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首页> 外文期刊>Marine ecology progress series >Predation rates of Indo-Pacific lionfish on Bahamian coral reefs
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Predation rates of Indo-Pacific lionfish on Bahamian coral reefs

机译：巴哈马珊瑚礁上印度洋-太平洋fish鱼的捕食率

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摘要

Indo-Pacific lionfish, mainly Pterois volitans, are currently invading coral reefs throughout the Caribbean region, where they have the potential to outcompete and prey upon a wide range of native reef animals. Here, we derive the first estimates of rates of predation by lionfish from field observations on natural reefs around New Providence, Bahamas. Although lionfish are reported to be crepuscular in their native range, they were very active during daylight hours. Lionfish were observed hunting at least 19 reef fish species, in at least 9 families. They hunted significantly more on overcast days and at greater depths, and frequently hunted near aggregations of fish at cleaning stations. Lionfish consumed native fish at an average rate of 1.44 kills h~(-1) (0.29 kills h~(-1) on clear days and 2.29 kills h~(-1) on overcast days). This estimate may be conservative if lionfish hunt also between dusk and dawn. This rate is considerably higher than the only known prey consumption rate for P. volitans, which is extrapolated from ad libitum feeding of fish from the native range. Our results imply that using published predation rates from the native range to predict the impacts of lionfish on native Caribbean fish could lead to severe underestimation of these impacts.
机译：印度太平洋的ion鱼（主要是翼手蕨）目前正在整个加勒比海地区入侵珊瑚礁，在那里它们有可能战胜并捕食各种各样的本地珊瑚礁动物。在这里，我们从野外对巴哈马新普罗维登斯（Providence）天然礁石的实地观察中，得出了fish鱼捕食率的第一个估计值。尽管据报道l鱼在其本地范围是缝隙状的，但它们在白天非常活跃。观察到鱼捕捞了至少9个科的至少19种珊瑚鱼。他们在阴天和更深的地方捕猎更多，在清洁站附近的鱼群附近经常捕猎。鱼消耗本地鱼类的平均速率为杀死h〜（-1）的1.44（晴天时为0.29杀死h〜（-1），而在阴天时为2.29杀死h〜（-1））。如果l鱼也在黄昏和黎明之间狩猎，这个估计可能是保守的。该比率大大高于仅通过已知的自由采食来自本地范围的鱼类而得出的对虾的捕食率。我们的结果表明，使用已公布的来自本地范围的捕食率来预测of鱼对加勒比地区本地鱼类的影响可能会严重低估这些影响。

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