Abstract: Muscular fatty acid composition and feeding habits were investigated in rock cod Patagonotothen ramsayi as an ecologically important and most abundant sub-Antarctic fish species in the family Notothenioidei in the southwestern Atlantic Ocean using fatty acid biomarker analysis to understand the trophic dynamics and ecological function of the rock cod.The results showed that 16 fatty acids were detected in the muscle,higher in C16:0,C18∶1n9, C20∶5n3(EPA)and C22∶6n3(DHA).There was significantly higher content of DHA than EPA(P＜0.05).The significant relationship between content of several types of specific fatty acids and the body length was found,and the contents of saturated fatty acids,polyunsaturated fatty acids and 7 types of fatty acids showed significantly negative correlation with body length(P＜0.05).The ratio of DHA/EPA,which implied the trophic level of food items, however,showed significantly positive correlation with body lengths(P＜0.05).The specific fatty acid analysis revealed that the rock cod primarily fed on planktons and benthos,with carnivorous habit transformation with growth.
杨清源, 王少琴, 朱国平, 宋旗. 西南大西洋拉氏南美南极鱼脂肪酸组成及其食性研究[J]. 大连海洋大学学报, 2017, 32(1): 86-92.
YANG Qing-yuan, WANG Shao-qin, ZHU Guo-ping, SONG Qi. Fatty acid composition and feeding habit of rock cod Patagonotothen ramsayi in southwestern Atlantic Ocean. Journal of Dalian Ocean University, 2017, 32(1): 86-92.
2017, Vol. 32 
