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首页> 外文期刊>Avian Conservation and Ecology >Mallard Use of Hen HousesTM in Eastern Ontario
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Mallard Use of Hen HousesTM in Eastern Ontario

机译：绿头鸭在安大略省东部使用母鸡之家TM

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摘要

Nesting structures for ground-nesting waterfowl may be an effective technique for increasing nesting success in regions in which nest success is below the 15% threshold needed to maintain a stable population. We studied the occupancy rate of artificial nesting structures called hen housesTM by Mallards (Anas platyrhynchos) nesting in two different wetland habitats, beaver ponds and sewage lagoons, in eastern Ontario during 1999–2001. We hypothesized that, because natural cover was sparse on sewage lagoons, Mallards would occupy hen houses at a higher rate on sewage lagoons than on beaver ponds. However, of the 248 hen houses distributed between beaver ponds and sewage lagoons, none was occupied by waterfowl. Common Grackles (Quiscalus quiscula) were the only avian species that nested in hen houses. However, Mallards successfully nested directly under several structures (n = 6) when water levels were low enough to expose the ground beneath them. Mayfield daily nest survival estimates for Mallards nesting in natural cover were similar on sewage lagoons and beaver ponds for all years (mean = 0.99) and were higher than most published estimates. Factors such as nesting cover, predation pressures, and structure design and material may influence the use of artificial hen houses and should be considered when planning a hen house program outside of the Prairie Pothole Region.
机译：地面嵌套水禽的嵌套结构可能是一种有效的技术，可以在嵌套成功率低于维持稳定种群所需的15％阈值的区域内提高嵌套成功率。我们研究了1999-2001年在安大略省东部的两个不同的湿地生境（海狸池塘和污水泻湖）中筑巢的绿头鸭（Anas platyrhynchos）人工筑巢结构的使用率。我们假设，由于污水泻湖上的自然覆盖稀疏，因此野鸭在污水泻湖上的家禽居住率要比在海狸池塘高。然而，在海狸池塘和污水泻湖之间分布的248间鸡舍中，没有一个被水禽占据。普通Gra鸟（Quiscalus quiscula）是唯一筑巢在鸡舍中的鸟类。然而，当水位低到足以露出它们下面的地面时，绿头鸭就成功地直接筑巢在几个结构下（n = 6）。梅菲尔德（Mayfield）对自然掩盖的野鸭筑巢的每日巢生存估计数在所有年份的污水泻湖和海狸池塘上均相似（平均值= 0.99），并且高于大多数公开的估计数。诸如嵌套盖，捕食压力，结构设计和材料等因素可能会影响人工鸡舍的使用，在规划草原坑洼地区以外的鸡舍计划时应考虑这些因素。

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