
	Nachtsheim; Dominik A; Jerosch; Kerstin; Hagen; Wilhelm; Plötz; Joachim; Bornemann; Horst
发布日期	2016-08-09
数据集类型	dataset
英文简介	The crabeater seal (Lobodon carcinophaga) is the most abundant Antarctic seal and inhabits the circumpolar pack ice zone of the Southern Ocean. Until now, information on important environmental factors affecting its distribution as well as on foraging behaviour is limited. In austral summer 1998, 12 crabeater seals of both sexes and different age classes were equipped with satellitelinked dive recorders at Drescher Inlet (72.85°S, 19.26°E), eastern Weddell Sea. To identify suitable habitat conditions within the Weddell Sea, a maximum entropy (Maxent) modelling approach was implemented. The model revealed that the eastern and southern Weddell Sea is especially suitable for crabeater seals. Distance to the continental shelf break and sea ice concentration were the two most important parameters in modelling species distribution throughout the study period. Model predictions demonstrated that crabeater seals showed a dynamic response to their seasonally changing environment emphasized by the favoured sea ice conditions. Crabeater seals utilized ice-free waters substantially, which is potentially explained by the comparatively low sea ice cover of the Weddell Sea during summer 1998. Diving behaviour was characterized by short (>90 % = 0-4 min) and shallow (>90 % = 0-51 m) dives. This pattern reflects the typical summer and autumn foraging behaviour of crabeater seals. Both the distribution and foraging behaviour corresponded well with the life history of the Antarctic krill (Euphausia superba), the preferred prey of crabeater seals. In general, predicted suitable habitat conditions were congruent with probable habitats of krill, which emphasizes the strong dependence on their primary prey.
空间范围	Median Latitude: -71.624400 * Median Longitude: -19.330648 * South-bound Latitude: -75.798000 * West-bound Longitude: -47.604000 * North-bound Latitude: -65.135000 * East-bound Longitude: 55.483000
时间范围	1998-01-28T16:20:00 - 1998-05-29T01:24:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/215432
推荐引用方式 GB/T 7714	Nachtsheim,Dominik A,Jerosch,et al. Crabeater seals (Lobodon carcinophaga) in the Weddell Sea during DRE1998 campaign.2016-08-09.https://doi.org/10.1594/PANGAEA.854842.