Journal of the Korean Society of Fisheries and Ocean Technology (수산해양기술연구)

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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Maturity and spawning of the giant Pacific octopus, Octopus dofleini in the coast of Gangwondo, East Sea

강원도 연안 대문어의 성숙과 산란

  • Lee, Sung Il (National Fisheries Research and Development Institute) ;
  • Yang, Jae Hyeong (National Fisheries Research and Development Institute) ;
  • Lee, Hae Won (National Fisheries Research and Development Institute) ;
  • Kim, Jong Bin (National Fisheries Research and Development Institute) ;
  • Cha, Hyung Kee (National Fisheries Research and Development Institute)
  • Received : 2014.02.14
  • Accepted : 2014.04.23
  • Published : 2014.05.31
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Abstract

Maturity and spawning of the giant Pacific octopus, Octopus dofleini was investigated based on the samples collected in the coast of Gangwondo, East Sea, from January to December in 2009. Individuals of mature stage had a higher occurrence rate from February to May, and gonadosomatic index (GSI) also showed a higher value from February to May than the other months. For that reason, the spawning period was estimated from February to May with the main spawning period from March to May. The total number of eggs in the fecundity (F) ranged from 9,045 in 11.0 kg (TW) to 148,682 in 16.5 kg (TW), which was proportional to total weight (TW), and the relationship between total weight and fecundity was $F=0.185{\times}TW^{2.238}$ ($R^2=0.389$). The total weight at 50% group maturity (TW0.5) of female was estimated to be 12.2 kg.

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References

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