Immigration Period and Age of Anguilla japonica Glass-eels Entering Rivers in Northern Kyushu,Japan during 1994
-
- Kawakami Yutaka
- Department of Fisheries, Faculty of Agriculture, Kyushu University
-
- Mochioka Noritaka
- Department of Fisheries, Faculty of Agriculture, Kyushu University
-
- Nakazono Akinobu
- Department of Fisheries, Faculty of Agriculture, Kyushu University
書誌事項
- タイトル別名
-
- Immigration Period and Age of <i>Anguilla japonica</i> Glass-eels Entering Rivers in Northern Kyushu, Japan during 1994
- Immigration Period and Age of Anguilla
- Immigration period and age of Anguilla japonica glass‐eels entering rivers in Northern Kyushu, Japan during 1994
この論文をさがす
抄録
The immigration period, age at immigration, and hatching dates of 174 glass-eels Anguilla japonica caught in northern Kyushu during 1994 were examined, based upon continuous sampling and counting of the daily increments of the sagittal otoliths.<br> Immigration of glass-eels to northern Kyushu occurred from February to July, four months later than on the Pacific coast. Examination of otoliths showed that glass-eels had entered into freshwater at the mouth of rivers at the age of 169±15 days (mean±SD). Hatching dates extended from August 1993 to January 1994 and the mean ages of glass-eels of different hatch months were as follows: August-184, September-166, October-169 and November-168 days. The peak spawning month was September. Otolith microstructure showed three separable phases, i. e., leptocephalus stage, metamorphosing stage and glass-eel in sea water stage. Age at the freshwater mark and duration of the leptocephalus stage of August-hatched eels were significantly older and longer, respectively, than those eels hatched in other months.
収録刊行物
-
- Fisheries science
-
Fisheries science 64 (2), 235-239, 1998
公益社団法人 日本水産学会
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390001204428778368
-
- NII論文ID
- 130003742129
- 10004873791
-
- NII書誌ID
- AA10993718
-
- NDL書誌ID
- 4462724
-
- ISSN
- 09199268
-
- 本文言語コード
- en
-
- データソース種別
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可