Výsledky vyhledávání - "R. W. G. Caldow"

The effect of food availability on the foraging behaviour of breeding Great Skuas Catharacta skua and Arctic Skuas Stercorarius parasiticus

Autor: R. W. Furness, R. W. G. Caldow

Publikováno v: Journal of Avian Biology. 31:367-375

Seabirds’ behavioural activity budgets have been proposed as an indicator of changes in marine food supplies. Reduced recruitment and a low biomass of sandeels Ammodytes spp. around Shetland in the late 1980s were associated with a dramatic increas

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::028e4404c780a8a66fd371b7b5475107
https://doi.org/10.1034/j.1600-048x.2000.310313.x

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The influence of food availability on the breeding effort and reproductive success of Arctic Skuas Stercorarius parasiticus

Autor: R. W. G. Caldow, Robert W. Furness, Richard A. Phillips

Publikováno v: Ibis. 138:410-419

Territorial attendance, chick growth rate and breeding success of Arctic Skuas Stercorarius parasiticus in Shetland were lowest in the late 1980s when recruitment of Sandeels Am-modytes marinus in the surrounding waters was poor. The relationships be

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e14a2e191ec8416dd2eac1cbb1abd1cb
https://doi.org/10.1111/j.1474-919x.1996.tb08059.x

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A histochemical comparison of fibre types in the M. pectoralis and M. supracoracoideus of the great skua Catharacta skua and the herring gull Larus argentatus with reference to kleptoparasitic capabilities

Autor: R. W. G. Caldow, Robert W. Furness

Publikováno v: Journal of Zoology. 229:91-103

Skuas, which are closely related to gulls, frequently use a specialized feeding method (kleptoparasitism) by which they rob other seabirds of their food. This paper tests the idea that skuas have evolved as specialist kleptoparasites. The fibre type

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b8312f4fb401cfd389b249b374e8254f
https://doi.org/10.1111/j.1469-7998.1993.tb02623.x

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The effects of changes in food availability on the breeding ecology of great skuas Catharacta skua in Shetland

Autor: R. W. G. Caldow, Robert W. Furness, Keith C. Hamer

Publikováno v: Journal of Zoology. 223:175-188

Great skuas on Foula, Shetland have responded to a decline in the availability of sandeels since the late 1970s by increasing the proportion of other items in their diets. This change is correlated with the annual recruitment of sandeels in Shetland

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a084b70d5b9692957de3ad1291e3e842
https://doi.org/10.1111/j.1469-7998.1991.tb04758.x

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