학술논문
한국 제주도 주변해역에 서식하는 갈치(Trichiurus japonicus)의 산란 생태
Maturation and Spawning of Largehead Hairtail Trichiurus japonicus Near Jeju Island, Korea
Maturation and Spawning of Largehead Hairtail Trichiurus japonicus Near Jeju Island, Korea
Document Type
Article
Author
Source
한국수산과학회지 / Korean Journal of Fisheries and Aquatic Sciences. Feb 28, 2020 53(1):1
Subject
Language
Korean
ISSN
0374-8111
Abstract
The reproductive biology of largehead hairtail Trichiurus japonicus, from near Jeju Island, Korea was investigated based on 4,384 individuals collected by commercial vessel from November 2016 to October 2019. There were more female specimens than male specimens (2.64:1). T. japonicus preanal lengths (PL) ranged from 10.5 to 53.5 cm; the relationships between PL and body weight (BW) were BW=0.0103PL3.1293 for females and BW=0.0106PL3.1251 for males. Monthly changes in gonadosomatic index were analyzed to estimate spawning season. The spawning period ranged from June to November. The size-frequency distribution of eggs suggested that T. japonicus exhibits multiple-spawning during a spawning period. The minimum size of females at maturity was 18.2 cm, while the size at sexual maturity was 25.0 cm.