Age and Growth Characteristics of Okamejei kenojei in the West Sea of South Korea According to Coronal Vertebral Microstructure

In this study, the growth and age characteristics of Okamejei kenojei in the West Sea of South Korea were examined, and specimens were collected by bottom trawls from January to December 2019. The relationship between disc width (L) and body weight (W) was W = 6.1 × 10−3 L3.40. Age was determined by...

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Bibliographic Details
Published in:Fishes 2023-04, Vol.8 (4), p.197
Main Authors: Youn, Byoung-Il, Choi, Dong-Hyuk, Roh, Tae-Hyoung, Lee, Seung-Hwan, Han, Kyeong-Ho, Kwon, Dae-Hyeon, Kim, Maeng-Jin
Format: Article
Language:English
Subjects:
Age
Body weight
Bottom trawls
coronal vertebral
Females
Fish
Gonadosomatic index
growth
Growth models
Growth rings
Males
Microstructure
ocellate spot skate
Okamejei kenojei
Spawning
Vertebrae
West Korea Sea
Width
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Summary:In this study, the growth and age characteristics of Okamejei kenojei in the West Sea of South Korea were examined, and specimens were collected by bottom trawls from January to December 2019. The relationship between disc width (L) and body weight (W) was W = 6.1 × 10−3 L3.40. Age was determined by measuring annuli on the vertebral centrum surface, which forms around June every year. The spawning period was extrapolated from monthly changes of the gonadosomatic index in June–July. The relationship between the vertebral centrum radius and disc width, which was analyzed separately for females and males, was determined as L = 16.159R0.6145 and L = 15.543R0.6851, respectively. Finally, O. kenojei growth, that is, the disc width (L) at a certain age (t), was expressed using the von Bertalanffy growth equation as Lt = 58.70(1 − e−0.21(t+0.12)) for females and Lt = 53.94(1 − e−0.26(t+0.05)) for males. This study provides basic data on the age characteristics of O. kenojei for future research and more efficient fish stock management.
ISSN:2410-3888
2410-3888
DOI:10.3390/fishes8040197