Breeding of the Kentish Plover Charadrius Alexandrinus in Captivity

27 Mar Breeding of the Kentish Plover Charadrius Alexandrinus in Captivity

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Abstract

1972年～75年の3年間,人工ふ化によるシロチドリの1年間飼育を3回試み,3回目に禽舎内で産卵,抱卵,ふ化,育雛と一連の行動を伴う繁殖に成功した. 5月4日から構巣を始め,同6日～12日交尾,同15日,17日,19日の隔日に1個ずつ3卵を産み,抱卵につき,6月16日3雛がふ化した. 卵はそれぞれ8g,7.5g,7.5gで野外の9gに比べて小さく軽かった.抱卵日数も28日で,野外の25日に比べて3日も長くかかっている.

English Abstract

From 1972 to 1975, for a full three years, the author raised the Kentish Plover Charadrius alexandrinus for artificial incubation. One-year old Kentish Plovers hatched in an incubator and kept in captivity laid their eggs. One pair was formed and they had one brood and raised two youngs. From May 4, they began to build a nest, copulated from May 6 to May 12, laid an egg every other day, May 15, May 17, and May 19, hatched three youngs to June lb. Egg weight is each 8, 7.5 and 7.5g. The eggs are small and light as compared with the field case. It is 28 days from sitting on their eggs to hatching. It is 3 days too long compared with 25 days in the wild case.