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North Atlantic minke whale (Balaenoptera acutorostrata) feeding habits and migrations evaluated by stable isotope analysis of baleen.

Published version
Peer-reviewed

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Authors

Eerkes-Medrano, Dafne  ORCID logo  https://orcid.org/0000-0001-6778-1241
Blix, Arnoldus S 

Abstract

Isotopic analyses of the incrementally growing baleen in Mysticeti have been used to learn about their feeding and movement patterns. Using methods previously applied to Pacific minke whales, stable δ15N and δ13C isotope values were measured along the baleen plates of male and female minke whales from two locations in the Northeast Atlantic. The sample sizes used in this study are comparable to those previously used in the literature, and, although limited in size, the evidence suggests differences in isotopic signatures between whales caught at different locations. Both the δ15N and δ13C data suggest whales at the higher latitude site of Svalbard have a narrower diet than the whales from Lofoten/Vesterålen in Norway. Across all whales, the δ15N data indicate the whales primarily prey on fish for much of the year, only switching to zooplankton during the spring bloom. The δ13C data fail to confirm whether the whales migrate over long distances.

Description

Keywords

RESEARCH ARTICLE, RESEARCH ARTICLES, baleen, diet, migration, minke whale, stable isotopes

Journal Title

Ecol Evol

Conference Name

Journal ISSN

2045-7758
2045-7758

Volume Title

Publisher

Wiley