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Life History

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Eel Science

Part of the book series: Fisheries Science Series ((FISHSS))

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Abstract

All animals have a “life history”, which defines where they live and how they survive and reproduce. The long life history of anguillid eels begins with spawning areas in the ocean and subsequently leads to various juvenile growth habitats in the coastal sea, estuaries, freshwater rivers, ponds, and lakes. They migrate between different aquatic habitats, marine and freshwater, at least twice during their life-history transitions. The first migration of anguillid eels is a larval migration. The larvae hatch in the ocean where they feed and grow while drifting in ocean currents until they are near their nursery habitats. This is followed by the upstream migration of glass eels and elvers that reach the estuaries, and eventually become young yellow eels that seek out growth habitats in coastal and freshwater areas. The second is spawning migration, in which maturing adults return to their spawning areas in the ocean for reproduction. These dynamic migrations make them typical model species of catadromous fish owing to their separated spawning and growth habitats. To make that possible, anguillid eels have evolved unique life history stages, which include their oceanic larvae, the post-metamorphosis juvenile stage that swims from the ocean near the continental shelf to coastal waters and estuaries, the early upstream migration and growth stages, and finally, the maturing reproduction stage. The morphological, ecological, and physiological characteristics of eels vary according to their life history stages, making them a unique creature that might be difficult to identify as a single species. This chapter provides an overview of the unique life history of anguillid eels and their various life history stages.

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Correspondence to Mari Kuroki .

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© 2023 The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

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Kuroki, M. (2023). Life History. In: Tsukamoto, K., Kuroki, M., Watanabe, S. (eds) Eel Science. Fisheries Science Series. Springer, Singapore. https://doi.org/10.1007/978-981-99-5692-0_3

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