Diurnal rhythm of oocyte development and plasma steroid hormone levels in the female red sea bream, Pagrus major, during the spawning season
Reproductive cycle, fecundity, and seasonal distribution of the anglerfish Lophius litulon in the East China and Yellow seas
Maturation and oviposition in the Japanese mitten crab Eriocheir japonicus (De Haan) in relation to their downstream migration
The Japanese mitten crab Eriocheir japonicus is dis tributed in rivers and the shallow sea areas of Japan, Sak halin, east Korea and Formosa.2) This brachyuran is un usual as it is catadromous,…
Observations on ovarian follicle ultrastructure in the marine teleost, Pagrus major, during vitellogenesis and oocyte maturation
Egg size, Duration of Incubation, and Larval Development of the Japanese Mantis Shrimp in the Laboratory*1
The egg size, the duration of incubation, and the larval development of the Japanese mantis shrimp are described and the relationship between theduration of egg incubation and water temperature was studied for the first time in Stomatopoda.
Ovarian structure and batch fecundity in Lophiomus setigerus
The results suggested an extended spawning season during which females undergo repeated spawnings of anglerfish Lophiomus setigerus, and when the most advanced oocytes attained the secondary yolk stage, they formed a batch that separated from the adjacent group of smaller oocytes.
Reproductive Ecology of the Japanese Mitten Crab Eriocheir japonicus (DE HAAN) in Its Marine Phase
KOBAYASHI, SATOSHI and SHUHEI MATSUURA (Department of Fisheries, Faculty of Agriculture, Kyushu University). 1995. Reproductive Ecology of the Japanese Mitten Crab Eriocheir japonicus (DE HAAN) in…
Lunar spawning in Siganus canaliculatus
The gonadosomatic index (I G ) and serum vitellogenin (VTG) levels fluctuated according to the lunar cycle; I G and VTG levels showed peaks at around the new moon and the waning moon, respectively, suggesting that spawning of this species is synchronized with the lunar cycles.
Testicular development and serum levels of gonadal steroids during the annual reproductive cycle of captive Japanese sardine
- M. Matsuyama, S. Adachi, Y. Nagahama, C. Kitajima, S. Matsuura
- Environmental Science, Biology
- 28 February 1991
The pattern of seasonal changes in the gonadosomatic index (GSI) was inversely correlated with that of water temperature, and reflected the degree of testicular maturity in the Japanese sardine, and steroidal regulation of spermatogenesis and spermiation in other teleosts.
Laboratory Studies on Molting and Growth of the Shore Crab, Hemigrapsus sanguineus de Haan, Parasitized by a Rhizocephalan Barnacle.
The annual growth of parasitized males and females was about half that of unparasitized crabs, and the life-span of the externa and the molting of the host would seem to be closely connected.