首页> 外文期刊>Florida field naturalist: a semi-annual journal of the Florida Ornithological Society >A COMPARISON OF DIRECT AND FLIGHT-LINE COUNTSAT A WOOD STORK (Mycteria americana) COLONY INNORTH FLORIDA
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A COMPARISON OF DIRECT AND FLIGHT-LINE COUNTSAT A WOOD STORK (Mycteria americana) COLONY INNORTH FLORIDA

机译:木材鹳(美洲Mycteria)殖民地北佛罗里达州直接和飞行路线计数的比较

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摘要

Flight-line counts, in which adult birds are tallied as they fly in and outof a nesting colony, provide an alternative to direct counts of nesting wading birds. Inthis study, a Wood Stork (Mycteria americana) colony in Leon County, Florida, was mon-itored from 1997-2004 with multiple annual visits using both direct nest counts andflight-line counts. In 1999 a drought caused drying of the surrounding wetland, and thecolony was abandoned for two years, but returned in 2002. Both the flight-line and directcounts detected the colony abandonment, absence, and re-colonization. The direct countmethod was able to detect a smaller colony size after the re-colonization, which theflight-line counts did not detect due to greater within-season count variability and lowerstatistical power. The flight-line counts can detect changes of large magnitude andavoids any disturbance, so it may be a suitable technique for volunteers.
机译:飞行线计数是成年鸟在巢内飞出或飞出时都会被盘点的计数,为直接涉水涉禽提供了一种替代方法。在这项研究中,从1997年至2004年对佛罗里达州莱昂县的一只白鹳(美洲Mycteria)殖民地进行了监测,每年进行多次探访,并直接使用鸟巢计数和飞行路线计数。 1999年,干旱导致周围的湿地干燥,该殖民地被废弃了两年,但在2002年又回来了。飞行路线和直接计数都检测到了该殖民地的遗弃,缺席和重新殖民。重新计数后,直接计数方法能够检测到较小的菌落大小,由于季节内计数变化较大且统计能力较低,因此无法检测到飞行线计数。飞行路线计数可以检测到较大的变化并且避免了任何干扰,因此对于志愿者而言可能是一种合适的技术。

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