Common Goldeneye Breeding in the Eastern Canadian Boreal Forest: Factors Affecting Productivity Estimates

We conducted multiple Common Goldeneye (Bucephala clangula) aerial surveys between 1 May and 31 July 2004 and 2005 on the Péribonka River, where a new hydroelectric reservoir will be created in 2007. We also conducted single pair and brood surveys on randomly chosen 5 × 5-km plots on the River dra...inage basin. Objectives were to assess the validity of the impact assessment surveys of 2002, examine the variation in pair and brood numbers, and determine recruitment and habitat characteristics related to productivity. During both years, the number of indicated breeding pairs (IBPs) declined steadily through May, whereas the social index (paired males/lone males) remained stable, declining only when few IBPs were located. However, backdated number of paired and lone males from observed broods suggested that the number of pairs remained maximal and constant during a three-week period centered on the fourth week of May in 2004 and the second week of May in 2005. IBP density (IBPs/10 km of shoreline) was 1.40 on the River and 0.64 in its drainage basin on average in 2005 (no surveys in 2004). When compared to results of the Black Duck Joint Venture (BDJV) surveys, IBP density was higher on the River by 0.69 IBPs in 2002, whereas densities in the two areas differed only by 0.07-0.29 in Ausführliche Beschreibung Beschreibung ausblenden

1. Person:	Bolduc, François
Weitere Personen:	Lapointe, Stéphane verfasserin; Gagnon, Benoit verfasserin
Quelle:	in Waterbirds Vol. 31, No. 1 (2008), p. 42-51 Weitere Artikel
Format:	Online-Artikel
Sprache:	English
Veröffentlicht:	2008
Beschreibung:	Online-Ressource
Schlagworte:	research-article Aerial survey Boreal forest Bucephala clangula Common Goldeneye Productivity Waterfowl Wetlands
Online Zugang:	Volltext
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Anmerkung:	Copyright: Copyright 2007 Waterbird Society