Abstract：From Dec. 2008 to Feb. 2009,we collected samples of 18 major winter food species and of 13 lesser-used food species of Francois’langur at Mayanghe Nature Reserve. We determined the water,crude protein,crude fiber,and acid detergent fiber (ADF),and calculated the ratio of crude protein and acid detergent (PROT/ ADF)of each sample,and tested the correlation between nutritional data and winter feeding proportion of each sample via Spearman Correlation Rank. Results showed that,except the PROT/ ADF ratio,there were no significant differences between the major and lesser-used species in nutritional contents. Further,there were no significant correlations between the winter feeding proportions of the 18 staple species and their corresponding nutritional contents,suggesting that the food species choice of the langurs in winter was not influenced by the content of water,crude protein,crude fiber,ADF and PROT/ ADF. Except for the content of water,there were no significant differences between food components in other measured components,and no significant correlations between winter feeding record and corresponding nutritional contents of each component,indicating that the choice of food components in winter was also not influenced by the content of water,crude protein,crude fiber,ADF and PROT/ADF.
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