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M Daigo

Publications and source records attributed to M Daigo.

29 records · Page 2Linked to original sources
PubMed1989

Developmental changes of the fore- and hind-limbs in the fetuses of the southern minke whale, Balaenoptera acutorostrata.

15 fetuses of southern minke whale, Balaenoptera acutorostrata (from 8.2 mm C.R.L. to 38.9 mm C.R.L.), obtained from the Kyodo whale company in Japan (in whaling seasons from 1982 to 1986), were used for the present study. The fore-limb first appears in the 11.4 mm fetus, and the hind-limb in the 15.3 mm fetus. The fore-limb develops progressively during gestation, while the hind-limb disappears by the 38.9 mm fetus. The critical period of limb development in southern minke whale was shown to be at a stage between that in the small sized species; Common Porpoise, Phocoena communis and Striped Dolphin, Prodelphinus caeruleoalbus, and in large one; Humpback Whale, Megaptera nodusa.

Animals↗
PubMed1989

Morphogenesis of the digestive tract in the fetuses of the southern minke whale, Balaenoptera acutorostrata.

Gross and histological observations on the digestive tract in 15 fetuses of the southern minke whale (Balaenoptera acutorostrata) with C.R.L. from 37.2 to 1,940mm revealed that the fetal stomach formation in this species resembled that of the ruminant, i.e., the compartment 1 arose from the stomach bud, but not from the esophagus to form the forestomach. The differentiated gastric glands, the parietal cells, were detected in fetuses with more than 213.0mm C.R.L. The circular folds resembling intestinal haustra like circular folds without tenia were detected on the cecum in fetuses with more than 650mm C.R.L. and less than 1,070mm C.R.L. The similar structure was seen in large intestine in fetuses with more than 650mm C.R.L.

Animals↗
PubMed1989

Craniometrical estimation of the native Japanese Mishima cattle, using multivariate analysis.

The present study on measurement of the skull of Mishima cattle, which has been postulated as the only pure representative breed of native Japanese cattle, was performed using craniometrical multivariate analysis. The data of the skull of Mishima cattle was compared with 17 breeds of cattle, i.e. Korean cattle (Hamhung, Pyongyang, Chinju Suwon, and Kwangju), Mongolian cattle, Hainan Tao cattle, northeastern Chinese cattle (Shuangliao, Shenyang, Tongliao, Lüta, and Chilin), Astatic Water Buffalo, Yak, Bos Banteng, American Bison, and Holstein-Friesian. The Mishima cattle was included in the group of Korean breeds, especially it was closed on the group of Pyongyang and Chinju breeds. The distance on the craniometrical multivariate analyzing co-ordinate between Mishima cattle and Hainan Tao breed of Zebu cattle was larger than the distance between Mishima cattle and Korean breeds. While result, as a above the present study was very important for the origin of "Wagyu" (native Japanese cattle). Since the northern route theory of the origin of Mishima cattle has been reported on the type of serum enzymes and hemotypes. It was suggested that the craniometrical multivariate analysis supported to the northern route theory of the origin of Mishima cattle.

Animals↗
PubMed1987

Prenatal development of subepithelial vasculature related to appearance of ruminal papillae in the bovine rumen.

The mucosal surface of the fetal bovine rumen was studied with ruminal papillae standing at an interval of 400 microns on an average with a slight increase in distance from each other during gestation. Nevertheless, the overall area of the inner surface of the rumen was greatly increased with fetal age, suggesting a successive development of new ruminal papillae appearing at the sites among older ones. In the 3rd month of gestation, the subepithelial microvasculature consisted into 2 layers (adluminal and submucosal) of capillary networks with anastomoses between them. Junctional sites of the adluminal capillary and the anastomosing ramus were gradually elevated by extension of the ramus to form hairpin-like, and later papilla-like, capillary projections in the lamina propria. These projections further pushed the surface epithelium up and formed the cores of the ruminal papillae. The number of capillary projections, regardless of their sizes, in the lamina propria always exceeded that of ruminal papillae at any time of gestational period. Therefore, it seems that the successive formation of new ruminal papillae is preceded by the formation of subepithelial capillary projections in the lamina propria.

Animals↗