The internal sexual organs and reproduction of Chimaera phantasma caught in the coastal waters of Nagasaki were investigated. The testes of C. phantasma is that of seminiferous follicle type. The seminiferous follicles develop more in the region near the outer pole of the testis. Both ovaries are functional and each gonopores open separately without the cloaca. Some ova were covered in the capsule one by one at the nidamental gland, as in most Elasmobranchii, and the ova were spawned in succession in the same breeding season. Sexual maturity in females was apparently reached at a body length of about 63cm, while in males it was attained at about 51cm. The reproductive season of C. phantasma appears to last about a half year, with the peak a...
[Author abstract]In order to keep a stable supply of the seedlings of the Japanese parrot fish, Ople...
The pomacentrid fish, Chromis notata (Temminck et Schlegel) is found around shallow rocky reefs in s...
Spawning of the prawn usually takes place after 12 o'clock midnight. At the same time, the pressure ...
We conducted anatomical and histological observations of the gonads in the self-fertilizing mangrove...
Comparing with the fine structure of spermatogenic cell of selachians and oter vertebrates, that of ...
Gonads of Halocynthia purple aurantium Pallas, caught in May, June and October 2010–2011 from Sokolo...
Ovaries of Dryocosmus kuriphilus Yasumatsu, an important pest of chestnut trees in Japan, were exami...
The reproductive biology of female spotted halibut, Verasper variegutus, was examined from 19 specim...
In Sasebo Bay, we caught many specimens of "kasago" Sebastiscus marmoratus CUVIER et VALENCIENES for...
In this paper are reported the egg development and hatched larvae of Monacanthus cirrhifer Temminck ...
Two species of blenniid fish, Cirrisalarias bunares and Ecsenius oculus, were collected from Yaku-sh...
Pternis lunulata Temminck et Schlegel is a well known Scorpaenoid fish by its beautiful coloration a...
The present report is to investigate the morphology and ecology of reproductive system of female Hep...
The change of egg volume from oviposition to first cleavage in Japanese freshwater pulmonate, Radix ...
The diatom Chaetoceros affinis was found to possess a simple life cycle. The duration of vegetative ...
[Author abstract]In order to keep a stable supply of the seedlings of the Japanese parrot fish, Ople...
The pomacentrid fish, Chromis notata (Temminck et Schlegel) is found around shallow rocky reefs in s...
Spawning of the prawn usually takes place after 12 o'clock midnight. At the same time, the pressure ...
We conducted anatomical and histological observations of the gonads in the self-fertilizing mangrove...
Comparing with the fine structure of spermatogenic cell of selachians and oter vertebrates, that of ...
Gonads of Halocynthia purple aurantium Pallas, caught in May, June and October 2010–2011 from Sokolo...
Ovaries of Dryocosmus kuriphilus Yasumatsu, an important pest of chestnut trees in Japan, were exami...
The reproductive biology of female spotted halibut, Verasper variegutus, was examined from 19 specim...
In Sasebo Bay, we caught many specimens of "kasago" Sebastiscus marmoratus CUVIER et VALENCIENES for...
In this paper are reported the egg development and hatched larvae of Monacanthus cirrhifer Temminck ...
Two species of blenniid fish, Cirrisalarias bunares and Ecsenius oculus, were collected from Yaku-sh...
Pternis lunulata Temminck et Schlegel is a well known Scorpaenoid fish by its beautiful coloration a...
The present report is to investigate the morphology and ecology of reproductive system of female Hep...
The change of egg volume from oviposition to first cleavage in Japanese freshwater pulmonate, Radix ...
The diatom Chaetoceros affinis was found to possess a simple life cycle. The duration of vegetative ...
[Author abstract]In order to keep a stable supply of the seedlings of the Japanese parrot fish, Ople...
The pomacentrid fish, Chromis notata (Temminck et Schlegel) is found around shallow rocky reefs in s...
Spawning of the prawn usually takes place after 12 o'clock midnight. At the same time, the pressure ...