Facteurs influençant le nourrissage des oisillons et son observation en forêt boréale

Authors: Hachey, Marie-Hélène
Advisor: Desrochers, André
Abstract: Estimating the nesting success of forest birds is essential to understand their population dynamics and their response to forestry practices. Indirect methods based on parental activity allow estimation on a larger scale than traditional nest monitoring. However, a number of factors can influence parental activity and its observation. Here, we studied factors influencing nestling feeding frequency and the probability of observing food transport by parents at Forêt Montmorency, a boreal forest located in southern Québec. Seventeen nests of nine different species were monitored during summer of 2010. Feeding frequency increased with nestling age and decreased with precipitation. Probability of observing food transport decreased throughout the morning and with distance to nest. Frequency of visits to the nest and probability of observing food transport were not influenced by ambient temperature, and were not correlated. Our results indicate that biotic and abiotic factors can influence feeding frequency and observation of food transport. However, the same factors have a different effect on each phenomenon, which suggests a complexity greater than expected in the relationship between feeding frequency and observation of food transport. Keywords : nestling provisioning, food transport, parental activity, nesting success, reproductive success, reproductive index, factors influencing provisioning.
Document Type: Mémoire de maîtrise
Issue Date: 2011
Open Access Date: 18 April 2018
Permalink: http://hdl.handle.net/20.500.11794/22912
Grantor: Université Laval
Collection:Thèses et mémoires

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