Results 31 to 40 of about 4,342 (214)

Diverging Food Web Functioning Around Southampton Island, Nunavut: The Influence of Primary Production Supply and Bathymetry [PDF]

Ecol Evol
Southampton Island hosts two distinct benthic sub‐webs, north and south. North is deeper, phytoplankton‐driven; South is shallower, more ice‐algae driven. North benthos: bottom‐up control, four trophic levels including apex predators. South benthos: walrus top‐down control, trophic truncation to three levels.
Amiraux R, Mundy C, Pierrejean M, Massicotte P, Ferguson S, Fisk A, Harris L, Hedges K, Johnson K, Niemi A, Rosenberg B, Ogloff W, Watt C, Yurkowski D.   +13 more
europepmc   +2 more sources

A review of age estimation methods in marine mammals with special reference to monodontids

NAMMCO Scientific Publications, 2018
This paper presents a critical review of methods for estimating absolute or relative age in marine mammals. Absolute age is achieved by counting growth layer groups (GLGs) in hard structures such as teeth, ear plugs, baleen, bones and claws. Relative age
Fiona L. Read, Aleta A. Hohn, Christina H. Lockyer   +2 more
doaj   +1 more source

Detecting narwhal foraging behaviour from accelerometer and depth data using mixed-effects logistic regression

Animal Biotelemetry, 2023
Background Due to their Arctic habitat and elusive nature, little is known about the narwhal (Monodon monoceros) and its foraging behaviour. Understanding its ability to catch prey is essential for understanding its ecological role, but also to assess ...
Frederik H. Jensen, Outi M. Tervo, Mads Peter Heide-Jørgensen, Susanne Ditlevsen   +3 more
doaj   +1 more source

On the availability bias in narwhal abundance estimates

NAMMCO Scientific Publications, 2022
Abundance estimation of narwhals is usually done with either visual or photographic aerial surveys. The basic estimation for both methods is detection of whales at the surface, and to obtain fully corrected abundance estimates, the at-surface detections
Mads Peter Heide-Jørgensen, Jochim Lage
doaj   +1 more source

Use of optical satellite imagery to estimate abundance of Narwhal (Monodon monoceros) in Makinson Inlet in the Canadian high Arctic

Ecological Informatics
Remote sensing technologies have expanded methods for monitoring wildlife. Very High Resolution (VHR) satellite imagery is becoming more widely used for animal detection.
Bryanna A.H. Sherbo, Marianne Marcoux, Cortney A. Watt   +2 more
doaj   +1 more source

Highly Directional Sonar Beam of Narwhals (Monodon monoceros) Measured with a Vertical 16 Hydrophone Array.

PLoS ONE, 2016
Recordings of narwhal (Monodon monoceros) echolocation signals were made using a linear 16 hydrophone array in the pack ice of Baffin Bay, West Greenland in 2013 at eleven sites.
Jens C Koblitz, Peter Stilz, Marianne H Rasmussen, Kristin L Laidre   +3 more
doaj   +1 more source

Dinkum Sands — a recently foundered Arctic island [PDF]

, 2005
Dinkum Sands was mapped in 1949 as a small island, one link in a 95-km-long chain of barrier islands near Prudhoe Bay, Alaska. Questions about its status as an Arctic island and the submerged land ownership led to a Federal/State joint monitoring program
Reimnitz, Erk
core   +1 more source

Non-Autoregressive Neural Machine Translation with Enhanced Decoder Input

, 2018
Non-autoregressive translation (NAT) models, which remove the dependence on previous target tokens from the inputs of the decoder, achieve significantly inference speedup but at the cost of inferior accuracy compared to autoregressive translation (AT ...
Guo, Junliang, He, Di, Liu, Tie-Yan, Qin, Tao, Tan, Xu, Xu, Linli   +5 more
core   +1 more source

Distribution and migrations of cetaceans in the Russian Arctic according to observations from aerial ice reconnaissance

NAMMCO Scientific Publications, 2002
This paper is based on 748 observations of belugas (Delphinapterus leucas) and 382 observations of baleen whales in the Russian Arctic, the majority of the data provided by aerial reconnaissance of sea ice (ARSI).
Stanislav E Belikov, Andrei N Boltunov
doaj   +1 more source

The religion of nature: Evangelical perspectives on the environment [PDF]

, 2010
In this paper we examine recent developments in Evangelical movements among the Inuit of the Canadian Eastern Arctic. We focus especially on Canada Awakening Ministries (CAM) and show how it successfully integrates traditional Inuit ideas and values in a
Laugrand, Frédéric, Oosten, Jarich
core   +1 more source