Foreign game bird liberations in the U.S., 1960-1978

These data were obtained by digitizing data from U.S. government reports on releases of foreign game bird. Records on 628 introductions of ring-necked pheasants in the United States between 1960 and 1978 were compiled. This data was used in the 2006 publication: Drake, J.M. 2006. Heterosis, the catapult effect, and establishment success of a colonizing bird. Biology Letters 2:304-307. doi:10.1098/rsbl.2006.0459 .

本数据集源自对美国政府关于外来猎用鸟类放生的报告数据的数字化处理。本数据集汇编了1960年至1978年间美国境内628次环颈雉（ring-necked pheasants）的引种记录。该数据集曾应用于2006年发表的一项学术研究：Drake, J.M. 2006.《杂种优势、弹射效应与拓殖鸟类的定殖成功率》，《生物学快报》（Biology Letters），2:304-307，DOI:10.1098/rsbl.2006.0459。