Determination of the growth performance and reproductive season of wild Channa lucius (Cuvier, 1831) populations of genus Channa (Channidae, Perciformes) in the Mekong Delta, Vietnam

This study aimed to investigate the growth and spawning characteristics of wild Channa lucius (Cuvier, 1831) populations in the Mekong Delta, Vietnam. The study was carried out from March 2011 to February 2012. The length–weight relationship of C. lucius was determined according to the equations W =...

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Bibliographic Details
Published in:Journal of fish biology 2023-12, Vol.103 (6), p.1392-1400
Main Authors: Ly, Tien H., Huang, Cheng‐Ting, Lee, Meng‐Chou, Thanh, Vo V., Diep, Doan X.
Format: Article
Language:English
Subjects:
Allometry
Animals
Channa
Channa lucius
Condition factor
Female
Females
first maturity
Fish
Fishes
Gonadosomatic index
Length-weight relationships
length–weight relationship
Male
Males
Marine fishes
Maturity
Perciformes
Populations
relative condition factor
Reproduction
Seasons
Sexual maturity
Spawning
Spawning seasons
Vietnam
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Summary:This study aimed to investigate the growth and spawning characteristics of wild Channa lucius (Cuvier, 1831) populations in the Mekong Delta, Vietnam. The study was carried out from March 2011 to February 2012. The length–weight relationship of C. lucius was determined according to the equations W = 0.0044L3.2494, R2 = 0.9157 (female fish) and W = 0.0047L3.2178, R2 = 0.9434 (male fish). The length and weight of the body for female fish ranged from 16.3 to 36.0 cm and 49.0 to 550.0 g, and for male fish, from 14.6 to 38.2 cm and 46.0 to 639.0 g, respectively. Female and male fish had almost similar lengths at first maturity (21.3958 cm for females and 21.3952 cm for males). The condition factor of female fish ranged from 0.842 to 0.864 and for male fish ranged from 0.848 to 0.874. The gonadosomatic index of female fish was highest in June (1.68%) and lowest in November (0.69%); that of male fish was highest in June (0.53%) and lowest in September (0.15%). The sexual maturity rate (SMR) of female fish peaked in May, with SMRs of 33.3% (stage III) and 58.3% (stage IV). In conclusion, C. lucius has a positive allometric range (b > 3), reaching sexual maturity when its length reaches 21.39 cm for both sexes, and the spawning season begins in December but peaks in May and June.
ISSN:0022-1112
1095-8649
DOI:10.1111/jfb.15330