Variations in Vocalizations of Fin Whales, Balaenoptera physalus, in the St. Lawrence River
Recordings were made of vocalizations from fin whales, Balaenoptera physalus from a fixed hydrophone in the St. Lawrence River between 28 June and 27 September 1979. Land-based observers monitored activity from a hillside hut while recordings were being made from a shoreline site. Photographs of dor...
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ftunivmaryland:oai:drum.lib.umd.edu:1903/32590 2024-06-23T07:51:33+00:00 Variations in Vocalizations of Fin Whales, Balaenoptera physalus, in the St. Lawrence River Edds, Peggy Louise Buchler, Edward Digital Repository at the University of Maryland University of Maryland (College Park, MD) Animal & Avian Sciences 1980 application/pdf http://hdl.handle.net/1903/32590 https://doi.org/10.13016/mzia-ph9q unknown https://doi.org/10.13016/mzia-ph9q ILLiad # 1637991 http://hdl.handle.net/1903/32590 Thesis 1980 ftunivmaryland https://doi.org/10.13016/mzia-ph9q 2024-06-12T00:14:08Z Recordings were made of vocalizations from fin whales, Balaenoptera physalus from a fixed hydrophone in the St. Lawrence River between 28 June and 27 September 1979. Land-based observers monitored activity from a hillside hut while recordings were being made from a shoreline site. Photographs of dorsal fin variations were used to identify distinctive individuals. The 1522 sounds recorded were classified into 11 categories based on frequency and temporal characteristics. The predominant call was a descending sweep of frequencies. Parameters measured for this downsweep exhibited a dichotomy of characteristics which indicates calls with initial frequencies below 40 Hz have less variability than calls with initial frequencies above 40 Hz. In general, solitary animals produced primarily the lower frequency downsweeps. Higher frequency downsweeps were recorded from pairs or trios of fin whales. Solitary individuals did not exhibit unique variations in downsweep parameters. No clusters of values which might indicate uniquely individual ranges were consistently present in multiple animal recordings. The data suggest that the variability of fin whale vocalizations is primarily contextual rather than individual. Thesis Balaenoptera physalus Fin whale University of Maryland: Digital Repository (DRUM) Lawrence River ENVELOPE(-115.002,-115.002,58.384,58.384) |
institution |
Open Polar |
collection |
University of Maryland: Digital Repository (DRUM) |
op_collection_id |
ftunivmaryland |
language |
unknown |
description |
Recordings were made of vocalizations from fin whales, Balaenoptera physalus from a fixed hydrophone in the St. Lawrence River between 28 June and 27 September 1979. Land-based observers monitored activity from a hillside hut while recordings were being made from a shoreline site. Photographs of dorsal fin variations were used to identify distinctive individuals. The 1522 sounds recorded were classified into 11 categories based on frequency and temporal characteristics. The predominant call was a descending sweep of frequencies. Parameters measured for this downsweep exhibited a dichotomy of characteristics which indicates calls with initial frequencies below 40 Hz have less variability than calls with initial frequencies above 40 Hz. In general, solitary animals produced primarily the lower frequency downsweeps. Higher frequency downsweeps were recorded from pairs or trios of fin whales. Solitary individuals did not exhibit unique variations in downsweep parameters. No clusters of values which might indicate uniquely individual ranges were consistently present in multiple animal recordings. The data suggest that the variability of fin whale vocalizations is primarily contextual rather than individual. |
author2 |
Buchler, Edward Digital Repository at the University of Maryland University of Maryland (College Park, MD) Animal & Avian Sciences |
format |
Thesis |
author |
Edds, Peggy Louise |
spellingShingle |
Edds, Peggy Louise Variations in Vocalizations of Fin Whales, Balaenoptera physalus, in the St. Lawrence River |
author_facet |
Edds, Peggy Louise |
author_sort |
Edds, Peggy Louise |
title |
Variations in Vocalizations of Fin Whales, Balaenoptera physalus, in the St. Lawrence River |
title_short |
Variations in Vocalizations of Fin Whales, Balaenoptera physalus, in the St. Lawrence River |
title_full |
Variations in Vocalizations of Fin Whales, Balaenoptera physalus, in the St. Lawrence River |
title_fullStr |
Variations in Vocalizations of Fin Whales, Balaenoptera physalus, in the St. Lawrence River |
title_full_unstemmed |
Variations in Vocalizations of Fin Whales, Balaenoptera physalus, in the St. Lawrence River |
title_sort |
variations in vocalizations of fin whales, balaenoptera physalus, in the st. lawrence river |
publishDate |
1980 |
url |
http://hdl.handle.net/1903/32590 https://doi.org/10.13016/mzia-ph9q |
long_lat |
ENVELOPE(-115.002,-115.002,58.384,58.384) |
geographic |
Lawrence River |
geographic_facet |
Lawrence River |
genre |
Balaenoptera physalus Fin whale |
genre_facet |
Balaenoptera physalus Fin whale |
op_relation |
https://doi.org/10.13016/mzia-ph9q ILLiad # 1637991 http://hdl.handle.net/1903/32590 |
op_doi |
https://doi.org/10.13016/mzia-ph9q |
_version_ |
1802642658005352448 |