CAJ | 학술논문

为了确定大泷六线鱼(Hexagrammos otakii)仔鱼的初次摄食饥饿不可逆点(PNR),作者利用人工孵化得到的大泷六线鱼初孵仔鱼,在水温(16±0.5)℃、盐度31条件下,研究了饥饿对大泷六线鱼前期仔鱼生长的影响,并确定了仔鱼的初次摄食饥饿不可逆点。结果表明,仔鱼3日龄开口摄食,卵黄于7日龄消耗完毕,油球于8日龄消耗完毕,混合营养期为5~6 d,饥饿对仔鱼卵黄吸收速度影响显著(P＜0.05),对油球的吸收在仔鱼开口前影响不显著(P＞0.05),仔鱼开口后影响显著(P＜0.05)。摄食仔鱼生长呈线性增加,饥饿仔鱼生长呈现先升高后降低的趋势。仔鱼饥饿不可逆点出现在8日龄和9日龄之间。
위료학정대롱륙선어(Hexagrammos otakii)자어적초차섭식기아불가역점(PNR),작자이용인공부화득도적대롱륙선어초부자어,재수온(16±0.5)℃、염도31조건하,연구료기아대대롱륙선어전기자어생장적영향,병학정료자어적초차섭식기아불가역점。결과표명,자어3일령개구섭식,란황우7일령소모완필,유구우8일령소모완필,혼합영양기위5~6 d,기아대자어란황흡수속도영향현저(P＜0.05),대유구적흡수재자어개구전영향불현저(P＞0.05),자어개구후영향현저(P＜0.05)。섭식자어생장정선성증가,기아자어생장정현선승고후강저적추세。자어기아불가역점출현재8일령화9일령지간。
In order to determine the definition of the point of no return(PNR) of the larvae of Hexagrammos otakii Jordan et Starks, we studied the effect of starvation on growth of the larvae of Hexagrammos otakii Jordan et Starks under the condi-tion with water temperature of 16℃±0.5℃ and salinity of 31‰, and the definition of the PNRwas determined. Larvae opened mouth at 3 day after hatching(DAH);Yolk and oil globules were completely absorbed at 7 DAH and 8 DAH, re-spectively. The mixing diet period was about 5-6 days. The influence of starvation on the absorption rate of yolk was sig-nificant (P<0.05). The influence of starvation on the absorption rate of oil globules was not significant (P>0.05) before larvae opened mouth, but significant (P<0.05) after larvae opened mouth. The total length of fed larvae increased continu-ously, while the starving larvae decreased in total length after 8 DAH. The PNR was between 8 DAH and 9 DAH.