Spatial and temporal variation in foraging of breeding red‐throated divers
نویسندگان
چکیده
Differing environmental conditions can have profound effects on many behaviours in animals, especially where species large geographic ranges. Seasonal changes or progression through life history stages impose differential constraints, leading to behaviours. Furthermore, which show flexibility behaviours, may a higher capacity adapt anthropogenic-induced their environment. The red-throated diver (RTD) is an aquatic bird, that able forage both freshwater and marine environments, though little else known about its different conditions. Here, we use time-depth recorders saltwater immersion loggers examine the foraging behaviour of RTDs from three regions across northwest Europe. We found breeding season, birds two (Iceland Scotland) foraged environment, while Finland, predominantly freshwater. Most differences diving characteristics were at least partly explained by habitat. Additionally, time spent did not change dives generally became more pelagic less benthic over suggesting either switched prey followed vertical movements, rather than increasing effort. There was preference for daylight crepuscular hours, with stronger effect sites. Overall, provide first investigation RTD multiple demonstrate variation strategies this generalist predator, most likely due local
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ژورنال
عنوان ژورنال: Journal of Avian Biology
سال: 2021
ISSN: ['1600-048X', '0908-8857']
DOI: https://doi.org/10.1111/jav.02702