02237nas a2200229   4500008004100000245010100041210006900142260001600211300001400227490000800241520150700249100003101756700001801787700002201805700002001827700001901847700002301866700002301889700002501912700001501937856005501952       2017                        eng d00aNegative impact of urban noise on sexual receptivity and clutch size in female domestic canaries0 aNegative impact of urban noise on sexual receptivity and clutch   cJan-11-2017  a843 - 8530 v1233 a<p>In oscines, male song stimulates female reproduction and females are known to adjust both their sexual preferences and their maternal investment according to song quality. Female domestic canaries are especially responsive to wide frequency bandwidth (4 kHz) male songs emitted with a high-repetition syllable rate and low minimal frequencies (1 kHz). We previously showed that low-frequency urban noise decreases female sexual responsiveness for these low-frequency songs (1&ndash;5 kHz) through auditory masking. Based on the differential allocation hypothesis, we predicted that urban noise exposure will equally affect female maternal investment. Using a crossover design, we broadcast low-frequency songs to females either in an overlapping noise condition or in an alternating noise condition. Females decreased both their sexual responsiveness and their clutch size in the overlapping noise treatment relative to the alternative noise treatment. No differences were found concerning egg size or egg composition (yolk and albumen mass, testosterone concentration). Due to our experimental design, we can exclude a general impact of noisy conditions and thereby provide evidence for a detrimental effect through masking on avian courtship and reproductive output. These results suggest that noisy conditions may also affect avian communication in outdoor conditions, which may partly explain field reports on noise-dependent breeding success and reduced breeding densities at noisy sites.</p>
1 aAunay, Guillaume, Huet des1 aGrenna, Marco1 aSlabbekoorn, Hans1 aNicolas, Pierre1 aNagle, Laurent1 aLeboucher, Gérard1 aMalacarne, Giorgio1 aDraganoiu, Tudor, I.1 aFusani, L.  uhttp://doi.wiley.com/10.1111/eth.2017.123.issue-11