Intercolony variation in growth of black brant goslings on the Yukon‐Kuskokwim Delta, Alaska

摘要: ABSTRACT Recent declines in black brant (Branta bernicla nigricans) are likely the result of low recruitment. In geese, recruitment is strongly affected by habitat conditions experienced broods because gosling growth rates indicative forage during brood rearing and influence future survival productivity. 2006–2008, we studied at 3 4 major colonies on YukonKuskokwim Delta, Alaska. Estimates age-adjusted mass 2 southern (approx. 30% world population breeding brack) was (gosling 30.5 days ranged 346.7 ± 42.5 g to 627.1 15.9 g) comparison a third colony 640.0 8.3 821.6 13.6 most previous estimates goslings. Thus, our results consistent with hypothesis that poor negatively influencing population. There non-mutually exclusive explanations for apparent ra...