Biodiversity
The world demand for frogs has severely depleted some wild populations of amphibians, including the edible frog Pelophylax kl. esculentus in Europe and the Chinese edible frog Hoplobatrachus rugulosus (Gratwicke et al., 2010). Frog farming is notoriously difficult: Indonesia, who has developed frog farms in the past, has reverted since the mid-2000s to wild harvesting (Kusrini et al., 2006). Due to the lack of reliable data, it is difficult to say whether large scale frog harvesting is sustainable, but it is certainly a matter of concern. Hoplobatrachus tigerinus, a farmed species, is already in the CITES listings and other species are under consideration (Gratwicke et al., 2010; Warkentin et al., 2009). On the other hand, the American bullfrog (Lithobates catesbeianus), which has been promoted as a farmed species in Asia, is now considered to be a major pest outside its native range (GISD, 2012).
Waste management
While information is lacking, it is clear that the waste management of frog processing is a problem. For instance, 1000 t of frogs are processed annually in Adana (Turkey) yielding about 500-700 t of fresh waste (Tokur et al., 2008). In that regard, using this waste for livestock feeding could be a welcome solution.