Montie E W, Kehrer C, Yost J, Brenkert K, O'Donnell T, Denson M R
Department of Natural Sciences, University of South Carolina Beaufort, One University Boulevard, Bluffton, SC 29909, U.S.A.
Marine Resources Research Institute, South Carolina Department of Natural Resources, P. O. Box 12559, Charleston, SC 29422-2559, U.S.A.
J Fish Biol. 2016 May;88(5):1776-95. doi: 10.1111/jfb.12938.
In the present study, quantitative data were collected to clarify the relationship between calling, call structure and eggs produced in a captive population of red drum Sciaenops ocellatus. Sciaenops ocellatus were held in four tanks equipped with long-term acoustic loggers to record underwater sound throughout a simulated reproductive season. Maximal sound production of captive S. ocellatus occurred when the photoperiod shifted from 13·0 to 12·5 h of light, and the water temperature decreased to c. 25° C. These captive settings are similar to the amount of daylight and water temperatures observed during the autumn, which is the primary spawning period for S. ocellatus. Sciaenops ocellatus exhibited daily patterns of calling with peak sound production occurring in the evenings between 0·50 h before dark and 1·08 h after dark. Spawning occurred only on evenings in which S. ocellatus were calling, and spawning was more productive when S. ocellatus produced more calls with longer durations and more pulses. This study provides ample evidence that sound production equates to spawning in captive S. ocellatus when calls are longer than 0·8 s and contain more than seven pulses. The fact that more calling, longer calls and higher sound pressure levels are associated with spawns that are more productive indicates that acoustic metrics can provide quantitative information on spawning in the wild.
在本研究中，收集了定量数据以阐明在圈养的红鼓鱼（Sciaenops ocellatus）种群中，鸣叫、叫声结构与产卵之间的关系。将红鼓鱼饲养在四个配备了长期声学记录器的水箱中，以记录整个模拟繁殖季节的水下声音。当光周期从13.0小时光照变为12.5小时光照，且水温降至约25°C时，圈养的红鼓鱼发出的声音最大。这些圈养条件类似于秋季观察到的日照时长和水温，而秋季是红鼓鱼的主要产卵期。红鼓鱼表现出每日鸣叫模式，声音产生的峰值出现在傍晚天黑前0.50小时至天黑后1.08小时之间。产卵仅发生在红鼓鱼鸣叫的夜晚，并且当红鼓鱼发出更多持续时间更长、脉冲更多的叫声时，产卵效率更高。这项研究提供了充分的证据，当叫声持续时间超过0.8秒且包含七个以上脉冲时，圈养的红鼓鱼发出声音等同于产卵。更多的鸣叫、更长的叫声以及更高的声压水平与更高产的产卵相关联，这一事实表明声学指标可以提供关于野生环境中产卵的定量信息。
