What do studbook data reveal about the effects of climate on neonatal survival and seasonality in births?

A previous study of the zoo population of Himalayan red pandas (Ailurus (f.) fulgens) showed that neonatal survival was compromised by warmer temperatures. Climate change could potentially threaten wild and zoo populations of both red panda (sub)species. In this chapter, I reevaluate the previous findings by using daily temperature and precipitation data and extend the analysis to include Chinese red pandas (A. (f.) styani). The potential of red pandas to adapt to changing environmental conditions is explored through seasonality analysis to detect reproductive cues, and quantitative genetics assessing the heritability of implantation date. Results of analyses confirm that neonatal survival in Himalayan red pandas is compromised by higher environmental temperatures, but that regional differences exist and effects can be mitigated by husbandry. All red pandas are strongly seasonal, with photoperiod acting as a major cue in termination of embryonic diapause. Heritability of implantation date in zoo populations is low.