Zobrazeno 1 - 10
of 96
pro vyhledávání: '"Isao Hanyu"'
Publikováno v:
Fish physiology and biochemistry. 7(1-6)
Goldfish,Carassius auratus, spawn several times within a spawning season. A gonadotropin (GtH) surge occurs at the time of ovulation in this cyprinid species. This ovulatory GtH surge mediates the processes of final oocyte maturation and ovulation, a
Publikováno v:
Fisheries science. 60:155-158
Publikováno v:
Fisheries science. 60:149-154
Autor:
Akio Shimizu, Isao Hanyu
Publikováno v:
Journal of Experimental Zoology. 265:134-143
The involvement of changes in photoperiodism in gonadal activity was investigated in the spring-spawning bitterling, Acheilognathus tabira, in which photoperiodism develops during the summer and declines during the winter. In spring, gonadal developm
Publikováno v:
Aquaculture. 97:327-334
A cytogenetic study was conducted in the freshwater prawn, Macrobrachium rosenbergii , by preparing metaphase chromosome spreads from the tissue of the antennal gland and testis. Chromosomal analysis of the antennal gland in males revealed a modal di
Autor:
Isao Hanyu, Cheng-Sheng Lee, Katsumi Aida, Frederick W. Goetz, Christopher D. Kelley, Clyde S. Tamaru
Publikováno v:
Aquaculture. 95:149-168
In Hawaiian waters, female mullet were first observed to possess early vitellogenic oocytes in November. Ten weeks later, vitellogenesis had progressed to the point where spawning could be induced (i.e., mean oocyte diameter > 600 μm). The model: Ln
Publikováno v:
NIPPON SUISAN GAKKAISHI. 57:1865-1870
Tobinumeri-dragonet has two spawning seasons, spring and autumn, within a single year in Lake Hamana, but it is not clear whether the same individual spawns during both spawning seasons, or whether there are two different populations of tobinumeri-dr
Publikováno v:
NIPPON SUISAN GAKKAISHI. 57:2193-2201
In order to investigate spawning rhythms of shirogisu, a daily spawner, the spawning time of individual females was monitored every 15 minutes. Females oviposited spontaneously during 1800-2400h almost every day in summer under natural conditions. Th
Publikováno v:
NIPPON SUISAN GAKKAISHI. 57:1871-1876
In order to investigate the factors which initiate the autumn spawning, immature fish were reared under different conditions from August 15 to September 12. Spawning was observed from August 27 in the 12L12D/22-24°C group, and from August 30 in 15L9
Publikováno v:
NIPPON SUISAN GAKKAISHI. 57:209-217
To investigate the combined effects of temperature and photoperiod on molting (reproductive molt, R; common molt, C), reproduction and growth of Macrobrachium rosenbergii, six groups of 14 females each were exposed to 12L12D or 15L9D, at 24, 28 or 32