Chinese Journal of Polar Research

ADVANCES IN POLAR SCIENCE ›› 2012, Vol. 24 ›› Issue (4): 346-351.DOI: 10.3724/SP.J.1084.2012.00346

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THE BIOLOGY OF ELECTRONA ANTARCTICA IN THE WESTERN SOUTH ORKNEY ISLANDS, ANTARCTIC

Zhu Guoping1, 2, 3, Li Fengying2, Feng Chunlei4, Wu Qiang5, Xu Pengxiang2, Xu Liuxiong1, 2, 3   

  1. 1National Distant-water Fisheries Engineering Research Center, Shanghai 201306, China; 2The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Shanghai Ocean University, Ministry of Education, Shanghai 201306, China; 3Scientific Observing and Experimental Station of Oceanic Fishery Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai, 201306, China; 4Key and Open Laboratory of Marine and Estuarine Fisheries of Ministry of Agriculture, East China Sea Fisheries Research Institute, Chinese Academy of Fisheries Science, Shanghai 200090, China; 5Fisheries Resource Division, Yellow Sea Fisheries Research Institute, Chinese Academy of Fisheries Science, Qingdao, 266071
  • Received:2011-06-15 Revised:2012-08-22 Online:2012-12-30 Published:2012-12-30
  • Contact: Guoping ZHU

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Abstract: Based on the biological data collected in the western South Orkney Islands, Antarctic in austral summer, 2010-2012, the present study analyzed the biological characteristics of Electron antarctic (Electrona antarctica), including standard length (TL), wet weight (WW), dressed weight (DW), the relationship between SL and DW, sexual maturity stage and gonadsomtic index. The results showed that: (1) The SL ranged from 6.3 to 8.8 cm and the average SL value is 7.51±0.03cm (95% confidence interval), the WW ranged from 3.46 to 10.13 g and the average WW is 5.96 ± 0.08 g, the DW ranged from 3.11 to 8.69 g and the average DW is 5.17 ± 0.07 g. (2) The relationship between WW and DW was DW=0.8497TW+0.1623 (R2=0.9502), and the relationship between SL and DW was FL=0.0238DW2.6695. (3) During the survey period, the sexual maturity stages of Electron antarctic were from stage I to IV and stage V and VI cannot be found. (4) The feeding intensity of Electron antarctic was increased with the increasing of SL, the proportion of empty stomach and stage I were decreased with the increasing of SL.

Key words: South Orkney Islands, Electron Antarctic, biological characteristics

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