The Florida mottled duck (Anas fulvigula fulvigula) inhabits a relatively small range of approximately 90,000 km² within peninsular Florida, USA, and is threatened by habitat loss and genetic introgression with feral mallards (Anas platyrhynchos). Moreover, the Florida mottled duck population status has not been assessed for more than a decade. We used band‐recovery and recapture data from 2000–2013 to examine geographic and demographic factors that influence the survival of Florida mottled ducks and to determine whether survival and harvest probabilities have changed over time. Mean survival probabilities were higher for birds banded in the southern portion of their Florida range than for those banded in the northern portion and higher for adult males than for adult females in both areas. Harvest probabilities increased in the northern extent of its range in Florida for adults and juveniles and remained relatively constant in the southern portion of its range during the study period. Mean harvest probabilities for adult males in both areas were higher than for adult females. Mean harvest probability for juvenile females was higher than that for juvenile males in the north but was similar between the sexes in the south. Our results suggest that mortality rates are generally greater in the northern portion of the Florida mottled duck range because of regional differences in habitat distribution and permanence and in how mottled ducks and humans use wetlands in these areas. We suggest increasing conservation efforts in the north portion of the Florida mottled duck range and improving inferences from leg banding by incorporating live recapture data. © 2020 The Wildlife Society.

中文翻译：

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佛罗里达斑驳鸭的成活率和收获率的变化

佛罗里达斑驳的鸭子（Anas fulvigula fulvigula）栖息在美国佛罗里达州半岛约90,000 km ²的相对较小范围内，并受到栖息地丧失和野生野鸭遗传渗入的威胁（Anas platyrhynchos）。而且，佛罗里达斑驳鸭的种群状况已有十多年没有得到评估。我们使用2000-2013年的波段恢复和重新捕获数据来研究影响佛罗里达斑驳鸭生存的地理和人口因素，并确定生存和收获概率是否随时间变化。在这两个地区中，在佛罗里达州范围南部的带状鸟的平均生存概率高于在北部范围中的带鸟，成年雄性比成年雌性更高。在研究期间，佛罗里达州成年和少年的收获概率在其范围的北部增加，在其范围的南部部分保持相对恒定。在这两个地区，成年雄性的平均收获概率均高于成年雌性。在北部，少年女性的平均收获概率高于男性，但在南部性别之间相似。我们的结果表明，由于栖息地分布和永久性的区域差异以及斑驳鸭和人类在这些地区使用湿地的地区差异，佛罗里达斑驳鸭范围的北部地区的死亡率通常较高。我们建议在佛罗里达斑驳鸭场的北部增加保护工作，并通过结合实时捕获数据来改善从绑腿带得出的推论。©2020野生动物协会。我们的结果表明，由于栖息地分布和永久性的区域差异以及斑驳鸭和人类在这些地区使用湿地的地区差异，佛罗里达斑驳鸭范围的北部地区的死亡率通常较高。我们建议在佛罗里达斑驳鸭场的北部增加保护工作，并通过结合实时捕获数据来改善从绑腿带得出的推论。©2020野生动物协会。我们的结果表明，由于栖息地分布和永久性的区域差异以及斑驳鸭和人类在这些地区使用湿地的地区差异，佛罗里达斑驳鸭范围的北部地区的死亡率通常较高。我们建议在佛罗里达斑驳鸭场的北部增加保护工作，并通过结合实时捕获数据来改善从绑腿带得出的推论。©2020野生动物协会。