Distribution of red drum spawning sites identified by a towed hydrophone array
Distribution of red drum spawning sites identified by a towed hydrophone array
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DOI：
10.1577/t03-209.1
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发表时间：
2008-03-01
影响因子：
1.4
通讯作者：
Holt, Scott A.
中科院分区：
文献类型：
--
作者：
Holt, Scott A.
有关鱼类产卵习性和栖息地的知识是渔业管理的重要组成部分。本文报告了使用拖曳式水听器阵列对墨西哥湾西部近岸的红石首鱼潜在产卵地点进行的调查。可以区分两类红鼓声音。其中之一是低频隆隆声，在大约 150 Hz 处有一个突出的能量峰值。另一种是由个体或小群红鼓发出的清晰可辨的叫声。在所有样带的大部分路段均检测到个体红拟石首鱼的叫声。每条横断面都有大片区域听不到近距离的鼓声，而且鼓声频率也很低（< 16 声/分钟）。在横断面的广泛集群和孤立事件中都检测到了叫声。鼓声鱼的分布表明，一些（如果不是大部分）产卵发生在广泛分散的个体中，而不是高度聚集的群体中。只有 7% 的 1 分钟摘要记录了高击鼓频率（>= 16 次/分钟），而且即使这些通常也只有少数人制作。大多数低击鼓率是由单条鱼产生的。根据声音产生的分布，红石首鱼显然在德克萨斯州中部海岸的近岸地区产卵。这项调查在空间上不够全面，不足以完全划定产卵区域，但它清楚地表明产卵活动是广泛的，而不是像早期作者所建议的那样集中在入口处。拖曳式水听器阵列的使用有望提供一种有效的方法来确定红石首鱼产卵区的全部范围及其繁殖策略。
Knowledge about fish spawning habits and habitats is an essential component of fisheries management. This paper reports on a survey of potential spawning sites for red drum Sciaenops ocellatus in the nearshore western Gulf of Mexico conducted using a towed hydrophone array. Two classes of red drum sounds could be distinguished. One was a low-frequency rumble with a prominent energy peak at approximately 150 Hz. ne other was a clearly distinguishable call made by individual or small groups of red drum. Calls of individual red drum were detected along most sections of all transects. There were extensive areas along each transect where no close drumming was heard and where drumming rates were primarily low (< 16 calls/min). Calls were detected in both extensive clusters and isolated occurrences along the transects. The distribution of drumming fish suggests that some, if not most, spawning takes place among widely dispersed individuals as opposed to highly aggregated groups. Only 7% of the 1-min summaries recorded high drumming rates (>= 16 calls/min), and even these typically were produced by only a few individuals. Most low drumming rates were produced by a single fish. Based on the distribution of sound production, red drum apparently spawn all along the nearshore region of the central Texas coast. This survey was not spatially comprehensive enough to fully delineate the spawning area, but it made clear that spawning activity is widespread and not concentrated at inlets, as has been suggested by earlier authors. The use of towed hydrophone arrays offers promise of an efficient means to determine the full extent of red drum spawning areas and their reproductive strategies.