Gómez Jaime, Gil-Delgado José A, Monrós Juan S
Instituto Cavanilles de Biodiversidad y Biología Evolutiva, Universidad de Valencia, Apdo. Oficial 2085, E-46071 Valencia, Spain.
Rev Biol Trop. 2006 Dec;54(4):1131-4.
The breeding success of a double-brooding colony of Boat-billed Herons Cochlearius cochlearius was studied in pasturelands of Costa Rica. Mean clutch size in the first clutches (2.9 eggs/nest) was higher than in second and repeat clutches (2.3 eggs/nest). Breeding success was similar in the first attempt and second attempts (20.7% and 21.7%, respectively). In both attempts earlier nests enjoyed a higher breeding success. Starvation of the youngest chicks within the nest and destruction of nests by bad weather conditions were the main factors related to nestling death. No effects of human activity on the reproduction of the breeding colony were observed.
在哥斯达黎加的牧场对双角夜鹭（Cochlearius cochlearius）的一个双窝繁殖群体的繁殖成功率进行了研究。第一窝的平均窝卵数（2.9枚/巢）高于第二窝和重复窝（2.3枚/巢）。首次繁殖尝试和第二次繁殖尝试的繁殖成功率相似（分别为20.7%和21.7%）。在这两次尝试中，较早筑的巢繁殖成功率更高。巢内最年幼雏鸟的饥饿以及恶劣天气条件对巢的破坏是与雏鸟死亡相关的主要因素。未观察到人类活动对繁殖群体繁殖的影响。
