January 9, 2014, Filed Under: 2014Copy number variation in the melanocortin 4 receptor gene and alternative reproductive tactics the swordtail Xiphophorus multilineatus Citation: Smith CC, Harris RM, Lampert KP, Schartl M, Hofmann HA, Ryan MJ. Copy number variation in the melanocortin 4 receptor gene and alternative reproductive tactics the swordtail Xiphophorus multilineatus. Environmental Biology of Fishes. 98 (1) :23 – 33. 2014.smith_.biofish.pdf