仙台湾産クサウオの生活史の選択とその適応的意義〔英文〕

概要

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Growth rate of snailfish is very high, eggs produced in late December-Janmary becoming 400mm in body length for male and 320mm for female in the same period of the next year, and their life span is one year. Food habits shift from “number selection” depending manily on crustaceans to “size selection” relying in particular on sandeel in October when growth is the fastest. Spawning seems to be carried out in several batches of eggs 1.4-1.5mm across and the fertility is estimated to be a hundred thousand and tens of thousands. Snailfish supposedly raises the probability for eggs to survive through caring for them by their fathers. Short life of snailfish along with parental care for eggs brings about a rise of the intrinsic rate of natural increase rm, resulting in an elaborate regulation of population numbers.
日本水産學會の論文