Daily variations in the fattening response to prolactin in Fundulus grandis held on different photoperiods
- 1 September 1971
- journal article
- research article
- Published by Wiley in Journal of Experimental Zoology
- Vol. 178 (1) , 59-62
- https://doi.org/10.1002/jez.1401780109
Abstract
Gulf killifish were placed on three different photoperiods (8L:16D; 12L:12D; 16L:8D) and injected daily for six days with prolactin at one of several times during the day. Gains in fat stores resulted from prolactin injections given eight hours after the onset of light regardless of the length of the photoperiod. Prolactin injections at other times of the day did not stimulate fattening. These results suggest that the endogenous system controlling the daily fattening response to prolactin is phased by the onset of light.Keywords
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