CAJ | 학술논문

为确定黑莓鲈仔鱼的饥饿耐受能力及死亡不可逆点（PNR），采用实验生态学方法研究饥饿对黑莓鲈仔鱼摄食、生长与发育的影响。结果表明，在19．5～22．8℃水温条件下：①黑莓鲈仔鱼在6日龄开口摄食，8日龄卵黄囊消失，其混合营养期仅维持2 d 左右，属于易遭受饥饿胁迫鱼类；②仔鱼最高初次摄食率出现在9日龄，初次摄食期仔鱼的 PNR 发生在孵化后第11～12 d，仔鱼具有摄食能力的时间仅4～5 d，且在到达 PNR 后仅1 d 多即全部死亡，其耐受饥饿的能力较差；③在饥饿胁迫条件下的仔鱼对卵黄囊和油球的吸收进程明显慢于正常投喂组仔鱼，且随着饥饿程度的不断加深，仔鱼的生长发育趋于停滞甚至出现负增长；仔鱼在 PNR 期出现胸角，并且表现出一系列明显的由饥饿所导致的形态和行为学特征。
위학정흑매로자어적기아내수능력급사망불가역점（PNR），채용실험생태학방법연구기아대흑매로자어섭식、생장여발육적영향。결과표명，재19．5～22．8℃수온조건하：①흑매로자어재6일령개구섭식，8일령란황낭소실，기혼합영양기부유지2 d 좌우，속우역조수기아협박어류；②자어최고초차섭식솔출현재9일령，초차섭식기자어적 PNR 발생재부화후제11～12 d，자어구유섭식능력적시간부4～5 d，차재도체 PNR 후부1 d 다즉전부사망，기내수기아적능력교차；③재기아협박조건하적자어대란황낭화유구적흡수진정명현만우정상투위조자어，차수착기아정도적불단가심，자어적생장발육추우정체심지출현부증장；자어재 PNR 기출현흉각，병차표현출일계렬명현적유기아소도치적형태화행위학특정。
Effect of starvation on the feeding,growth and development of Pomoxis nigromacufatus larvae were investigated at 19.5-22.8℃ using an experimental ecological method.The tolerance to starvation and the point of no return (PNR)of P.nigromacufatus larvae were determined.The results showed that (a)the initial feeding of the larvae started at 6 days of age,the yolk sac disappeared at 8-day-old,the mixed dieting period was about 2 days, and the larvae were vulnerable to starvation stress;(b)the highest initial feeding rate of the larvae occurred when they were 9-day-old,the PNR was determined to be 11 to 12 days after hatching,their feeding last for merely 4 to 5 days,and they died one day after PNR;and (c)as compared with their counterparts under normal feeding,the starved larvae were slow to utilize yolk sac and fat globules,their growth became stagnant or regressive as the starvation continued,and they began to show pectoral angles at PNR with a series of apparent,hunger-induced morphological and behavioral characteristics.