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Spatiotemporal Variability and Sound Characterization in Silver Croaker Plagioscion squamosissimus (Sciaenidae) in the Central Amazon

機(jī)譯:中央亞馬遜銀SilverPlagioscion squamosissimus(Sciaenidae)的時空變異和聲音特征

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摘要

BackgroundThe fish family Sciaenidae has numerous species that produce sounds with superfast muscles that vibrate the swimbladder. These muscles form post embryonically and undergo seasonal hypertrophy-atrophy cycles. The family has been the focus of numerous passive acoustic studies to localize spatial and temporal occurrence of spawning aggregations. Fishes produce disturbance calls when hand-held, and males form aggregations in late afternoon and produce advertisement calls to attract females for mating. Previous studies on five continents have been confined to temperate species. Here we examine the calls of the silver croaker Plagioscion squamosissimus, a freshwater equatorial species, which experiences constant photoperiod, minimal temperature variation but seasonal changes in water depth and color, pH and conductivity.
機(jī)譯:背景魚類科(Sciaenidae)有許多種類,它們產(chǎn)生的聲音具有超快的肌肉,使游泳囊振動。這些肌肉在胚胎后形成,并經(jīng)歷季節(jié)性肥大-萎縮循環(huán)。該家族一直是眾多無源聲學(xué)研究的重點,以定位產(chǎn)卵聚集體的時空分布。手持時,魚會發(fā)出干擾聲,雄魚會在下午晚些時候聚集,并發(fā)出廣告叫聲以吸引雌魚進(jìn)行交配。先前對五大洲的研究僅限于溫帶物種。在這里,我們研究了淡水赤道物種黃花魚Plagioscion squamosissimus的光周期恒定,光溫變化最小,但水深和顏色,pH和電導(dǎo)率隨季節(jié)變化的現(xiàn)象。

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