Study on the diurnal activity rhythms of waterfowl in Fujian mountainous river basins based on camera trapping
We used infrared camera technology to investigate avifauna's distribution and daily activity pat-terns in the mountainous river ecosystems of Fujian,China.A total of 21 effective infrared cameras were deployed,yielding 2 217 independent effective photographs.The results showed that four natatores were identified in the river basins:Aix galericulata,Anas crecca,Anas zonorhyncha,and Tachybaptus ruficol-lis.The daily activity rhythm of A.galericulata exhibited an unimodal activity pattern with a noon peak,demonstrating significant seasonal and sexual differences.A.crecca and A.zonorhyncha displayed bimod-al rhythms,with peaks in the morning and afternoon.And T.ruficollis displayed a unimodal pattern,with its activity peak in the afternoon.Compared to other avifauna,A.galericulata exhibited significant differ-ences in daily activity patterns with A.crecca and A.zonorhyncha,but not with T.ruficollis.
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