Canadian Journal of Fisheries and Aquatic Sciences, Ahead of Print.
Identifying how habitat structure influences the spatiotemporal movements of fishes is important for conservation, population assessment, and management purposes. Here, we determined whether acoustically tagged lake trout (Salvelinus namaycush) from a 305 ha lake exhibited homing behaviour and lake basin fidelity over multiple seasons and years. The lake has two distinct deep basins (north and south) connected by a shallower centre basin. Fifteen lake trout captured during the spawning season from both deep basins were tagged and released in the south basin. All translocated north-basin fish quickly returned to the north basin (median = 1.85 days, range = 0.36–4.5 days), apart from one fish that returned 41 days post-release, while none from the south ventured into the north basin during this time. After translocated individuals returned, all fish demonstrated high basin fidelity among years, as >90% of detections were from the same basin fish were captured, while <0.7% (by three fish) were from the opposite deep basin and <9% from the centre basin. The probability a fish was detected outside its basin of capture was highest in winter (15.9%) and fall (14.3%) and lowest in summer (0.41%).

中文翻译：

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北部一个小湖中湖鳟 (Salvelinus namaycush) 的盆地保真度和归巢率高

加拿大渔业和水生科学杂志，印刷前。
确定栖息地结构如何影响鱼类的时空运动对于保护、种群评估和管理目的很重要。在这里，我们确定了来自 305 公顷湖泊的声学标记的湖鳟 (Salvelinus namaycush) 在多个季节和年份中是否表现出归巢行为和湖盆保真度。该湖有两个不同的深盆地（北部和南部），由较浅的中心盆地连接。在产卵季节从两个深盆地捕获的 15 条湖鳟被标记并在南部盆地释放。除一条鱼在放归后 41 天返回外，所有转移的北盆地鱼类都迅速返回北盆地（中位数 = 1.85 天，范围 = 0.36-4.5 天），而在此期间没有来自南方的鱼冒险进入北盆地时间。易地人员返回后，多年来，所有鱼类都表现出较高的盆地保真度，因为 > 90% 的检测来自同一盆地鱼类，而 <0.7%（三条鱼）来自对面的深盆地，<9% 来自中心盆地。一条鱼在其捕捞盆地外被检测到的概率在冬季（15.9%）和秋季（14.3%）最高，夏季最低（0.41%）。