Berkala Penelitian Hayati published by The East Java Biological Society (PBI Jawa Timur). As such, this journal follows the guidelines for conduct, reporting, editing, publishing on ethical publication and research. The Editorial Member should fair play, independence, confidential, disclosure on conflict of interest, involvement and coorperation in manuscript investigations. The Reviewers should contribute an editorial decisions, promptness, confidential, objectiveness, acknowledgement of sources and disclosure on conflict of interest. The Authors should reporting a standards, data access and retention, originality and plagiarism-free, not duplicating in publish to another journal, have an authorship, acknowlegement of sources, disclosure on conflict of interest, peer review, and have ethical clearance on hazard, human, or animal subjects.