Morphological differentiation among cultured and wild Clarias macrocephalus, C. macrocephalus x C. gariepinus hybrids, and their parental species in the Mekong delta, Viet Nam

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