CAJ | 학술논문

开展“新吉富”罗非鱼消化道指数以及胃蛋白酶和胰蛋白酶活性动态变化研究，结果表明，“新吉富”罗非鱼比肠长为4.921±0.187，比肠质量为0.018±0.002，比肝质量为0.014±0.003，比内脏质量为0.039±0.007，表现为偏植食性为主的杂食性鱼类特征。空腹再投喂后0～96 h ，胃蛋白酶活性于12h 增加至最大值167.872 U ，投喂12～96 h 其活性降低，特别是12～24 h ，减少幅度较大。同时检测其肝脏、前肠、中肠、后肠中胰蛋白酶活性动态变化情况，各组织的胰蛋白酶活性比较，肝＜中肠＜前肠＜后肠，各部位的胰蛋白酶活性总体呈先增加达最大值后，再减小的趋势，各部位胰蛋白酶活性差异显著（P＜0.05）。
개전“신길부”라비어소화도지수이급위단백매화이단백매활성동태변화연구，결과표명，“신길부”라비어비장장위4.921±0.187，비장질량위0.018±0.002，비간질량위0.014±0.003，비내장질량위0.039±0.007，표현위편식식성위주적잡식성어류특정。공복재투위후0～96 h ，위단백매활성우12h 증가지최대치167.872 U ，투위12～96 h 기활성강저，특별시12～24 h ，감소폭도교대。동시검측기간장、전장、중장、후장중이단백매활성동태변화정황，각조직적이단백매활성비교，간＜중장＜전장＜후장，각부위적이단백매활성총체정선증가체최대치후，재감소적추세，각부위이단백매활성차이현저（P＜0.05）。
Digestive tube index and the activity distribution of pepsin and trypsin In NEW GIFT Tilapia (Oreochromis niloticus) were studied . It was found that Oreochromis niloticus had intestinal length (IL ) /total length ( TL ) of 4.921 ± 0.187 , intestinal weight ( IW ) /body weight (BW ) of 0.018 ± 0.002 , and hepatopancreas weight (HW ) /BW of 0.014 ± 0.003 , splanchnic weight (SW ) /BW of 0.039 ± 0.007 . The result showed that Oreochromis niloticus was a kind of heterophagous fish with partial phytophagy food habit .After starvation and refeeding , Pepsin activity increased to a maximum of 167.872 U at 12h .However ,it reduced from 12h to 96h ;especially 12h to 24h ,the decrease rate was significant .Trypsin activities of hepatopancreas ,foregut , midgut and hindgut were tested .The specific activity of trypsin in four organs was in the order of hepatopancreas <midgut < foregut < hindgut .The Trypsin activities in four parts increased up to a maximum during the first stage , then decreased smoothly .trypsin activity of each tissues was significant difference (P< 0.05) .