自然河川産および人工醇化ウグイ稚魚における脊椎骨異常の発現
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- 駒田 格知
- 岐阜歯科大学解剖学教室
書誌事項
- タイトル別名
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- Vertebral Anomalies in the Cyprinid Fish, <I>Tribolodon hakonensis</I>
抄録
Vertebral number and the incidence of vertebral anomalies in newly hatched Tribolodon hakonensis collected from the Nagara River and incubated at various water temperatures (15°-25°C) were examined.The vertebral number of the fish incubated at 22°Cwas lower than that at high (25°C) and low temperatures (15°C, 18°C).The frequencies of vertebral anomalies in 11 N 18mm SL fish incubated at 18°Cand at 25°Cwere significantly higher than those at 22°C.The frequencies in natural populations were basically similar to those at 17°-22°C.<BR>The commonest type of vertebral anomalies in hatchery-reared fish was a helical suture of the centra.The incidence of helical sutures of vertebrae located in the middle part of vertebral column was higher than in the other regions, in 11-18mm SL fish reared for two months after hatching.The frequencies of fused vertebrae and the incidence of fused vertebrae throughout the vertebral column in 18-30mm SL fish reared for 3 and 4 months after hatching were similar to those with helical sutures in 11-18mm SL hatchery-reared fish.The centra showing helical sutures in 11-18mm SL fish were fused together during the next period, 18-30mm SL.There-fore, helical sutures are one cause for fused vertebrae in T.hakonensis.
収録刊行物
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- 魚類学雑誌
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魚類学雑誌 29 (2), 185-192, 1982
The Ichthyological Society of Japan
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詳細情報 詳細情報について
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- CRID
- 1390282679744197120
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- NII論文ID
- 130003826088
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- ISSN
- 18847374
- 00215090
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- データソース種別
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- JaLC
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可