Although the Amazonian Milk Frog (Trachycephalus resinifictrix) is commonly bred in captivity in ... more Although the Amazonian Milk Frog (Trachycephalus resinifictrix) is commonly bred in captivity in zoological institutions worldwide, very little information regarding these undertakings has been published. Here, I report my experience with the successful breeding of T. resinifictrix at the Touroparc Zoo. I highlight some fundamental biological traits in order to fulfill the requirements for captive breeding and to ensure the general welfare of these frogs. The aim is to provide guidelines that may be used by zoos, aquariums, and other facilities as well as private contributions to conservation breeding programs for endangered anurans with requirements similar to those of T. resinifictrix. In general, this species is easy to keep in captivity. Larvae are easy to produce and raise with very low mortality rates. They usually metamorphose at six to ten weeks. However, newly metamorphosed frogs are fragile and require more attention. Several pathogens are known to affect the health of amp...
The processes underlying macroecological gradients in body size are widely debated, in part becau... more The processes underlying macroecological gradients in body size are widely debated, in part because their intraspecific variability remains poorly described even in well-studied taxa such as vertebrates. In this study, we investigated how climate, habitat, genetic lineage and sex explain body size variations in French populations of the European pond turtle (Emys orbicularis). We measured 7016 adult individuals captured in 41 populations, covering most of the species’ distribution in metropolitan France, including Corsica. Body size variation in our sample was wide and comparable to that found across the species’ worldwide range. Variation was similar in magnitude at regional and local levels, suggesting that body size is influenced by local factors as much as by regional factors such as climate or genetic lineage. Smaller sizes were associated with Mediterranean or altered oceanic climates, and with two lineages (E. o. galloitalica and E. o. galloitalica/E. o. orbicularis), while l...
Although the Amazonian Milk Frog (Trachycephalus resinifictrix) is commonly bred in captivity in ... more Although the Amazonian Milk Frog (Trachycephalus resinifictrix) is commonly bred in captivity in zoological institutions worldwide, very little information regarding these undertakings has been published. Here, I report my experience with the successful breeding of T. resinifictrix at the Touroparc Zoo. I highlight some fundamental biological traits in order to fulfill the requirements for captive breeding and to ensure the general welfare of these frogs. The aim is to provide guidelines that may be used by zoos, aquariums, and other facilities as well as private contributions to conservation breeding programs for endangered anurans with requirements similar to those of T. resinifictrix. In general, this species is easy to keep in captivity. Larvae are easy to produce and raise with very low mortality rates. They usually metamorphose at six to ten weeks. However, newly metamorphosed frogs are fragile and require more attention. Several pathogens are known to affect the health of amp...
The processes underlying macroecological gradients in body size are widely debated, in part becau... more The processes underlying macroecological gradients in body size are widely debated, in part because their intraspecific variability remains poorly described even in well-studied taxa such as vertebrates. In this study, we investigated how climate, habitat, genetic lineage and sex explain body size variations in French populations of the European pond turtle (Emys orbicularis). We measured 7016 adult individuals captured in 41 populations, covering most of the species’ distribution in metropolitan France, including Corsica. Body size variation in our sample was wide and comparable to that found across the species’ worldwide range. Variation was similar in magnitude at regional and local levels, suggesting that body size is influenced by local factors as much as by regional factors such as climate or genetic lineage. Smaller sizes were associated with Mediterranean or altered oceanic climates, and with two lineages (E. o. galloitalica and E. o. galloitalica/E. o. orbicularis), while l...
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Papers by Fabien MIGNET