Table 1. Venom yielded per snake [mean volume (mL) ± standard variation], according to the management and year of maintenance.

	Period	Crotalus durissus	Bothrops jararaca
Venom yielded/snake in the outdoor serpentarium	1908-1962	0.18 mL*	0.10 mL*
Venom yielded/snake in the indoor serpentarium	1963-1968	0.26 mL*	0.20 mL*
	2000-2004	0.30 mL*	0.27 mL*
	2005-2019	0.45 ± 0.11mL	0.46 ± 0.18 mL
Venom yielded/recently wild-caught snake in the screening room	2005-2019	0.19 ± 0.07 mL	0.20 ± 0.09 mL

* In these periods, our database has only the mean value of venom extracted/animal.