Results 41 to 50 of about 9,996 (212)

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

Assessment of a non-invasive approach to pregnancy diagnosis in gray whales through drone-based photogrammetry and faecal hormone analysis

Royal Society Open Science, 2023
Knowledge of baleen whales' reproductive physiology is limited and requires long-term individual-based studies and innovative tools. We used 6 years of individual-level data on the Pacific Coast Feeding Group gray whales to evaluate the utility of faecal
A. Fernandez Ajó, E. Pirotta, K. C. Bierlich, L. Hildebrand, C. N. Bird, K. E. Hunt, C. L. Buck, L. New, D. Dillon, L. G. Torres   +9 more
doaj   +1 more source

On the Growth of the Baleen Plate of the Fin Whale and the Blue Whale [PDF]

Bijdragen tot de Dierkunde, 1965
1. In Whales variations in the thickness of the baleen plates are supposed to give an insight into certain cyclical processes in the life of the animal. To a certain extent, by means of these variations, it is possible to reach conclusions about the age of the animal and/or about its recent period of life.
openaire   +2 more sources

Diverse baleen whale acoustic occurrence around two sub-Antarctic islands: A tale of residents and visitors

Scientific Reports
Knowledge on the occurrence and behaviour of baleen whales around sub-Antarctic regions is limited, and usually based on short, seasonal sighting research from shore or research vessels and whaling records, neither of which provide accurate and ...
Fannie W. Shabangu, Tessa Munoz, Lora Van Uffelen, Bobbi J. Estabrook, Dawit Yemane, Kathleen M. Stafford, Trevor A. Branch, Els Vermeulen, Marcel A. van den Berg, Tarron Lamont   +9 more
doaj   +1 more source

Oral cavity hydrodynamics and drag production in Balaenid whale suspension feeding. [PDF]

PLoS ONE, 2017
Balaenid whales feed on large aggregates of small and slow-moving prey (predominantly copepods) through a filtration process enabled by baleen. These whales exhibit continuous filtration, namely, with the mouth kept partially opened and the baleen ...
Jean Potvin, Alexander J Werth
doaj   +1 more source

Archaeocete-like jaws in a baleen whale [PDF]

Biology Letters, 2011
The titanic baleen whales (Cetacea, Mysticeti) have a bizarre skull morphology, including an elastic mandibular symphysis, which permits dynamic oral cavity expansion during bulk feeding. How this key innovation evolved from the sutured symphysis of archaeocetes has remained unclear. Now, mandibles of the Oligocene toothed mysticete
openaire   +2 more sources

Early stages of tooth development in the harbor porpoise Phocoena phocoena

The Anatomical Record, EarlyView.
Abstract Here we describe the stages of tooth development in toothed whales on the basis of the harbor porpoise (Phocoena phocoena). The aim of the study was to find out whether these stages are identical to those of other mammals analyzed so far although toothed whales are homodont and monophyodont.
Lasse M. Mathes, Lennart Müller‐Thomsen, Stefan Huggenberger   +2 more
wiley   +1 more source

Geometric factors influencing the diet of vertebrate predators in marine and terrestrial environments [PDF]

, 2014
Predator–prey relationships are vital to ecosystem function and there is a need for greater predictive understanding of these interactions. We develop a geometric foraging model predicting minimum prey size scaling in marine and terrestrial vertebrate ...
Bielby, Jon, Carbone, Chris, Clauss, Marcus, Codron, Daryl, Enquist, Brian, Scofield, Conrad   +5 more
core   +1 more source

Individual movement modeling expands the power of migratory species observations: North Atlantic right whale case study

Limnology and Oceanography: Methods, EarlyView.
Abstract Understanding a population's distribution depends on observing the presence and movement of individuals throughout their range. For highly mobile marine species, these observations typically rely on high effort monitoring programs. Tracking enough individuals to understand trends in movement behavior is not always logistically feasible, and ...
Abigail M. Kreuser, Daniel E. Pendleton, Nicholas R. Record, Erin L. Meyer‐Gutbrod   +3 more
wiley   +1 more source

Rhyming in the cold: first evidence of soniferous fishes in the Southern Ocean

Remote Sensing in Ecology and Conservation, EarlyView.
The acoustic ecology of Southern Ocean fishes remains unknown due to a lack of dedicated acoustic research on the fishes of this ocean. Passive acoustic monitoring data were collected at the South African sub‐Antarctic Prince Edward Islands using an underwater acoustic recorder, and towed underwater Ski‐Monkey cameras were deployed to identify fish ...
Fannie W. Shabangu, Grant van der Heever, Charles von der Meden, Hannah Truter, Stephen J. Lamberth, Ofer Gon   +5 more
wiley   +1 more source