Characterizing the annual cycle of steroid hormones in males from an invasive vertebrate (Python bivittatus) of management concern.
Logo G, Sandfoss M, Claunch N, Currylow A, Bartoszek I
Invasive Species
Burmese pythons in the Everglades are eating their way through the same marsh birds, mammals, and reptiles that native plants depend on for seed dispersal and pollination — and understanding when these snakes are hormonally primed to breed is the first step toward disrupting that cycle.
Scientists measured hormones in wild Burmese pythons throughout the year to figure out when males are getting ready to mate. They found that the 'go-time' hormone spikes before breeding begins and then drops off, and that day length and temperature are what trigger that spike. This kind of information helps wildlife managers pick the best times to intervene and control this invasive species that is reshaping Florida's natural landscape.
Key Findings
Testosterone in male pythons peaks before the breeding season begins and declines to baseline levels during the non-breeding season.
Corticosterone (a stress hormone) showed no clear seasonal pattern but was more variable during the breeding season.
Photoperiod (day length) and ambient temperature were identified as the primary environmental drivers of male hormone cycles.
chevron_right Technical Summary
Researchers tracked testosterone and stress hormones across a full year in wild male Burmese pythons in South Florida, finding that testosterone peaks before breeding season and is driven by daylight length and temperature — insights that could help target invasive python control efforts.
Abstract Preview
South Florida's subtropical climate has facilitated the establishment of numerous invasive species, including the Burmese python (Python bivittatus). Despite decades of efforts to manage the invasi...
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