Growth and maturity size of the three-spined stickleback Gasterosteus aculeatus in rearing pool

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The growth of three-spined stickleback, Gasterosteus aculeatus, was examined in the pool laboratory experiment under natural conditions as possible from March 1981 to December 1983. On an average, the three-spined stickleback grew about 50mm SL/yr and thereafter the growth slowed.The fish reached adult size 45mm by the initial winter.The adults almost died after spawning and only one fish had a maximum life span of a year and ten months and a maximum size of 64.8mm SL. The growth in length was very similar between 1981 and 1982 year class. The most rapid growth in length occurred during May to July. The fish matured at 10-12 months,and probably lived no more than 2 years. Most of the fish lived 1-1.5 years and did not live through the second winter. The fish presumably died shortly after completing their spawning activities,possibly as a result of physiological exhaustion. A small number of emaciated individuals was taken after the second summer. Of three equations,Bertalanffy,Gompertz and Logistic growth curves,the Gompertz equati.on generally gave the most satisfactory result. The growth rate of Japanese population was comparable to that of the fish in South England, Northwest England, mid Wales and Alaska, and the anadromous populations in the Netherland and Japan. Leiurus stickleback in Japan was nearly larger in growth rate than any three-spined stickleback population in other countries.
三重大学水産学部の論文
1987-09-30