Belugas (Delphinapterus leucas) and narwhals (Monodon monoceros) are highly social toothed Arctic cetaceans with large vocal repertoires similar acoustic profiles. Passive Acoustic Monitoring (PAM) that uses multiple hydrophones over spatiotemporal scales has been the primary method to study their populations, particularly in response rapid climate change increasing underwater noise. This marks...

ABSTRACT Rapid environmental changes in the Arctic are threatening survival of marine species that rely on predictable presence sea ice. Two mammal specialists, polar bear (Ursus maritimus) and narwhal (Monodon monoceros), appear especially vulnerable to speed capriciousness ice deterioration as a consequence their unique hunting behaviors diet, well physiological adaptations for slow-aerobic e...

Abstract We study the two-dimensional (2D) line-of-sight velocity ( V los ) field of low-inclination, late-type galaxy VV304a. The resulting 2D kinematic map reveals a global, coherent, and extended perturbation that is likely associated with recent interaction massive companion VV304b. use multiband imaging suite test-particle simulations to quantify plausible strength in-plane flows due nonax...

Concerns were raised about possible behavioral disturbance to narwhals (Monodon monoceros) when exposed shipping noise in Milne Inlet, Baffin Island, Canada. We deployed passive acoustic recorders August and September 2018 2019, along adjacent the nominal corridor. measured broadband (0.01–25 kHz) sound pressure levels (SPL) after correcting for auditory weighting function of high frequency cet...

Variation in resource selection among sub-populations may elucidate differences in fitness and life history strategies. Specifically for top marine predators, differences in movements and behavior may result from responses to variation in a patchy, dynamic environment. Satellite-linked time-depth recorders (SLTDRs) were used to examine differences in narwhal Monodon monoceros diving behavior an...

Greenland Institute of Natural Resources, Bok 570, 3900 Nuuk, Greenland (MPH, KLL, RGH) RUWPA, University of St Andrews, The Observatory, Buchanan Gardens KY16 9LZ, United Kingdom (MLB, DLB, TAM) Polar Science Center, Applied Physics Laboratory, University of Washington, 1013 NE 40th Street, Seattle, WA 98105, USA (KLL) Húsavik Research Center, University of Iceland, Hafnarstétt 3, 640 Húsavik,...

We use the 2MASS Second Incremental Release Point Source Catalog to investigate the spatial distribution of young stars in the Perseus, Orion A, Orion B, and MonR2 molecular clouds. After subtracting a semi-empirical model of the field star contamination from the observed star counts, stellar surface density maps are used to identify compact clusters and any stellar population found more unifor...

The Vembanad Lake located on the south-west coast of India, an ecological hotspot is the nursing ground of many economically important crustaceans. The prevalence of white spot syndrome virus (WSSV) among crustaceans from farmed, estuarine and marine environments surrounding the Vembanad Lake, India was detected using PCR. A total of 308 samples from aquaculture ponds consisting of six species ...