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首页> 外文期刊>Marine ecology progress series >Potential for grouper acoustic competition and partitioning at a multispecies spawning site off Little Cayman, Cayman Islands
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Potential for grouper acoustic competition and partitioning at a multispecies spawning site off Little Cayman, Cayman Islands

机译：在开曼群岛小开曼群岛附近的多物种产卵场，石斑鱼声学竞争和分区的潜力

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Many fishes produce calls during spawning that aid in species and mate recognition. When multiple sound-producing species inhabit an area, the detection range may decrease and limit call function. Acoustic partitioning, the separation of calls in time, space, or spectral frequency, can minimize interference among species and provide information about fish behavior and ecology, including possible response to increasing anthropogenic noise. We investigated acoustic partitioning among 4 sound-producing epinephelids, Nassau grouper Epinephelus striatus, red hind E. guttatus, black grouper Mycteroperca bonaci, and yellowfin grouper M. venenosa, using passive acoustic data collected at Little Cayman, Cayman Islands, during the spawning season of 2015 to 2017. We measured spectral and temporal features of 9 call types known or presumed to be produced by these fishes to assess frequency partitioning and call discrimination. We assessed call temporal and spatial partitioning using recordings from 2 locations. Differences among call features enabled good discrimination of Nassau grouper and red hind but not black and yellowfin grouper. The median peak frequencies of calls differed but bandwidths shared a common 13 Hz range, resulting in limited partitioning of spectral space. Red hind produced calls with higher frequencies than other species. Black grouper calling peaked before sunset whereas other species' calling peaked after sunset. Yellowfin grouper calling was prevalent north of other species, suggesting spatial separation. These results indicated separation in space and time between species calls, which aids in acoustic partitioning. When this separation did not occur, unique call structures were present, which may aid in effective intraspecies communication.
机译：许多鱼类在产卵时会发出叫声，从而有助于物种和配偶的识别。当多个发声物种居住在一个区域时，检测范围可能会减小并限制通话功能。声音划分，即时间，空间或频谱频率之间的呼叫分离，可以最大程度地减少物种之间的干扰，并提供有关鱼类行为和生态的信息，包括对人为噪声增加的可能响应。我们使用产卵季节在开曼群岛小开曼收集的被动声波数据，调查了4种产声音的phe鱼，拿骚石斑鱼Epinephelus striatus，红后E. guttatus，黑石斑鱼Mycteroperca bonaci和黄鳍石斑鱼M. venenosa之间的声音分配。在2015年至2017年期间。我们测量了这些鱼类已知或推测会产生的9种call鱼类型的频谱和时间特征，以评估频率划分和call鱼歧视。我们使用来自2个位置的录音评估了呼叫时空划分。通话功能之间的差异可以很好地区分拿骚石斑鱼和红后石斑鱼，而不能区分黑黄鳍石斑鱼。呼叫的中值峰值频率有所不同，但是带宽共享一个常见的13 Hz范围，从而导致频谱空间的分配受到限制。红色后裔发出的呼叫频率比其他物种更高。黑石斑鱼的叫声在日落之前达到顶峰，而其他物种的叫声在日落之后达到顶峰。黄鳍石斑鱼在其他物种的北部普遍存在，表明空间上的分隔。这些结果表明物种调用之间在空间和时间上的分离，这有助于声学分区。当没有发生这种分离时，就存在唯一的呼叫结构，这可能有助于有效的种内通信。

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