Timing of a Single Daily Meal Affects Daily Serum Prolactin Rhythm in Gulf Killifish, Fundulus grandis
Fish fed at one of two different times of day had differences in mean levels of serum prolactin throughout the day. Although the forms of the daily rhythms from the two groups were similar, they differed at one time of day.
Richard E. Spieler, Albert H. Meier, and Teresa A. Noeske. 1978. Timing of a Single Daily Meal Affects Daily Serum Prolactin Rhythm in Gulf Killifish, Fundulus grandis .Life Sciences , (3) : 255 -258. https://nsuworks.nova.edu/occ_facarticles/202.