Culturally transmitted song exchange between humpback whales ( Megaptera novaeangliae ) in the southeast Atlantic and southwest Indian Ocean basins.

Autor:	Rekdahl ML; Wildlife Conservation Society, Ocean Giants Program, Global Conservation Program, 2300 Southern Boulevard, Bronx, NY 10460-1099, USA., Garland EC; School of Biology, University of St Andrews, St Andrews, Fife KY16 9TH, UK., Carvajal GA; Wildlife Conservation Society, Ocean Giants Program, Global Conservation Program, 2300 Southern Boulevard, Bronx, NY 10460-1099, USA.; School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY 11794-5000, USA., King CD; Wildlife Conservation Society, Ocean Giants Program, Global Conservation Program, 2300 Southern Boulevard, Bronx, NY 10460-1099, USA., Collins T; Wildlife Conservation Society, Ocean Giants Program, Global Conservation Program, 2300 Southern Boulevard, Bronx, NY 10460-1099, USA., Razafindrakoto Y; COSAP Sahamalaza Miaro Dugong C/O Madagascar National Parks Sahamalaza, Analalava, Maromandia, Madagascar., Rosenbaum H; Wildlife Conservation Society, Ocean Giants Program, Global Conservation Program, 2300 Southern Boulevard, Bronx, NY 10460-1099, USA.
Jazyk:	angličtina
Zdroj:	Royal Society open science [R Soc Open Sci] 2018 Nov 28; Vol. 5 (11), pp. 172305. Date of Electronic Publication: 2018 Nov 28 (Print Publication: 2018).
DOI:	10.1098/rsos.172305
Abstrakt:	In migratory marine species, investigating population connectivity and structure can be challenging given barriers to dispersal are less evident and multiple factors may influence individual movement patterns. Male humpback whales sing a song display that can provide insights into contemporary connectivity patterns, as there can be a cultural exchange of a single, population-wide shared song type with neighbouring populations in acoustic contact. Here, we investigated song exchange between populations located on the east and west coasts of Africa using 5 years of concurrent data (2001-2005). Songs were qualitatively and quantitatively transcribed by measuring acoustic features of all song units and then compared using both Dice's similarity index and the Levenshtein distance similarity index (LSI) to quantitatively calculate song similarity. Song similarity varied among individuals and potentially between populations depending on the year (Dice: 36-100%, LSI: 21-100%), suggesting varying levels of population connectivity and/or interchange among years. The high degree of song sharing indicated in this study further supports genetic studies that demonstrate interchange between these two populations and reinforces the emerging picture of broad-scale connectivity in Southern Hemisphere populations. Further research incorporating additional populations and years would be invaluable for better understanding of fine-scale, song interchange patterns between Southern Hemisphere male humpback whales. Competing Interests: We declare we have no competing interests.
Databáze:	MEDLINE
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