2024-03-29T15:41:08Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00011913
2023-01-16T04:59:00Z
1179:1180:1186:1254
Oil droplet movement during ooplasmic segregation in the Oryzias latipes (medaka) fish egg
Catalone, Bradley J.
Fluck, Richard A.
open access
Laboratory of Freshwater Fish Stocks Bioscience Center Nagoya University
本文データは学協会の許諾に基づきCiNiiから複製したものである
During ooplasmic segregation in the medaka egg, one easily identifiable class of ooplasmic inclusions (oil droplets) segregate to the vegetal pole. In this study, we used time-lapse video microscopy to monitor closely the movements of these droplets in eggs oriented with either their animal pole or their vegetal pole uppermost with respect to gravity. After fertilization, the droplets moved first toward the animal pole and then toward the vegetal pole. In eggs oriented with their vegetal pole uppermost, oil droplets stopped moving toward the animal pole significantly sooner than droplets in eggs oriented with their animal pole uppermost. Moreover, the position of an oil droplet on a meridian connecting the animal pole and vegetal pole of the egg was a factor in determining when that droplet ceased moving toward the animal pole, with droplets nearer the animal pole stopping before droplets farther away from this pole. These results, together with others from our laboratory, suggest that at least three forces act upon oil droplets during ooplasmic segregation in the medaka egg: i) a buoyant force that causes droplets to float toward the top of the egg, ii) a force that restrains oil droplets from floating toward the top of the egg, and iii) a force that actively moves droplets toward the vegetal pole.
Laboratory of Freshwater Fish Stocks Bioscience Center Nagoya University
1994
eng
departmental bulletin paper
VoR
https://doi.org/10.18999/fisbjm.6.1
http://hdl.handle.net/2237/13787
https://nagoya.repo.nii.ac.jp/records/11913
10.18999/fisbjm.6.1
http://ci.nii.ac.jp/naid/110007349011/
The Fish Biology Journal Medaka
6
1
5
https://nagoya.repo.nii.ac.jp/record/11913/files/KJ00005673861.pdf
application/pdf
335.3 kB
2018-02-20