Titlebook: Eel Science; Katsumi Tsukamoto,Mari Kuroki,Soichi Watanabe Book 2023 The Japanese Society of Fisheries Science 2023 Anguillid Eel.Spawning

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Generalize

Spawning Areasdt discovered the large overlapping Sargasso Sea spawning areas of the Atlantic eels of the genus ., it became a famous revelation about fish migration. This was followed by Katsumi Tsukamoto’s discovery of the Japanese eel spawning area in the North Equatorial Current (NEC) of the western North Pac

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Larval Transportincreases dramatically. In contrast, eels spend from 6?months to 2?years as leptocephalus larvae. During this period, they are transported long distances by ocean currents to join the distribution areas of their respective species. However, if they are not transported to the proper location, their s

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Glass Eel Recruitmentwn as the Kuroshio Current (KC), to an offshore region of East Asia. After metamorphosing from leptocephali to glass eels, they leave the KC and migrate into their growth habitats with brackish and fresh water. The inshore migration behavior of glass eels in the open ocean remains unknown. However,

Hypomania

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Behaviorin rivers, lakes, and estuaries, where they spend a large part of their life. The emerging biotelemetry of free-ranging fish represents a promising approach for better observation of the cryptic sedentary behavior of eels over an extensive period (Béguer-Pon et al. 2018). This chapter describes the

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Reproductionons. In most cases, they proceed and successfully complete vitellogenesis and spermatogenesis. However, oocyte maturation and ovulation, and sperm maturation is not spontaneously triggered under aquaculture conditions, which is different from their natural spawning places. The difficulty of eel repr

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Metamorphosis and Silveringife in the ocean to sedentary life in inland water, and silvering, which occurs when they begin their spawning migration to the oceanic spawning area. Both metamorphosis and silvering occur synchronously with lifestyle and habitat changes, and are periods of great importance in the ecology of eels.

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