Abstract
The current situation for Japanese freshwater fishes is discussed in terms of biodiversity by comparing the Red List and the Red Data Book (Japanese versions). As a threat to Japanese freshwater fishes, rice paddy field remodeling to improve the efficiency of rice cultivation is thought to have the greatest negative impact. This can be shown by the fact that 24 out of 75 species (32%) categorized as “Critically Endangered” and “Extinct,” live around paddy fields. Furthermore, Largemouth Bass Micropterus salmoides and Bluegill Sunfish Lepomis macrochirus introduced from the United States of America are having serious negative effects on small native cyprinids. Steps to protect Japanese freshwater fishes are proposed by referring to “in situ conservation,” “ex situ preservation,” and “social enlightenment.”
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Acknowledgments
I am grateful to both editors Dr. K. Matsuura and Dr. Y. Kai, and Dr. S. Kawai for their patient reviewing of an early draft with valuable comments. I greatly appreciate Dr. K. Watanabe and Dr. T. Morimune for making some of figures, Dr. T. Nakabo for providing the photo of Oncorhynchus kawamurae and Dr. K. Takaku for the latest information on the revision of the Japanese RL and RDB.
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Hosoya, K. (2022). Conservation of Freshwater Fish Diversity in Japan. In: Kai, Y., Motomura, H., Matsuura, K. (eds) Fish Diversity of Japan. Springer, Singapore. https://doi.org/10.1007/978-981-16-7427-3_23
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DOI: https://doi.org/10.1007/978-981-16-7427-3_23
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