CAJ | 학술논문

根据2014年10月对南海北部陆坡海域进行中层鱼拖网调查所获得的金鼻眶灯鱼（ Diaphus chrysorhynchus）样本，采用胃含物分析方法，对其食物组成、摄食强度、食物多样性、摄食习性随体长的变化和营养级等进行了初步研究。结果表明，金鼻眶灯鱼属浮游动物食性，以浮游甲壳动物（桡足类、磷虾类等）为主要摄食对象，其中桡足类为绝对优势饵料生物类群，其相对重要性指数百分比（%IRI ）、个数百分比（ N%）、质量百分比（ W%）和出现频率（ F%）分别为74.00、85.64、18.39和100.00。金鼻眶灯鱼摄食等级较高，摄食率为100%，胃饱满指数平均为2.68%。不同体长组所摄食的饵料生物类群基本相同，没有发生明显改变，体长达60 mm后大个体种类摄食比重加大，有可能出现食性转变现象。金鼻眶灯鱼的营养级为3.49级，属第三营养级的低级肉食性动物。
근거2014년10월대남해북부륙파해역진행중층어타망조사소획득적금비광등어（ Diaphus chrysorhynchus）양본，채용위함물분석방법，대기식물조성、섭식강도、식물다양성、섭식습성수체장적변화화영양급등진행료초보연구。결과표명，금비광등어속부유동물식성，이부유갑각동물（뇨족류、린하류등）위주요섭식대상，기중뇨족류위절대우세이료생물류군，기상대중요성지수백분비（%IRI ）、개수백분비（ N%）、질량백분비（ W%）화출현빈솔（ F%）분별위74.00、85.64、18.39화100.00。금비광등어섭식등급교고，섭식솔위100%，위포만지수평균위2.68%。불동체장조소섭식적이료생물류군기본상동，몰유발생명현개변，체장체60 mm후대개체충류섭식비중가대，유가능출현식성전변현상。금비광등어적영양급위3.49급，속제삼영양급적저급육식성동물。
Based on the samples collected by a mid-water trawl in the epipelagic zone of continental slope region in northern South Chi-na Sea in October,2014,we examined the diet composition,feeding intensity,diversity index,ontogenetic feeding habit shifts and trophic level of Diaphus chrysorhynchus by traditional stomach content analysis. The results show that D. chrysorhynchus from the conti-nental slope region in the South China Sea were classified as a zooplankton carnivorous predator,with planktonic crustaceans( copepo-da,euphausiacea,etc. )as the main prey groups. Among the crustaceans,copepoda was the most dominant prey group,and the relative importance index percent(% IRI),individual percentage,quality percentage and occurrence percentage were 74. 00, 85. 64,18. 39 and 100. 00,respectively. The feeding intensity of D. chrysorhynchus was high with a total feeding rate of 100%. The average percentage of stomach fullness index was 2. 68%. There was no significant difference in preys among different standard-length groups. The standard length(60 mm)was the turning point of diet,and the bigger prey groups in diets increased for fish body lengths longer than 60 mm. The trophic level of D. chrysorhynchus was 3. 49,which indicates that this species belongs to third-grade and lower carnivore animals.