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志々伎湾の動物プランクトンに関する研究 (2)
https://fra.repo.nii.ac.jp/records/2008235
https://fra.repo.nii.ac.jp/records/20082358c9c5408-f167-4165-a8a7-50168a6d9a8c
| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2024-06-20 | |||||||||||
| タイトル | ||||||||||||
| タイトル | 志々伎湾の動物プランクトンに関する研究 (2) | |||||||||||
| 言語 | ja | |||||||||||
| タイトル | ||||||||||||
| タイトル | Zooplankton Investigations in Shijiki Bay (2) | |||||||||||
| 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 | 1975年9月から1976年4月までの動物プランクトン群集，特に内湾性橈脚類の分布特性について | |||||||||||
| 言語 | ja | |||||||||||
| その他（別言語等）のタイトル | ||||||||||||
| その他のタイトル | Zooplankton Communities from September 1975 to April 1976, with Special Reference to Distributional Characteristics of Inlet Copepods | |||||||||||
| 言語 | en | |||||||||||
| 著者 |
上田, 拓史
× 上田, 拓史
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| 抄録 | ||||||||||||
| 内容記述タイプ | Abstract | |||||||||||
| 内容記述 | Areal and seasonal occurrences of zooplankton were investigated from April 1975 to April 1976 in Shijiki Bay, Hirado Island, Kyushu. This paper contains the survey results from September 1975 to April 1976, and the discussion of the distributional characteristics of important copepods throughout the year. The settling volumes of plankton decreased from September to December and increased from December to February. Seasonal changes of all the zooplankton (excluding protozoa) and copepods were similar to those of the settling volumes. In copepods (adults and copepodites), Paracalanus parvus and several Oithona species were dominant from September to January, but these Oithona species had decreased in number in February. Acartia species, consisting of A. clausi and A. steueri, increased greatly in February and became the most dominant copepod in that month. In March, O. similis joined the dominant copepods, and finally the species composition of copepods in April 1976 was similar to that in April of the previous year. Generic composition of copepod nauplii did not necessarily correspond to that of adults and copepodites; relative abundance of Calanus, Centropages, Temora and Acartia in nauplii was much greater than those in adults and copepodites. Paracalanus parvus, Oithona nana and O. simplex were distributed quite evenly in the bay or somewhat diminished in number in the inner part of the bay, but their distributional patterns were clearly different from those of oceanic copepods. Euterpina acuti frons species was relatively abundant in the inner part of the bay in November. But, judging from the survey results in other months, the distributional characteristics of this species agree with those of the above three species. Compared with these four species, O. similis generally was less abundant in the inner part than in the mouth of the bay. Acartia clausi occurred only in the innermost part of the bay in the early reproductive season (January), but from February, it was distributed more evenly throughout the whole bay. Therefore, although the distributional pattern of this species became similar to that of above species from February, A. clausi seems to reproduce more in the inner part of the bay. A. steueri occurred only in the inner part of the bay during the reproductive season. Although Paracalanus crassirostris, Oithona brevicornis and O. oculata were distributed almost restrictedly in the inner part until August, they occurred more evenly in the whole bay in September and the maximal numbers were found around the boundary area of the inner part during October and November. O. oculata seems to be the most inner-distributed species of these three and O. brevicornis the most outer-distributed one. Oithona sp. 1, which is closely allied to O. nana. Occurred dominantly in the inner part of the bay from September to November, and the distribution of this species turned out similar to that of P. crassirostris. Distributional patterns of Oncaea spp. and Microsetella norvegica were similar to that of oceanic copepods throughout the year. Corycaeus spp. generally decreased in number from the mouth to the inner part of the bay, but sometimes occurred in the inner part more abundantly than oceanic species. As copepod nauplii are regarded, Pseudodiaptomus marinus and Eurytemora pacifica were restricted to the inner part of the bay throughout their reproductive seasons, indicating that these nauplii are good indexes to express inner bay conditions. The distributional characteristics of Acartia steueri, Oithona simplex, O. oculate and O. sp. 1 in inlet waters of Japan are reported herein for the first time. In previous works dealt with the distribution of inlet copepods in Japan, the above mentioned four species were probably confused with other similar species; A. steueri with A. clausi, O. simplex and O. oculata with O. rigida, and O. sp. 1 with O. nana. | |||||||||||
| 言語 | en | |||||||||||
| 抄録 | ||||||||||||
| 内容記述タイプ | Abstract | |||||||||||
| 内容記述 | 長崎県平戸島志々伎湾で1975年4月から1976年4月まで行われた動物プランクトン調査のうち,9月以降について次のような結果を得た.また,8月までの結果も合せて主要橈脚類の分布特性について検討した.1. 沈殿量は9月以降12月まで減少,1月から再び増加して3月に極大に達した.全動物プランクトンと橈脚類の出現量も沈殿量とほば同じ季節変化を示した.2. 橈脚類(成体およびコペポダイト)では,9月以降 Paracalanus parvus と Oithona 数種が優占するとともに,出現種の数も増加する傾向を示した.2月以降には, Acartia clausi と A. steueri が増加,3月からは O. similis も増加して1976年4月には前年4月とほば同様な種組成となった.橈脚類ノープリウスの属別組成は,成体とコペポダイトの組成に比べて,Calanus, Centropages, Temora および Acartia の出現比率が非常に高かった.3. 主要橈脚類(成体およびコペポダイト)のうち, Paracalanus parvus, Oithona nana, O. simplex の3種は全湾に比較的一様に分布するか,または最湾奥部で出現量が減少する傾向を示し,沿岸から内湾へかけての広域分布種とみなされる.Euterpina acutifronsは11月には湾奥部で最多出現量を示したものの,他の月の分布は上の3種と同様であり,同じ分布特性を持つ種とみなした.O. similis は前記3種の分布に類似するが,湾與部での減少傾向がより顕著であった.4. Acartia clausi は繁殖期の初期(1月)には湾奥部に集中して分布し,中期(2月)以降全湾に比較的一様に分布した.このため本来の繁殖域は湾奥部にあるとみなされ,上記5種より内湾的性格の強い種であるといえる. A. steueri は、種を識別したコペポダイトIV期以降の個体の分布が出現期を通して湾奥部のみに限られ,A.clausi より強内湾性種であることがうかがわれる.5. Paracalanus crassirostris, Oithona brevicornis, O. oculata は8月まで湾奥集中分布するが,9月には全湾に比較的一様分布,10·11月には湾中央部で多くなる分布を示した.この3種の分布を互いに比較すれば,より内湾的性格の強い種から O. oculata, P.crassirostris, O. brevicornis の順にならべられる.また,P. crassirostris と同じ分布特性をもつ種としてOithona sp.1が9~11月に多量に出現した.6. Oncaea spp. & Microsetella norvegica it,周年,沿岸外洋種と同様な分布であったが,M. norvegica の分布は他湾での内湾種的出現状況からみて例外的な結果といえる. Corycaeus spp.は沿岸外洋種と同様な分布をする月と,より湾奥部まで出現量が減少せずに分布する月とがあった.7. 橈脚類ノープリウスでは,Pseudodiaptomus marinus と Eurytemora pacifica が出現期を通して湾奥集中分布をなし,これらのノープリウスは強内湾的水塊の良い指標生物であるといえる,8. Acartia steueri, Oithona simplex, O. oculata, O. sp.1は,これまでの我国内湾性橈脚類の分布に関する研究では報告がなく,これらは他の近縁な種と分類上混同されていた可能性もある. | |||||||||||
| 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 58, p. 1-22, ページ数 22, 発行日 1982-10 |
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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_58_1 | |||||||||||
| 関連サイト | ||||||||||||
| 識別子タイプ | URI | |||||||||||
| 関連識別子 | https://agriknowledge.affrc.go.jp/RN/2010272453 | |||||||||||
| 言語 | ja | |||||||||||
| 関連名称 | 日本農学文献記事索引(agriknowledge) | |||||||||||
