Inny tytuł:

Acta Ornithologica, vol. 34, no. 2 ; Odwracalność zmian wielkości żołądka ptaków brodzących: kiedy, w jakim stopniu i dlaczego? ; Flexible stomach of shorebirds

Współtwórca:

Polska Akademia Nauk. Muzeum i Instytut Zoologii ; Meeting of the European Ornithologists' Union (2 ; 1999 ; Gdańsk)

Wydawca:

Muzeum i Instytut Zoologii PAN

Miejsce wydania:

Warszawa

Opis:

Referat wygłoszony na Second Meeting of the European Ornithologists' Union ; Bibliogr. p. 180-181 ; P. [175]-181 : ill. ; 27 cm ; Abstract in Polish. Taxa in Latin

Typ obiektu:

Journal/Article

Abstrakt:

Shorebirds show large interspecific variation in the relative size of the stomach, and especially of the muscular part, the gizzard. Much of this variation can be explained by their diet. Species feeding mainly on hard-shelled prey such as bivalves and gastropods have large stomachs; those feeding on soft-bodied prey such as worms have small stomachs. Within a species, diet- and migration-induced changes in stomach size can occur. Our studies on this intraspecific variation have focused on two mollusc-specialists, the Red Knot Calidris canutus and the Great Knot C. tenuirostris. Both are renowned for long-range flights between their arctic or sub-arctic alpine breeding grounds and a variety of coastal wetlands. Feeding mainly on shellfish ingested whole, both knot species have large stomachs, but changing diets easily lead to apparently adaptive modifications. In addition, the demands imposed by flights of many thousand kilometres may induce reductions in stomach size. Using ultrasonography we have begun to experimentally disentangle the causal relationships between diet, season and stomach size in Red Knots. A soft diet can induce stomach reductions of 50% within a week, and such changes are reversible. Studies on radiomarked birds in the Wadden Sea emphasize that variations in stomach size are correlated with prey and patch choice in the field.

Czasopismo/Seria/cykl:

Acta Ornithologica

Tom:

34

Zeszyt:

2

Strona pocz.:

175

Strona końc.:

181

Szczegółowy typ zasobu:

Article

Format:

application/pdf

Identyfikator zasobu:

oai:rcin.org.pl:45217

Źródło:

MiIZ PAN, call no. P.257, Vol. 34, No 2 ; MiIZ PAN, call no. P.4568, Vol. 34, No 2 ; kliknij tutaj, żeby przejść

Język:

eng ; pol

Prawa:

Rights Reserved - Restricted Access

Zasady wykorzystania:

Copyright-protected material. Access only on terminals at the Museum and Institute of Zoology of the Polish Academy of Sciences, 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

Dofinansowane ze środków:

Programme Innovative Economy, 2010-2014, Priority Axis 2. R&D infrastructure ; European Union. European Regional Development Fund

Dostęp:

Closed