a3b5f443-7465-4021-addc-7636b915dbf020230118051731361wseas:wseasmdt@crossref.orgMDT DepositWSEAS TRANSACTIONS ON SYSTEMS2224-26781109-277710.37394/23202http://wseas.org/wseas/cms.action?id=40671620221620222110.37394/23202.2022.21https://wseas.com/journals/systems/2022.phpNormaMuhtarDepartment of Mathematics, FMIPA, Universitas Halu Oleo, INDONESIAEdiCahyonoDepartment of Mathematics, FMIPA, Universitas Halu Oleo, INDONESIAR. MarsukiIswandiDepartment of Agriculture, Graduate Program, Universitas Halu Oleo, INDONESIAMuhidinMuhidinDepartment of Agriculture, Graduate Program, Universitas Halu Oleo, INDONESIAA closed interaction of predator prey is considered. The interaction is expressed in the Lotka-Volterra model. Two types of Lotka-Volterra models are considered, with and without carrying capacity of the prey. The paper includes a periodic harvesting of predator and/or prey, a function of time which acts to the model. 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