Results 61 to 70 of about 516 (167)
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 +2 more
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Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 2, February 2026.ABSTRACT Cetaceans are indicators of ocean health, influence marine ecosystem dynamics and hold socio‐economic importance for coastal whaling communities. Yet whale–whaler relationships remain poorly understood and are increasingly compromised under the triple planetary crisis of climate change, biodiversity loss and pollution. Here, we briefly outline
Melissa A. McKinney, Jeremy J. Kiszka
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The Anatomical Record, Volume 309, Issue 2, Page 397-416, February 2026.Abstract Mysticetes, or baleen whales, have an air sac on the ventral surface of the larynx known as the “laryngeal sac.” The primary hypothesis regarding this structure's function is that it is involved in sound production. However, several other functions have been proposed, including air recycling, air storage, and even buoyancy control.
Gen Nakamura +7 more
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Predators and scavengers: Polar bears as marine carrion providers
Oikos, Volume 2026, Issue 1, January 2026.Scavenging is a foraging strategy widely used across the animal kingdom and apex predators provide a large amount of energy in a food web by provisioning carrion. In the harsh environmental conditions of the Arctic, apex predators such as polar bears Ursus maritimus can provide scavenging opportunities for many species. Carrion can act as a buffer when
Holly E. L. Gamblin +5 more
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Upside-down swimming behaviour of free-ranging narwhals
BMC Ecology, 2007 Background Free-ranging narwhals (Monodon monoceros) were instrumented in Admiralty Inlet, Canada with both satellite tags to study migration and stock separation and short-term, high-resolution digital archival tags to explore diving and feeding ...
Richard Pierre +7 more
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Abundance of narwhals (Monodon monoceros) on the hunting grounds in Greenland [PDF]
Journal of Mammalogy, 2010 Narwhals (Monodon monoceros L.) occur in the Atlantic sector of the Arctic where for centuries they have been subject to subsistence hunting by Inuit in Greenland and Canada. Scientific advice on the sustainable levels of removals from narwhal populations provides the basis for quotas implemented in both Greenland and Canada.
M. P. Heide-JØrgensen +7 more
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Marine Mammal Science, Volume 42, Issue 1, January 2026.ABSTRACT Monitoring live and stranded cetaceans can be expensive and logistically challenging, resulting in knowledge gaps. Very high‐resolution (VHR) optical satellites are considered a potential solution to addressing some of these gaps. Despite success at detecting live and stranded cetaceans, satellites have only been trialed on restricted ...
Penny J. Clarke +8 more
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Updates on the Species of Shrimps in Kakkaithivu Coastal Waters, Jaffna Estuary, Sri Lanka
Tropical Agricultural Research, 2015 Shrimps are an important commercial fishery resource and highly diverse group in the world. They are considered a luxury food commodity in international trade and command an excellent market price.
S Piratheepa +2 more
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Estimating Narwhal (Monodon monoceros) Age Using Epigenetic Analysis of Skin
Marine Mammal Science, Volume 42, Issue 1, January 2026.ABSTRACT Age is an important parameter to understand species life‐history characteristics. Recently, DNA methylation methods have emerged as innovative tools to estimate the age of marine mammals. Narwhal (Monodon monoceros) epigenetic age estimates were computed using beluga (Delphinapterus leucas), killer whale (Orcinus orca), bowhead (Balaena ...
Cortney A. Watt +10 more
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Impact of Tusk Anomalies on the Long‐Term Foraging Ecology of Narwhals
Ecology and Evolution, Volume 15, Issue 11, November 2025.We combined stable δ13C and δ15N isotope analysis and genetic sexing to investigate whether narwhals with dental anomalies have a distinct long‐term foraging ecology. Our results showed no difference in stable isotope signature of two‐tusked male and one‐tusked female narwhals relative to normal‐tusked narwhals, indicating that an extra tusk does not ...
Marie Louis +11 more
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