Brent Goose Colonies near Snowy Owls: Internest Distances in Relation to Breeding Arctic Fox Densities

S. P. Kharitonov; B. S. Ebbinge; J. de Fouw

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Brent Goose Colonies near Snowy Owls: Internest Distances in Relation to Breeding Arctic Fox Densities

机译：雪猫头鹰附近的布伦特鹅殖民地：与繁殖北极狐密度有关的有趣距离

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It was shown that in the years when the numbers of the Arctic foxes are high, even though the lemming numbers are high as well, Brent geese nest considerably closer to owls' nests than in the years with low Arctic fox numbers. At values of the Arctic fox densities greater than one breeding pair per 20 km2, the factor of lemming numbers ceases to affect the distance between owl and geese nests. This distance becomes dependent on the Arctic fox density (numbers). When the Arctic fox density is greater than the pronounced threshold, the owlBrent internest distance is inversely and linearly related to the Arctic fox density.

机译：研究表明，在北极狐数量较高的年份，尽管旅鼠的数量也很高，但与北极狐数量较低的年份相比，布伦特鹅的巢穴更接近猫头鹰的巢穴。当北极狐的密度值每20 km2大于一对繁殖对时，旅鼠的数量因子将不再影响猫头鹰与鹅巢之间的距离。该距离取决于北极狐的密度（数字）。当北极狐的密度大于明显的阈值时，owlBrent内部距离与北极狐的密度成反比和线性关系。

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《Biology Bulletin》 |2013年第1期|45-51|共7页
作者
S. P. Kharitonov; B. S. Ebbinge; J. de Fouw;
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Russian Bird Ringing Center, Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences,Moscow, 117312 Russia;

Center for Ecosystem Studies, Alterra Wageningen University, P.O. Box 47 NL-6700 AA Wageningen, the Netherlands;

Netherlands Institute of Ecology (NIOO-KNAW), P.O.Box 1299, 3600 BG Maarssen, the Netherlands;

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Brent Goose Colonies near Snowy Owls: Internest Distances in Relation to Breeding Arctic Fox Densities

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