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＜departmental bulletin paper＞
On the egg development and hatched larvae of Lethrinus nematacanthus Bleeker

Creator
Creator Name
水戸, 敏
Mito, Satoshi
Affiliation
Affiliation Name
九州大学農学部水産学教室
Laboratory of Fisheries Science, Faculty of Agriculture, Kyushu University
Language
Japanese
Publisher
九州大學農學部
Faculty of Agriculture, Kyushu University
Date
1956-03
Source Title
Science bulletin of the Faculty of Agriculture, Kyushu University
Vol
15
Issue
4
First Page
497
Last Page
500
Publication Type
Version of Record
Access Rights
open access
JaLC DOI
https://doi.org/10.15017/21400
Related DOI
九州大學農學部學藝雜誌 || 15(4) || p497-500
Science bulletin of the Faculty of Agriculture, Kyushu University || 15(4) || p497-500
http://www.agr.kyushu-u.ac.jp/
Related URI
九州大學農學部學藝雜誌 || 15(4) || p497-500
Science bulletin of the Faculty of Agriculture, Kyushu University || 15(4) || p497-500
http://www.agr.kyushu-u.ac.jp/
Relation
九州大學農學部學藝雜誌 || 15(4) || p497-500
Science bulletin of the Faculty of Agriculture, Kyushu University || 15(4) || p497-500
http://www.agr.kyushu-u.ac.jp/

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Details

Record ID
21400
Peer-Reviewed
Unrefereed
Subject Terms
イトフエフキ
卵発生
仔魚期
Lethrinus nematacanthus Bleeker
ISSN
0368-6264
NCID
AN0005519X
Notes
Lethrinus nematacanthus Meeker is widely distributed from southern Japan to tropical Pacific. The spawning season seems to extend from early June to early August in western coasts of Kyushu. The author operated artificial insemination of this fish on June 8, 27 and 30, 1954, at Tamanoura, Goto Islands, Nagasaki Prefecture, and observed the egg development and hatched larvae (Plate 14, figs. 1-14). The egg is bouyant, colorless and spherical in shape, measuring 0.78-0.83 mm in diameter, with a single colorless oil-globule measuring 0.16-0.19 mm in diameter which is transformed into elliptical shape, measuring 0.15-0.16 x 0.19-0.20 mm, during development (Figs. 5-10). The hatching took place in 39 hours at the water temperature 19.2-21.5° C, and in 27 hours at 23.0-24.2℃. The larva just hatched is 1.60-1.80 mm in total length with the oil-globule situated in the anterior part of the yolk (rarely in the middle of yolk), partly protruding from the yolk surface. The myotome number is 9+17=26 (vertebral number of this fish is 10+14=24) (Fig. 10). In 2.5 days after hatched the yolk was entirely consumed and the anus advanced forward to under 4th myotome (Fig. 14).
イトフエフキ Lethrinus nematacanthus Bleeker はフエフキダイ科 Lethrinidae に属し, 我国中部以南から太平洋の温熱帯域に広く分布する沿岸性の小型魚で, 全長250mmを越すものは稀である. 筆者は1954年(昭和29年)6月に,長崎県五島列島の玉之浦町において,本種の人工授精を行い,卵内発生と孵化仔魚とを観察する機会を得たので報告する.
Created Date 2012.03.21
Modified Date 2023.12.06

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