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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Tropical intertidal seagrass beds: An overlooked foraging habitat for fishes revealed by underwater videos
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Tropical intertidal seagrass beds: An overlooked foraging habitat for fishes revealed by underwater videos

机译：热带潮间带海草床：水下视频揭示了鱼类的觅食栖息地

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摘要

Intertidal seagrass beds occur throughout the tropical Indo-Pacific region and several studies have shown that small fishes inhabit them when inundated during the tidal regime. However, there is a lack of evidence regarding the trophic importance of these habitats to different fish populations at such times. In this study, we examined the feeding behavior of the juvenile fish communities during an incoming tide at two intertidal seagrass bed sites in northern Mindanao, Philippines, during both wet and dry seasons, by deploying remote underwater video cameras. The video footages (3 h) revealed that nearly half of all fish species arrived within 30 min from the start of recording (ca. 30-40 cm water depth, 10-20 cm above the seagrass canopy), and that species richness gradually increased with rising tide, reaching 80% of recorded species within 120 min at both sites in both seasons. Small juvenile (<10 cm total length) labrids, lethrinids, lutjanids, and siganids were most abundant in all video recordings. Large juveniles (> 10 cm total length) of the latter three families were first to invade intertidal seagrass beds with incoming tides, whereas those of Labridae were more abundant in later stages of the tidal cycle. The fishery target families Labridae, Lethrinidae, Siganidae, and Lutjanidae foraged during the rising tide, pointing to the importance of intertidal seagrass beds as a foraging habitat for at least 17 species. Because these habitats are disappearing due to expanding coastal developments for human use, the results highlight the ecological importance as a foraging area for multiple fish species to which it may help support developing conservation and management policies in coastal zones.
机译：潮间带海草床遍布整个热带印度太平洋地区，一些研究表明，在潮汐时期，小鱼栖息在小鱼中。但是，在这些时候，这些生境对不同鱼类种群的营养重要性缺乏证据。在这项研究中，我们通过部署远程水下摄像机，研究了在菲律宾棉兰老岛北部两个潮间带海草床点在潮汐和潮季期间幼鱼群落的进食行为。录像片段（3小时）显示，几乎所有鱼类中的一半在记录开始后的30分钟内到达（大约30-40 cm水深，在海草冠层上方10-20 cm），并且物种丰富度逐渐增加随着涨潮，两个季节的两个地点在120分钟内达到记录物种的80％。在所有视频记录中，小型幼体（总长度小于10厘米）的瓢虫，甲虫，lutjanid和siganids最多。后三个科的大型幼体（总长> 10 cm）首先侵入潮汐，并在潮汐周期的后期充实了Labridae的潮汐。捕捞目标家庭Labridae，Lethrinidae，Siganidae和Lutjanidae在涨潮期间觅食，指出潮间带海草床作为至少17种鱼类觅食生境的重要性。由于这些栖息地由于沿海发展供人类使用而消失，因此该结果突出了作为多种鱼类觅食区的生态重要性，它可能有助于支持发展沿海地区的保护和管理政策。

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  • 来源
    《Journal of Experimental Marine Biology and Ecology》 |2020年第5期|151353.1-151353.10|共10页
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  • 作者单位

    Kochi Univ Grad Sch Integrated Arts & Sci Nanko Ku 200 Monobe Kochi 7838502 Japan;

    Mindanao State Univ Naawan Inst Fisheries Res & Dev Naawan 9023 Misamis Orienta Philippines;

    Rajamangala Univ Technol Srivijaya Fac Sci & Fisheries Technol Dept Marine Sci Sikao 92150 Trang Thailand;

    Shimane Univ Estuary Res Ctr Fisheries Ecosyst Project Ctr 1060 Nishikawatsu Matsue Shimane 1060 Japan;

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  • 正文语种 eng
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  • 关键词

    Fish behavior; Foraging habitat; Intertidal seagrass bed; Philippines; Tidal migration; Underwater video;

    机译：鱼的行为;觅食栖息地;潮间带海草床;菲律宾;潮汐迁徙;水下视频;

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