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http://dx.doi.org/10.5657/KFAS.2021.1000

Maturation and Spawning of the Common Octopus Octopus vulgaris in the Coastal Waters of Yeosu, Korea  

Yang, Hye-Jin (Department of Marine Biology and Aquaculture/Department of Aquaculture Science / Institute of Marine Industry, College of Marine Science, Gyeongsang National University)
Jin, Suyeon (Department of Marine Biology and Aquaculture/Department of Aquaculture Science / Institute of Marine Industry, College of Marine Science, Gyeongsang National University)
Kim, Do-Gyun (Department of Marine Biology and Aquaculture/Department of Aquaculture Science / Institute of Marine Industry, College of Marine Science, Gyeongsang National University)
Kim, Heeyong (South Sea Fisheries Research Institute, National Institute of Fisheries Science)
Moon, Seong Yong (South Sea Fisheries Research Institute, National Institute of Fisheries Science)
Baeck, Gun Wook (Department of Marine Biology and Aquaculture/Department of Aquaculture Science / Institute of Marine Industry, College of Marine Science, Gyeongsang National University)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.54, no.6, 2021 , pp. 1000-1006 More about this Journal
Abstract
The maturity and spawning of the common octopus Octopus vulgaris were studied using 317 samples collected monthly from January to December of 2020 from the coastal waters of Yeosu, Korea. The mantle length (ML) of O. vulgaris ranged from 5.1 to 19.7 cm and body weight (BW) ranged from 117.6 to 3,645.4 g. We analyzed monthly changes in sex ratio, gonadosomatic index (GSI), histological maturity stage, and body weight at 50%, 75% and 97.5% group maturity. The sex ratio was 1:1.02, which was not significantly different from the value that expected. Based on histological observation of the gonad development and gonadosomatic index, the spawning periods lasted throughout the year, with peak spawning periods estimated from March to April and July to August. The percentages of sexually mature females estimated using a logistic equation were over 50% at 554.46 g BW, 75% at 1,134.38 g BW and 97.5% at 2,474.22 g BW respectively.
Keywords
Cephalopoda; Common octopus; Maturity; Spawning;
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