There is a possibility that individuals lay eggs quickly with a large particle is born.

When implanted in the embryo of the goldfish germ cells removed fertilized eggs of sturgeon , known luxury delicacy in the " caviar " from ( high) , Hokkaido that you get to the gonads germ cells develop into testes or ovaries in the body of a goldfish hatched research team , such as is found out before the 26th .
The functions of the cell from which the sperm and eggs results indicating that there is a commonality across species . Species lay eggs of large grain , which is especially prized as caviar and natural species take more than 10 years before incubation . Growth is fast , the germ cells of natural species , but there is a possibility that if transplanted into eggs of farmed species that does not lay eggs only small , individual lay eggs quickly with a large particle is born .
Mountain feather Prof. of Hokkaido transplanted embryos goldfish dyed with a special dye one germ cell 1 of sturgeon . I followed the process goldfish until the hatching .
Goldfish does not lay eggs of sturgeon germ cells of sturgeon can be included in the ovary , mountain feather professor pointed out " the possibility that lay eggs of different species if sturgeon between closely related species ," he said . If you can be made to give birth to large amounts of natural egg species in aquaculture species , and that it may Fuyaseru the population of endangered species and production of caviar .
Team of mountain feather professor was also confirmed that in the study , cell division is not travel at the part of the egg as fish normal sturgeon , division advance throughout the egg as amphibians such as frogs . I want to look forward to in the future , production of caviar is increased by this .


高級珍味「キャビア」で知られるチョウザメの受精卵（胚）から取り出した生殖細胞を金魚の胚に移植すると、ふ化した金魚の体内で生殖細胞が卵巣や精巣に発達する生殖腺にたどり着くことを北海道大などの研究チームが26日までに突き止めた。
　卵や精子のもとになる細胞の機能には、種を超えた共通性があることを示す成果。天然種などキャビアとして特に珍重される大粒の卵を産む種は抱卵までに10年以上かかる。天然種の生殖細胞を、成長は早いが小粒の卵しか産まない養殖種の卵に移植すれば、大粒の卵を早く産む個体が誕生する可能性がある。
　北海道大の山羽教授らはチョウザメの生殖細胞１つを特殊な染料で染めて金魚の胚に移植。金魚がふ化するまでの過程を追った。
　チョウザメの生殖細胞が卵巣に含まれても金魚はチョウザメの卵を産まないが、山羽教授は「近縁種のチョウザメ同士なら異なる種の卵を産む可能性がある」と指摘。養殖種に天然種の卵を大量に産ませることができれば、キャビアの生産量や絶滅危惧種の個体数を増やせるかもしれないという。
　山羽教授のチームは調査の中で、チョウザメが通常の魚類のように卵の一部で細胞分裂が進むのではなく、カエルなどの両生類のように卵の全体で分裂が進むことも確認した。これによって将来、キャビアの生産量が増えることを期待したいですね。