Mass dynamics of wintering Pacific Black Brant: body, adipose tissue, organ, and muscle masses vary with location

摘要: We compared body size and mass of the whole body, organs, adipose tissue, muscles adult Pacific Black Brant (Branta bernicla nigricans (Lawrence, 1846)) collected concurrently in Alaska Baja California during fall, winter, spring 2002–2003. Head tarsal lengths males were similar between sites slightly larger for females than California. appear to operate under physiological bounds, but patterns nutrient allocation differ sites. Birds wintering lost amounts tissue early winter as birds gained late before migration. Masses flight mid-winter Seasonal deposition may, therefore, equally favor residency or long-distance Gonad liver masses increased not those California, suggesting may...