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首页> 外文期刊>Ecology of Freshwater Fish >Spawning periodicity and synchrony of bluehead chub (Nocomis leptocephalus) and a nest associate, yellowfin shiner (Notropis lutipinnis), across local streams
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Spawning periodicity and synchrony of bluehead chub (Nocomis leptocephalus) and a nest associate, yellowfin shiner (Notropis lutipinnis), across local streams

机译：跨本地溪流的蓝麦满Chub（Nocomis Leptocephalus）和Nest Associate，Yellowfin Shiner（Notropis Lutipinnis）的巢助理的周期性和同步

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We studied daily spawning periodicity of a nest-building species, bluehead chub (Nocomis leptocephalus), and a nest associate, yellowfin shiner (Notropis lutipinnis), in three streams in the upper Piedmont region of South Carolina, USA. Field observations were conducted for 89 consecutive days in 2016 by recording the number of active nests and environmental variables. A total of 71 nests were located across study streams; bluhead chub and yellowfin shiner spawned between April and June. Spawning was observed periodically at intervals of 4-6 days within the same stream and across different streams, indicating broad-scale influences of the same environmental factors leading to synchrony. A generalized linear auto-regressive and moving average model showed that the periodic spawning pattern was likely caused by changes in water temperature, with effects of water level varying by stream. Specifically, spawning was triggered by a short-term (2-day) increase in water temperature and was observed under stable flow conditions (i.e. a lack of precipitation). This study showed that spawning periodicity of bluehead chub and yellowfin shiner tracked daily variation in in-stream conditions, indicating that their reproduction might be affected by anthropogenic disturbances that affect the rate of change in thermal and flow regimes at the fine temporal scale (e.g. hydroelectric dams and impervious cover).
机译：我们研究了筑巢物种，蓝头糖粉（Nocomis Leptocephalus）的每日产卵周期，以及美国南卡罗来纳州南卡罗来纳州上皮蒙特地区的三流。通过记录活动巢和环境变量的数量，2016年连续89天进行了现场观察。共有71个巢穴跨学习流;四月和六月在4月和六月突出了布鲁黑雪茄和黄鳍闪兵。在同一流内4-6天的间隔期观察产卵，并在不同的流中，表明相同环境因素导致同步的广泛影响。广义的线性自动回归和移动平均模型表明，周期性产卵模式可能是由水温变化引起的，水位随着流而变化的影响。具体而言，通过短期（2天）升高水温触发产卵，并在稳定的流动条件下观察（即缺乏沉淀）。本研究表明，蓝头糖浆和黄鳍闪光剂的产卵周期性地追踪了流动条件的日常变化，表明它们的繁殖可能受到影响在细时刻的热和流动制度的变化率（例如水电）的繁殖影响（例如水水电水坝和不透水覆盖。

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