Status of Fall Chinook Salmon Populations in the Mid-Columbia River, 1948–1992
Status of Fall Chinook Salmon Populations in the Mid-Columbia River, 1948–1992
复制标题
1948-1992 年哥伦比亚河中部秋季奇努克鲑鱼种群状况
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
D. G. Watson
中科院分区：
文献类型：
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作者：
D. Dauble;D. G. Watson
摘要 历史上，秋季奇努克鲑鱼 Oncorhynchus tshawytscha 在哥伦比亚河主干流中产卵，距离约 900 公里。然而，由于水电开发和其他人类活动，大多数秋季奇努克鲑鱼上游种群的自然生产现在仅限于被称为汉福德河段的 90 公里长的河段。 1943 年至 1971 年间，邻近的汉福德核保护区用于生产核材料，这限制了许多开发活动，包括额外的水力发电项目。自 1948 年以来，对汉福德河段秋季奇努克鲑鱼的空中计数提供了产卵区域和年份之间相对丰度的指数。从 1948 年到 1961 年，每年产卵高峰期的雷德数量不足 1,000 只，但随着哥伦比亚河和斯内克河上几座主干水坝的修建，1989 年数量增加到 8,800 只。成年秋季奇努克鲑鱼逃逸至汉福德河段的平均...
Abstract Historically, fall Chinook salmon Oncorhynchus tshawytscha spawned in the main-stem Columbia River over a distance of approximately 900 km. However, because of hydroelectric development and other human activities, most natural production of upriver stocks of fall Chinook salmon (upriver bright, URB) is now restricted to a 90-km-long section of river known as the Hanford Reach. The adjacent Hanford Nuclear Reservation was managed for production of nuclear materials from 1943 to 1971, which restricted many development activities, including additional hydroelectric projects. Aerial counts of fall Chinook salmon redds since 1948 at the Hanford Reach provide an index of relative abundance among spawning areas and years. Redd counts during peak spawning were less than 1,000 annually from 1948 to 1961, but they increased to as high as 8,800 in 1989 following construction of several main-stem dams on both the Columbia and Snake rivers. Escapement of adult fall Chinook salmon to the Hanford Reach averaged...