Who's your neighbor? Acoustic cues to individual identity in red squirrel Tamiasciurus hudsonicus rattle calls
North American red squirrels Tamiasciurus hudsonicus often produce a loud territorial rattle call when conspecifics enter or invade a territory. Previous playback experiments suggest that the territorial rattle call may indicate an invader's identity as squirrels responded more intensely to cal...
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| Format: | Article |
| Language: | English |
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Oxford University Press
2012-10-01
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| Series: | Current Zoology |
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| Online Access: | http://www.currentzoology.org/paperdetail.asp?id=12121 |
| _version_ | 1811284469479374848 |
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| author | Shannon M. DIGWEED, Drew RENDALL, Teana IMBEAU |
| author_facet | Shannon M. DIGWEED, Drew RENDALL, Teana IMBEAU |
| author_sort | Shannon M. DIGWEED, Drew RENDALL, Teana IMBEAU |
| collection | DOAJ |
| description | North American red squirrels Tamiasciurus hudsonicus often produce a loud territorial rattle call when conspecifics enter or invade a territory. Previous playback experiments suggest that the territorial rattle call may indicate an invader's identity as squirrels responded more intensely to calls played from strangers than to calls played from neighbors. This dear-enemy effect is well known in a variety of bird and mammal species and functions to reduce aggressive interactions between known neighbors. However, although previous experiments on red squirrels suggest some form of individual differentiation and thus recognition, detailed acoustic analysis of potential acoustic cues in rattle calls have not been conducted. If calls function to aid in conspecific identification in order to mitigate aggressive territorial interactions, we would expect that individual recognition cues would be acoustically represented. Our work provides a detailed analysis of acoustic cues to identity within rattle calls. A total of 225 calls across 32 individual squirrels from Sheep River Provincial Park, Kananaskis, AB, Canada, were analyzed with discriminant function analysis for potential acoustic cues to individual identity. Initial analysis of all individuals revealed a reliable acoustic differentiation across individuals. A more detailed analysis of clusters of neighboring squirrels was performed and results again indicated a statistically significant likelihood that calls were assigned correctly to specific squirrels (55%-75% correctly assigned); in other words squirrels have distinct voices that should allow for individual identification and discrimination by conspecifics [Current Zoology 58 (5): 758–764, 2012]. |
| first_indexed | 2024-04-13T02:29:08Z |
| format | Article |
| id | doaj.art-2d2b5fbc1326489283ccfb0587d2bfe7 |
| institution | Directory Open Access Journal |
| issn | 1674-5507 |
| language | English |
| last_indexed | 2024-04-13T02:29:08Z |
| publishDate | 2012-10-01 |
| publisher | Oxford University Press |
| record_format | Article |
| series | Current Zoology |
| spelling | doaj.art-2d2b5fbc1326489283ccfb0587d2bfe72022-12-22T03:06:39ZengOxford University PressCurrent Zoology1674-55072012-10-01585758764Who's your neighbor? Acoustic cues to individual identity in red squirrel Tamiasciurus hudsonicus rattle callsShannon M. DIGWEED, Drew RENDALL, Teana IMBEAUNorth American red squirrels Tamiasciurus hudsonicus often produce a loud territorial rattle call when conspecifics enter or invade a territory. Previous playback experiments suggest that the territorial rattle call may indicate an invader's identity as squirrels responded more intensely to calls played from strangers than to calls played from neighbors. This dear-enemy effect is well known in a variety of bird and mammal species and functions to reduce aggressive interactions between known neighbors. However, although previous experiments on red squirrels suggest some form of individual differentiation and thus recognition, detailed acoustic analysis of potential acoustic cues in rattle calls have not been conducted. If calls function to aid in conspecific identification in order to mitigate aggressive territorial interactions, we would expect that individual recognition cues would be acoustically represented. Our work provides a detailed analysis of acoustic cues to identity within rattle calls. A total of 225 calls across 32 individual squirrels from Sheep River Provincial Park, Kananaskis, AB, Canada, were analyzed with discriminant function analysis for potential acoustic cues to individual identity. Initial analysis of all individuals revealed a reliable acoustic differentiation across individuals. A more detailed analysis of clusters of neighboring squirrels was performed and results again indicated a statistically significant likelihood that calls were assigned correctly to specific squirrels (55%-75% correctly assigned); in other words squirrels have distinct voices that should allow for individual identification and discrimination by conspecifics [Current Zoology 58 (5): 758–764, 2012].http://www.currentzoology.org/paperdetail.asp?id=12121Vocal communicationTerritory callsRed squirrelDear-enemyIndividual identity |
| spellingShingle | Shannon M. DIGWEED, Drew RENDALL, Teana IMBEAU Who's your neighbor? Acoustic cues to individual identity in red squirrel Tamiasciurus hudsonicus rattle calls Current Zoology Vocal communication Territory calls Red squirrel Dear-enemy Individual identity |
| title | Who's your neighbor? Acoustic cues to individual identity in red squirrel Tamiasciurus hudsonicus rattle calls |
| title_full | Who's your neighbor? Acoustic cues to individual identity in red squirrel Tamiasciurus hudsonicus rattle calls |
| title_fullStr | Who's your neighbor? Acoustic cues to individual identity in red squirrel Tamiasciurus hudsonicus rattle calls |
| title_full_unstemmed | Who's your neighbor? Acoustic cues to individual identity in red squirrel Tamiasciurus hudsonicus rattle calls |
| title_short | Who's your neighbor? Acoustic cues to individual identity in red squirrel Tamiasciurus hudsonicus rattle calls |
| title_sort | who s your neighbor acoustic cues to individual identity in red squirrel tamiasciurus hudsonicus rattle calls |
| topic | Vocal communication Territory calls Red squirrel Dear-enemy Individual identity |
| url | http://www.currentzoology.org/paperdetail.asp?id=12121 |
| work_keys_str_mv | AT shannonmdigweeddrewrendallteanaimbeau whosyourneighboracousticcuestoindividualidentityinredsquirreltamiasciurushudsonicusrattlecalls |