Results 21 to 30 of about 3,951 (203)

How is the third jaw joint in whales different? Diverse modes of articulation between the jaws of whales. [PDF]

J Anat
This study conducts the first comprehensive morphological investigation of the mandibular symphysis in whales. Using gross anatomical observation and CT cross‐sectional data, we describe diverse joint morphologies across 74 extant and fossil cetacean taxa. Toothed whales exhibit unfused, partially fused, or fully fused symphyses.
Strauch RJ, Pyenson ND, Peredo CM.
europepmc   +2 more sources

VARAMIENTOS Y AVISTAMIENTOS DE BALLENAS EDENTADAS (CETACEA: MYSTICETI) EN COSTAS Y AGUAS CUBANAS.

Revista de Investigaciones Marinas, 2023
En la actualidad es insuficiente la información que se posee sobre las ballenas que se presentan en el archipiélago cubano. El presente trabajo tiene como objetivo recopilar toda la información existente sobre estos cetáceos varados o avistados en ...
Miriam Blanco
doaj   +1 more source

A new Miocene baleen whale from the Peruvian desert [PDF]

Royal Society Open Science, 2016
The Pisco-Ica and Sacaco basins of southern Peru are renowned for their abundance of exceptionally preserved fossil cetaceans, several of which retain traces of soft tissue and occasionally even stomach contents.
Felix G. Marx, Naoki Kohno
doaj   +1 more source

How large should whales be? [PDF]

, 2013
The evolution and distribution of species body sizes for terrestrial mammals is well-explained by a macroevolutionary tradeoff between short-term selective advantages and long-term extinction risks from increased species body size, unfolding above the 2g
A Clauset, A Clauset, A Clauset, Aaron Clauset, AD Davidson, AP Martin, B Van Valkenburgh, BE Stewart, BK Ahlborn, BK Ahlborn, BK McNab, CA Long, CR Allen, D Nagorsen, DM Raup, DW McShea, EP White, FA Smith, FA Smith, G Hunt, GB West, GP Wilson, J Alroy, J Alroy, J Alroy, J Koz lowski, J Potvin, JA Goldbogen, JF Downhower, JH Brown, K Van Waerebeek, KP Sebens, LH Liow, M Lomolino, MW Newcomer, OP Pearson, P Borsa, PJ Clapham, PJ Stacey, PJ Stacey, RC Best, Renaud Lambiotte, RR Reeves, SM Stanley, SM Stanley, TA Jefferson, TA Jefferson, TA Jefferson, TA Jefferson, TA Jefferson, TA Jefferson, TA Jefferson, TW Cranford, WF Perrin, WF Perrin, WF Perrin, ZX Luo   +56 more
core   +7 more sources

Borealodon osedax, a new stem mysticete (Mammalia, Cetacea) from the Oligocene of Washington State and its implications for fossil whale-fall communities [PDF]

Royal Society Open Science, 2019
Baleen whales (mysticetes) lack teeth as adults and instead filter feed using keratinous baleen plates. They do not echolocate with ultrasonic frequencies like toothed whales but are instead known for infrasonic acoustics.
B. K. Shipps, Carlos Mauricio Peredo, Nicholas D. Pyenson   +2 more
doaj   +1 more source

Salishicetus meadi, a new aetiocetid from the late Oligocene of Washington State and implications for feeding transitions in early mysticete evolution [PDF]

Royal Society Open Science, 2018
Living baleen whales, or Mysticeti, lack teeth and instead feed using keratinous baleen plates to sieve prey-laden water. This feeding strategy is profoundly different from that of their toothed ancestors, which processed prey using the differentiated ...
Carlos Mauricio Peredo, Nicholas D. Pyenson   +1 more
doaj   +1 more source

Relationships of cochlear coiling shape and hearing frequencies in cetaceans, and the occurrence of infrasonic hearing in Miocene Mysticeti [PDF]

Fossil Record, 2018
Baleen whales (Mysticeti) are known to use low frequencies (LF; 200 Hz and below) and infrasound (< 20 Hz) for communication. The lowest hearing limits of toothed whales (Odontoceti), which are able to produce ultrasound (> 20 kHz), reach low ...
I. S. Ritsche, J. M. Fahlke, F. Wieder, A. Hilger, I. Manke, O. Hampe   +5 more
doaj   +1 more source

Fin whale sound reception mechanisms: skull vibration enables low-frequency hearing. [PDF]

PLoS ONE, 2015
Hearing mechanisms in baleen whales (Mysticeti) are essentially unknown but their vocalization frequencies overlap with anthropogenic sound sources. Synthetic audiograms were generated for a fin whale by applying finite element modeling tools to X-ray ...
Ted W Cranford, Petr Krysl
doaj   +1 more source

In search of the origin of crown Mysticeti. [PDF]

J R Soc N Z, 2023
Recent research on mysticete fossils from the Late Eocene and Oligocene has revolutionised our understanding of the diversity and evolutionary scenarios for early baleen whales. For example, aetiocetids are a possible, though controversial, lineage that bridges the gap between the toothed and baleen-bearing mysticetes, and eomysticetids show a further ...
Tsai CH.
europepmc   +3 more sources

Von der Milch zum festen Futter : Von der Abhängigkeit zur Selbständigkeit [PDF]

, 2002
Das Neugeborene ist bei Säugetieren und beim Menschen zunächst völlig von der Mutter abhängig, denn die Ernährung des oder der Nachkommen erfolgt erst einmal ganz auf Kosten der Mutter.
Langer, Peter
core   +2 more sources