Otolith morphology of Antarctic lanternfish Electron antarctic in the South Shetland Islands,Antarctic
LI Shi-min,ZHU Guo-ping
1.College of Marine Seienees, Shanghai Oeean University, Shanghai 201306, China; 2. National Engineering Researeh Center for Oceanic Fisheries, Shanghai 201306, China ; 3. Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resourees, Ministry of Edueation, Shanghai 201306, China; 4. Collaborative Innovation Center for National Distant-water Fisheries, Shanghai 201306, China
Abstract: The morphometrical parameters including length,weight,length of antirostrum,length of rostrum,circumference and acreage of 100 sagittal otoliths were measured and analyzed in Antarctic lanternfish Electrona antarctica samples with standard length from 72.67 mm to 91.81 mm collected from the South Shetland Islands from December 2012 to February in 2013 by methods of regression analysis,Akaike information criterion（AIC） fitting model test and t test.The results showed that the relationship between the standard length and wet body weight was expressed as WW= 2.5086 × 10-5LS2.8586（R2= 0.7187,P 〈 0.05）.Responding to body length,the lanternfish has large otolith,whose length was close to the width of otolith in size.The otolith has clear excisural notch and the sulcus,and the rostrum and the antirostrum are almost the same in length,although they are not obvious.The length of otolith was ranged from 3.00 mm to 3.81 mm in the left and from 2.99 mm to 3.72 mm in the right and the width of the otolith was varied from 2.98 mm to 3.62 mm in the left and from 3.05 mm to 3.67 mm in the right.The width and circumference of otolith showed stable variation with the growth of fish,however,the variation in rostrum and the antirostrum of otolith were remarkable varies for all otolith morphological parameters.A significant difference in the length of antirostrum and circumference of the otolith was found between the left and the right,but unremarkable differences in total length and acreage.The close relationship was found between the standard length of fish and the length,the width,the area,and the perimeter of the otolith.There was a linear relationship between the standard length and body weight of the lanternfish and circumference and acreage of otolith.The most stable acreage of the otolith showed a higher relationship with the standard length of the fish,with more stable growth of total length in the otolith than that of width in otolith.The findings provide the essential data with the study of age and growth of Ele
李史民, 朱国平. 南极南设得兰群岛南极电灯鱼耳石形态学研究[J]. 大连海洋大学学报, 2015, 30(6): 674-680.
LI Shi-min, ZHU Guo-ping. Otolith morphology of Antarctic lanternfish Electron antarctic in the South Shetland Islands,Antarctic. Journal of Dalian Ocean University, 2015, 30(6): 674-680.
2015, Vol. 30 
