眼斑双锯鱼仔稚鱼发育异速生长

运用生态学和传统理论生物学的研究方法, 对孵化后眼斑双锯(Amphiprion ocellaris)仔、稚鱼在早期生存和环境适应上的异速生长及器官优先发育生态学意义进行了研究, 以期为眼斑双锯鱼人工繁殖和育苗提供参考资料。以11日龄为眼斑双锯鱼仔、稚鱼的区分时期, 结果表明, 眼斑双锯鱼仔、稚鱼的感觉、摄食和游泳等器官快速分化, 均存在异速生长现象。在头部器官中, 吻长、眼间距、口宽和头高在仔鱼期均为正异速生长, 吻至鳃裂前缘长和眼径为负异速生长。在身体各部位中, 仔鱼期体高、躯干长、尾长、尾柄长、尾柄高和体厚均为正异速生长, 仅头长为负异速生长; 在游泳器官中, 仔鱼期眼斑双锯鱼尾鳍、背鳍、胸鳍、腹鳍和臀鳍均为正异速生长。稚鱼期眼斑双锯鱼头部、躯干及游泳等各器官均为负异速生长。眼斑双锯鱼这些关键器官的异速发育, 对适应环境因子变化具有重要的生态学意义。

ONTOGENETIC ALLOMETRY IN LARVAL AND JUVENILE CLOWN ANEMONEFISH AMPHIPRION OCELLARIS

Ecological and traditional theoretical biology experiments were conducted to study the allometric growth of larval and juvenile clown anemonefish Amphiprion ocellaris at their early life stage, thus providing fundamental data in artificial propagation of clown anemone fish. The 11th day post hatch of fish was the junction between the larval and juvenile clown anemone fish. The results indicated that organs of feeling, feeding, and swimming developed and differentiated rapidly with allometric patterns during the larval and juvenile stage. As for head organs, snout length, eye cross, mouth width and head height exhibited positive allometric growth in larval stage, while the snout-gill slit distance and eye diameter exhibited negative allometric growth. As for torso region organs, body height, trunk length, tail length, caudal peduncle length, caudal peduncle height and body thick exhibited positive allometric growth in larval stage, and only head length exhibited negative allometric growth. As for swimming organs, caudal fin, dorsal fin, pectoral fin, pelvic fin and anal fin all exhibited positive allometric growth. In juvenile stage, the head, torso and swimming organs of the clown anemone fish were all negative allometric growth. The allometric development of the key organs of clown anemone fish has important ecological significance for adapting to changes in environmental factors.