气候变化领域集成服务门户(CCPortal): Distribution, density and abundance of Antarctic ice seals off Queen Maud Land and the eastern Weddell Sea

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.864582
	Distribution, density and abundance of Antarctic ice seals off Queen Maud Land and the eastern Weddell Sea
	Gurarie; Eliezer; Bengtson; John L; Bester; Marthán N; Blix; Arnoldus Schytte; Cameron; Michael; Bornemann; Horst; Nordøy; Erling; Plötz; Joachim; Steinhage; Daniel; Boveng; Peter
发布日期	2016-09-13
数据集类型	dataset
英文简介	The Antarctic Pack Ice Seal (APIS) Program was initiated in 1994 to estimate the abundance of four species of Antarctic phocids: the crabeater seal Lobodon carcinophaga, Weddell seal Leptonychotes weddellii, Ross seal Ommatophoca rossii and leopard seal Hydrurga leptonyx and to identify ecological relationships and habitat use patterns. The Atlantic sector of the Southern Ocean (the eastern sector of the Weddell Sea) was surveyed by research teams from Germany, Norway and South Africa using a range of aerial methods over five austral summers between 1996-1997 and 2000-2001. We used these observations to model densities of seals in the area, taking into account haul-out probabilities, survey-specific sighting probabilities and covariates derived from satellite-based ice concentrations and bathymetry. These models predicted the total abundance over the area bounded by the surveys (30°W and 10°E). In this sector of the coast, we estimated seal abundances of: 514 (95 % CI 337-886) x 103 crabeater seals, 60.0 (43.2-94.4) x 103 Weddell seals and 13.2 (5.50-39.7) x 10**3 leopard seals. The crabeater seal densities, approximately 14,000 seals per degree longitude, are similar to estimates obtained by surveys in the Pacific and Indian sectors by other APIS researchers. Very few Ross seals were observed (24 total), leading to a conservative estimate of 830 (119-2894) individuals over the study area. These results provide an important baseline against which to compare future changes in seal distribution and abundance.
空间范围	Median Latitude: -69.290911 * Median Longitude: -14.873661 * South-bound Latitude: -73.899833 * West-bound Longitude: -45.550500 * North-bound Latitude: -62.062833 * East-bound Longitude: 4.330100
时间范围	1970-01-01T00:00:00 - 2001-01-12T14:55:12
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/215392
推荐引用方式 GB/T 7714	Gurarie,Eliezer,Bengtson,et al. Distribution, density and abundance of Antarctic ice seals off Queen Maud Land and the eastern Weddell Sea.2016-09-13.https://doi.org/10.1594/PANGAEA.864582.