CAJ | 학술논문

研究了骨唇黄河鱼仔稚鱼耳石在实验室养殖条件下的发育过程和生长特点,确证了轮纹沉积规律。结果表明,在14.0-17.8℃孵化条件下,微耳石和矢耳石在受精后96h 30min出现,星耳石在出膜后第16天出现。仔稚鱼生长过程中矢耳石形状变化较大,由出膜时的圆形发育到稳定时的箭矢状。微耳石由近圆形发育成贻贝形,其中心核位置随发育明显偏移。星耳石形状不规则,从出现时的心形发育成为星芒状。微耳石和矢耳石在前后轴方向上后区的生长快于前区(P<0.05)；在背腹轴方向上,微耳石腹区的生长快于背区(P<0.05),矢耳石背区的生长快于腹区(P<0.05),两对耳石的前后区半径之和与全长均呈线性相关。微耳石和矢耳石的第1个轮纹均在出膜后第2天形成,新增的轮纹数(微耳石IL,矢耳石IS)与出膜后的天数(D)表现出显著的线性相关,方程分别为： IL=0.9911D-1.0008(R2=0.9971, n=220, P<0.001)和IS=0.9925D-0.10873(R2=0.9919, n=161, P<0.001),方程的斜率与1均无显著差异(P>0.05),表明两对耳石轮纹沉积均呈日周期性,生长轮为日轮。研究结果丰富了骨唇黄河鱼的发育生物学资料,可为研究其自然种群早期生活史提供参考。
연구료골진황하어자치어이석재실험실양식조건하적발육과정화생장특점,학증료륜문침적규률。결과표명,재14.0-17.8℃부화조건하,미이석화시이석재수정후96h 30min출현,성이석재출막후제16천출현。자치어생장과정중시이석형상변화교대,유출막시적원형발육도은정시적전시상。미이석유근원형발육성이패형,기중심핵위치수발육명현편이。성이석형상불규칙,종출현시적심형발육성위성망상。미이석화시이석재전후축방향상후구적생장쾌우전구(P<0.05)；재배복축방향상,미이석복구적생장쾌우배구(P<0.05),시이석배구적생장쾌우복구(P<0.05),량대이석적전후구반경지화여전장균정선성상관。미이석화시이석적제1개륜문균재출막후제2천형성,신증적륜문수(미이석IL,시이석IS)여출막후적천수(D)표현출현저적선성상관,방정분별위： IL=0.9911D-1.0008(R2=0.9971, n=220, P<0.001)화IS=0.9925D-0.10873(R2=0.9919, n=161, P<0.001),방정적사솔여1균무현저차이(P>0.05),표명량대이석륜문침적균정일주기성,생장륜위일륜。연구결과봉부료골진황하어적발육생물학자료,가위연구기자연충군조기생활사제공삼고。
Daily observations were made on the morphological development and the growth in increments of the otolith in larvae and juvenile of Chuanchia labiosa in rearing conditions. The sagitta and the lapillus appeared at 96h and 30min after the fertilization, and the asteriscus first appeared at 16 days post hatching. The shape of the sagitta was rounded at hatching and gradually changed into long elliptical with a long pointy posterior in the end. The lapillus was also rounded at hatching, and changed into a mussel shape at the end of the experiment. Compared to the sagitta and the lapillus, the shape of the asteriscus remained mussel-like and was relatively stable during the development. We com-pared the data of the radius of the dorsal, ventral, anterior and posterior areas in the sagitta and the lapillus. It showed that in the lapillus the growth of the posterior was faster than that of the anterior (P<0.05), and the ventral grew faster than the dorsal (P<0.05); in the contrast the dorsal grew faster than the ventral in the sagitta (P<0.05). The combined length of the radius of the anterior and the posterior of the sagitta was linearly related to the total length of the larvae and the juvenile, and the same was observed in the lapillus. The first increment on the sagitta and the lapillus appeared on the second day post hatching and from then on there was one new increment formed every day. The number of in-crements on the lapillus (IL) and the sagitta (IS) showed a linear relationship with the number of days post hatching (D), with the equations of IL=0.9911D-1.0008 (R2=0.9971, n=220, P<0.001) and IS=0.9925D-0.10873 (R2=0.9919, n=161, P<0.001), respectively. The slopes of the equations were statistically close to 1.0 (P>0.05). These results suggested that the number of the otolith increments increased by 1 on a daily basis. Our study contributed to the understanding in the development of C. labiosa, as well as in its early life history in the natural environment.