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Title: Morphological differentiation among cultured and wild Clarias macrocephalus, C. macrocephalus x C. gariepinus hybrids, and their parental species in the Mekong delta, Viet Nam
Authors: Dương, Thúy Yên
Phạm, Thanh Liêm
Nguyen, Thanh Tuan
Keywords: Morphology
Bighead catfish
Hybrid identification
Issue Date: 2017
Series/Report no.: International Journal of Fisheries and Aquatic Studies;5 .- p.233-240 
Abstract: Morphological differences among two cultured and three wild bighead catfish (Clarias macrocephalus) populations, and introduced North African catfish (Clarias gariepinus) and hybrids (C. macrocephalus x C. gariepinus) collected in the Mekong Delta, Viet Nam, were assessed using five meristic and 21 morphometric measurements. Wild and cultured C. macrocephalus differed significantly at 19 of 21 morphometric traits (P C. macrocephalus differed from C. gariepinus and hybrids in the number of gill rakers on the first branchial arch and for all morphometric traits (PC. macrocephalus and the shape of the occipital process similar to C. gariepinus. Discriminant analysis correctly classified 97.5 and 99.0% individuals as cultured and wild C. macrocephalus, 80.0% as C. gariepinus, and their hybrids with 95.7% confidence. Misclassifications were found between cultured and wild bighead catfish, and between C. gariepinus and hybrids. Results from this study can be used to distinguish F1 hybrid and cultured bighead catfish from wild individuals.
ISSN: 2347-5129
Appears in Collections:Tạp chí quốc tế

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