CAJ | 학술논문

根据2009年8月-12月在长江常熟江段采集的362尾似鳊Pseudobrama simoni样本,对其年龄、生长特征和形态特征进行了研究。结果表明：似鳊种群由1~3龄共3个年龄组组成,1龄鱼为优势群体,占总数的51.3%；体长分布范围为62.33~133.65 mm,优势体长范围为75~110 mm (占总数的75.41%),体质量分布范围为3.70~46.10 g,优势体质量范围为3.70~18.70 g (占总数的80.11%)；雌、雄个体的体长、体质量差异极显著(P<0.01),丰满度、体高、头长等31个形态指标无显著性差异(P>0.05)；体长与鳞径的关系式为L♀=391.67R4-2211.8R3+4609.7R2-4171.4R+1463.2(n=156,P<0.001,r2=0.6973), L♂=171.22R4-895.44R3+1719.8R2-1406.4R+486.47(n=178,P<0.001,r2=0.7821)；体长和体质量的关系式为W♀=4.52×10-6L3.2901(n=156,r2=0.94), W♂=1.09×10-5L3.0915(n=178,r2=0.98)； Von Bertalanffy生长方程为Lt♀=142.31×[1-e-0.1125(t+8.3442)], Lt♂=153.73×[1-e-0.1024(t+6.8309)]。研究表明,雌性似鳊体质量生长拐点年龄为2.24龄,雄性为3.96龄,常熟江段似鳊呈低龄化态势。
근거2009년8월-12월재장강상숙강단채집적362미사편Pseudobrama simoni양본,대기년령、생장특정화형태특정진행료연구。결과표명：사편충군유1~3령공3개년령조조성,1령어위우세군체,점총수적51.3%；체장분포범위위62.33~133.65 mm,우세체장범위위75~110 mm (점총수적75.41%),체질량분포범위위3.70~46.10 g,우세체질량범위위3.70~18.70 g (점총수적80.11%)；자、웅개체적체장、체질량차이겁현저(P<0.01),봉만도、체고、두장등31개형태지표무현저성차이(P>0.05)；체장여린경적관계식위L♀=391.67R4-2211.8R3+4609.7R2-4171.4R+1463.2(n=156,P<0.001,r2=0.6973), L♂=171.22R4-895.44R3+1719.8R2-1406.4R+486.47(n=178,P<0.001,r2=0.7821)；체장화체질량적관계식위W♀=4.52×10-6L3.2901(n=156,r2=0.94), W♂=1.09×10-5L3.0915(n=178,r2=0.98)； Von Bertalanffy생장방정위Lt♀=142.31×[1-e-0.1125(t+8.3442)], Lt♂=153.73×[1-e-0.1024(t+6.8309)]。연구표명,자성사편체질량생장괴점년령위2.24령,웅성위3.96령,상숙강단사편정저령화태세。
The age, growth and morphological features were investigated in 362 samples of Pseudobrama simoni col-lected in Changshu section of Yangtze River from August to December of 2009 in order to reveal the population and growth status. It was found that the population of Pseudobrama simoni was comprised of 3 age classes ranging from dominantl 1 year old individuals (accounting for 51. 3%) to 3 year old individuals. The population of Pseudobrama simoni was changed from 62. 33 mm to 133. 65 mm in body length, primarily between 75 mm to 110 mm, represen-ting 75. 41% of the samples. The Pseudobrama simoni had body weight from 3. 70 g to 46. 10 g, mostly between 3 . 70 g to 18 . 70 g accounting for 80 . 11%, with significant differences in body length and body weight and without significant differences in condition factor, body depth, head length and other 28 morphological features between fe-male and male. The regression equation between scale radius ( R) and body length ( L) was expressed as L♀=391. 67R4-2211. 8R3+4609. 7R2-4171. 4R+1463. 2(n=156,P<0. 001,r2=0. 6973),and L♂=171. 22R4-895. 44R3+1719. 8R2-1406. 4R+486. 47(n=178,P<0. 001,r2=0. 7821),while the regression equation between body length and body weight(W) was described as W♀=4. 52×10-6L3.2901(n=156,r2=0. 94),W♂=1. 09×10-5 L3.0915(n=178,r2=0. 98). The growth characteristics of the fish were described by the Von Bertalanffy growth equa-tion Lt♀=142. 31 ×[1-e-0.1125(t+8.3442) ],and Lt♂=153. 73 ×[1-e-0.1024(t+6.8309) ]. The growth inflexion point was found to be t=2. 24 year old in the female, and t=3. 96 year old in the male, young tendency in the lower reaches of Yangtze River.