Do flocks of great cormorants and goosanders avoid spatial overlap in foraging habitat during the non-breeding season?
PBN-AR
Instytucja
Instytut Ochrony Przyrody Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
angielski
Czasopismo
AQUATIC ECOLOGY (25pkt w roku publikacji)
ISSN
1386-2588
EISSN
1573-5125
Wydawca
SPRINGER
DOI
URL
Rok publikacji
2017
Numer zeszytu
3
Strony od-do
473-483
Numer tomu
51
Identyfikator DOI
Liczba arkuszy
Słowa kluczowe
angielski
Mergus merganser
Phalacrocorax carbo
Piscivores
Interspecific competition
Spatial ecology
Open access
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Wersja opublikowana
Licencja otwartego dostępu
Creative Commons — Uznanie autorstwa
Czas opublikowania w otwartym dostępie
Razem z publikacją
Data udostępnienia w sposób otwarty
2017-05-30
Streszczenia
Język
angielski
Treść
Species distribution, ecology, and behaviour are shaped, amongst other things, by interspecific, antagonistic interactions, and this phenomenon is particularly noticeable among predators. We studied the spatial co-distribution of two top piscivorous bird species foraging on inland waters outside breeding season. We considered the hypothesis that goosanders, Mergus merganser, and great cormorants, Phalacrocorax carbo, avoid foraging in close proximity to each other. Data collected on five river-reservoir systems in the Western Carpathians (Poland and Slovakia) during two periods (2014–2015 and 2015–2016) showed that goosander numbers reduced significantly and their foraging areas changed when large flocks of cormorants arrived and began foraging. We also found that inter-flock distances were greatest between flocks of goosanders and cormorants, suggesting that the former species avoided the waters occupied by the latter. Distribution of flocks of both species was additionally determined by the location of foraging place in river-reservoir system, weather, and presence of other piscivorous birds (e.g. grebes) and raptors (e.g. eagles). Together with the results of research in adjacent Bohemia, this study suggests that competition between cormorants and goosanders may arise when bodies of water suitable for piscivorous foraging are scattered and limited in number, as in the mountainous areas of Central Europe.
Inne
System-identifier
PX-594ce5aed5de4db14544cfe0
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