印度泰米尔那德邦Karaivetti鸟类保护区斑嘴鹈鹕的繁殖生态

于2007年9月至2010年9月在印度泰米尔那德邦Karaivetti湖研究了斑嘴鹈鹕(Pelecanus philippensis)的繁殖生物学.斑嘴鹈鹕于1 1月至次年4月在Karaivetti湖进行繁殖,此外,在该邦维旦汉加尔(Vedanthangal)和卡里吉利(Karikili)两个鸟类保护区以外的地区也有繁...

Breeding biology of the Spot-billed Pelican (Pelecanus philippensis) in Karaivetti Bird Sanctuary, Tamil Nadu, India

The breeding biology of the Spot-billed Pelican (Pelecanus philippensis) was investigated from September 2007 to September 2010 in Karaivetti Lake,Tamil Nadu,India.The Spot-billed Pelican breeds between November and April at the Karaivetti Lake.It also breeds roughly during the same period at other breeding sites in Tamil Nadu,except for the Vedanthangal and Karikili bird sanctuaries,where pelicans arrives much earlier and their breeding activities start and end to some extent ahead of the other sites,i.e.,from September to March.In essence,the breeding season starts after the onset of the northeast monsoon in Tamil Nadu.A few days after their arrival,pelicans perform courtship display,form pairs,start nest construction and lay eggs.Courtship display is not as attractive and impressive as in other waterbirds.The clutch size varies from two to three eggs and the incubation period from 25 to 36 days.The fledging period varies from a minimum of 90 to a maximum of 102 days.The nest success rate of the Spot-billed Pelican at Karaivetti was 90.28％ during the study period.