The European beaver (Castor fiber) has extended its range into most Central European countries over the past 30 years, resulting in increased forestry damage and water management issues. As the number of beavers increases populations become established in new types of habitat. In the Czech Republic, for example, established beaver populations are now found on rivers flowing through agricultural landscapes, where living conditions differ significantly to those found in forest landscapes. To date, there have been no studies on the impact of beavers on agricultural production. The aim of this study was (1) to describe how beavers graze field crops, and (2) to estimate potential damage to agricultural production. This 2-year study examined five beaver territories in agricultural landscapes where crops were separated from watercourses by a narrow strip of bank vegetation. Beavers fed on all crop types grown in their territories throughout the growing period (May–October), peaking from mid-June to mid-July. The beavers clearly preferred oilseed rape, which (along with wheat and barley) represented the largest part of the grazed area. Rape was usually grazed at during vegetation growth and flowering, while cereals were usually grazed from the milk ripe kernel stage to harvest. Damage to agricultural production was up to €20–30 per ind./year. While beaver population density in the agricultural landscape remains low, damage to agricultural production is relatively insignificant; however, field crops clearly represent an important part of the beavers’ diet in such areas, helping them survive in such open landscapes.

欧洲海狸（蓖麻纤维）在过去的30年中将其范围扩展到了大多数中欧国家，从而导致了更多的森林破坏和水资源管理问题。随着海狸数量的增加，在新的栖息地中建立了种群。例如，在捷克共和国，现在在流经农业景观的河流上发现了海狸种群，那里的生活条件明显不同于森林景观。迄今为止，还没有关于海狸对农业生产的影响的研究。这项研究的目的是（1）描述海狸如何放牧田间作物，以及（2）估计对农业生产的潜在损害。这项为期2年的研究考察了农业景观中的五个海狸领地，那里的农作物通过一条狭窄的河岸植被与水道隔开。海狸在整个生长期（5月至10月）以其领土上生长的所有农作物为食，高峰期从6月中旬到7月中旬。海狸显然更喜欢油菜（与小麦和大麦一起），是油菜面积的最大部分。油菜通常在植物生长和开花时放牧，而谷物通常是从牛奶成熟仁阶段到收获时放牧。对农业生产的损害高达每年每indd 20–30欧元。尽管农业景观中的海狸人口密度仍然很低，但对农业生产的损害相对较小。但是，在这些地区，大田作物显然是海狸饮食的重要组成部分，有助于它们在如此开阔的环境中生存。从6月中旬到7月中旬见顶。海狸显然更喜欢油菜（与小麦和大麦一起），是油菜面积的最大部分。油菜通常在植物生长和开花时放牧，而谷物通常是从牛奶成熟仁阶段到收获时放牧。对农业生产的损害高达每年每indd 20–30欧元。尽管农业景观中的海狸人口密度仍然很低，但对农业生产的损害相对较小。但是，在这些地区，大田作物显然是海狸饮食的重要组成部分，有助于它们在如此开阔的环境中生存。从6月中旬到7月中旬见顶。海狸显然更喜欢油菜（与小麦和大麦一起），是油菜面积的最大部分。油菜通常在植物生长和开花时放牧，而谷物通常是从牛奶成熟仁阶段到收获时放牧。对农业生产的损害高达每年每indd 20–30欧元。尽管农业景观中的海狸人口密度仍然很低，但对农业生产的损害相对较小。但是，在这些地区，大田作物显然是海狸饮食的重要组成部分，有助于它们在如此开阔的环境中生存。油菜通常在植物生长和开花时放牧，而谷物通常是从牛奶成熟仁阶段到收获时放牧。对农业生产的损害高达每年每indd 20–30欧元。尽管农业景观中的海狸人口密度仍然很低，但对农业生产的损害相对较小。但是，在这些地区，大田作物显然是海狸饮食的重要组成部分，有助于它们在如此开阔的环境中生存。油菜通常在植物生长和开花时放牧，而谷物通常是从牛奶成熟仁阶段到收获时放牧。对农业生产的损害高达每年每indd 20–30欧元。尽管农业景观中的海狸人口密度仍然很低，但对农业生产的损害相对较小。但是，在这些地区，大田作物显然是海狸饮食的重要组成部分，有助于它们在如此开阔的环境中生存。