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山口県日本海におけるカタクチイワシの1回当たり産卵数の変動
https://fra.repo.nii.ac.jp/records/2011709
https://fra.repo.nii.ac.jp/records/2011709d4da9454-4ad4-4151-ae2c-dc9327178710
| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2024-10-11 | |||||
| タイトル | ||||||
| タイトル | 山口県日本海におけるカタクチイワシの1回当たり産卵数の変動 | |||||
| 言語 | ja | |||||
| タイトル | ||||||
| タイトル | Variability in batch fecundity of Japanese anchovy in Yamaguchi waters, the Sea of Japan | |||||
| 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 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| 著者 |
今井, 千文
× 今井, 千文× 楫取, 和明 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Batch fecundity was estimated for the Japanese anchovy in Yamaguchi waters, the Sea of Japan by analyzing ovarian egg diameter frequency distributions in 1988, 1989, 1991, and 1995. The gonad index (GI=(BW-GW)/SL3x103) increased from April to June and then decreased after July. The total number of yolked eggs in an ovary (NT) was evaluated using the gravimetric method. The relative value of total number of eggs (NTR=NT/SL3×103) was at a low level of about 10000-20000 in 1988 and 1989. The NTR was at its highest level in 1991 from 14000 to 42000. The NTR then dropped to a medium level of 14000-20000 in 1995. The mean diameter of the large egg group (MDL) decreased from April to July with the increased sea surface temperature (SST) in each year, but was at a low level in 1991. Batch fecundity (BF) was estimated by the number of large egg groups taken from ovaries which have an MDL greater than the value of a decreasing function of SST at three days before sampling date. The relative batch fecundity (BFR=BF/SL3×103) increased from April to June, but decreased after July in each year. The BFR was at a low level of 1100-5100 in 1988 and 1989, and at a high of 3800-9200 in 1995. In 1991, the BFR was at the medium level of 1700-6400 in spite of the high NTR because the proportion of the large egg group was low. | |||||
| 言語 | en | |||||
| 書誌情報 |
ja : 水産大学校研究報告 en : Journal of National Fisheries University 巻 48, 号 4, p. 281-291, ページ数 11, 発行日 2000-03 |
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| 出版者 | ||||||
| 出版者 | 水産大学校 | |||||
| 言語 | ja | |||||
| 出版者 | ||||||
| 出版者 | National Fisheries University | |||||
| 言語 | en | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 0370-9361 | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN00124678 | |||||
| 情報源 | ||||||
| 識別子タイプ | Local | |||||
| 関連識別子 | fishu_k_48_281 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://agriknowledge.affrc.go.jp/RN/2010612463 | |||||
| 言語 | ja | |||||
| 関連名称 | 日本農学文献記事索引(agriknowledge) | |||||
