中禅寺湖におけるサケ科魚類とくにヒメマスの鉛直分布について

岡本 峰雄; 奥本 直人; 岩田 宗彦; 生田 和正; 福所 邦彦

doi:10.2331/suisan.59.1813

岡本峰雄, 奥本直人, 岩田宗彦, 生田和正, 福所邦彦

著者情報

ジャーナルフリー

1993 年 59 巻 11 号 p. 1813-1821

DOI https://doi.org/10.2331/suisan.59.1813

詳細

発行日: 1993/11/25 受付日: 1992/08/10 J-STAGE公開日: 2008/02/29 受理日: - 早期公開日: - 改訂日: -
訂正情報
訂正日: 2008/02/29 訂正理由: - 訂正箇所: 論文抄録訂正内容: Wrong : Acoustic surveys were carried out to examine the diurnal-nocturnal behavior of Salmonidae mainly consisting of Hime salmon Oncorhynchus nerka in Chuzenji Lake located around 139°28′ E, 37°45′ N, with an area of 11.3 km², a maximum water depth of 172m, and an altitude of 1, 271 m.
In summer and autumn, a remarkable level of themocline was shown between depths of 10 and 30m, and the water temperature range was more than 15°C at the top of this and less than 5°C at the bottom. During the night many Salmonidae were dispersed in the surface layer (summer: 10-40m, autumn: 20-30m) of the whole lake area, and in the daytime ascend to a shallower layer (summer: 3-20m, autumn: 10-20m). But during the day, their number was very small compared with the night-time. The reason for this was estimated as horizontal maldistribuion.
In winter, the water temperature was stabilized at 5.2 ?? 5.4°C in all layers, and Salmonidae were dispersed in the bottom layer (100-172m) around the deep area of the lake during the day, and were dispersed in the surface layer (20-60m) of the whole lake area at night.
Right : Acoustic surveys were carried out to examine the diurnal-nocturnal behavior of Salmonidae mainly consisting of Hime salmon Oncorhynchus nerka in Chuzenji Lake located around 139°28' E, 37°45' N, with an area of 11.3 km², a maximum water depth of 172m, and an altitude of 1, 271 m.
In summer and autumn, a remarkable level of themocline was shown between depths of 10 and 30m, and the water temperature range was more than 15°C at the top of this and less than 5°C at the bottom. During the night many Salmonidae were dispersed in the surface layer (summer: 10-40m, autumn: 20-30m) of the whole lake area, and in the daytime ascend to a shallower layer (summer: 3-20m, autumn: 10-20m). But during the day, their number was very small compared with the night-time. The reason for this was estimated as horizontal maldistribuion.
In winter, the water temperature was stabilized at 5.2 ?? 5.4°C in all layers, and Salmonidae were dispersed in the bottom layer (100-172m) around the deep area of the lake during the day, and were dispersed in the surface layer (20-60m) of the whole lake area at night.

訂正日: 2008/02/29 訂正理由: - 訂正箇所: PDFファイル訂正内容: -

抄録

Acoustic surveys were carried out to examine the diurnal-nocturnal behavior of Salmonidae mainly consisting of Hime salmon Oncorhynchus nerka in Chuzenji Lake located around 139°28' E, 37°45' N, with an area of 11.3 km², a maximum water depth of 172m, and an altitude of 1, 271 m.
In summer and autumn, a remarkable level of themocline was shown between depths of 10 and 30m, and the water temperature range was more than 15°C at the top of this and less than 5°C at the bottom. During the night many Salmonidae were dispersed in the surface layer (summer: 10-40m, autumn: 20-30m) of the whole lake area, and in the daytime ascend to a shallower layer (summer: 3-20m, autumn: 10-20m). But during the day, their number was very small compared with the night-time. The reason for this was estimated as horizontal maldistribuion.
In winter, the water temperature was stabilized at 5.2 ?? 5.4°C in all layers, and Salmonidae were dispersed in the bottom layer (100-172m) around the deep area of the lake during the day, and were dispersed in the surface layer (20-60m) of the whole lake area at night.

責任著者(Corresponding author)

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