Size, mass, and occurrence of gastroliths in juvenile Steller sea lions (Eumetopias jubatus)

被引：1
|
作者：
Shuert, C. R. [1 ,2 ]
Mellish, J. E. [1 ,2 ]
机构：
[1] Univ Alaska Fairbanks, Sch Fisheries & Ocean Sci, 905 N Koyukuk Dr,245 ONeill Bldg, Fairbanks, AK 99775 USA
[2] Alaska SeaLife Ctr, Res Dept, 301 Railway Ave, Seward, AK 99664 USA
来源：
JOURNAL OF MAMMALOGY | 2016年 / 97卷 / 02期
关键词：
buoyancy; digestion; Eumetopias jubatus; gastrolith; Steller sea lion; PREDATION; PINNIPEDS;
D O I：
10.1093/jmammal/gyv211
中图分类号：
Q95 [动物学];
学科分类号：
071002 ;
摘要：
Gastroliths, or stones found in the digestive tract of some pinnipeds, were gathered (n = 128) from temporarily captive juvenile Steller sea lions (n = 23, Eumetopias jubatus) at the Alaska SeaLife Center and characterized by their size and mass. Blubber depth and season were significant predictors of gastrolith mass and also positively associated with larger animals. From this, we conclude that they are likely actively ingested for a functional use rather than incidental.
引用
收藏
页码：639 / 643
页数：5
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