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50( 1) : 91- 102, 2004
A ct a Zoolog ica S in ica
*
**
万瑞景 姜言伟 庄志猛
, , 266071
, 1118- 1131 mm, ,
97- 125 , 100 , 01 04- 0111 mm 201 5- 2218 e ,
37 h , 30 min 21 56- 21 68 mm1 , 115
, 2 , 3 , ,
18 , 25 , 27 ,
29 , , , 57 , 79
, , 3 : ,
, , ;
,
, [ 50 ( 1) : 91- 102, 2004]
Morphological and developmental characters at the early stages of the tonguefish
*
Cy noglossus semilaevis
**
WAN Ru-i Jing , JIANG Yan-Wei, ZHUANG Zh-i M eng
Key La oratory for Sustaina le Utilization of Marine Fishery Resources, M inistry of Agriculture, Yellow Sea Fisheries Research Institute,
Chinese Academy of Fishery Sciences, Qingdao 266071, Shandong, China
Abstract Based on the data and t he samples from oth the hatchery experiments carried out during 1987 to 1989 and
from the large-scale seedling-rearing performed in the Laizhou Ming o Fish Farm in the autumn of 2002, we o served and
descri ed the morphological and developmental characters in t he early st ages of the tonguefish Cy nog lossus sem ilaev is
Gnther, 1873. In each late August during the experiment years, a pair of 135 hp trawlers w as used to catch adult
tonguefish in the central and w estern parts of t he Laizhou Bay , the Bohai Sea. Normally, those adult fish with the gonad
developing to Ô stage were chosen to e the parent candidates. As chosen, t he ody size of the female fish was 550- 670
mm in standard length with a ody weight ranged from 1 450 to 2 350 g while the ody length and weight of the male
fish were 270- 290 mm and 120- 230 g, respectively. The parent fish were transported to the hatchery and cultivated in
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