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采用实验生态学方法对条纹锯仔、稚、幼鱼形态发育的异速生长模式进行研究。对条纹锯(0–80日龄)的可量性状进行测量并运用统计学方法进行分析。结果表明,0–80日龄条纹锯全长的生长符合Y=4.529-(9.227×10-5)X3+0.015X2-0.189X(R2=0.994),干重增长符合Y=0.002X3-0.151X2+3.257X-18.232(R2=0.993),其变化曲线呈“J”型增长。多数功能器官具有异速生长的特性,与摄食、运动相关的功能器官的生长拐点相对较早,在拐点之前,相对于全长呈正异速生长,拐点之后相对于全长呈负异速生长或等速生长。口裂、吻长、眼径、胸鳍、尾鳍的生长拐点分别为20、44、32、36、19日龄,其他相关器官的生长拐点相对较晚,头长、头高、腹长、体高的生长拐点分别为56、37、44、60日龄,其中头长相对于全长在拐点之前呈负异速生长,拐点之后呈等速生长。条纹锯部分功能器官的优先发育保证了在个体发育过程中的早期摄食能力和对敌害的躲避能力的完善,有效地提高了其生存能力。条纹锯异速生长模型的建立,有助于针对性地为其提供适宜条件,从而获得其最适和最大生长效能,为人工繁育和养殖条纹锯提供理论基础。
The experimental and ecological methods were used to study the allometric growth patterns of the morphological development of striped sawfish, juvenile and juvenile. The measurable traits of striped sawfish (0-80 days old) were measured and analyzed using statistical methods. The results showed that the growth of striped sawn lumber from 0 to 80 days was in accordance with Y = 4.529- (9.227 × 10-5) X3 + 0.015X2-0.189X (R2 = 0.994), the dry weight growth accorded with Y = 0.002X3-0.151 X2 + 3.257X-18.232 (R2 = 0.993). The curve shows “J” type growth. Most functional organs have the characteristics of allometric growth. The functional organs associated with ingestion and exercise have a relatively inflexible growth point of inflection, relatively positive growth relative to full length before inflection, negative allopy growth relative to full length after inflection, or Constant growth. The inflexion point of growth of mouth, crack, kiss length, eye diameter, pectoral fin and caudal fin were 20, 44, 32, 36 and 19 days old respectively. The inflexion point of growth of other related organs was relatively late, the head length, head height, abdominal length and body height The growth inflection points were 56, 37, 44 and 60 days old, respectively, of which the head length showed negative allopy growth before the inflection point and the inflexion point showed constant growth. The preferential development of some functional organs of striped sawfish ensures the improvement of early feeding ability and avoidance ability of enemy predators in the process of individual development and effectively improves their viability. The establishment of the allometric growth model of striped saws helps to provide suitable conditions for them to obtain their optimum and maximum growth performance and provides a theoretical basis for artificial breeding and breeding of striped saws.