Atelopus oxyrhynchus is a species of toad in the Bufonidae family. It is endemic to Venezuela. Its natural habitats are subtropical or tropical moist montane forests, rivers, and intermittent rivers. It is threatened by habitat loss. Atelopus oxyrhynchus contains tetrodotoxin (TTX), a potent neurotoxin that induces muscle paralysis and/or death. Unlike Atelopus varius, who does not retain TTX when raised in captivity and thus acquires TTX exogenously, Atelopus oxyrhynchus maintains its toxicity when raised in captivity. This has also been shown for the rough-skinned newt (Taricha granulosa). These organisms raise questions about the source of TTX, as the most supported hypothesis for TTX toxicity in other animals is an exogenous origin, either through dietary uptake or bacterial symbiosis.
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| - Atelopus oxyrhynchus is a species of toad in the Bufonidae family. It is endemic to Venezuela. Its natural habitats are subtropical or tropical moist montane forests, rivers, and intermittent rivers. It is threatened by habitat loss. Atelopus oxyrhynchus contains tetrodotoxin (TTX), a potent neurotoxin that induces muscle paralysis and/or death. Unlike Atelopus varius, who does not retain TTX when raised in captivity and thus acquires TTX exogenously, Atelopus oxyrhynchus maintains its toxicity when raised in captivity. This has also been shown for the rough-skinned newt (Taricha granulosa). These organisms raise questions about the source of TTX, as the most supported hypothesis for TTX toxicity in other animals is an exogenous origin, either through dietary uptake or bacterial symbiosis.
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| - Atelopus oxyrhynchus is a species of toad in the Bufonidae family. It is endemic to Venezuela. Its natural habitats are subtropical or tropical moist montane forests, rivers, and intermittent rivers. It is threatened by habitat loss. Atelopus oxyrhynchus contains tetrodotoxin (TTX), a potent neurotoxin that induces muscle paralysis and/or death. Unlike Atelopus varius, who does not retain TTX when raised in captivity and thus acquires TTX exogenously, Atelopus oxyrhynchus maintains its toxicity when raised in captivity. This has also been shown for the rough-skinned newt (Taricha granulosa). These organisms raise questions about the source of TTX, as the most supported hypothesis for TTX toxicity in other animals is an exogenous origin, either through dietary uptake or bacterial symbiosis.
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