{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,7]],"date-time":"2026-02-07T23:13:21Z","timestamp":1770506001006,"version":"3.49.0"},"reference-count":40,"publisher":"Acoustical Society of America (ASA)","issue":"2","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2006,2,1]]},"abstract":"<jats:p>This study compares the efficiency of transmission of the advertisement calls of two species of midwife toads, Alytes cisternasii and A. obstetricans, in both native and non-native habitats in the Iberian Peninsula. Recorded calls of both species and pure tones were broadcast at ten sites native to either the relatively small A. cisternasii or the larger A. obstetricans. A large variation in the patterns of excess attenuation between localities was observed for calls measured at distances of 0.5to8m from a loudspeaker. However, attenuation rates were higher for calls of both species in habitats of A. obstetricans relative to habitats of A. cisternasii. The calls of A. obstetricans experienced lower attenuation rates than those of A. cisternasii in both conspecific and heterospecific localities. Thus, although A. cisternasii occupies habitats more favorable for sound transmission, its advertisement call spectrum is not optimized for these habitats; the calls of A. obstetricans suffer less attenuation in A. cisternasii habitats. This result argues against the notion that spectral features of the calls are adapted to enhance transmission efficiency in natural habitats, and suggests that differences in call dominant frequency between the two species result from constraints imposed by selection on body size.<\/jats:p>","DOI":"10.1121\/1.2149769","type":"journal-article","created":{"date-parts":[[2006,2,2]],"date-time":"2006-02-02T20:35:39Z","timestamp":1138912539000},"page":"1227-1237","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":25,"title":["Nonoptimal propagation of advertisement calls of midwife toads in Iberian habitats"],"prefix":"10.1121","volume":"119","author":[{"given":"Mario","family":"Penna","sequence":"first","affiliation":[{"name":"Universidad de Chile Programa de Fisiolog\u00eda y Biof\u00edsica, Facultad de Medicina, , Casilla 70005, Correo 7, Santiago, Chile"}]},{"given":"Rafael","family":"M\u00e1rquez","sequence":"additional","affiliation":[{"name":"Museo Nacional de Ciencias Naturales (CSIC) Fonoteca Zool\u00f3gica, Departamento de Biodiversidad y Biolog\u00eda Evolutiva, , Jos\u00e9 Guti\u00e9rrez Abascal 2, 28006 Madrid, Spain"}]},{"given":"Jaime","family":"Bosch","sequence":"additional","affiliation":[{"name":"Museo Nacional de Ciencias Naturales (CSIC) Fonoteca Zool\u00f3gica, Departamento de Biodiversidad y Biolog\u00eda Evolutiva, , Jos\u00e9 Guti\u00e9rrez Abascal 2, 28006 Madrid, Spain"}]},{"given":"Eduardo G.","family":"Crespo","sequence":"additional","affiliation":[{"name":"Universidade de Lisboa Departamento de Biologia Animal, Centro de Biologia Ambiental da Faculdade de Ciencias da , Bloco C2, Campo Grande.1749-016 Lisboa, Portugal"}]}],"member":"231","reference":[{"key":"2023072723530691300_c1","doi-asserted-by":"crossref","first-page":"283","DOI":"10.1163\/156853996X00152","article-title":"Responses to conspecific advertisement calls in the green frog (Rana clamitans) and their role in male\u2013male communication","volume":"133","year":"1996","journal-title":"Behaviour"},{"key":"2023072723530691300_c2","doi-asserted-by":"crossref","first-page":"257","DOI":"10.1080\/09524622.1999.9753404","article-title":"Atmospheric and underwater propagation of bullfrog vocalizations","volume":"9","year":"1999","journal-title":"Bioacoustics"},{"key":"2023072723530691300_c3","doi-asserted-by":"crossref","first-page":"75","DOI":"10.1163\/156853898X00340","article-title":"Size-dependent mating success and size assortative mating in the midwife toad Alytes obstetricans","volume":"19","year":"1998","journal-title":"Amphibia-Reptilia"},{"key":"2023072723530691300_c4","doi-asserted-by":"crossref","first-page":"880","DOI":"10.1139\/z04-060","article-title":"Are frog calls modulated by the environment? 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(1999). \u201cThe influence of signal attenuation and degradation on behavior and midbrain auditory thresholds in the cricket frog, Acris crepitans Blanchardi,\u201d Unpublished doctoral dissertation, University of Texas at Austin."},{"key":"2023072723530691300_c39","doi-asserted-by":"crossref","first-page":"429","DOI":"10.1007\/BF00300189","article-title":"Fighting, assessment, and frequency alteration in Blanchard\u2019s cricket frog","volume":"25","year":"1989","journal-title":"Behav. Ecol. 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