STORED NUTS CASTANOPSIS CUSPIDATA AS A FOOD RESOURCE OF NESTLING VARIED TITS PARUS VARIUS
نویسندگان
چکیده
منابع مشابه
Food Size, Energy Intake and Nutrient Intake of Nestling Tits, Parus varius and Parus major
The feeding rate, food size, energy intake and nutrient intake were studied for nestlings of the Varied Tit (Parus varius) and the Great Tit (Parus major) living in evergreen broad-leaved forest in Minamata, southern Kyushu, Japan. The frequency of daily feeding visit was around 100 times for both species. The diets of the two species were similar in general; feeding on lepidopteran larvae, mot...
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There is growing evidence that heterozygosity-fitness correlations (HFCs) are more pronounced under harsh conditions. Empirical evidence suggests a mediating effect of parasite infestation on the occurrence of HFCs. Parasites have the potential to mediate HFCs not only by generally causing high stress levels but also by inducing resource allocation tradeoffs between the necessary investments in...
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Urban environments are expanding rapidly, and with urbanization come both challenges and opportunities for wildlife. Challenges include combating the anthropogenic disturbances such as light, noise and air pollution and lower availability of natural food sources. The benefits are many, including the availability of anthropogenic food sources, breeding boxes and warmer temperatures. Thus, depend...
متن کاملNo evidence for survival selection on carotenoid-based nestling coloration in great tits (Parus major).
In several vertebrate species evidence supports the hypothesis that carotenoid-based coloration of adults has evolved due to sexual selection. However, in some birds already the nestlings display carotenoid-based coloration. Because the nestling's body plumage is typically moulted before the first reproductive event, sexual selection cannot explain the evolution of these carotenoid-based traits...
متن کاملCarotenoid diet and nestling provisioning in urban and rural great tits Parus major
Considering the importance of dietary constraints for the widely held view of carotenoid pigmentation as an honest quality indicator, there is surprisingly little data on carotenoid availability in different natural diets or along environmental gradients. Here we investigate the carotenoid availability in the main diet of breeding great tits Parus major , living in urban and rural environments ...
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ژورنال
عنوان ژورنال: Japanese Journal of Ornithology
سال: 1977
ISSN: 0040-9480,1881-9702
DOI: 10.3838/jjo1915.26.9