Seasonal migrations of North Atlantic minke whales: novel insights from large-scale passive acoustic monitoring networks

Movement Ecology

Sofie M Van Parijs⁹  Hans Verdaat^1,12  Kathleen M Stafford²  Ursula Siebert⁵  Monica A Silva^1,14  Aaron N Rice⁷  Andrew J Read⁴  Christian Ramp^1,13  Cristian Marian Popescu⁷  Sharon L Nieukirk^1,11  David K Mellinger^1,11  Klaus Lucke³  Anurag Kumar^1,10  Lynne EW Hodge⁴  Peter J Dugan⁷  Genevieve E Davis⁶  Christopher W Clark⁷  Manuel Castellote¹  Denise Risch⁸ 

[1] National Marine Mammal Laboratory, Alaska Fisheries Science Center, National Marine Fisheries Service, NOAA, Seattle, WA, USA;Applied Physics Laboratory, University of Washington, Seattle, WA, USA;Centre for Marine Science & Technology, Curtin University, Perth, WA, Australia;Duke University Marine Laboratory, Beaufort, NC, USA;Institute for Terrestrial and Aquatic Wildlife Research, University of Veterinary Medicine Hannover, Foundation, Büsum, Germany;Under Contract with Northeast Fisheries Science Center, National Marine Fisheries Service, NOAA, Woods Hole, MA, USA;Bioacoustics Research Program, Laboratory of Ornithology, Cornell University, Ithaca, NY, USA;Scottish Association for Marine Science (SAMS), Scottish Marine Institute, Oban, Argyll, Scotland, UK;Northeast Fisheries Science Center, National Marine Fisheries Service, NOAA, Woods Hole, MA, USA;Naval Facilities Engineering Command Atlantic, Norfolk, VA, USA;NOAA Pacific Marine Environmental Laboratory, Newport, OR, USA;IMARES Wageningen UR, Ecosystem Department, Den Burg, Texel, The Netherlands;Mingan Island Cetacean Study, Longue-Pointe-de-Mingan, QC, Canada;Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA, USA

关键词: Geographic variation;    Seasonality;    Pulse trains;    Migration;    Balaenoptera acutorostrata;    Minke whales;    Passive acoustic monitoring (PAM);   

Others  :  1132171
DOI  :  10.1186/s40462-014-0024-3

 received in 2014-07-11, accepted in 2014-10-16,  发布年份 2014

【 摘 要 】

Background

Little is known about migration patterns and seasonal distribution away from coastal summer feeding habitats of many pelagic baleen whales. Recently, large-scale passive acoustic monitoring networks have become available to explore migration patterns and identify critical habitats of these species. North Atlantic minke whales (Balaenoptera acutorostrata) perform seasonal migrations between high latitude summer feeding and low latitude winter breeding grounds. While the distribution and abundance of the species has been studied across their summer range, data on migration and winter habitat are virtually missing. Acoustic recordings, from 16 different sites from across the North Atlantic, were analyzed to examine the seasonal and geographic variation in minke whale pulse train occurrence, infer information about migration routes and timing, and to identify possible winter habitats.

Results

Acoustic detections show that minke whales leave their winter grounds south of 30° N from March through early April. On their southward migration in autumn, minke whales leave waters north of 40° N from mid-October through early November. In the western North Atlantic spring migrants appear to track the warmer waters of the Gulf Stream along the continental shelf, while whales travel farther offshore in autumn. Abundant detections were found off the southeastern US and the Caribbean during winter. Minke whale pulse trains showed evidence of geographic variation, with longer pulse trains recorded south of 40° N. Very few pulse trains were recorded during summer in any of the datasets.

Conclusion

This study highlights the feasibility of using acoustic monitoring networks to explore migration patterns of pelagic marine mammals. Results confirm the presence of minke whales off the southeastern US and the Caribbean during winter months. The absence of pulse train detections during summer suggests either that minke whales switch their vocal behaviour at this time of year, are absent from available recording sites or that variation in signal structure influenced automated detection. Alternatively, if pulse trains are produced in a reproductive context by males, these data may indicate their absence from the selected recording sites. Evidence of geographic variation in pulse train duration suggests different behavioural functions or use of these calls at different latitudes.

【 授权许可】

   
2014 Risch et al.; licensee BioMed Central Ltd.

【 图 表 】

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