Endocrinology

Abstract

One of major topics in endocrinology continues to be environmental adaptation, and teleost fishes have been the subject of intensive research. Teleost fish have experienced in their evolution an additional third-round whole genome duplication just after the divergence of their lineage, which endowed them with an extra adaptability to invade various aquatic habitats from fresh water to the deep-sea floor. Thus, their endocrine system for environmental adaptation is also diverse. Here, we introduce the marine teleost as a model to study experiments on the adaptation, particularly body fluid regulation by dipsogenic hormones (e.g., angiotensin II) and hypocalcemic hormones (e.g., calcitonin, stanniocalcin) and body color regulation by melanin-concentrating hormone, melanocyte-stimulating hormone, and melatonin.