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＜departmental bulletin paper＞
Early Developments and Morphometrical Comparisons of Reared Chinese and Japanese Forms of Three-line Grunt

Creator
Author PID
K001623
Creator Name
吉松, 隆夫
Yoshimatsu, Takao
Affiliation
Affiliation Name
九州大学農学部附属水産実験所
Fishery Research Laboratory, Faculty of Agriculture, Kyushu University
Creator Name
光永, 直樹
Mitsunaga, Naoki
Affiliation
Affiliation Name
九州大学農学部附属水産実験所
Fishery Research Laboratory, Faculty of Agriculture, Kyushu University
Language
Japanese
Publisher
九州大學農學部
Faculty of Agriculture, Kyushu University
Date
2000-02
Source Title
Science bulletin of the Faculty of Agriculture, Kyushu University
Vol
54
Issue
3/4
First Page
121
Last Page
131
Publication Type
Version of Record
Access Rights
open access
JaLC DOI
https://doi.org/10.15017/23641
Related DOI
九州大學農學部學藝雜誌 || 54(3/4) || p121-131
Science bulletin of the Faculty of Agriculture, Kyushu University || 54(3/4) || p121-131
http://www.agr.kyushu-u.ac.jp/
Related URI
九州大學農學部學藝雜誌 || 54(3/4) || p121-131
Science bulletin of the Faculty of Agriculture, Kyushu University || 54(3/4) || p121-131
http://www.agr.kyushu-u.ac.jp/
Relation
九州大學農學部學藝雜誌 || 54(3/4) || p121-131
Science bulletin of the Faculty of Agriculture, Kyushu University || 54(3/4) || p121-131
http://www.agr.kyushu-u.ac.jp/

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Details

Record ID
23641
Peer-Reviewed
Unrefereed
ISSN
0368-6264
NCID
AN0005519X
Notes
Early development and growth of laboratory-reared Chinese three-line grunt was investigated from a series of specimens to make morphological comparison between two forms of the three-line grunt: Chinese and Japanese forms. Furthermore a precise comparison of early growths of these two forms was carried out with controlling their rearing conditions identical. The morphological characteristics of Chinese three-line grunt at early developmental stages were almost same as those of Japanese form reported previously, in terms of pigmentation pattern, body-size at each developmental stage, the sequences of the developments of fin-rays, digestive organ and squamation. Nevertheless the early growth of the Chinese form exceeded that of the Japanese form. In addition to that, although they were reared under identical conditions, the ratios of various body parts against body length and some of the meristic characteristics of the Chinese form were significantly different from those of the Japanese form.
中国産イサキの初期発育を飼育条件下で検討するとともに,ほぼ同一条件下で飼育されて得られた中国産および日本産イサキ種苗の形態と初期成長の比較を行った.中国産イサキの孵化仔魚は体躯および膜鰭上の黄色素胞が特徴的で,日齢2で開口し摂餌を開始した.日齢3で開鰾,日齢5で腸管が1回転した.日齢9で尾鰭原基が出現,日齢13頃より背鰭および臀鰭の原基が出現し,また脊索末端の上屈が開始した.日齢19,12.3±1.9mmTL頃より鰭条数が定数に達した稚魚が出現.日齢25頃より本種幼魚に特徴的な体側黒色素胞の縦帯が明瞭となった.日齢36,36.0±2.8mmTL迄に魚体はほぼ完全に被鱗し,成魚型の腸管走行様式も確立.またその他の形態的特徴からもこの時期若魚へ移行したと考えられた.以上,これらの初期発育段階における形態変化には,基本的に既報の飼育日本産イサキ仔稚魚と大差は認められなかった. しかしながらほぼ同一条件で飼育された180日齢の両イサキ標本の,体各部の体長に対する相対比および計数形質を比較したところ,吻長,体高,尾柄長,尾柄高,背鰭軟条部基底長,臀鰭基底長,眼径,臀鰭前長,背鰭棘部基底長の相対比および有孔側報鱗数と側線下方横列鱗数,また背鰭の軟条数と臀鰭の軟条数,さらに脊椎骨数について統計的有意差が認められ,また初期成長も中国産イサキの方が有意に良好であった.
Created Date 2012.07.31
Modified Date 2022.11.11

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