A bowhead whale in the eastern North Pacific.

Ecol Evol

Kitasoo/Xai'xais Nation Klemtu British Columbia Canada.

Published: February 2022

Bowhead whales occur in the Arctic year-round. Their movements are largely correlated with seasonal expansions and reductions of sea ice, but a few recent extralimital sightings have occurred in the eastern and western North Atlantic and one was also documented in the western North Pacific over 50 years ago. Here we present details of a juvenile bowhead whale that was photographed and filmed from above and below the water while it was skim-feeding in Caamaño Sound, BC, Canada on May 31, 2016. This sighting occurred over 2000 km southeast from the nearest known range for this species in the Bering Sea at a time that most bowhead whales in that region would have been migrating northeast. This sighting represents the first and only documentation of a bowhead whale in the eastern North Pacific to date.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8901862PMC
http://dx.doi.org/10.1002/ece3.8664DOI Listing

Publication Analysis

Top Keywords

bowhead whale
12
north pacific
12
whale eastern
8
eastern north
8
bowhead whales
8
western north
8
bowhead
5
north
4
pacific bowhead
4
whales occur
4

Similar Publications

The reduced genetic diversity and frequent inbreeding associated with small population size may underpin the accumulation and expression of deleterious mutations (mutation load) in some declining populations. However, demographic perturbations and inbreeding coupled with purifying selection can also purge declining populations of deleterious mutations, leading to intriguing recoveries. To better understand the links between deleterious genetic variation and population status, we assess patterns of genetic diversity, inbreeding, and mutation load across the genomes of three species of whale with different demographic histories and recoveries following the end of commercial whaling in the 1980s.

View Article and Find Full Text PDF

At over 200 years, the maximum lifespan of the bowhead whale exceeds that of all other mammals. The bowhead is also the second-largest animal on Earth, reaching over 80,000 kg. Despite its very large number of cells and long lifespan, the bowhead is not highly cancer-prone, an incongruity termed Peto's Paradox.

View Article and Find Full Text PDF

Assessing genetic structure and diversity in wildlife is particularly important in the context of climate change. The Arctic is rapidly warming, and endemic species must adapt quickly or face significant threats to persistence. Bowhead whales (Balaena mysticetus) and narwhals (Monodon monoceros) are two long-lived Arctic species with similar habitat requirements and are often seen together in the Canadian Arctic.

View Article and Find Full Text PDF

In the Atlantic Arctic, bowhead whales () were nearly exterminated by European whalers between the seventeenth and nineteenth centuries. The collapse of the East Greenland-Svalbard-Barents Sea population, from an estimated 50 000 to a few hundred individuals, drastically reduced predation on mesozooplankton. Here, we tested the hypothesis that this event strongly favoured the demography of the little auk (), a zooplanktivorous feeder competitor of bowhead whales and the most abundant seabird in the Arctic.

View Article and Find Full Text PDF

Automated approach for recovering modal components in shallow waters.

J Acoust Soc Am

April 2024

Centre de mathématiques appliquées de l'Ècole Polytechnique, Centre National de la Recherche Scientifique, Ècole Polytechnique, Institut Polytechnique de Paris, Palaiseau, 91120, France.

This paper proposes a fully automated method for recovering modal components from a signal in shallow waters. The scenario involves an unknown source emitting low-frequency sound waves in a shallow water environment, and a single hydrophone recording the signal. The proposed automated algorithm is based on the warping method to separate each modal component in the time-frequency space.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!