@article{oai:kindai.repo.nii.ac.jp:00005228,
 author = {原田,  輝雄 and 水野,  兼八郎 and 村田,  修 and 宮下,  盛 and 古谷,  秀樹},
 issue = {4},
 journal = {近畿大学農学部紀要, Memoirs of the Faculty of Agriculture of Kinki University},
 month = {Jan},
 note = {[Author abstract]Hitherto, no successful study has been reported on the artificial fertilization and rearing of larvae in yellowfin tuna. The authors made some trials of artificial fertilization of yellowfin tuna aboard some professional fishing vessels during the spawning season of this fish (July～August) in cooperation with members of the Far Seas Fisheries Research Laboratory and Owase Fisheries Experimental Station of Mie Prefecture. It was found possible to obtain ripe eggs from yellowfin tuna caught in the waters of Kumanonada, fertilize them and to rear hatched larvae to some extent. Two mature yellowfin tunas were caught on July 26, 1970 by a purse sein vessel in the waters of Kumanonada, some 27 nautical miles south-south-west of Mikisaki, Mie Prefecture. The water temperature at the place was 26.2℃ and the specific gravity of the sea water was 25.1=σ_<15>. About 1.2 million ripe eggs were obtained from the yellowfin tuna and fertilized by, dry method. The fertilized eggs were carried to Owase, and then a part of the eggs were transported by car and train from Owase to the Shirahama Fisheries Laboratory of Kinki University, Wakayama Prefecture; the water temperature was kept between 24.5 and 26.0℃ in transportation. The fertilized eggs are buoyant, spherical in shape, measuring 0.94 to 1.01mm in diameter, and with an oil globule. The eggs were kept in cylindrical tanks of 0.03 to 35 ton. The eggs in Shirahama as well as as in Owase hatched out in 24 to 35 hours at the water temperature ranging from 24.5 to 29.0℃. The newly hatched larvae measured 2.7 mm in total length. The larvae hatched at Owase were transported by train to the Shirahama Fisheries Laboratory, the water temperature was kept between 25.4 and 26.0℃ in transportation. It took 4～6 hours to transport the eggs or hatched larvae from Owase to Shirahama, but this was done without any harmful effect on eggs and larvae. The hatched larvae were fed two days after hatching with a kind of rotifer previously cultivated. It was observed that the larvae, 3.6mm in total length, began to feed on young small rotifers as well as on oyster larvae. The larvae grew up to 5.0 mm in total length in 7 days after hatching. The second food, several kinds of marine copepods, took the place of rotifer 8 days after hatching. Thus, the growing larvae were measured 6.3mm in total length 10 days after hatching and 8.5mm in total length 18 days after hatching, but they survived for only 20 days at the maximum. Stages up to 8. 5 mm in total length are figured in plates 1 and 2.[摘要]1. 7～8月に熊野灘に来遊するキハダから採卵、人工受精し、受精卵を輸送し、ふ化並にふ化仔魚を飼育する試験を行なった。2. 7月26日熊野灘でまき綱で漁獲されたキハダ2尾から約120万個採卵し、人工受精することができた｡3. 受精卵は熊野灘から和歌山県白浜の近畿大学実験場まで輸送し、ふ化仔魚は尾鷲から白浜まで輸送したが、大きな支障なく到着した。4. 卵は直径約1.0mm、水温24.5～29.0℃で24～35時間でふ化した｡5. ふ化仔魚はシオミズツボワムシ、イワガキ幼生、海産コペポーダを摂収し、長いものはふ化後20日間生存し、成長がみられた｡6. 飼育中の減耗はふ化時、ふ化後1週間およびふ化後13～17日に著しかった｡7. 飼育した場合のふ化仔魚の成長は、ふ化直後全長2.7mm、3日3.7mm、10日6.3mm、18日8.5mmであった｡, application/pdf},
 pages = {145--151},
 title = {キハダの人工ふ化と仔魚飼育について},
 year = {1971},
 yomi = {ハラダ, テルオ and ミズノ, カネハチロウ and ムラタ, オサム and ミヤシタ, シゲル and フルタニ, ヒデキ}
}