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Hu B.-W.,Xinjiang Institute of Ecology and Geography | Hu B.-W.,University of Chinese Academy of Sciences | Ma M.,Xinjiang Institute of Ecology and Geography | Reheman A.,Administrative Bureau of the National Nature Reserve in the Ebinur Wetland | And 5 more authors.
Chinese Journal of Ecology | Year: 2010

From March to October 2009, an investigation was made on the characteristics of nests and eggs as well as the nestling growth pattern of Egretta alba alba in Ebinur (Aibi Lake) of Xinjiang. The thickness of E. alba alba nest fundus was greater than nest depth (t = 6. 06, P< 0. 01), and the outside diameter of the nests was greater than inside diameter (t = 21. 53, P< 0. 01), which guaranteed the nest stability and reduced the probability of nestling falling off the nests. The clutch size was 3-5 eggs (3. 86±0. 69), with the egg weight and cubage being 44. 00-60. 00 (53. 94 ±3. 96) g and 47. 18-62. 00 (55. 19 ±4. 09) cm3, respectively. Two parent birds were responsible for the incubation (26-28 d) and parents care (55-60 d). Gompertz equation was used to fit the 26-day-old growth pattern of 13 nestlings in 4 nests, which showed that the nestling growth could be divided into three phases. First, the organs of nestling came into being and the growth rate was going to increase. Second, as a phase of matter accumulation, the growth rate had a great increase and gradually transited to mid-rate. Third, matter consumption gradually exceeded matter accumulation, and young birds began to fly.

Ma M.,Xinjiang Institute of Ecology and Geography | Chen Y.,Xinjiang Institute of Ecology and Geography | Bayahen K.,Administrative Bureau of the National Nature Reserve in the Ebinur Wetland | Hu B.,Xinjiang Institute of Ecology and Geography | And 4 more authors.
Journal of Arid Land | Year: 2010

The Relict Gull (Larus relictus) is recognized as a vulnerable species, with a worldwide population of about 6,000 individuals. Always inhabiting the extreme arid regions of Central Asia, their migratory routes and winter grounds are unclear. This research focused on distribution sites, habitat, behavior, population size and seasonal changes of Relict Gull. Line transects and point counts in every month were used to investigate the gulls around the Ebinur Lake. The result showed Relict Gull was summer visitor to Xinjiang, Western China. Population curve with a single peak was obtained. This gull appeared in early April and was 63 individuals (1% of the global population). The number remained stable from May to July in 2009. The discovery of fledglings indicates that Relict Gull may breed here. They left Ebinur Lake in August. Relict Gull in Ebinur Lake should belong to the Central Asian subpopulation, which was the most westerly record in China.

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