@article {58254,
	title = {Fin whale acoustic presence and song characteristics in seas to the southwest of Portugal},
	journal = {The Journal of the Acoustical Society of America},
	volume = {147},
	year = {2020},
	month = {Jan-04-2020},
	pages = {2235 - 2249},
	abstract = {<p>Fin whales were once abundant in the seas to the southwest of Portugal, but whaling activities decreased their numbers considerably. Acoustic data from ocean bottom seismometers provide an opportunity to detect fin whales from their notes, data that would otherwise be logistically challenging and expensive to obtain. Based on inter-note interval and frequency bandwidth, two acoustic patterns produced by fin whales were detected in the study area: pattern 1, described from fin whales in the Mediterranean Sea, and pattern 2, associated with fin whales from the northeast North Atlantic Ocean (NENA). NENA fin whales travel into the western Mediterranean Sea, but the Mediterranean population has not been documented to travel regularly into the NENA. In this study, 11\&thinsp;months of acoustic data recorded southwest of Portugal in the NENA were used to characterize 20-Hz fin whale notes into these patterns. Pattern 2 was the most common and occurred mostly in November\&ndash;January. Pattern 1 occurred less frequently and mostly in September\&ndash;December, February and April, which suggested a limited excursion of whales from the Mediterranean Sea. There were also occasions when the two patterns were recorded simultaneously. Results suggest that fin whales from the NENA and Mediterranean Sea might mix in the area during part of the year.</p>
},
	issn = {0001-4966},
	doi = {10.1121/10.0001066},
	url = {http://asa.scitation.org/doi/10.1121/10.0001066},
	author = {Pereira, Andreia and Harris, Danielle and Tyack, Peter and Matias, Luis}
}
@article {58230,
	title = {Bottlenose dolphin (Tursiops truncatus) calves appear to model their signature whistles on the signature whistles of community members},
	year = {2005},
	abstract = {<p>Bottlenose dolphins are unusual among non-human mammals in their ability to learn new sounds. This study investigates the importance of vocal learning in the development of dolphin signature whistles and the influence of social interactions on that process. We used focal animal behavioral follows to observe six calves in Sarasota Bay, Fla., recording their social associations during their first summer, and their signature whistles during their second. The signature whistles of five calves were determined. Using dynamic time warping (DTW) of frequency contours, the calves\&rsquo; signature whistles were compared to the signature whistles of several sets of dolphins: their own associates, the other calves\&rsquo; associates, Tampa Bay dolphins, and captive dolphins. Whistles were considered similar if their DTW similarity score was greater than those of 95\% of the whistle comparisons. Association was defined primarily in terms of time within 50 m of the mother/calf pair. On average, there were six dolphins with signature whistles similar to the signature whistles of each of the calves. These were significantly more likely to be Sarasota Bay resident dolphins than non-Sarasota dolphins, and (though not significantly) more likely to be dolphins that were within 50 m of the mother and calf less than 5\% of the time. These results suggest that calves may model their signature whistles on the signature whistles of members of their community, possibly community members with whom they associate only rarely.</p>
},
	keywords = {bottlenose dolphin, Social influences on learning, vocal learning, Whistle development},
	doi = {10.1007/s10071-004-0225-z},
	url = {http://link.springer.com/10.1007/s10071-004-0225-z},
	author = {Fripp, Deborah and Owen, Caryn and Quintana-Rizzo, Ester and Shapiro, Ari and Buckstaff, Kara and Jankowski, Kristine and Wells, Randall and Tyack, Peter}
}
