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油谷湾における底生魚類相の時空間的変動
https://fra.repo.nii.ac.jp/records/2008221
https://fra.repo.nii.ac.jp/records/200822187dc5162-ee6d-45ca-a6dc-311beb1ffd87
| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2024-06-20 | |||||
| タイトル | ||||||
| タイトル | 油谷湾における底生魚類相の時空間的変動 | |||||
| 言語 | ja | |||||
| タイトル | ||||||
| タイトル | Temporal and Spatial Changes of Demersal Fish Fauna in Yuya Bay | |||||
| 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 | |||||
| 著者 |
大森, 迪夫
× 大森, 迪夫 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | A series of ecological investigations on the survival of red sea bream Pagrus major in Yuya Bay, Yamaguchi Prefecture, was carried out from 1975 through 1977 by the members of the Shimonoseki Branch of the Seikai Regional Fisheries Research Laboratory. As a part of the whole study, the temporal and spatial changes of the demersal fish fauna are important for the ecological study as a primary information. Based on the WILLIAMS' method for the analysis of three-dimensional data (site × species × time), catch records of experimental operations gathered with a type of beam trawl were analysed. The results obtained are summarized as follows: 1) The whole area is divided based on the difference in the species composition of fish assemblage. Area A: a zonal area along the southern coast of the bay and Oura Inlet located in the northeastern part of the bay. Area B : a zonal area from the bay head through the central region to the bay entrance. Area C: a small area around Station 3 in the innermost part of the bay. Area D: a coastal small area on the east side of Takeshima Is. Furthermore both Areas A and B can be divided into two sub-areas: the entrance side and the head side of each area, named A1, A2, B1, B2 respectively. 2) These areas can be characterized by the environmental condition. Area A is a region often occupied by the open sea water and its bottom sediments are relatively coarse. In contrast, Area B has a silty bottom and is often affected by a fresh water inflow from the Kakebuchi River. Sub-areas A, and B1 within each area are regions with the higher embayment degree than A2 and B2 respectively. Area C has a very coarse bottom environed by a silty bottom. Area D is distinctive from the other areas for being located within a dense Zostera belt. 3) Classifying species based on the difference in catch among the sampling stations, two groups can be discriminated from each other. The first is inhabiting Area A at a high density and the other is living densely in Area B. 4) Classifying dates based on the difference in the species composition among the sampling times, five periods are discriminated from one another. Two of them are the seasons when the species composition keeps a stable state and the others are the transitional seasons between them. The formers are periods from late June to late August and that from early February to mid-March, and the latters are from late August to early September, mid-December and late May. 5) Taking into consideration the seasonal changes in the alternation of species, the species equitability and the number of the species occurring, the change in the species composition during the period before and after early September seems to be the reflection of the fluctuations in the species equitability caused by the extreme increase and decrease in population size of a few species. In mid-December it seems to be the reflection of both the decrease of the number of the species occurring and the fluctuation of the species equitability. | |||||
| 言語 | en | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | 油谷湾における底生魚類相の時空間的変動の様相を簡明に記述することを目的として,WILLIAMS の場所×種×時期の3次元データーの解析方法を用いて,小型底びき網試験操業記録の解析を行い以下の結果を得た.1) 種組成の違いに関して場所を類別すると,A:湾南岸沿いの海域及び湾北東部の入江である大浦,B:湾軸に沿った海域,C:湾奥部の Stn. 13, D:竹島の岸側の海域の 4つの海域に類別される.さらに,A及びB 海域はそれぞれ湾口側と湾奥側の A1,A2及び B1,B2に細分される.2) このような海域の区分は底質の粒度の違いや,アマモ場の発達の程度,内湾度の違い等の環境条件の違いとよく対応する.3) 採集尾数の場所による違いに関して種を類別すると2つの種群が区別される.それらの種群はそれぞれ A 海域で分布密度が高い種と B 海域で分布密度が高い種である.4) 種組成の違いに関して時期を類別すると6月下旬から8月下旬に至る時期及び2月上旬から3月中旬に至る時期の魚類相の安定期と9月上旬前後,12月中旬前後及び5月下旬前後の変動期が区別された.5) 種均衡度,出現種数,交代種数の季節変化から考え,9月上旬前後の種組成の変動は出現種の交代を反映しているというよりは幾つかの種の個体数の増減による種均衡度の変化を反映したものと考えられる。12月中旬前後のそれは出現種数の減少と均衡度の変化によるものと考えられるが,5月下旬のそれはこのような解析では説明されえなかった。 | |||||
| 言語 | ja | |||||
| bibliographic_information |
ja : 西海区水産研究所研究報告 en : Bulletin of the Seikai Regional Fisheries Research Laboratory 巻 61, p. 235-244, ページ数 10, 発行日 1984-08 |
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| 出版者 | ||||||
| 出版者 | 西海区水産研究所 | |||||
| 言語 | ja | |||||
| 出版者 | ||||||
| 出版者 | Seikai Regional Fisheries Research Laboratory | |||||
| 言語 | en | |||||
| item_10002_source_id_9 | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 0582-415X | |||||
| item_10002_source_id_11 | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN00393385 | |||||
| 情報源 | ||||||
| 識別子タイプ | Local | |||||
| 関連識別子 | snf_k_61_235 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://agriknowledge.affrc.go.jp/RN/2010302893 | |||||
| 言語 | ja | |||||
| 関連名称 | 日本農学文献記事索引(agriknowledge) | |||||
