1. アユの人工種苗生産の過程で異常斃死した群の病稚魚を病理組織学的に検討した。 2. その結果鰾内への餌の誤嚥と誤嚥によってひき起こされたと思われる細菌･真菌の鰾感染が認められた。
In the process of artificial production of Ayu fry (Plecoglossus altivelis), considerable mortalities of the fry (aged one to two months) were frequently found. Each of these dead fish had a white girdle along the spinal cord, apparently showing the characteristic of the disease. Fourty one of the diseased fish were histopathologically investigated by the present authors. All the diseased flsh erroneously swallowed the diets through the pneumatic duct into the swim bladder, wlthout transferring into the alimentary canal. In 39 flsh, the lumen of the swim bladder showed hyperplasia or necrosis due to bacteria, which probably multiplied abruptly in the organ. In 2 flsh, a great number of fungi were observed in the diet found in the swim bladder ; some organs (kidney and body musculatur) near the swim bladder were remarkably affected by the fungi. From the present work, it is considered that the erroneous-swall‐owing of diet causes the mortalities of Ayu fry.
雑誌名
魚病研究
巻
12
号
2
ページ
135 - 139
発行年
1977-09-01
ISSN
0388-788X
書誌レコードID
AN00063165
フォーマット
application/pdf
著者版フラグ
publisher
日本十進分類法
663
その他のタイトル
Studies on Disease Owing to Erroneous‐Swallowing in Ayu Fry
アユ稚魚の誤嚥に基づく疾病について
AN000631650120202.pdf
(1.68MB)
