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サンマの生活史初期における生態
https://fra.repo.nii.ac.jp/records/2007246
https://fra.repo.nii.ac.jp/records/200724613c52621-4ec7-4e82-adaa-6e119342efc2
| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2024-06-10 | |||||
| タイトル | ||||||
| タイトル | サンマの生活史初期における生態 | |||||
| 言語 | ja | |||||
| 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 | ||||||
| 言語 | ja | |||||
| 著者 |
小達, 繁
× 小達, 繁× 林, 小八 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | During January, March and November 1975, the surface waters of the spawning area of the saury were netted so that an ecological analysis could be made of the ichthyoneuston (surface layer fish). Collections were made with fish larvae nets (Maruchi-ami), and specially designed neuston nets (figured); these nets were towed on both sides of research vessels at the same time for five minutes. Data from earlier samples collected with larvae nets from January to May in 1971 and 1975, have also been included in the present analysis. They provided data on diurnal flucutations in the appearance of saury. Several important findings have resulted. As regards distribution, larval and juvenile saury are abundant in the temperate sea areas of the north Pacific Ocean. They are one of the dominant species in our collections; both in the numbers of individuals per haul and in the number of times they occur in a series of hauls. Most larvae (<25 mm body length) and juveniles (25-60 mm body length) were caught by neuston net in the 0-20 cm layer; only a few specimens were caught in the 20-65 cm layer. Also, these larvae occured most abundantly at the very surface of the 0-20 cm layer; both during night and day. Catches of juveniles increased in number during night time and catches of young (>60 mm body length) took place only at night. Evidently these three developmental stages have different diurnal vertical migration patterns. Larvae of Macrorhamphosus scolopax (LINNÉ) and myctophid fishes are also major species in the surface layer (down to 20 cm). Macrorhamphosus larvae were collected during both night and day, but myctophids appeared only at night. Larval and juvenile saury and Macrorhamphosus coincided in abundance. Myctophids also increased at stations where saury occurred abundantly at night. | |||||
| 言語 | en | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | 1975年1月,3月と11月に,本州南東方黒潮流域のサンマの再生産水域において,表層曳稚魚網 Larva net-Aと Neuston net Model-S を,調査船の両舷側で同時に5分間曳航し,採集された稚仔魚32種,2,022尾の中,サンマ稚仔を中心にそれらの生態について検討した.また,同水域において,1971~1975年,1月~5月の期間,稚魚網によって採集したサンマ仔·稚·幼魚22,793尾も加えて,日周活動の変化を考察した.1. サンマ稚仔に対する稚魚網と Neuston net 上段網(NN1)の採集性能に大差はないが,下段網(NN2)には殆んど採集されなかった.2. サンマ仔魚は昼夜に関係なく,少なくとも海面下20cm以浅の極表層生活者と考えられるが,稚魚になると日周活動が増大し,夜間には極表層に浮上し,サンマ仔魚及びその他の ichthyoneuston と生活環境を同じくする.幼魚は夜間のみ表層に出現する.3. 稚魚網で採集したサンマ稚仔の昼夜間における体長組成の差を考慮すれば,仔魚に対する1網当平均個体数は,分布密度を示す指標となり得る.但し,仔魚の数量算定には,極表層を定量採集できる器具と方法を改善し,浮漂生活をしている仔魚群の水平的な拡がりを確認する必要がある.4. 1月~3月,サンマの再生産水域において,サンマ稚仔と生活域を同じくし,数量的に最も関連が深い魚種は,サギフェ仔魚とハダカイワシ科魚類であった. | |||||
| 言語 | ja | |||||
| 書誌情報 |
ja : 東北区水産研究所研究報告 en : Bulletin of Tohoku Regional Fisheries Research Laboratory 巻 38, p. 89-101, ページ数 13, 発行日 1977-10 |
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| 出版者 | ||||||
| 出版者 | 東北区水産研究所 | |||||
| 言語 | ja | |||||
| 出版者 | ||||||
| 出版者 | Tohoku Regional Fisheries Research Laboratory | |||||
| 言語 | en | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 0049-402X | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN00167637 | |||||
| 情報源 | ||||||
| 識別子タイプ | Local | |||||
| 関連識別子 | tnf_k_38_89 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://agriknowledge.affrc.go.jp/RN/2010170643 | |||||
| 言語 | ja | |||||
| 関連名称 | 日本農学文献記事索引(agriknowledge) | |||||
