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Author (up) Abgrall, P; Terhune, J; Burton, H. openurl 
  Title Variation of Weddell seal (Leptonychotes weddellii) underwater vocalizations over mesogeographic ranges Type Journal Article
  Year 2003 Publication Aquatic Mammals Abbreviated Journal  
  Volume 29.2 Issue Pages 268-277  
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  Abstract The goal of this study was to determine if Weddell
seal (Leptonychotes weddellii) underwater vocalizations
exhibit regional diVerences over mesogeographic
ranges (600–2000 km). Recordings were
made along the Eastern Antarctic coastline at
Mawson, Davis and Casey research stations.
DiVerences in vocalizations were examined on three
levels: (1) presence of unique call types/categories.
(2) rate of occurrence of call types/categories, and
(3) call features (number of call elements, start
frequency, frequency shift, and duration).A total of
33 diVerent call types within 13 categories were
identi!ed. Two call types were unique to Davis and
one to each of Mawson and Casey. One category
was unique to Davis. Signi!cant diVerences in the
proportion of call usage among the three stations
were found for 23 of the 26 shared call types and all
11 of the shared call categories. All call features
varied among stations when compared simultaneously
or individually. While diVerences in
vocalizations were observed over the mesogeographic
range, some temporal variations also were
observed at two of the levels; call usage and
call features. Weddell seal groups separated by
>600 km exhibited diVerent vocal patterns.
 
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  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
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  Notes  
Census of Marine Life Projects
CAML - Census of Antarctic Marine Life
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