Animals 4 Cichlasoma 4 Cichlasoma dimerus 4 Cichlid fish 4 Cichlidae 4 Cichlids 4 Female 4 Gene Expression Regulation 4 Liver 4 Male 4 Octylphenol 4 Perciformes 4 Phenols 4 Vitellogenins 4 alkylphenol 4 animal experiment 4 animal tissue 4 article 4 cichlid 4 controlled study 4 endocrine disruptor 4 female 4 gene expression 4 histopathology 4 liver 4 liver cell 4 male 4 messenger RNA 4 nonhuman 4 nucleotide sequence 4