Animal Communication: City Birds Have Changed Their Tune
نویسنده
چکیده
Birds adjust their songs to make themselves heard in the presence of ambient noise. New research comparing songs of great tits across Europe shows how animals adapt their signals to the urban din.
منابع مشابه
Higher songs of city birds may not be an individual response to noise.
It has been observed in many songbird species that populations in noisy urban areas sing with a higher minimum frequency than do matched populations in quieter, less developed areas. However, why and how this divergence occurs is not yet understood. We experimentally tested whether chronic noise exposure during vocal learning results in songs with higher minimum frequencies in great tits (Parus...
متن کاملBird song and anthropogenic noise: vocal constraints may explain why birds sing higher-frequency songs in cities.
When animals live in cities, they have to adjust their behaviour and life histories to novel environments. Noise pollution puts a severe constraint on vocal communication by interfering with the detection of acoustic signals. Recent studies show that city birds sing higher-frequency songs than their conspecifics in non-urban habitats. This has been interpreted as an adaptation to counteract mas...
متن کاملAppraisal of Hematological Indices and Humoral Immunity in Commercial Laying Hens Fed Rations Consisting Cottonseed Meal and Sodium Bentonite
The objective of this study was to evaluate the effects of cottonseed meal (CSM) treated with sodium bentonite (SB) on certain blood components and immune response of laying hens. A 3 × 3 factorial arrangement with 3 levels of SB (0, 10, and 20 g/kg of diet) and 3 levels of CSM (0, 100 and 200 g/kg of diet) were used within 9 dietary treatments of 4 replicates each. Nine mash diets were fed to ...
متن کاملTalking with animals
From ancient herders calling their fl ocks to today’s pet owners conversing with their cats or dogs, humans have always tried to extend their communication to other species. Francis of Assisi famously held a sermon to birds, whom he called his brothers and sisters. Stories, real, enhanced or imagined, abound through the ages, from deities taking animal shapes to modern horse whisperers. In many...
متن کاملThe Physiological Responses to Dietary Administration of Zinc Bacitracin and Bacillus Mixture on Low-Weight Day-Old Chicks
This study investigated the responses of low-weight day-old chicks to zinc bacitracin and Bacillus mixture on growth performance, hematology, intestinal selected microbiota populations, and carcass characteristics. A total of 192 unsexed Lohman MB-202 day-old broiler chicks were randomly allotted to four dietary treatment groups of 48 chicks each (6 replicates of 8 chicks) and fed for 35 days. ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Current Biology
دوره 16 شماره
صفحات -
تاریخ انتشار 2006