CAJ | 학술논문

应用稳定同位素方法测定广东硇洲岛海域的金线鱼（Nemipterus virgatus）鱼肉、鱼鳃、内脏团和鱼鳞的稳定氮同位素，并计算出营养级。结果表明，在规格较一致的情况下，金线鱼各部位δ15N值范围为10.09‰～14.07‰，其中，鱼肉δ15N值范围为11.56‰~14.07‰，差值达2.51‰，平均为12.84‰；鱼鳃δ15N值范围10.41‰~12.10‰，差值达1.69‰，平均为11.41‰；内脏团δ15N值范围10.09‰~11.98‰，差值达1.89‰，平均为11.08‰；鱼鳞δ15N值范围10.10‰~11.35‰，差值达1.25‰，平均为10.66‰。鱼肉、鱼鳃、内脏团、鱼鳞的δ15N值大小依次为：鱼肉、鱼鳃、内脏团、鱼鳞。由δ15N值推算出来金线鱼的营养级范围为2.46～3.12，平均值为2.80，符合其主要摄食浮游和底栖动物的食性。
응용은정동위소방법측정엄동뇨주도해역적금선어（Nemipterus virgatus）어육、어새、내장단화어린적은정담동위소，병계산출영양급。결과표명，재규격교일치적정황하，금선어각부위δ15N치범위위10.09‰～14.07‰，기중，어육δ15N치범위위11.56‰~14.07‰，차치체2.51‰，평균위12.84‰；어새δ15N치범위10.41‰~12.10‰，차치체1.69‰，평균위11.41‰；내장단δ15N치범위10.09‰~11.98‰，차치체1.89‰，평균위11.08‰；어린δ15N치범위10.10‰~11.35‰，차치체1.25‰，평균위10.66‰。어육、어새、내장단、어린적δ15N치대소의차위：어육、어새、내장단、어린。유δ15N치추산출래금선어적영양급범위위2.46～3.12，평균치위2.80，부합기주요섭식부유화저서동물적식성。
To study Sardinella clupeoides in Naozhou Bay by stable isotope analysis method, 10 fishes were sampled and analyzed to know their stable isotope values and trophic levels. The muscle, gills, visceral mass and scale of Sardinella clupeoides were tested by Stable Isotope Ratio Mass Spectrograph. The results showed that their δ15N values were 10.09‰ - 14.07‰ and the span was 3.98‰, and δ15N values of the muscle, gills, visceral mass and scale were 11.56‰-14.07‰, 10.41‰-12.10‰, 10.09‰-11.98‰, 10.10‰ - 11.35‰, respectively. The averaged δ15N values of these 4 tissues were 12.84‰, 11.41‰, 11.08‰, 10.66‰which lined as follows, muscle>gills>visceral mass>scale. Trophic levels were calculated byδ15N values of the muscle. The results show that the trophic level, with the average level of 2.80, ranges from 2.46 to 3.12 which match with their feeding habit of phytoplankton and benthic animals.