Animals 2 Cichlasoma 2 Cichlidae 2 Cichlids 2 Egg Proteins 2 Estradiol 2 Female 2 Gene Expression Regulation 2 Gene expression 2 Male 2 Octylphenol 2 Phenols 2 Vitellogenin 2 Zona pellucida proteins 2 animal experiment 2 animal tissue 2 article 2 cichlid 2 controlled study 2 female 2 gene expression 2 histology 2 liver cell 2 male 2 nonhuman 2 nucleotide sequence octylphenol 2 priority journal 2 protein 2 protein expression 2