河南董寨鸟类自然保护区白鹭繁殖生态的研究  

ECOLOGICAL STUDY ON THE BREEDING HABITS OF LITTLE EGRET

作　　者：张龙胜[1] 刘作模 

机构地区：[1]山西大学生物系

出　　处：《山西大学学报（自然科学版）》1991年第2期202-208,共7页Journal of Shanxi University(Natural Science Edition)

摘　　要：该文作者对白鹭在河南董寨鸟类自然保护区的繁殖生态进行了较详细观察,并对雏鸟生长发育、食性及造成雏鸟死亡的原因进行了分析。结果表明:白鹭在该地区4月底6月初开始产卵,孵卵期22天左右,出雏率88.8％,离巢率91.5％。幼鸟主要以泥鳅和小鱼为食,此外还有少量蛙类、昆虫、小虾、黄鳝和蜻蜒。造成雏鸟死亡的主要因素是恶劣的天气和出壳时间的较大相隔致使同巢晚出壳的雏鸟争不到足够的食物而死亡。From March to June, 1988, the authors studied the breeding habits and the course of growth of Little Egret (Egretta garzetta Linnaeus) in Dongzhai Nature Protected Area of Bird, Henan Province. The results show that the earliest inmigration of the birds occurs in late March with the sex ration 1: 1. Their nests are built in Chinese fir forest. The nests are desh—shaped, 30—40cm outside, 18—25cm inside, 10—18cm in height and 4—7cm in deph. The nests are built 5 to7M or 9M above the land. A cluth consists of 3—6 eggs, each measuring 44.3mm (40.0—48.8) x 32.3mm (29.3—42.4), and weighing 23.2g (20.0—29.5). The average incubation lasts 22 days the survival rate among 6 nests is 88.8%.In the breeding season, they have two peak stage of movement a day, one from 6—11 A.m, and the other from 14—20 P. m,The period of young birds in nests are 20 days with the body growing fast during 1—9 days. The birds mainly feed on loach, little wild fishes, some hydrobiotic insects, shrimp and young frogs.

关 键 词：白鹭 繁殖 生态 生长 

分 类 号：Q959.722[生物学—动物学]