Little is known about the life-history traits exhibited by burbot (Lota lota) throughout their circumpolar range. Monitoring burbot movements between lentic and lotic habits and collection of demographic data (length, age, sex, and maturity) were used to answer the following questions in the Torrey Creek drainage of west-central Wyoming, USA: (a) is there plasticity in the life-history traits of the burbot population, (b) do Trail Lake origin and Torrey Creek origin burbot interchange during the spawning period, and (c) is there a difference in growth and age at sexual maturity between burbot captured in Trail Lake and Torrey Creek? Results indicated that burbot in Trail Lake and Torrey Creek exhibit plasticity in their life history traits. Directional movement of PIT-tagged burbot in Trail Lake and Torrey Creek was monitored nearly continuously by tandem stream-width antennas. Thirty-five percent of lentic-origin burbot migrated upstream into Torrey Creek, and 11% of lotic-origin burbot migrated downstream of the antennas near the Torrey Creek inlet to Trail Lake. Migratory activity of burbot was highest during the late winter and early spring at a time that coincided with spawning. Additionally, Torrey Creek-origin burbot were smaller and younger than Trail Lake-origin burbot. In addition to documenting migration, the sampling of small, sexually mature burbot in Torrey Creek suggests that stream-resident burbot reach maturity earlier than adfluvial and lacustrine burbot in Trail Lake. Furthermore, high catch rates of age-0 burbot indicate that Torrey Creek upstream from Trail Lake provides nursery habitat to the burbot population. Life history trait plasticity and spawning and nursery habitats documented in this study should be considered when selecting conservation actions for this unique burbot population.

中文翻译：

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Burbot (Lota lota) 在该物种原产地最西南端的一个小排水系统中表现出生活史特征的可塑性

对江豚（Lota lota）表现出的生活史特征知之甚少) 在它们的极地范围内。在美国怀俄明州中西部 Torrey Creek 排水系统中，通过监测 lentic 和 lotic 习性之间的江豚运动和人口统计数据（长度、年龄、性别和成熟度）的收集来回答以下问题：(a)江豚种群的生活史特征，(b) 在产卵期间，Trail Lake 起源和 Torrey Creek 起源的江豚交换，以及 (c) 在 Trail Lake 和托里溪？结果表明，Trail Lake 和 Torrey Creek 中的江豚在其生活史特征上表现出可塑性。在 Trail Lake 和 Torrey Creek 中带有 PIT 标签的江豚的定向运动几乎通过串联溪流宽度天线进行监测。35% 的河豚向上游迁移到 Torrey Creek，11% 的河豚从 Torrey Creek 入口附近的天线下游迁移到 Trail Lake。江鳕的迁徙活动在冬末和早春期间最高，恰逢产卵。此外，Torrey Creek 来源的江鳕比 Trail Lake 来源的江鳕更小更年轻。除了记录迁徙外，在托里溪对性成熟的小江鱼进行的采样表明，溪流中的江鱼比 Trail Lake 中的河流和湖泊的江鱼更早成熟。此外，0 龄江豚的高捕获率表明，Trail Lake 上游的 Torrey Creek 为江豚种群提供了苗圃栖息地。