Spawning by lake sturgeon (Acipenser fulvescens) in the Detroit River
Spawning by lake sturgeon (Acipenser fulvescens) in the Detroit River
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湖鲟（Acipenser fulvescens）在底特律河产卵
DOI：
10.1111/j.1439-0426.2004.00499.x
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发表时间：
2004
影响因子：
0.9
通讯作者：
G. Kennedy
中科院分区：
文献类型：
--
作者：
N. Caswell;D. Peterson;B. Manny;G. Kennedy
总结
1900 年代初期的过度捕捞和栖息地破坏导致五大湖的湖鲟 (Acipenser fulvescens) 种群遭到严重破坏。尽管密歇根州自然资源部最近起草了针对该物种的综合恢复战略，但由于缺乏五大湖鲟鱼种群的最新数据，恢复工作受到阻碍。从历史上看，底特律河是五大湖中最大的湖鲟种群之一。然而，人们对目前的种群或其栖息地的利用知之甚少。这项研究的主要目的是确定湖鲟是否在底特律河中产卵。作为一项更大规模研究的一部分，2000 年春夏和 2001 年春夏，人们使用诱饵钓线捕获底特律河中的湖鲟。在研究的每一年，超声波发射器都通过外科手术植入 10 条成年鱼体内，以跟踪它们的活动、评估栖息地利用情况并确定可能的产卵地点。使用遥测和蛋垫来验证产卵活动，在底特律河找到并验证了一个产卵地点。通过回收沉积在固定在现场的卵收集垫上的鲟鱼卵来验证产卵情况。遥测数据表明还可能存在其他几个可能的产卵地点，但是这些地点的产卵活动尚未得到验证。
Summary
Overfishing and habitat destruction in the early 1900s devastated lake sturgeon (Acipenser fulvescens) populations in the Great Lakes. Although a comprehensive restoration strategy for this species was recently drafted by the Michigan Department of Natural Resources, a lack of current data on Great Lakes sturgeon stocks has hindered rehabilitation efforts. Historically, the Detroit River supported one of the largest lake sturgeon populations in the Great Lakes; however, little is known about the current population or its habitat use. The main objective of this study was to determine if lake sturgeon spawns in the Detroit River. As part of a larger study, baited setlines were used to capture lake sturgeon in the Detroit River in the spring and summer of 2000 and 2001. In each year of the study, ultrasonic transmitters were surgically implanted in 10 adult fish to track their movements, evaluate habitat use and identify possible spawning sites. Using telemetry and egg mats to verify spawning activity, one spawning site was located and verified in the Detroit River. Spawning was verified by recovering sturgeon eggs deposited on egg collection mats anchored at the site. Telemetry data suggested that several other possible spawning sites also may exist, however, spawning activity was not verified at these sites.