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海洋生活期初期のサケ・マス幼魚の生態に関する研究 (1)
https://fra.repo.nii.ac.jp/records/2001765
https://fra.repo.nii.ac.jp/records/2001765b7dc25eb-716b-46a8-b9c5-e685d5f31349
| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||||||||||||||||||
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| 公開日 | 2024-04-08 | |||||||||||||||||||||||
| タイトル | ||||||||||||||||||||||||
| タイトル | 海洋生活期初期のサケ・マス幼魚の生態に関する研究 (1) | |||||||||||||||||||||||
| 言語 | ja | |||||||||||||||||||||||
| タイトル | ||||||||||||||||||||||||
| タイトル | Ecological Studies on Juveniles of Chum and Pink Salmon during Early Ocean Residence (1) | |||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||||
| 言語 | ||||||||||||||||||||||||
| 言語 | jpn | |||||||||||||||||||||||
| 資源タイプ | ||||||||||||||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||||||||||||||
| 資源タイプ | departmental bulletin paper | |||||||||||||||||||||||
| アクセス権 | ||||||||||||||||||||||||
| アクセス権 | metadata only access | |||||||||||||||||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||||||||||||||||||||
| その他（別言語等）のタイトル | ||||||||||||||||||||||||
| その他のタイトル | 網走湾海域における幼魚の分布と行動 | |||||||||||||||||||||||
| 言語 | ja | |||||||||||||||||||||||
| その他（別言語等）のタイトル | ||||||||||||||||||||||||
| その他のタイトル | Distribution and Behavior of the Juvenile in Abashiri Bay and the Adjacent Waters | |||||||||||||||||||||||
| 言語 | ja | |||||||||||||||||||||||
| 著者 |
入江, 隆彦
× 入江, 隆彦
× 小林, 時正
× 大迫, 正尚
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| 抄録 | ||||||||||||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||||||||||||
| 内容記述 | There were few studies about juveniles of chum ( Oncorhynchus keta) and pink salmon (O. gorbuscha) in the period while they move from near the shore to off shore. The authors investigated the distribution and behavior of the juveniles in this period. Surveys totaling eleven were carried out from May to July in 1977-1980 in Abashiri Bay and adjacent waters. For collecting the salmonid juveniles, the following methods were used; larva net, Isaacs-Kidd mid-water trawl, gill net, purse seine net and spoon net with fishing lamp. During the day the purse seine net was found to be most effective. However, at night the spoon net with fishing lamp method was the most effective for collecting the juveniles at this stage of their development. A total number of 1,138 chum and 442 pink salmon were collected in these surveys. Body length (this is fork-length) was between 2.9 and 11.6 cm in chum salmon and it was between 3.0 and 9.8 cm in pink salmon. Juveniles of pink salmon were caught together with ones of chum salmon, and the body lengthes of those were a little smaller than those of chum salmon. Juveniles of salmonid were found to be distributed within a two miles distance from the shore in mid and late May. They were often seen in inlets and ports in schools. In the period from late June through early July, most of the juveniles could be observed in near shore waters. However, some juveniles were found at a distance of up to ten miles from the shore. It was slightly observed that the larger juveniles were collected at the furthest distance from the shore. It was observed that juveniles were swimming in circles in school under the fishing lamp in the period from late June through early July. Meanwhile, during the day as a number of juveniles were collected at one time by purse seine net. It was suggested that the juveniles were behaving in schools in the daytime. The surveys were took place in the area of different water masses. It was found that the greater number of juveniles could be seen in the Coastal waters which were affected by fresh water in the coastal regions. However, they were seldom seen in Okhotsk Sea surface waters, which is the off shore cold water mass. In the period when Soya warm current is becoming dominant and covering the surface layer in Abashiri Bay and adjacent waters in early or mid July, the juveniles were scarecely observed in these waters. It was suggested that the juveniles showing greatest development enabling them to move further off shore, had migrated first to the eastern part of the seas along the Shiretoko Peninsla. They reformed schools as they went moving along with the water masses in which they were living. | |||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||||
| 抄録 | ||||||||||||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||||||||||||
| 内容記述 | 著者らは,網走湾から知床半島にかけての海域で,1977年から1980年の5月から7月の期間に,調査船を使ってのべ11回のサケ·マス幼魚の分布調査を実施し,幼魚が沿岸から沖合に移動するまでの時期の,幼魚の分布様式および行動について若干の知見を得た。(1) サケ·マス幼魚の採集方法として,稚魚ネット,アイザックスキッド中層トロール,刺網、まき網および集魚灯を試みたが、まき網と集魚灯以外は良い結果が得られなかった。集魚灯を用いる方法は、この時期の幼魚を採集する方法としては,一つの有効な手段であると判断された。(2) 調査期間中に,合計でシロザケ幼魚1,138尾,カラフトマス幼魚442尾を採集した。これら幼魚の体長(尾叉長)は,シロザケが 2.9~11.6cm,カラフトマスが3.0~9.8cmであった。カラフトマスはシロザケに混って同時に採集され,その体長はシロザケよりもいく分小さい傾向が認められた。(3) サケ·マス幼魚は5月中旬から下旬には、離岸2マイル以内の岸寄りに分布し,中でも港湾や入江で群泳しているのが多く観察された。6月下旬から7月上旬には,大部分の幼魚は離岸10マイル以内に分布し,岸寄りほど分布する幼魚の量は多かった。また,それらの体長は沖合のものほど大きい傾向が,わずかではあるが認められた。(4) 6月下旬から7月上旬には,幼魚が灯下で旋回しながら群泳するのが観察された。また,昼間,まき網によっても一つの群と思われるものが採集されたことから,昼間には群をなして行動している場合があると考えられた。(5) サケ·マス幼魚の分布域の水塊特性についてみると,幼魚は沿岸水の影響を受けた水域に分布しているのが見られ,沖合のオホーツク海表層水中には極めて少なかった。また,沿岸部の表層まで宗谷暖流水が卓越してくる7月上旬から中旬には,その水域内で幼魚はまれにしか観察されなかった。(6) 網走湾海域では,沿岸滞泳期から離岸期に至る時期のサケ·マス幼魚は,沿岸水の名残りのある水域で生活し,成長とともにいく分沖合に生活域を拡大する中で,移動するに十分な発育段階に達した幼魚は,生活域の水塊自体の移動にともなって、群をなしながら知床半島沿いに東方へ移動するものと推察された。 | |||||||||||||||||||||||
| 言語 | ja | |||||||||||||||||||||||
| 書誌情報 |
ja : 北海道区水産研究所研究報告 en : Bulletin of the Hokkaido Regional Fisheries Research Laboratory 巻 46, p. 15-35, ページ数 21, 発行日 1981-08 |
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| 出版者 | ||||||||||||||||||||||||
| 出版者 | 北海道区水産研究所 | |||||||||||||||||||||||
| 言語 | ja | |||||||||||||||||||||||
| 出版者 | ||||||||||||||||||||||||
| 出版者 | Hokkaido Regional Fisheries Research Laboratory | |||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||||
| ISSN | ||||||||||||||||||||||||
| 収録物識別子タイプ | PISSN | |||||||||||||||||||||||
| 収録物識別子 | 0513-2541 | |||||||||||||||||||||||
| 書誌レコードID | ||||||||||||||||||||||||
| 収録物識別子タイプ | NCID | |||||||||||||||||||||||
| 収録物識別子 | AN00124758 | |||||||||||||||||||||||
| 情報源 | ||||||||||||||||||||||||
| 識別子タイプ | Local | |||||||||||||||||||||||
| 関連識別子 | hnf_k_46_2 | |||||||||||||||||||||||
| 関連サイト | ||||||||||||||||||||||||
| 識別子タイプ | URI | |||||||||||||||||||||||
| 関連識別子 | https://agriknowledge.affrc.go.jp/RN/2010234276 | |||||||||||||||||||||||
| 言語 | ja | |||||||||||||||||||||||
| 関連名称 | 日本農学文献記事索引(agriknowledge) | |||||||||||||||||||||||
