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The effect of salinity on behavioural interactions between native Schoolmaster snapper (Lutjanus apodus) and invasive lionfish (Pterois spp)
Journal of Experimental Marine Biology and Ecology ( IF 2 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.jembe.2020.151414
Rebekah H. Trehern , Cameron Raguse , William F. Bigelow , Aneri Garg , Hannah Hauptman , Annabelle Brooks , Travis E. Van Leeuwen , Lucy A. Hawkes

Abstract Species invasions are a widely-recognized threat to regional and global biodiversity. Lionfish (Pterois spp.), are an invasive marine fish that have been shown to reduce the recruitment and biomass of native reef fish throughout the Caribbean. Recently, it has become clear that lionfish are able to colonise a wide range of ecosystems (mesophotic reefs to brackish estuaries to mangroves) and tolerate a wider range of salinities than previously thought. Estuarine ecosystems often experience hyposaline conditions and act as critical foraging habitats for many ecologically and economically important species. Using a habitat competition experiment at two salinity treatments (10 practical salinity units (psu) and 37 psu control) we investigated the potential effects of lionfish on native Schoolmaster snapper (Lutjanus apodus; a tropical fish species found in high abundance in estuarine ecosystems). Schoolmaster snapper showed a 62% and 47% reduction in cover use when in the presence of lionfish in the 10 psu and 37 psu treatments, respectively. Further, five of the seven behaviours investigated during the interaction period, where both lionfish and snapper had access to the shelter, showed a significant reduction at low salinity, suggesting physiological or behavioural impairment of lionfish at low salinity. Because estuarine habitats are disproportionately important habitats for juvenile fishes, even physiologically or behaviourally compromised lionfish are likely to have some impact.

中文翻译:

盐度对本地学长鲷 (Lutjanus apodus) 和入侵狮子鱼 (Pterois spp) 之间行为相互作用的影响

摘要 物种入侵是公认的对区域和全球生物多样性的威胁。狮子鱼 (Pterois spp.) 是一种侵入性海洋鱼类,已被证明会减少整个加勒比海地区原生珊瑚礁鱼类的补充和生物量。最近,很明显,狮子鱼能够在广泛的生态系统(中光珊瑚礁、微咸河口到红树林)中定居,并能承受比以前想象的更广泛的盐度。河口生态系统经常经历低盐度条件,并成为许多具有重要生态和经济意义的物种的重要觅食栖息地。通过在两种盐度处理(10 个实际盐度单位 (psu) 和 37 psu 控制)下的栖息地竞争实验,我们研究了狮子鱼对本地学长鲷 (Lutjanus apodus) 的潜在影响;一种在河口生态系统中大量发现的热带鱼类)。在狮子鱼的存在下,在 10 psu 和 37 psu 处理中,学长鲷鱼的覆盖物使用量分别减少了 62% 和 47%。此外,在交互期间调查的七种行为中的五种,狮子鱼和鲷鱼都可以进入庇护所,在低盐度下显着减少,表明狮子鱼在低盐度下的生理或行为受损。因为河口栖息地对于幼鱼来说是极其重要的栖息地,即使是生理或行为受损的狮子鱼也可能会产生一些影响。在狮子鱼的存在下,在 10 psu 和 37 psu 处理中,学长鲷鱼的覆盖物使用量分别减少了 62% 和 47%。此外,在交互期间调查的七种行为中的五种,狮子鱼和鲷鱼都可以进入庇护所,在低盐度下显着减少,表明狮子鱼在低盐度下的生理或行为受损。因为河口栖息地对于幼鱼来说是极其重要的栖息地,即使是生理或行为受损的狮子鱼也可能会产生一些影响。在狮子鱼的存在下,在 10 psu 和 37 psu 处理中,学长鲷鱼的覆盖物使用量分别减少了 62% 和 47%。此外,在交互期间调查的七种行为中的五种,狮子鱼和鲷鱼都可以进入庇护所,在低盐度下显着减少,表明狮子鱼在低盐度下的生理或行为受损。因为河口栖息地对于幼鱼来说是极其重要的栖息地,即使是生理或行为受损的狮子鱼也可能会产生一些影响。表明狮子鱼在低盐度下的生理或行为受损。因为河口栖息地对于幼鱼来说是极其重要的栖息地,即使是生理或行为受损的狮子鱼也可能会产生一些影响。表明狮子鱼在低盐度下的生理或行为受损。因为河口栖息地对于幼鱼来说是极其重要的栖息地,即使是生理或行为受损的狮子鱼也可能会产生一些影响。
更新日期:2020-09-01
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