Inny tytuł:

Selekcja na wielkość zdobyczy sympatrycznie występujących srokosza i pustułki ; Selection of lizard size by predatory birds

Współtwórca:

Museum and Institute of Zoology, Polish Academy of Sciences

Wydawca:

Museum and Institute of Zoology, Polish Academy of Sciences ; Natura Optima Dux Foundation

Miejsce wydania:

Warsaw

Opis:

pg(s) 167–172

Typ obiektu:

Journal/Article

Abstrakt:

Size-related selection of insular lizards by two sympatric predatory bird species (Southern Grey Shrike and Eurasian Kestrel) was studied in an arid insular environment. The endemic lizard genus Gallotia was a key resource in the diet of both predators, constituting more than 50% of the total biomass. Shrikes captured smaller lizards than kestrels during all seasons (mean snout - vent length (SVL): 7.4 ±1.9 vs. 9.4 ± 2.1 cm respectively), presenting a sequential use of lizard sizes and avoiding potential competition. On the other hand, shrikes and kestrels showed the same seasonal variation pattern, capturing the largest lizards during their breeding periods (spring). Considering lizard availability, shrikes displayed less selective predation than kestrels in all seasons. Shrikes positively selected the medium lizard size (SVL: 5–10 cm) during the nestling period, but negatively selected the small lizard size (SVL: < 5 cm) in autumn and winter, probably due to an explosion of juvenile lizards. Lastly, kestrels appeared to be more selective, negatively choosing the small lizard size but positively selecting the largest ones all the year round (SVL: > 10 cm).

Czasopismo/Seria/cykl:

Acta Ornithologica

Tom:

42

Zeszyt:

2

Strona pocz.:

167

Strona końc.:

172

Szczegółowy typ zasobu:

Journal

Format:

text/xml

Identyfikator zasobu:

oai:rcin.org.pl:55655 ; 10.3161/068.042.0211

Źródło:

MiIZ PAN, call no. P.257 ; MiIZ PAN, call no. P.4568 ; kliknij tutaj, żeby przejść

Język:

eng

Język streszczenia:

eng ; pol

Prawa:

Rights Reserved - Free Access

Zasady wykorzystania:

Copyright-protected material. May be used within the limits of statutory user freedoms

Digitalizacja:

Museum and Institute of Zoology of the Polish Academy of Sciences

Lokalizacja oryginału:

Library of the Museum and Institute of Zoology of the Polish Academy of Sciences

Dostęp:

Open