Volume 24 Issue 1
Jan.  2003
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ZHANG Ying-mei, ZHAO Dong-qin, RUAN Lu-zhang, DONG Yuan-hua, WANG Hui, FASOLA M. Pairing Age and Reproductive Success in Black crowned Night Herons at Tai Lake,China. Zoological Research, 2003, 24(1): 57-59.
Citation: ZHANG Ying-mei, ZHAO Dong-qin, RUAN Lu-zhang, DONG Yuan-hua, WANG Hui, FASOLA M. Pairing Age and Reproductive Success in Black crowned Night Herons at Tai Lake,China. Zoological Research, 2003, 24(1): 57-59.

Pairing Age and Reproductive Success in Black crowned Night Herons at Tai Lake,China

  • Received Date: 1900-01-01
  • Rev Recd Date: 1900-01-01
  • Publish Date: 2003-02-22
  • Data on pairing age and age-related reproductive success were collected in Night Herons Nycticorax nycticorax at Tai Lake area in a period from April to June,2001.Of 206 pairs nesting at positions easy to observe,2 pairs were 2-yr old and 4-yr old,39 pairs were "2Y+2Y",34 pairs were "3Y+3Y",and 131 were "4Y++4Y+"(6 abandoned in midcourses).Of the reproductive birds 2- and 3-yr old parents were 35.4%.In 200 nests producing fledglings,there were no differences of the egg volume and brood size in the three age-class parents,but the egg weight,clutch size,hatch rate and the survival rate increased with parents age.
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