Background River estuaries provide various ecosystem services, such as nutrient circulation, climate change mitigation, habitats and coastal defence. Information on the various taxonomic groups is collected from large-scale estuaries; however, few studies have focused on river estuaries of small and medium-sized rivers. In particular, information on river estuaries in peninsulas and islands with complex marine environments is lacking. New information This paper provides basic information on summer fish fauna in the southern part of the Boso Peninsula, Japan. The Boso Peninsula is located at the northernmost point of where the warm current (Kuroshio) reaches and is considered to have highly endemic fish fauna. In total, 28 families, 51 species and 2,908 individuals were collected from the 27 river estuaries. The data are all accessible from the document “database_fish_estuary_boso (http://ipt.pensoft.net/manage/resource.do?r=database_fish_estuary_boso)”. Further, Sicyopterus japonicus and Microphis brachyurus, which appear in estuaries that are influenced by the Kuroshio, were confirmed. However, these species were confirmed in few of the rivers studied, highlighting the importance of habitat conservation.

中文翻译：

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日本房总半岛南部河口夏季鱼类动物群样本数据库

背景 河口提供各种生态系统服务，例如养分循环、减缓气候变化、栖息地和海岸防御。从大型河口收集各种分类群的信息；然而，很少有研究关注中小河流的河口。尤其是海洋环境复杂的半岛和岛屿的河口信息缺乏。新信息 本文提供了日本房总半岛南部夏季鱼类动物群的基本信息。房总半岛位于暖流（黑潮）到达的最北端，被认为拥有高度特有的鱼类动物群。从27个河口共采集到28科51种2908只个体。这些数据都可以从文档“database_fish_estuary_boso (http://ipt.pensoft.net/manage/resource.do?r=database_fish_estuary_boso)”中访问。此外，在受黑潮影响的河口出现的 Sicyopterus japonicus 和 Microphis brachyurus 也得到了证实。然而，这些物种在所研究的少数河流中得到证实，突出了栖息地保护的重要性。