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首页> 外文期刊>International journal of applied mechanics >Do Geese Facilitate or Compete with Wintering Hooded Cranes (Grus monacha) for Forage Resources?
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Do Geese Facilitate or Compete with Wintering Hooded Cranes (Grus monacha) for Forage Resources?

机译：鹅促进或竞争越冬连帽起重机（Grus Monacha）用于牧草资源吗？

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Foraging is the key behavior of waterbirds, which profoundly affects the survival of their population, and it is affected by interspecific interaction. At Shengjin Lake in China, owing to the reduced availability of suitable habitats for a large population of migratory waterbirds (especially wild geese) over winter, mixed species foraging inevitably occurs. This study aimed to investigate whether mixed-species foraging affects the foraging of hooded cranes (Grus monacha). Fields surveys were carried out at Shengjin Lake from November 2018 to March 2019. Mixed-species foraging was surveyed between the flocks of hooded cranes and three species of geese, greater white-fronted geese (Anser albifrons), lesser white-fronted geese (Anser erythropus) and bean geese (Anser fabalis). Instantaneous scanning and focal animal methods were used to collect behavioral samples of hooded cranes. The quadrat method was used to survey the food density in three habitats: meadows, mudflats, and paddy fields. The results showed that the foraging success rate of hooded cranes was not significantly correlated with food density and the relative flock size in the mixed-species foraging flock in meadows, but a significant negative correlation with the relative flock size in mudflats. However in paddy fields it was a significant positive correlation with the relative flock size. Foraging efforts of hooded cranes were negatively correlated with food density and positively correlated with the relative flock size in meadows. In mudflats, foraging efforts of hooded cranes had a significant positively correlation with the relative flock size, however, there was a significant negative correlation with the relative flock size in paddy fields. To sum up, larger numbers of geese mixed with hooded cranes has a favorable effect on the foraging of hooded cranes in meadows and mudflats, however, the reverse was observed in the paddy fields.
机译：觅食是水鸟的关键行为，这深受其人口的生存，它受到间隙的影响。在中国的胜金湖，由于冬季大量迁徙水鸟（特别是野鹅）的合适栖息地减少了适当的栖息地，混合物种觅食不可避免地发生。本研究旨在调查混合物种的觅食是否会影响连帽起重机的觅食（Grus Monacha）。在2018年11月到2019年11月，在胜金湖开展了田间调查。混合物种觅食是在卷轴起重机的群和三种鹅，大白前鹅（Anser Albifrons）之间进行调查，较小的白头鹅（Anser红豆果和豆鹅（Anser Fabalis）。使用瞬时扫描和焦产动物方法来收集连帽起重机的行为样本。 Quadrat方法用于调查三种栖息地的食物密度：草地，泥滩和稻田。结果表明，连帽起重机的觅食成功率与草地上的混合物种中的食物密度和相对植绒大小明显相关，但在泥浆中与相对植绒大小的显着负相关。然而，在稻田中，它与相对植绒大小是一个显着的正相关。连帽起重机的觅食努力与食物密度呈负相关，并与草地上的相对植绒大小呈正相关。在Mudflats中，连帽起重机的觅食努力与相对植绒大小具有显着的正相关性，然而，与稻田中的相对植绒大小存在显着的负相关性。总而言之，与连帽起重机混合的大量鹅对草甸和泥板的戴头巾起重机的觅食具有有利影响，然而，在稻田中观察到反向。

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