CAJ | 학술논문

采用切片技术和光学显微镜对1~50日龄太平洋鳕Gadus macrocephalus仔鱼的消化系统进行组织学和形态学观察。结果表明：初孵仔鱼消化系统基本没有分化，口和肛门尚未与外界相通，可见肝脏和胰脏；3日龄时，口裂形成，肠道开始分化；6日龄时，消化道已经分化出口咽腔、食道、胃前体、肠和直肠，上下颌可张合，初步具备摄食能力；12日龄时，卵黄囊完全消失，肠道皱褶和黏液细胞数量逐渐增多，消化系统逐渐发育完成，营外源性营养；仔鱼发育至47日龄时，肠道呈螺旋状，消化器官和消化腺趋于完善，接近成鱼。本研究可为太平洋鳕苗种的科学管理和营养饲料学方面的深入研究提供理论依据。
채용절편기술화광학현미경대1~50일령태평양설Gadus macrocephalus자어적소화계통진행조직학화형태학관찰。결과표명：초부자어소화계통기본몰유분화，구화항문상미여외계상통，가견간장화이장；3일령시，구렬형성，장도개시분화；6일령시，소화도이경분화출구인강、식도、위전체、장화직장，상하합가장합，초보구비섭식능력；12일령시，란황낭완전소실，장도추습화점액세포수량축점증다，소화계통축점발육완성，영외원성영양；자어발육지47일령시，장도정라선상，소화기관화소화선추우완선，접근성어。본연구가위태평양설묘충적과학관리화영양사료학방면적심입연구제공이론의거。
The morphological and histological development of digestive system was observed in larval Pacific cod Gadus macrocephalus from 1 to 50 days post hatching ( DPH) under a light microscope. No differentiation in the di-gestive system was found at hatching, the mouth and anus were not opened, and liver and pancreas were appeared. The mouth gape was formed at 3 DPH and the intestine began to be differentiated. At 6 DPH, the digestive tract was consisted of buccopharynx, oesophagus, stomach anlage, intestine and rectum, with movable premaxilla and maxilla, with initial feeding capacity. The yolk sac was depleted completely at 12 DPH, and the intestine folds and mucus cells increased progressively in number, with almost complete digestive system and onset of exogenous nutri-tion. The intestine was spiral in shape, and the digestive organs and associated glands became further development steadily, similar to that in adult Pacific cod at 47 DPH. The findings provide a theoretical basis for the scientific management and nutrition for Pacific cod larva rearing.